基于协同通信的感知无线电系统传输性能研究
|
摘要
随着无线通信业务的迅猛发展,无线频谱资源的日益紧张与当前固定频谱分配制度下频谱利用率低下之间的矛盾日趋尖锐。感知无线电技术由于能够在不对授权用户造成干扰的前提下动态地利用暂时空闲的无线频谱资源,可有效提升频谱利用率,实现开放式频谱共享而得到广泛关注。此外,协同通信技术集合了分集和中继传输技术的优势,能够使用户在复杂环境下获得空间分集增益,有效提升系统性能。基于此,论文主要研究感知无线电技术与协同通信技术相结合对提升频谱利用率和改善系统性能的贡献。论文的工作主要包括以下几个方面：
1、针对交叉共享方式(OS)下的两跳协作感知网络,研究了多个感知用户的协作感测策略,推导了在放大转发(AF)传输协议下感知系统的中断概率表达式,并提出了一种联合优化方案：在保证-定频谱感测性能指标的前提下,通过联合优化感测门限、感测时长等参数,从而最小化感知系统的中断概率,有效改善感知网络传输的可靠性。
2、针对重叠共享(US)方式下的两跳协作感知网络进行了性能分析,推导了基于放大转发中继选择(AFRS)和解码转发中继选择(DFRS)协议的两跳感知网络中断概率近似表达式及分集度。在此基础上,提出了一种混合中继选择协议(HPRS),并推导了HPRS的中断概率近似表达式及分集度。和AFRS和DFRS协议相比,HPRS可以进一步改善感知网络中断性能,提升系统的可靠性。
3、针对交叉共享方式下的多跳DF协作分集感知网络进行了性能分析,推导了在高信噪比条件下的中断概率近似表达式,并提出一种感测时长优化方案：通过对感测时长的优化,可最小化感知系统的中断概率,从而提升感知系统传输的可靠性。
4、针对重叠共享方式下的多跳DF协作分集感知网络进行了性能分析,并推导了在高信噪比条件下感知网络的中断概率近似表达式及其分集度。由于DF不能获得空间分集增益,提出改进的选择性解码转发(SDF)算法,并推导了SDF感知网络中断概率表达式及分集度。与DF相比,SDF降低了感知网络中断概率,且能获得空间满分集增益。
With the rapid development of wireless communications services, the contradiction between the spectrum resource scarcity and inefficient utilization under the current fixed spectrum allocation policy is becoming increasingly acute. Great attention has been paid to cognitive radio technology, which can dynamically reuse idle spectrum resources on the premise of the interference to the primary users avoided or limited to an acceptable level, improve spectrum efficiency and achieve open spectrum sharing policy. Besides, the cooperative communication technique can get spatial diversity gain and improve system performance effectively by converging the diversity and cooperative relay techniques. For this purpose, the dissertation focuses on the contribution of improving spectrum efficiency and system performance by combining cognitive radio and cooperative communication technologies. The major work is summarized as follows:
1、By investigating the two-hop cooperative cognitive network in overlay sharing(OS) mode, a cooperative detection strategy for multiple cognitive user system is considered and outage probability formulation on the Amplify-and-Forward(AF) protocol is deduced. By optimizing the parameters such as sensing time and threshold, an optimization scheme has been proposed, which is proven to minimize the outage probability and improve transmission reliability of cognitive network on the premise of guarantee fixed detection performance.
2、By analyzing the two-hop cooperative cognitive network in underlay sharing(US) mode, an approximate outage probability formulation and diversity order have been derived for amplify-and-forward with relay selection(AFRS) and decode-and-forward with relay selection(DFRS) protocol. On this condition, hybrid protocol with relay selection(HPRS) is proposed. Meanwhile, the approximate outage probability formulation and diversity order for HPRS were deduced. Compared with AFRS and DFRS protocol, the HPRS can achieve better outage performance and higher reliability.
3、By analyzing the multi-hop cooperative cognitive diversity network in OS mode, an approximate outage probability formulation has been derived for decode-and-forward(DF) protocol in high signal-to-noise ratio. An optimal scheme is proposed, which can improve outage performance and transmission reliability of multi-hop cognitive system by optimizing sensing time.
4、By analyzing the multi-hop cooperative cognitive diversity network in US mode, an approximate outage probability formulation and diversity order has been derived for DF protocol in high signal-to-noise ratio. As DF protocol cannot achieve space diversity gain, modified multi-hop selective decode-and-forward(SDF) protocol is proposed. An approximate outage probability formulation and diversity order are deduced for SDF protocol in high signal-to-noise ratio. Contrasted with DF protocol, SDF protocol can decrease outage probability and achieve the full space diversity.
1、针对交叉共享方式(OS)下的两跳协作感知网络,研究了多个感知用户的协作感测策略,推导了在放大转发(AF)传输协议下感知系统的中断概率表达式,并提出了一种联合优化方案：在保证-定频谱感测性能指标的前提下,通过联合优化感测门限、感测时长等参数,从而最小化感知系统的中断概率,有效改善感知网络传输的可靠性。
2、针对重叠共享(US)方式下的两跳协作感知网络进行了性能分析,推导了基于放大转发中继选择(AFRS)和解码转发中继选择(DFRS)协议的两跳感知网络中断概率近似表达式及分集度。在此基础上,提出了一种混合中继选择协议(HPRS),并推导了HPRS的中断概率近似表达式及分集度。和AFRS和DFRS协议相比,HPRS可以进一步改善感知网络中断性能,提升系统的可靠性。
3、针对交叉共享方式下的多跳DF协作分集感知网络进行了性能分析,推导了在高信噪比条件下的中断概率近似表达式,并提出一种感测时长优化方案：通过对感测时长的优化,可最小化感知系统的中断概率,从而提升感知系统传输的可靠性。
4、针对重叠共享方式下的多跳DF协作分集感知网络进行了性能分析,并推导了在高信噪比条件下感知网络的中断概率近似表达式及其分集度。由于DF不能获得空间分集增益,提出改进的选择性解码转发(SDF)算法,并推导了SDF感知网络中断概率表达式及分集度。与DF相比,SDF降低了感知网络中断概率,且能获得空间满分集增益。
With the rapid development of wireless communications services, the contradiction between the spectrum resource scarcity and inefficient utilization under the current fixed spectrum allocation policy is becoming increasingly acute. Great attention has been paid to cognitive radio technology, which can dynamically reuse idle spectrum resources on the premise of the interference to the primary users avoided or limited to an acceptable level, improve spectrum efficiency and achieve open spectrum sharing policy. Besides, the cooperative communication technique can get spatial diversity gain and improve system performance effectively by converging the diversity and cooperative relay techniques. For this purpose, the dissertation focuses on the contribution of improving spectrum efficiency and system performance by combining cognitive radio and cooperative communication technologies. The major work is summarized as follows:
1、By investigating the two-hop cooperative cognitive network in overlay sharing(OS) mode, a cooperative detection strategy for multiple cognitive user system is considered and outage probability formulation on the Amplify-and-Forward(AF) protocol is deduced. By optimizing the parameters such as sensing time and threshold, an optimization scheme has been proposed, which is proven to minimize the outage probability and improve transmission reliability of cognitive network on the premise of guarantee fixed detection performance.
2、By analyzing the two-hop cooperative cognitive network in underlay sharing(US) mode, an approximate outage probability formulation and diversity order have been derived for amplify-and-forward with relay selection(AFRS) and decode-and-forward with relay selection(DFRS) protocol. On this condition, hybrid protocol with relay selection(HPRS) is proposed. Meanwhile, the approximate outage probability formulation and diversity order for HPRS were deduced. Compared with AFRS and DFRS protocol, the HPRS can achieve better outage performance and higher reliability.
3、By analyzing the multi-hop cooperative cognitive diversity network in OS mode, an approximate outage probability formulation has been derived for decode-and-forward(DF) protocol in high signal-to-noise ratio. An optimal scheme is proposed, which can improve outage performance and transmission reliability of multi-hop cognitive system by optimizing sensing time.
4、By analyzing the multi-hop cooperative cognitive diversity network in US mode, an approximate outage probability formulation and diversity order has been derived for DF protocol in high signal-to-noise ratio. As DF protocol cannot achieve space diversity gain, modified multi-hop selective decode-and-forward(SDF) protocol is proposed. An approximate outage probability formulation and diversity order are deduced for SDF protocol in high signal-to-noise ratio. Contrasted with DF protocol, SDF protocol can decrease outage probability and achieve the full space diversity.
引文
[1]Qi Bi, et al. "Wireless mobile communication at the start of the 21st century[J]," IEEE Communications, Vol.39, No.1, pp.110-116.2001.
[2]Andrea Goldsmith. "Wireless Communication," Cambridge University Press,2005.
[3]Cimini L J. "Advanced Cellular Internet Service (ACIS)," IEEE Communication. Magazine, vol.36, no.10,1998, pp.150-159.
[4]邬贺铨.“对我国通信高技术研究的世纪开局的评述”,电子学报,2004(S1),PP.1-5.
[5]Proakis John G. "Digital Communication (影印版，第3版),"电子工业出版社,1998年.
[6]罗涛,乐光新.“多大线无线通信原理与应用,”北京邮电大学出版社,2005年11月.
[7]虞贵财.“感知无线电系统中的频谱感测技术研究,”博十学位论文,北京邮电大学,2010年4月.
[8]娄佳.“协同认知无线通信系统中感知用户传输性能研究,”博十学位论文,北京邮电大学,2010年5月.
[9]林霏.“无线网络中协同通信技术研究,”博十学位论文,北京邮电大学,2008年6月.
[10]吴伟陵,牛凯.“移动通信原理[M]”电子工业出版社,2005年1月.
[11]Van der Meulen E. "A servey of multi-way channels in information theory," IEEE Transactions on information theory, Jul.1977,23(1) pp.572-584.
[12]Cover T M, Gamal A A E. "Capacity theorems for the relay channel," IEEE Transactions on information theory, Sept.1979,25(5) pp.572-584.
[13]Aggelouand G N, Tafazolh R. "On the relaying capacity of next generation GSM cellular networks," IEEE Personal Communications, vol.8, no.1, Feb.2001, pp.40-47.
[14]Laneman J N. "Cooperative diversity in wireless networks:Algorithms and architectures," Ph.D Thesis, Massachusetts Institute of Technology, Cambridge,MA, August 2002.
[15]Hasna M O, Alouini M-S. "Outage probability of multihop transmissions over Nakagami fading channels," In Proc. of the IEEE ISWC'2002, Sardinia, Italy,Sep.2002, pp.207-208.
[16]Herhold P, Zimmermann E, Fettweis G. "On the performance of cooperative amplify-and-forward relay networks [C]," In Proc Conf Source and Channel Coding,2004, pp.451-458.
[17]Hasna M O, Alouini M-S. "A performance study of dual-hop transmissions with fixed gain relays," IEEE Transactions on Wireless Communications, vol.3, no.6, Nov.2004, pp.1963-1968.
[18]Laneman J N, Tse D N. "Cooperative diversity in wireless networks:Efficient protocols and outage behavior[J]," IEEE Transactions on Information Theory, vol.50, no.12, Dec.2004, pp.3062-3080.
[19]Lin Y, Hasna M O, Alouini M-S. "Average outage duration of multihop communication systems with regenerative relays," IEEE Transactions on Wireless Communications, vol.4, no.4, July.2005, pp.1366-1371.
[20]Hasna M O, Alouini M-S. "End-to-end performance of transmission systems with relays over Rayleigh-fading channel [J]," IEEE Transactions on Wireless Communications, vol.2, no.6, June 2005, pp.2020-2040.
[21]Seddik K G, Sadek A K, Su Wei-feng. "Outage analysis of multi-node amplify-and-forward relay networks[C]," In Proc.the IEEE WCNC'2006, LasVegas, USA, Mar.2006, pp.1184-1188.
[22]A1-Hanbali A, Kherani A A, Groenevelt R, et al. "Impact of mobility on the performance of relaying in ad hoc networks," In Proc. of the IEEE INFOCOM'2006, Barcelona, Spain, Apr.2006, pp:1-12.
[23]Fallahi A, Hossain E, Alfa A S. "QoS and energy trade off in distributed energy-limited mesh/relay networks:a queuing analysis," IEEE Transactions on Parallel and Distributed Systems, vol.17, no.6, Jan.2006, pp.5766-5922.
[24]Ibrahim A S, Sadek A K, Feng S W. "Relay selection in multi-node cooperative communications:When to cooperate and whom to cooperate with?" In Proc. of the IEEE GLOBECOM 2006, San Francisco, USA, Nov.2006, pp.3068-3072.
[25]彭木根,王文博.“协同无线通信原理与应用[M]”，机械工业出版社,2008年10月.
[26]Ian F. Akyidiz, Won-Yeol Lee, Mehmet C. Vuran, shantidev Mohanty. "Next generation/dynamic spectrum access/cognitive radio wireless networks:a survey". Computer Network, Volume 50, Issue 13, September 2006, pp.2127-2159.
[27]周小飞,张宏纲.“认知无线电原理及应用,”北京邮电大学出版社,2007年7月.
[28]谢显中.“感知无线电技术及其应用,”电子工业出版社,2008年4月.
[29]Weiss T. A. and Jondral F. K. "Spectrum pooling:an innovative strategy for the enhancement of spectrum efficiency [J]," IEEE Radio Communication,March 2004, pp. S8-S14.
[30]Haykin S. "Cognitive radio:brain-empowered wireless communications," IEEE Journal on Selected Areas in Communications, vol.23, no.2, Jan.2005, pp.201-220.
[31]Akyildiz I. F., Lee Won-Yeol, Vuran M. C., et al. "NeXt generation/dynamic spectrum access /cognitive radio wireless networks:A survey [J],"Computer Networks, Vol.50,2006, pp.2127-2159.
[32]Ganesan G, Le Y. "Cooperative spectrum sensing in cognitive radio, part I:Two user networks, " IEEE Transactions Wireless Communications, vol.6, no.6, June 2007, pp.2204-2213.
[33]Ganesan G, Le Y. "Cooperative spectrum sensing in cognitive radio, part II:Multiuser networks, " IEEE Transactions Wireless Communications, vol.6, no.6, June 2007, pp.2214-2222.
[34]Simeone O, Spagnolini U, Bar-Ness Y. "Stable throughput of cognitive radios with and without relaying capability," IEEE Transactions Communications, vol.55, no.12, Dec.2007, pp.2351-2360.
[35]Simeone O, Spagnolini U." Cooperation and cognitive radio," In Proc. of the IEEE ICC 2007, Glasgow, Scotland, Dec.2007, pp.6511-6515.
[36]Devroye N, Mitran P, Tarokh V. "Cognitive multiple access networks," In Proc. of the IEEE ISIT'2005, Adelaide, Australia, Sept.2005, pp.57-61.
[37]Devroye N, Mitran P, Tarokh V. "Achievable rates in cognitive radio channel," IEEE Transactions on Information Theory, vol.52, no.5, May 2006, pp.1823-1817.
[38]Devroye N, Mitran P, Tarokh V. "Limits on communications in a cognitive radio channel," IEEE Communications Magazine, vol.44, no.6, June 2006, pp.44-49.
[1]罗涛,乐光新.“多天线无线通信原理与应用,”北京邮电大学出版社,2005.11,pp.3-9.
[2]Mischa Dohler. "Virtual Antenna Arrays, " PhD thesis, King's College London,2003.
[3]FCC. "Spectrum policy task force report," ET Docket No.02-135, Nov 02,2002.
[4]Mitola J. "Cognitive radio:making software radios more personal," IEEE Pers Commnu., 1999,6(4).
[5]Gambini, J, Simeone O, and Spagnolini U, et al. "Cooperative cognitive radios with optimal primary detection and packet acceptance control [C]," Signal Processing Advances in Wireless Communications,2007, pp.1-5.
[6]Gong Xiaowen, Yuan Wei, and Liu Wei, et al. "A Cooperative Relay Scheme for Secondary Communication in Cognitive Radio Networks [C]," In Proc. of the IEEE GLOBECOM'2008, New Orleans, USA,2008, pp.1-6.
[7]Mietzner J, Lampe L, Schober R. "Performance Analysis for a Fully Decentralized Transmit Power Allocation Scheme for Relay-Assisted Cognitive-Radio Systems [C]," In Proc. of the IEEE GLOBECOM'2008, New Orleans, USA,2008, pp.1-6.
[8]Sridharan S, Vishwanath S and Jafar S A, et al. "On the capacity of cognitive relay assisted Gaussian interference channel [C]," in Proc. ISIT,2008, pp.549-553.
[9]Do T, Mark B L. "Cooperative communication with regenerative relays for cognitive radio networks [C]," Annual Conference on Information Sciences and Systems (CISS),2010, pp.1-6.
[10]Lee K, Yener A. "Outage performance of cognitive wireless relay networks[C]," In Proc. of the IEEE GLOBECOM'2006, San Francisco, USA, Dec.2006, pp.6511-6515.
[11]Yue Wenjing, Zheng Baoyu, Meng Qingmin. "Optimal Power Control for Cognitive Relay Networks over Fading Channels [C]," ICFN'10. Second International Conference,2010, pp. 281-285.
[12]Sahin, O, Erkip, E. "Cognitive relaying with one-sided interference [C]," Signals, Systems and Computers,2008 42nd Asilomar Conference,2008, pp.689-694.
[13]Simeone O, Spagnolini U, Bar-Ness Y. "Stable throughput of cognitive radios with and without relaying capability," IEEE Transactions on Communications, vol.55, no.12, Dec. 2007, pp.2351-2360.
[14]FP6 End-to-End Reconfigurability (R2R Ⅱ) Integrated Project(IP), http://www.ntia.doc.gov/ osmhome/allochrt.pdf.
[15]I. F. Akyildiz, Won-Yeol Lee, M. C. Vuran*, et al. "NeXt generation/dynamic spectrum access/cognitive radio wireless networks: A survey [J]," Computer Networks, Vol.50,2006, pp.2127-2159.
[16]T. A. Weiss and F. K. Jondral. "Spectrum pooling:an innovative strategy for the enhancement of spectrum efficiency [J]," IEEE Radio Communication, March 2004, pp. S8-S14.
[17]M. A. McHenry. "NSF spectrum occupancy measurements project summary," In Shared Spectrum Company Report, August 2005.
[18]Q.Zhao and B.Sadler. "A survey of dynamic spectrum access," Signal Processing Magazine, IEEE,vol.24,pp.79-89,May 2007.
[19]陈东.“认知无线电中无线频谱感知技术的研究,”博十学位论文,西安电子科技大学,2009年1月.
[20]L.Xu, R.Tonjes, T.Paila, W.Hansmann,M.Frank, and M.Albrecht. "Driving to the internet: dynamic radio for ip services in vehicular environments," Local Computer Networks,2000. LCN 2000. Proceedings.25th Annual IEEE Conference on, pp.281-289,2000.
[21]D.Hatfield and P.Weiser. "Property rights in spectrum:taking the next step," New Frontiers in Dynamic Spectrum Access Networks,2005. DySPAN 2005.2005 First IEEE International Symposium on, pp.43-55, Nov.2005.
[22]J.Mitola. "Cognitive radio:an integrated agent architecture for software defined radio," Ph.d.dissertation, KTH Royal Institute of Technology, Stockholm,2000.
[23]FCC, "Facilitating Opportunities for Flexible, Eficient Reliable Spectrum Use Employing Cognitive Radio Technologies," ET Docket No.03-322,2003.
[24]F.K. Jondral. "Software-Defined Radio-Basic and Evolution to Cognitive Radio", EURASIP J. Wireless Commun. and Networking,2005.
[25]http://www.ieee802.org/22/.
[26]http://www.winlab.rutgers.edu/pub/docs/focus/Cognitive-Hw.html.
[27]J. Neel, J. Reed. "Game theory implications for cognitive radio design," SDR Forum Workshop on Cognitive Radio, San Francisco, April 10,2008.
[28]Weiss T, Spiering M, Jondral F. "Quality of service in spectrum pooling system," Personal, Indoor and Mobile Radio Commnications(PIMRC 2004), vol.1, Sept 2004, pp.345-349.
[29]Brodersen R W, et al. "Coruvs:a cognitive radio approach for usage of virtual unlicensed spectrum," Berkeley Wireless Research Center (BWRC) White paper,2004.
[30]DAPRA XG WG, The XG Architectural framework V1.0,2003.
[31]DAPRA XG WG, The XG Vision RFC V1.0,2003.
[32]郭彩丽,冯春燕,刘芳芳.“一种认知无线电网络中的新型主动频谱选择算法[J],”西安电子科技大学学报,2008,35(6)：1121-1126.
[33]Yue Wang, Chunyan Feng, Zhimin Zeng, Caili Guo. " A robust and energy efficient cooperative spectrumsensing scheme in cognitive radio networks[C]," IEEE Advanced Communication Technology Conference 2009(ICACT 2009), Feb 2009. pp:640-645.
[34]Sahai A., Hoven N., Tandra R., "Some fundamental limits in cognitive radio," Allerton Conf. on Communications, Control and Computing 2004, October 2004, pp.:1-5.
[35]Urkowitz H., "Energy detection of unknown deterministic signals," Proceedings of the IEEE, Vol.55, No.4, Apr.1967, pp.:523-531.
[36]Digham F., .Alouini M.S., Simon M.K., "On the energy detection of unknown signals over fading channels," Porc, of IEEE International conference on Communications, Vol.55, May 2003, pp.3575-3579.
[37]Oner M. and Jondral F., "Cyclostationarity-based methods for the extraction of the channel allocation information in a spectrum pooling system," Proc. of IEEE Radio and Wireless Conference, Sept.2004, pp.279-282.
[38]FCC, ET Docket No.03-237 Notice of inquiry and notice of proposed Rulemaking, November 2003.
[39]Brown T.X., "An analysis of unlicensed device operation in licensed broadcast service bands," Proc. IEEE International Dynamic Spectrum Access Networks, November 2005, pp. 11-29.
[40]Wolfram Research [Online]. Available:http://scienceworld.Wolfram.com/physics/antenna temperature.html.
[41]C. Raman, R.D. Yates, N.B. Mandayam, "Scheduling variable rate links via a spectrum server," Proc. IEEE DySPAN 2005, November 2005, pp.110-118.
[42]H. Zheng, L. Cao, "Device-centric spectrum management," Proc. IEEE DySPAN 2005, November 2005, pp.56-65.
[43]Zhao Chengzhi, Zou Mingrui, Shen Bin, Kim Bumjung and Kwak Kyungsup, "Cooperative Spectrum Allocation in Centralized Cognitive Networks Using Bipartite Matching," IEEE GLOBECOM 2008.
[44]Mark Felegyhazi, Mario Cagalj, Shirin Saeedi Bidokhti, Jean-Pierre Hubaux, "Non-cooperative Multi-radio Channel Allocation in Wireless Networks," IEEE INFOCOM 2007.
[45]Menon R, Buehrer RM, Reed JH, "Outage probability based comparison of underlay and overlay spectrum sharing techniques," Proc. IEEE DySPAN 2005,2005, pp.01-109.
[46]彭木根,王文博.“协同无线通信原理与应用[M],”机械工业出版社,2008.
[47]Cover T M, Gamal A A E. "Capacity theorems for the relay channel," IEEE Transactions on information theory, vol. IT-25, Sept.1979, pp.572-584.
[48]Cover T M, Thomas J A. "Elements of information theory[M]," New York:Wiley,1991.
[49]Aria Nosratinia, Todd E. Hunter, Ahmadreza Hedayat, "Cooperative Communication in Wireless Networks," IEEE Communications Magazine, October2004, pp.74-80.
[50]Hasna M O, Alouini M-S. "End-to-end performance of transmission systems with relays over Rayleigh fading channel[J]," IEEE Transactions on Wireless Communications, vol.2, no.6, June 2005, pp.2020-2040.
[51]Laneman J N, Tse D N. "Cooperative diversity in wireless networks:Efficient protocols and outage behavior[J]",IEEE Transactions on Information Theory, vol.50, no.12, Dec.2004, pp.3062-3080.
[52]Sendonaris A, Erkip A, Aazhang B. "User cooperation diversity-part I:system description[J]," IEEE Transactions on Communications, vol.51, no.11, Nov.2003, pp.1927-1938.
[53]Sendonaris A, Erkip A, Aazhang B. "User cooperation diversity-part II:implementation aspects and performance analysis[J]," IEEE Transactions on Communications, vol.51, no.11, Nov.2003, pp.1939-1948.
[54]Hunter T E, Nosratinia A. "Cooperation Diversity through Coding," In Proc. of the IEEE ISIT'2002, Lausanne, Switzerland, July 2002, p.220.
[55]Nosratinia A, Hunter T E, Hedayat A. "Cooperative communication in wireless networks," IEEE Transactions on Communication Magazine, vol.42, no.10, Oct.2004, pp.74-80.
[56]Hunter T E, Nosratinia A. "Outage analysis of code cooperation," IEEE Transactions on Information Theory, vol.52, no.2, Feb.2006, pp.375-391.
[57]Laneman J N, Wornell G. "Distributed space-time coded protocols for exploiting cooperative diversity in wireless networks," IEEE Transactions on Information Theory, vol.49, no.10, Oct. 2004, pp.2415-2425.
[58]Stefanov A, Erkip E. " Cooperative space-time coding for wireless networks," IEEE Transactions Communications, vol.53, no.11, Nov.2005, pp.1804-1809.
[59]Hasna M O, Alouini M-S. "Outage probability of multihop transmissions over Nakagami fading channels," In Proc. of the IEEE ISWC 2002, Sardinia, Italy, Sep.2002, pp.207-208.
[60]Lin Y, Hasna M O, Alouini M-S. "Average outage duration of multihop communication systems with regenerative relays," IEEE Transactions on Wireless Communications, vol.4, no.4, July.2005, pp.1366-1371.
[61]Seddik K G, Sadek A K, Su Wei-feng. "Outage analysis of multi-node amplify-and-forward relay networks, " In Proc. the IEEE WCNC'2006, Las Vegas, USA, Mar.2006, pp.1184-1188.
[62]Ibrahim A S, Sadek A K, Feng S W. " Relay selection in multi-node cooperative communications:When to cooperate and whom to cooperate with?" In Proc. of the IEEE GLOBECOM 2006, San Francisco, USA, Nov.2006, pp.3068-3072.
[63]Boyer J, Falconer D D, and Yanikomeroglu H. "Multi-hop diversity in wireless relaying channels," IEEE Transactions on Wireless Communications, vol.52, Oct.2004. pp. 1820-1830。
[64]Boyer J. "Multihop wireless communications channels," Master's thesis, Carleton University, Ottawa, ON, Canada,2001.
[65]Golnaz F, Norman C. B, "Fixed relaying versus selective relaying in multi-hop diversity transmission system," IEEE Transactions on Communications, vol.58, no.3, Mar.2010, pp.956-965.
[66]罗涛,郝建军,乐光新.“多用户协同通信与感知技术,”中兴通信技术,2009年2月.
[67]林霏.“无线网络中协同通信关键技术的研究,”博士学位论文,北京邮电大学,2008年7月.
[68]Simeone O, Spagnolini U, Bar-Ness Y. "Stable throughput of cognitive radios with and without relaying capability[J]," IEEE Transactions Communications, vol.55, no.12, Dec.2007, pp.2351-2360.
[69]Simeone O, Spagnolini U. "Cooperation and cognitive radio[C]," In Proc. ofthe IEEE ICC'2007, Glasgow, Scotland, Dec.2007, pp.6511-6515.
[70]Ganesan G, Le Y. "Cooperative spectrum sensing in cognitive radio, part Ⅰ:Two user networks [J]," IEEE Transactions Wireless Communications, vol.6, no.6, June 2007, pp.2204-2213.
[71]Ganesan G, Le Y. "Cooperative spectrum sensing in cognitive radio, part Ⅱ:Multiuser networks[J]," IEEE Transactions Wireless Communications, vol.6, no.6, June 2007, pp.2214-2222.
[72]Ghasemi A, Sousa E S. "Collaborative spectrum sensing in cognitive radio networks," In Proc. of the IEEE DySPAN'2005, Baltimore, USA, Nov.2005, pp.131-136.
[73]S. M. Mishra, A. Sahai and R. Brodersen. "Cooperative sensing among cognitive radios[C]," IEEE Int. Conf. Commun., Turkey, June 2006, pp.1658-1663.
[74]Qian Chen, Motani M. "Cooperative spectrum sensing strategies for cognitive radio mesh networks [J]," IEEE Journal of Selected Topics in Signal Processing, vol.5, no.1, Feb 2011, pp.56-67.
[75]Yang Han. "Cooperative decode-and-forward relaying for secondary spectrum access," IEEE Transactions Wireless Communications, vol.8, no.10, Oct 2009, pp.4945-4950.
[76]K. Lee and A. Yener. "Outage performance of cognitive wireless relaynetworks," Proc. IEEE GLOBECOM, Nov.2006.
[77]T. Luo and F. Lin. "Multicarrier Modulation and Cooperative Commnication in Multihop Cgonitive Radio Networks," IEEE Wireless Communications, vol.18, no.1, Feb 2011, pp.38-45.
[78]Chunhua Sun and Khaled Ben Letaief. " User Cooperation in Heterogeneous Cognitive Radio Networks with Interference Reduction[J]," ICC 2008 proceedings,2008, pp.3193-3197.
[79]Y. Guo, G. Kang. "Outage performance of relay-assisted cognitive-radio system under spectrum-sharing constraints[J]," Electronics Letters,2010, pp.182-184.
[1]Cabric D, Mishra S M, Brodersen R W. "Implementation issues in spectrum sensing for cognitive radios," In the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers, Vol.1, Nov.2004, pp.772-776.
[2]Hillenbrand J., Weiss T.A., Jondral F.K. "Calculation of detection and false alarm probabilities in spectrum pooling systems," IEEE Communications Letters, Vol.9(4),Apr.2005, pp.349-351.
[3]Ghasemi A., E.S.Sousa. "Collaborative spectrum sensing for opportunistic access in fading environments," In Proc. of 2005 First IEEE International Symposium on New Frontiers in Dynamic Spectrum Access Networks, Nov.2005, pp.131-136.
[4]Ganesan G., Li Ye. "Agility improvement through cooperative diversity in cognitive radio," In Pore. of IEEE Global Telecommunications Conference, Vol.5, Nov.2005, pp.2505-2509.
[5]Ganesan G., Li Ye. "Cooperative spectrum sensing in cogvitive radio networks," In Proc. of First IEEE International Symposium on New Frontiers in Dynamic Spectrum Access Networks, Nov.2005, pp.137-143.
[6]Zhang Q., Andre B.J., Gerard J.M. "A reconfigurable radio architecture for cognitive radio in emergency networks," In Porc, of the 9th European Conference on Wireless Technology, Sept. 2006, pp.35-38.
[7]Y. C. Liang, Y. Zeng, E. C. Y. Peh, and A. T. Hoang, "Sensing throughput tradeoff for cognitive radio networks," IEEE Trans. Wireless Communications, vol.7, no.4, Apr.2008, pp. 1326-1337.
[8]A T Hoang, Y C Liang, D Wong, Y Zeng, and R Zhang. "Opportunistic spectrum access for energy-constrained cognitive radios," IEEE Trans. Wireless Communications, vol.8, no.3, Mar.2009, pp.1206-1211.
[9]J Luo, R S Blum, L J Cimini, L J Greenstein. " Decode-and-forward cooperative diversity with power allocation in wireless network[J]," IEEE Trans. Wireless Communications,2007,6(3), pp.793-799.
[10]林霏,罗涛,乐光新.“不同功率分配与中继位置下协同通信SER性能分析[J],”中国电机工程学报,2008,28(19),pp.101-105.
[11]Simeone O, Spagnolini U, Bar-Ness Y. "Stable throughput of cognitive radios with and without relaying capability[J]," IEEE Trans. Communications,vol.55, no.12, Dec.2007, pp.2351-2360.
[12]Simeone O, Spagnolini U. "Cooperation and cognitive radio[C]," In Proc. of the IEEE ICC'2007, Glasgow, Scotland, Dec.2007, pp.6511-6515.
[13]Ganesan G, Le Y. "Cooperative spectrum sensing in cognitive radio, part Ⅰ:Two user networks[J]," IEEE Trans. Wireless Communications, vol.6, no.6, June 2007, pp.2204-2213.
[14]Ganesan G, Le Y. "Cooperative spectrum sensing in cognitive radio, part Ⅱ:Multiuser networks[J]," IEEE Trans. Wireless Communications, vol.6, no.6, June 2007, pp.2214-2222.
[15]Sahai A, Hoven N, Tandra R. "Some fundamental limits in cognitive radio," Allerton Conf. on Communications, Control and Computing 2004, October 2004, pp.1-5.
[16]Urkowitz H. "Energy detection of unknown deterministic signals," Proceedings of the IEEE, Vol.55, No.4, Apr.1967, pp.523-531.
[17]Digham F, Alouini M S, Simon M K. "On the energy detection of unknown signals over fading channels," Porc. of IEEE International conference on Communications, Vol.55, May 2003, pp.3575-3579.
[18]Gardner W A. "Signal interception:a unifying theoretical framework for feature detection,' IEEE Trans. on Communications, vol.36, No.8, Aug.1998, pp.897-906.
[19]Oner M, and Jondral F. "Cyclostationarity-based methods for the extraction of the channel allocation information in a spectrum pooling system," Proc. of IEEE Radio and Wireless Conference, Sept.2004, pp.279-282.
[20]Yuan Yan, Anxin Li, Kayama, H. "Study on Soft Decision based Cooperative Sensing in Cognitive Radio Network[J]," Vehicular Technology Conference Fall,2009.
[21]J N Laneman, D N C Tse, and G W Wornell. "Cooperative diversity in wireless networks: efficient protocols and outage behavior," IEEE Trans. Information Theory, vol.50, no.12, Dec.2004, pp.3062-3080.
[22]J Luo, R S Blum, L J Cimini, L J Greenstein. "Decode-and-forward cooperative diversity with power allocation in wireless network[J]," IEEE Trans. Wireless Communications,2007,6(3), pp.793-799.
[1]Chunhua Lun and Khaled Ben Letaief. "User Cooperation in Heterogeneous Cognitive Radio Networks with Interference Reduction[J]," ICC 2008 proceedings,2008, pp.3193-3197.
[2]Y. Guo, G. Kang. "Outage performance of relay-assisted cognitive-radio system under spectrum-sharing constraints[J]," Electronics Letters,2010, pp.182-184.
[3]Simeone O, Spagnolini U. "Cooperation and cognitive radio [C]," In Proc. of the IEEE ICC'2007, Glasgow, Scotland, Dec.2007, pp.6511-6515.
[4]Dabora R, Mari'c I, and Goldsmith A. "Relay strategies for interference-forwarding," in IEEE Inf. Th. Workshop, Porto, Portugal, May 2008.
[5]Mari'c I, Dabora R, and Goldsmith A. "On the capacity of the interference channel with a relay," in IEEE Int. Symp. Inf. Theory, Toronto, Canada, Jul.2008.
[6]Mari'c I, Dabora R, and Goldsmith A. "Generalized relaying in the presence of interference," in Asilomar Conference on Signals, Systems and ComLUters, Pacific Grove, CA, Oct.2008.
[7]林霏.“无线网络中协同通信关键技术的研究,”博十学位论文,北京邮电大学,2008年7月.
[8]娄佳.“协同感知无线通信系统中的感知用户传输性能研究,”博士学位论文,北京邮电大学,2010年7月.
[9]Devroye N, Mitran P, and Tarokh V. "Limits on communications in a cognitive radio channel," IEEE Communications Magazine, vol.44, no.6, June 2006, pp.44-49.
[10]Etkin R, Parekh A, Tse D. "Spectrum sharing for unlicensed bands," In Proc. of the IEEE DySPAN'2005, Baltimore, USA, Nov.2005, pp.251-258.
[11]Devroye N, Mitran P, Tarokh V. " Achievable rates in cognitive radio channel,"IEEE Transactions on Information Theory, vol.52, no.5, May 2006, pp.1823-1817.
[12]ZhaoY, AdVe R. "Improving amplify-and-forward relaying networks:optimal power allocation versus selection[J]," Wireless Communieations, IEEE Transactions on.2007,6(8), pp.3114-3123.
[13]Bletsas A, Shin H, Win M. "Outage Optimality of Opportunistic AmPlify-and-Forward Relaying [J]," Communications Letters, IEEE.2007,11(3), pp.261-263.
[14]Sreng V, Yanikomeroglu H, Falconer D. "Relayer selection strategies in cellular networks with Peer-to-Peer relaying[C]," In VTC 2003-Fall. IEEE 58th October 6-9,2003, pp.1949-1953.
[15]Bletsas A, Khisti A, Reed D, et al. "A simple cooperative diversity method based on network path selection[J],"Selected Areas in Communications, IEEE Jounlal on.2006,24(3), pp. 659-672.
[16]K. Lee and A. Yener. "Outage performance of cognitive wireless relaynetworks," Proc. IEEE GLOBECOM, Nov.2006.
[17]J.N.Laneman, D.N.C.Tse, and G.W.Wornell. "Cooperative diversity in wireless networks: efficient protocols and outage behavior[J]," IEEE Trans. on Information Theory, vol.50, no. 12, Dec.2004, pp.3062-3080.
[18]Li Y, Vucetic B, Zhou Z, Dohler M. "Distributed adaptive power allocation for wireless relay networks[J]," IEEE Transactins on Wireless Communications, vol.6,no.3, Mar.2007, pp.948-958.
[19]Souryal M R, Vojcic B R. "Performance of amplify-and-forward and decode-and-forward relaying in Rayleigh fading with turbo codes," In Proc. of the IEEE ICASSP'2005, Adelaide Australia, Mar.2005, pp.14-19.
[20]Weifeng Su, and Xin Liu. "On optimum selection relaying protocols in cooperative wireless networks[J]," IEEE Transactins on Wireless Communications,vol.58, no.1, Jan.2010.
[21]Yonghui Li, Vucetic, B, Zhuo Chen, Jinhong Yuan. "An Improved Relay Selection Scheme with Hybrid Relaying Protocols," In GLOBECOM'07 IEEE,26-30 Nov.2007, pp.3704-3708.
[22]Luo J H, Blum R S, Cimini L, et al. "Power allocation in a transmit diversity system with mean channel gain information[J]," IEEE Communications Letters, vol.9, no.7, July.2005, pp.616-618.
[23]Laneman J N, Wornell G. "Distributed space-time coded protocols for exploiting cooperative diversity in wireless networks [J]," IEEE Trans. on Information Theory, vol.49, no.10, Oct. 2004, pp.2415-2425.
[1]Wu H, Qiao C, Tonguz O K. "A new generation wireless system with integrated cellular and mobile relaying technologies," In Proc. of WAS'2000, Dec.2000, pp.55-62.
[2]Hasna M O, Alouini M-S. "Outage probability of multihop transmissions over Nakagami fading channels," In Proc. of the IEEE ISWC'2002, Sardinia, Italy, Sep.2002, pp.207-208.
[3]Hasna M O, Alouini M S. "A performance study of dual-hop transmissions with fixed gain relays," IEEE Transactions on Wireless Communications, vol.3, no.6, Nov.2004, pp.1963-1968.
[4]Lin Y, Hasna M O, Alouini M-S. "Average outage duration of multihop communication systems with regenerative relays," IEEE Transactions on Wireless Communications, vol.4, no.4, July.2005, pp.1366-1371.
[5]Karagiannidis G K. "Performance bounds of multihop wireless communications with blind relays over generalized fading channels," IEEE Transactions on Wireless Communications, vol.5, no.3, March.2006, pp.498-503.
[6]Boyer J, Falconer D D, and Yanikomeroglu H, "Multi-hop diversity in wireless relaying channels," IEEE Transactions on Wireless Communications, vol.52, Oct.2004, pp. 1820-1830。
[7]Boyer J, "Multihop wireless communications channels," Master's thesis, Carleton University, Ottawa, ON, Canada,2001.
[8]Golnaz F, Norman C. B, "Fixed relaying versus selective relaying in multi-hop diversity transmission system," IEEE Transactions on Communications, vol.58, no.3, Mar.2010, pp.956-965.
[9]Shi Y, Hou Y T, "A distributed optimization algorithm for multi-hop cognitive radio networks," In Proc. of the IEEE INFOCOM'2008, Phoenix, AZ, USA, Apr.2008, pp.1292-1300.
[10]Ruan L Z, Lau K N, "Decentralized dynamic hop selection and power control in cognitive multi-hop relay systems," IEEE Transactions on Wireless Communications, vol.9, no.10, October.2010, pp.3024-3030.
[11]Laneman J N and Wornell G W, "Cooperative diversity in wireless networks:efficient protocols and outage behavior," IEEE Transactions on Information Theory, vol.50, no.12, Dec.2004, pp.3062-3080.
[12]Farhadi G and Beaulieu N C, "Fixed relaying versus selective relaying in multi-hop diversity transmission," IEEE Transactions on Wireless Communications, vol.58, no.3, Mar.2010, pp.956-965.
[13]Goldsmith A. Wireless communications, Ith ed. England:Cambridge University Press,2005.
[14]Laneman J N and Wornell G W, "Distributed space-time-coded protocols for exploiting cooperative diversity in wireless networks[J]," IEEE Transactions on Information Theory, vol. 49, no.10, Oct.2003, pp.2414-2425.
[15]盛骤,谢式千,潘承毅等,概率论与数理统计(第3版),高等教育出版社,北京,2001年12月
[16]M. Adams and V. Guillemin, Measure Theory and Probability. Boston, MA:Birkhauser,1996.
[2]Andrea Goldsmith. "Wireless Communication," Cambridge University Press,2005.
[3]Cimini L J. "Advanced Cellular Internet Service (ACIS)," IEEE Communication. Magazine, vol.36, no.10,1998, pp.150-159.
[4]邬贺铨.“对我国通信高技术研究的世纪开局的评述”,电子学报,2004(S1),PP.1-5.
[5]Proakis John G. "Digital Communication (影印版，第3版),"电子工业出版社,1998年.
[6]罗涛,乐光新.“多大线无线通信原理与应用,”北京邮电大学出版社,2005年11月.
[7]虞贵财.“感知无线电系统中的频谱感测技术研究,”博十学位论文,北京邮电大学,2010年4月.
[8]娄佳.“协同认知无线通信系统中感知用户传输性能研究,”博十学位论文,北京邮电大学,2010年5月.
[9]林霏.“无线网络中协同通信技术研究,”博十学位论文,北京邮电大学,2008年6月.
[10]吴伟陵,牛凯.“移动通信原理[M]”电子工业出版社,2005年1月.
[11]Van der Meulen E. "A servey of multi-way channels in information theory," IEEE Transactions on information theory, Jul.1977,23(1) pp.572-584.
[12]Cover T M, Gamal A A E. "Capacity theorems for the relay channel," IEEE Transactions on information theory, Sept.1979,25(5) pp.572-584.
[13]Aggelouand G N, Tafazolh R. "On the relaying capacity of next generation GSM cellular networks," IEEE Personal Communications, vol.8, no.1, Feb.2001, pp.40-47.
[14]Laneman J N. "Cooperative diversity in wireless networks:Algorithms and architectures," Ph.D Thesis, Massachusetts Institute of Technology, Cambridge,MA, August 2002.
[15]Hasna M O, Alouini M-S. "Outage probability of multihop transmissions over Nakagami fading channels," In Proc. of the IEEE ISWC'2002, Sardinia, Italy,Sep.2002, pp.207-208.
[16]Herhold P, Zimmermann E, Fettweis G. "On the performance of cooperative amplify-and-forward relay networks [C]," In Proc Conf Source and Channel Coding,2004, pp.451-458.
[17]Hasna M O, Alouini M-S. "A performance study of dual-hop transmissions with fixed gain relays," IEEE Transactions on Wireless Communications, vol.3, no.6, Nov.2004, pp.1963-1968.
[18]Laneman J N, Tse D N. "Cooperative diversity in wireless networks:Efficient protocols and outage behavior[J]," IEEE Transactions on Information Theory, vol.50, no.12, Dec.2004, pp.3062-3080.
[19]Lin Y, Hasna M O, Alouini M-S. "Average outage duration of multihop communication systems with regenerative relays," IEEE Transactions on Wireless Communications, vol.4, no.4, July.2005, pp.1366-1371.
[20]Hasna M O, Alouini M-S. "End-to-end performance of transmission systems with relays over Rayleigh-fading channel [J]," IEEE Transactions on Wireless Communications, vol.2, no.6, June 2005, pp.2020-2040.
[21]Seddik K G, Sadek A K, Su Wei-feng. "Outage analysis of multi-node amplify-and-forward relay networks[C]," In Proc.the IEEE WCNC'2006, LasVegas, USA, Mar.2006, pp.1184-1188.
[22]A1-Hanbali A, Kherani A A, Groenevelt R, et al. "Impact of mobility on the performance of relaying in ad hoc networks," In Proc. of the IEEE INFOCOM'2006, Barcelona, Spain, Apr.2006, pp:1-12.
[23]Fallahi A, Hossain E, Alfa A S. "QoS and energy trade off in distributed energy-limited mesh/relay networks:a queuing analysis," IEEE Transactions on Parallel and Distributed Systems, vol.17, no.6, Jan.2006, pp.5766-5922.
[24]Ibrahim A S, Sadek A K, Feng S W. "Relay selection in multi-node cooperative communications:When to cooperate and whom to cooperate with?" In Proc. of the IEEE GLOBECOM 2006, San Francisco, USA, Nov.2006, pp.3068-3072.
[25]彭木根,王文博.“协同无线通信原理与应用[M]”，机械工业出版社,2008年10月.
[26]Ian F. Akyidiz, Won-Yeol Lee, Mehmet C. Vuran, shantidev Mohanty. "Next generation/dynamic spectrum access/cognitive radio wireless networks:a survey". Computer Network, Volume 50, Issue 13, September 2006, pp.2127-2159.
[27]周小飞,张宏纲.“认知无线电原理及应用,”北京邮电大学出版社,2007年7月.
[28]谢显中.“感知无线电技术及其应用,”电子工业出版社,2008年4月.
[29]Weiss T. A. and Jondral F. K. "Spectrum pooling:an innovative strategy for the enhancement of spectrum efficiency [J]," IEEE Radio Communication,March 2004, pp. S8-S14.
[30]Haykin S. "Cognitive radio:brain-empowered wireless communications," IEEE Journal on Selected Areas in Communications, vol.23, no.2, Jan.2005, pp.201-220.
[31]Akyildiz I. F., Lee Won-Yeol, Vuran M. C., et al. "NeXt generation/dynamic spectrum access /cognitive radio wireless networks:A survey [J],"Computer Networks, Vol.50,2006, pp.2127-2159.
[32]Ganesan G, Le Y. "Cooperative spectrum sensing in cognitive radio, part I:Two user networks, " IEEE Transactions Wireless Communications, vol.6, no.6, June 2007, pp.2204-2213.
[33]Ganesan G, Le Y. "Cooperative spectrum sensing in cognitive radio, part II:Multiuser networks, " IEEE Transactions Wireless Communications, vol.6, no.6, June 2007, pp.2214-2222.
[34]Simeone O, Spagnolini U, Bar-Ness Y. "Stable throughput of cognitive radios with and without relaying capability," IEEE Transactions Communications, vol.55, no.12, Dec.2007, pp.2351-2360.
[35]Simeone O, Spagnolini U." Cooperation and cognitive radio," In Proc. of the IEEE ICC 2007, Glasgow, Scotland, Dec.2007, pp.6511-6515.
[36]Devroye N, Mitran P, Tarokh V. "Cognitive multiple access networks," In Proc. of the IEEE ISIT'2005, Adelaide, Australia, Sept.2005, pp.57-61.
[37]Devroye N, Mitran P, Tarokh V. "Achievable rates in cognitive radio channel," IEEE Transactions on Information Theory, vol.52, no.5, May 2006, pp.1823-1817.
[38]Devroye N, Mitran P, Tarokh V. "Limits on communications in a cognitive radio channel," IEEE Communications Magazine, vol.44, no.6, June 2006, pp.44-49.
[1]罗涛,乐光新.“多天线无线通信原理与应用,”北京邮电大学出版社,2005.11,pp.3-9.
[2]Mischa Dohler. "Virtual Antenna Arrays, " PhD thesis, King's College London,2003.
[3]FCC. "Spectrum policy task force report," ET Docket No.02-135, Nov 02,2002.
[4]Mitola J. "Cognitive radio:making software radios more personal," IEEE Pers Commnu., 1999,6(4).
[5]Gambini, J, Simeone O, and Spagnolini U, et al. "Cooperative cognitive radios with optimal primary detection and packet acceptance control [C]," Signal Processing Advances in Wireless Communications,2007, pp.1-5.
[6]Gong Xiaowen, Yuan Wei, and Liu Wei, et al. "A Cooperative Relay Scheme for Secondary Communication in Cognitive Radio Networks [C]," In Proc. of the IEEE GLOBECOM'2008, New Orleans, USA,2008, pp.1-6.
[7]Mietzner J, Lampe L, Schober R. "Performance Analysis for a Fully Decentralized Transmit Power Allocation Scheme for Relay-Assisted Cognitive-Radio Systems [C]," In Proc. of the IEEE GLOBECOM'2008, New Orleans, USA,2008, pp.1-6.
[8]Sridharan S, Vishwanath S and Jafar S A, et al. "On the capacity of cognitive relay assisted Gaussian interference channel [C]," in Proc. ISIT,2008, pp.549-553.
[9]Do T, Mark B L. "Cooperative communication with regenerative relays for cognitive radio networks [C]," Annual Conference on Information Sciences and Systems (CISS),2010, pp.1-6.
[10]Lee K, Yener A. "Outage performance of cognitive wireless relay networks[C]," In Proc. of the IEEE GLOBECOM'2006, San Francisco, USA, Dec.2006, pp.6511-6515.
[11]Yue Wenjing, Zheng Baoyu, Meng Qingmin. "Optimal Power Control for Cognitive Relay Networks over Fading Channels [C]," ICFN'10. Second International Conference,2010, pp. 281-285.
[12]Sahin, O, Erkip, E. "Cognitive relaying with one-sided interference [C]," Signals, Systems and Computers,2008 42nd Asilomar Conference,2008, pp.689-694.
[13]Simeone O, Spagnolini U, Bar-Ness Y. "Stable throughput of cognitive radios with and without relaying capability," IEEE Transactions on Communications, vol.55, no.12, Dec. 2007, pp.2351-2360.
[14]FP6 End-to-End Reconfigurability (R2R Ⅱ) Integrated Project(IP), http://www.ntia.doc.gov/ osmhome/allochrt.pdf.
[15]I. F. Akyildiz, Won-Yeol Lee, M. C. Vuran*, et al. "NeXt generation/dynamic spectrum access/cognitive radio wireless networks: A survey [J]," Computer Networks, Vol.50,2006, pp.2127-2159.
[16]T. A. Weiss and F. K. Jondral. "Spectrum pooling:an innovative strategy for the enhancement of spectrum efficiency [J]," IEEE Radio Communication, March 2004, pp. S8-S14.
[17]M. A. McHenry. "NSF spectrum occupancy measurements project summary," In Shared Spectrum Company Report, August 2005.
[18]Q.Zhao and B.Sadler. "A survey of dynamic spectrum access," Signal Processing Magazine, IEEE,vol.24,pp.79-89,May 2007.
[19]陈东.“认知无线电中无线频谱感知技术的研究,”博十学位论文,西安电子科技大学,2009年1月.
[20]L.Xu, R.Tonjes, T.Paila, W.Hansmann,M.Frank, and M.Albrecht. "Driving to the internet: dynamic radio for ip services in vehicular environments," Local Computer Networks,2000. LCN 2000. Proceedings.25th Annual IEEE Conference on, pp.281-289,2000.
[21]D.Hatfield and P.Weiser. "Property rights in spectrum:taking the next step," New Frontiers in Dynamic Spectrum Access Networks,2005. DySPAN 2005.2005 First IEEE International Symposium on, pp.43-55, Nov.2005.
[22]J.Mitola. "Cognitive radio:an integrated agent architecture for software defined radio," Ph.d.dissertation, KTH Royal Institute of Technology, Stockholm,2000.
[23]FCC, "Facilitating Opportunities for Flexible, Eficient Reliable Spectrum Use Employing Cognitive Radio Technologies," ET Docket No.03-322,2003.
[24]F.K. Jondral. "Software-Defined Radio-Basic and Evolution to Cognitive Radio", EURASIP J. Wireless Commun. and Networking,2005.
[25]http://www.ieee802.org/22/.
[26]http://www.winlab.rutgers.edu/pub/docs/focus/Cognitive-Hw.html.
[27]J. Neel, J. Reed. "Game theory implications for cognitive radio design," SDR Forum Workshop on Cognitive Radio, San Francisco, April 10,2008.
[28]Weiss T, Spiering M, Jondral F. "Quality of service in spectrum pooling system," Personal, Indoor and Mobile Radio Commnications(PIMRC 2004), vol.1, Sept 2004, pp.345-349.
[29]Brodersen R W, et al. "Coruvs:a cognitive radio approach for usage of virtual unlicensed spectrum," Berkeley Wireless Research Center (BWRC) White paper,2004.
[30]DAPRA XG WG, The XG Architectural framework V1.0,2003.
[31]DAPRA XG WG, The XG Vision RFC V1.0,2003.
[32]郭彩丽,冯春燕,刘芳芳.“一种认知无线电网络中的新型主动频谱选择算法[J],”西安电子科技大学学报,2008,35(6)：1121-1126.
[33]Yue Wang, Chunyan Feng, Zhimin Zeng, Caili Guo. " A robust and energy efficient cooperative spectrumsensing scheme in cognitive radio networks[C]," IEEE Advanced Communication Technology Conference 2009(ICACT 2009), Feb 2009. pp:640-645.
[34]Sahai A., Hoven N., Tandra R., "Some fundamental limits in cognitive radio," Allerton Conf. on Communications, Control and Computing 2004, October 2004, pp.:1-5.
[35]Urkowitz H., "Energy detection of unknown deterministic signals," Proceedings of the IEEE, Vol.55, No.4, Apr.1967, pp.:523-531.
[36]Digham F., .Alouini M.S., Simon M.K., "On the energy detection of unknown signals over fading channels," Porc, of IEEE International conference on Communications, Vol.55, May 2003, pp.3575-3579.
[37]Oner M. and Jondral F., "Cyclostationarity-based methods for the extraction of the channel allocation information in a spectrum pooling system," Proc. of IEEE Radio and Wireless Conference, Sept.2004, pp.279-282.
[38]FCC, ET Docket No.03-237 Notice of inquiry and notice of proposed Rulemaking, November 2003.
[39]Brown T.X., "An analysis of unlicensed device operation in licensed broadcast service bands," Proc. IEEE International Dynamic Spectrum Access Networks, November 2005, pp. 11-29.
[40]Wolfram Research [Online]. Available:http://scienceworld.Wolfram.com/physics/antenna temperature.html.
[41]C. Raman, R.D. Yates, N.B. Mandayam, "Scheduling variable rate links via a spectrum server," Proc. IEEE DySPAN 2005, November 2005, pp.110-118.
[42]H. Zheng, L. Cao, "Device-centric spectrum management," Proc. IEEE DySPAN 2005, November 2005, pp.56-65.
[43]Zhao Chengzhi, Zou Mingrui, Shen Bin, Kim Bumjung and Kwak Kyungsup, "Cooperative Spectrum Allocation in Centralized Cognitive Networks Using Bipartite Matching," IEEE GLOBECOM 2008.
[44]Mark Felegyhazi, Mario Cagalj, Shirin Saeedi Bidokhti, Jean-Pierre Hubaux, "Non-cooperative Multi-radio Channel Allocation in Wireless Networks," IEEE INFOCOM 2007.
[45]Menon R, Buehrer RM, Reed JH, "Outage probability based comparison of underlay and overlay spectrum sharing techniques," Proc. IEEE DySPAN 2005,2005, pp.01-109.
[46]彭木根,王文博.“协同无线通信原理与应用[M],”机械工业出版社,2008.
[47]Cover T M, Gamal A A E. "Capacity theorems for the relay channel," IEEE Transactions on information theory, vol. IT-25, Sept.1979, pp.572-584.
[48]Cover T M, Thomas J A. "Elements of information theory[M]," New York:Wiley,1991.
[49]Aria Nosratinia, Todd E. Hunter, Ahmadreza Hedayat, "Cooperative Communication in Wireless Networks," IEEE Communications Magazine, October2004, pp.74-80.
[50]Hasna M O, Alouini M-S. "End-to-end performance of transmission systems with relays over Rayleigh fading channel[J]," IEEE Transactions on Wireless Communications, vol.2, no.6, June 2005, pp.2020-2040.
[51]Laneman J N, Tse D N. "Cooperative diversity in wireless networks:Efficient protocols and outage behavior[J]",IEEE Transactions on Information Theory, vol.50, no.12, Dec.2004, pp.3062-3080.
[52]Sendonaris A, Erkip A, Aazhang B. "User cooperation diversity-part I:system description[J]," IEEE Transactions on Communications, vol.51, no.11, Nov.2003, pp.1927-1938.
[53]Sendonaris A, Erkip A, Aazhang B. "User cooperation diversity-part II:implementation aspects and performance analysis[J]," IEEE Transactions on Communications, vol.51, no.11, Nov.2003, pp.1939-1948.
[54]Hunter T E, Nosratinia A. "Cooperation Diversity through Coding," In Proc. of the IEEE ISIT'2002, Lausanne, Switzerland, July 2002, p.220.
[55]Nosratinia A, Hunter T E, Hedayat A. "Cooperative communication in wireless networks," IEEE Transactions on Communication Magazine, vol.42, no.10, Oct.2004, pp.74-80.
[56]Hunter T E, Nosratinia A. "Outage analysis of code cooperation," IEEE Transactions on Information Theory, vol.52, no.2, Feb.2006, pp.375-391.
[57]Laneman J N, Wornell G. "Distributed space-time coded protocols for exploiting cooperative diversity in wireless networks," IEEE Transactions on Information Theory, vol.49, no.10, Oct. 2004, pp.2415-2425.
[58]Stefanov A, Erkip E. " Cooperative space-time coding for wireless networks," IEEE Transactions Communications, vol.53, no.11, Nov.2005, pp.1804-1809.
[59]Hasna M O, Alouini M-S. "Outage probability of multihop transmissions over Nakagami fading channels," In Proc. of the IEEE ISWC 2002, Sardinia, Italy, Sep.2002, pp.207-208.
[60]Lin Y, Hasna M O, Alouini M-S. "Average outage duration of multihop communication systems with regenerative relays," IEEE Transactions on Wireless Communications, vol.4, no.4, July.2005, pp.1366-1371.
[61]Seddik K G, Sadek A K, Su Wei-feng. "Outage analysis of multi-node amplify-and-forward relay networks, " In Proc. the IEEE WCNC'2006, Las Vegas, USA, Mar.2006, pp.1184-1188.
[62]Ibrahim A S, Sadek A K, Feng S W. " Relay selection in multi-node cooperative communications:When to cooperate and whom to cooperate with?" In Proc. of the IEEE GLOBECOM 2006, San Francisco, USA, Nov.2006, pp.3068-3072.
[63]Boyer J, Falconer D D, and Yanikomeroglu H. "Multi-hop diversity in wireless relaying channels," IEEE Transactions on Wireless Communications, vol.52, Oct.2004. pp. 1820-1830。
[64]Boyer J. "Multihop wireless communications channels," Master's thesis, Carleton University, Ottawa, ON, Canada,2001.
[65]Golnaz F, Norman C. B, "Fixed relaying versus selective relaying in multi-hop diversity transmission system," IEEE Transactions on Communications, vol.58, no.3, Mar.2010, pp.956-965.
[66]罗涛,郝建军,乐光新.“多用户协同通信与感知技术,”中兴通信技术,2009年2月.
[67]林霏.“无线网络中协同通信关键技术的研究,”博士学位论文,北京邮电大学,2008年7月.
[68]Simeone O, Spagnolini U, Bar-Ness Y. "Stable throughput of cognitive radios with and without relaying capability[J]," IEEE Transactions Communications, vol.55, no.12, Dec.2007, pp.2351-2360.
[69]Simeone O, Spagnolini U. "Cooperation and cognitive radio[C]," In Proc. ofthe IEEE ICC'2007, Glasgow, Scotland, Dec.2007, pp.6511-6515.
[70]Ganesan G, Le Y. "Cooperative spectrum sensing in cognitive radio, part Ⅰ:Two user networks [J]," IEEE Transactions Wireless Communications, vol.6, no.6, June 2007, pp.2204-2213.
[71]Ganesan G, Le Y. "Cooperative spectrum sensing in cognitive radio, part Ⅱ:Multiuser networks[J]," IEEE Transactions Wireless Communications, vol.6, no.6, June 2007, pp.2214-2222.
[72]Ghasemi A, Sousa E S. "Collaborative spectrum sensing in cognitive radio networks," In Proc. of the IEEE DySPAN'2005, Baltimore, USA, Nov.2005, pp.131-136.
[73]S. M. Mishra, A. Sahai and R. Brodersen. "Cooperative sensing among cognitive radios[C]," IEEE Int. Conf. Commun., Turkey, June 2006, pp.1658-1663.
[74]Qian Chen, Motani M. "Cooperative spectrum sensing strategies for cognitive radio mesh networks [J]," IEEE Journal of Selected Topics in Signal Processing, vol.5, no.1, Feb 2011, pp.56-67.
[75]Yang Han. "Cooperative decode-and-forward relaying for secondary spectrum access," IEEE Transactions Wireless Communications, vol.8, no.10, Oct 2009, pp.4945-4950.
[76]K. Lee and A. Yener. "Outage performance of cognitive wireless relaynetworks," Proc. IEEE GLOBECOM, Nov.2006.
[77]T. Luo and F. Lin. "Multicarrier Modulation and Cooperative Commnication in Multihop Cgonitive Radio Networks," IEEE Wireless Communications, vol.18, no.1, Feb 2011, pp.38-45.
[78]Chunhua Sun and Khaled Ben Letaief. " User Cooperation in Heterogeneous Cognitive Radio Networks with Interference Reduction[J]," ICC 2008 proceedings,2008, pp.3193-3197.
[79]Y. Guo, G. Kang. "Outage performance of relay-assisted cognitive-radio system under spectrum-sharing constraints[J]," Electronics Letters,2010, pp.182-184.
[1]Cabric D, Mishra S M, Brodersen R W. "Implementation issues in spectrum sensing for cognitive radios," In the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers, Vol.1, Nov.2004, pp.772-776.
[2]Hillenbrand J., Weiss T.A., Jondral F.K. "Calculation of detection and false alarm probabilities in spectrum pooling systems," IEEE Communications Letters, Vol.9(4),Apr.2005, pp.349-351.
[3]Ghasemi A., E.S.Sousa. "Collaborative spectrum sensing for opportunistic access in fading environments," In Proc. of 2005 First IEEE International Symposium on New Frontiers in Dynamic Spectrum Access Networks, Nov.2005, pp.131-136.
[4]Ganesan G., Li Ye. "Agility improvement through cooperative diversity in cognitive radio," In Pore. of IEEE Global Telecommunications Conference, Vol.5, Nov.2005, pp.2505-2509.
[5]Ganesan G., Li Ye. "Cooperative spectrum sensing in cogvitive radio networks," In Proc. of First IEEE International Symposium on New Frontiers in Dynamic Spectrum Access Networks, Nov.2005, pp.137-143.
[6]Zhang Q., Andre B.J., Gerard J.M. "A reconfigurable radio architecture for cognitive radio in emergency networks," In Porc, of the 9th European Conference on Wireless Technology, Sept. 2006, pp.35-38.
[7]Y. C. Liang, Y. Zeng, E. C. Y. Peh, and A. T. Hoang, "Sensing throughput tradeoff for cognitive radio networks," IEEE Trans. Wireless Communications, vol.7, no.4, Apr.2008, pp. 1326-1337.
[8]A T Hoang, Y C Liang, D Wong, Y Zeng, and R Zhang. "Opportunistic spectrum access for energy-constrained cognitive radios," IEEE Trans. Wireless Communications, vol.8, no.3, Mar.2009, pp.1206-1211.
[9]J Luo, R S Blum, L J Cimini, L J Greenstein. " Decode-and-forward cooperative diversity with power allocation in wireless network[J]," IEEE Trans. Wireless Communications,2007,6(3), pp.793-799.
[10]林霏,罗涛,乐光新.“不同功率分配与中继位置下协同通信SER性能分析[J],”中国电机工程学报,2008,28(19),pp.101-105.
[11]Simeone O, Spagnolini U, Bar-Ness Y. "Stable throughput of cognitive radios with and without relaying capability[J]," IEEE Trans. Communications,vol.55, no.12, Dec.2007, pp.2351-2360.
[12]Simeone O, Spagnolini U. "Cooperation and cognitive radio[C]," In Proc. of the IEEE ICC'2007, Glasgow, Scotland, Dec.2007, pp.6511-6515.
[13]Ganesan G, Le Y. "Cooperative spectrum sensing in cognitive radio, part Ⅰ:Two user networks[J]," IEEE Trans. Wireless Communications, vol.6, no.6, June 2007, pp.2204-2213.
[14]Ganesan G, Le Y. "Cooperative spectrum sensing in cognitive radio, part Ⅱ:Multiuser networks[J]," IEEE Trans. Wireless Communications, vol.6, no.6, June 2007, pp.2214-2222.
[15]Sahai A, Hoven N, Tandra R. "Some fundamental limits in cognitive radio," Allerton Conf. on Communications, Control and Computing 2004, October 2004, pp.1-5.
[16]Urkowitz H. "Energy detection of unknown deterministic signals," Proceedings of the IEEE, Vol.55, No.4, Apr.1967, pp.523-531.
[17]Digham F, Alouini M S, Simon M K. "On the energy detection of unknown signals over fading channels," Porc. of IEEE International conference on Communications, Vol.55, May 2003, pp.3575-3579.
[18]Gardner W A. "Signal interception:a unifying theoretical framework for feature detection,' IEEE Trans. on Communications, vol.36, No.8, Aug.1998, pp.897-906.
[19]Oner M, and Jondral F. "Cyclostationarity-based methods for the extraction of the channel allocation information in a spectrum pooling system," Proc. of IEEE Radio and Wireless Conference, Sept.2004, pp.279-282.
[20]Yuan Yan, Anxin Li, Kayama, H. "Study on Soft Decision based Cooperative Sensing in Cognitive Radio Network[J]," Vehicular Technology Conference Fall,2009.
[21]J N Laneman, D N C Tse, and G W Wornell. "Cooperative diversity in wireless networks: efficient protocols and outage behavior," IEEE Trans. Information Theory, vol.50, no.12, Dec.2004, pp.3062-3080.
[22]J Luo, R S Blum, L J Cimini, L J Greenstein. "Decode-and-forward cooperative diversity with power allocation in wireless network[J]," IEEE Trans. Wireless Communications,2007,6(3), pp.793-799.
[1]Chunhua Lun and Khaled Ben Letaief. "User Cooperation in Heterogeneous Cognitive Radio Networks with Interference Reduction[J]," ICC 2008 proceedings,2008, pp.3193-3197.
[2]Y. Guo, G. Kang. "Outage performance of relay-assisted cognitive-radio system under spectrum-sharing constraints[J]," Electronics Letters,2010, pp.182-184.
[3]Simeone O, Spagnolini U. "Cooperation and cognitive radio [C]," In Proc. of the IEEE ICC'2007, Glasgow, Scotland, Dec.2007, pp.6511-6515.
[4]Dabora R, Mari'c I, and Goldsmith A. "Relay strategies for interference-forwarding," in IEEE Inf. Th. Workshop, Porto, Portugal, May 2008.
[5]Mari'c I, Dabora R, and Goldsmith A. "On the capacity of the interference channel with a relay," in IEEE Int. Symp. Inf. Theory, Toronto, Canada, Jul.2008.
[6]Mari'c I, Dabora R, and Goldsmith A. "Generalized relaying in the presence of interference," in Asilomar Conference on Signals, Systems and ComLUters, Pacific Grove, CA, Oct.2008.
[7]林霏.“无线网络中协同通信关键技术的研究,”博十学位论文,北京邮电大学,2008年7月.
[8]娄佳.“协同感知无线通信系统中的感知用户传输性能研究,”博士学位论文,北京邮电大学,2010年7月.
[9]Devroye N, Mitran P, and Tarokh V. "Limits on communications in a cognitive radio channel," IEEE Communications Magazine, vol.44, no.6, June 2006, pp.44-49.
[10]Etkin R, Parekh A, Tse D. "Spectrum sharing for unlicensed bands," In Proc. of the IEEE DySPAN'2005, Baltimore, USA, Nov.2005, pp.251-258.
[11]Devroye N, Mitran P, Tarokh V. " Achievable rates in cognitive radio channel,"IEEE Transactions on Information Theory, vol.52, no.5, May 2006, pp.1823-1817.
[12]ZhaoY, AdVe R. "Improving amplify-and-forward relaying networks:optimal power allocation versus selection[J]," Wireless Communieations, IEEE Transactions on.2007,6(8), pp.3114-3123.
[13]Bletsas A, Shin H, Win M. "Outage Optimality of Opportunistic AmPlify-and-Forward Relaying [J]," Communications Letters, IEEE.2007,11(3), pp.261-263.
[14]Sreng V, Yanikomeroglu H, Falconer D. "Relayer selection strategies in cellular networks with Peer-to-Peer relaying[C]," In VTC 2003-Fall. IEEE 58th October 6-9,2003, pp.1949-1953.
[15]Bletsas A, Khisti A, Reed D, et al. "A simple cooperative diversity method based on network path selection[J],"Selected Areas in Communications, IEEE Jounlal on.2006,24(3), pp. 659-672.
[16]K. Lee and A. Yener. "Outage performance of cognitive wireless relaynetworks," Proc. IEEE GLOBECOM, Nov.2006.
[17]J.N.Laneman, D.N.C.Tse, and G.W.Wornell. "Cooperative diversity in wireless networks: efficient protocols and outage behavior[J]," IEEE Trans. on Information Theory, vol.50, no. 12, Dec.2004, pp.3062-3080.
[18]Li Y, Vucetic B, Zhou Z, Dohler M. "Distributed adaptive power allocation for wireless relay networks[J]," IEEE Transactins on Wireless Communications, vol.6,no.3, Mar.2007, pp.948-958.
[19]Souryal M R, Vojcic B R. "Performance of amplify-and-forward and decode-and-forward relaying in Rayleigh fading with turbo codes," In Proc. of the IEEE ICASSP'2005, Adelaide Australia, Mar.2005, pp.14-19.
[20]Weifeng Su, and Xin Liu. "On optimum selection relaying protocols in cooperative wireless networks[J]," IEEE Transactins on Wireless Communications,vol.58, no.1, Jan.2010.
[21]Yonghui Li, Vucetic, B, Zhuo Chen, Jinhong Yuan. "An Improved Relay Selection Scheme with Hybrid Relaying Protocols," In GLOBECOM'07 IEEE,26-30 Nov.2007, pp.3704-3708.
[22]Luo J H, Blum R S, Cimini L, et al. "Power allocation in a transmit diversity system with mean channel gain information[J]," IEEE Communications Letters, vol.9, no.7, July.2005, pp.616-618.
[23]Laneman J N, Wornell G. "Distributed space-time coded protocols for exploiting cooperative diversity in wireless networks [J]," IEEE Trans. on Information Theory, vol.49, no.10, Oct. 2004, pp.2415-2425.
[1]Wu H, Qiao C, Tonguz O K. "A new generation wireless system with integrated cellular and mobile relaying technologies," In Proc. of WAS'2000, Dec.2000, pp.55-62.
[2]Hasna M O, Alouini M-S. "Outage probability of multihop transmissions over Nakagami fading channels," In Proc. of the IEEE ISWC'2002, Sardinia, Italy, Sep.2002, pp.207-208.
[3]Hasna M O, Alouini M S. "A performance study of dual-hop transmissions with fixed gain relays," IEEE Transactions on Wireless Communications, vol.3, no.6, Nov.2004, pp.1963-1968.
[4]Lin Y, Hasna M O, Alouini M-S. "Average outage duration of multihop communication systems with regenerative relays," IEEE Transactions on Wireless Communications, vol.4, no.4, July.2005, pp.1366-1371.
[5]Karagiannidis G K. "Performance bounds of multihop wireless communications with blind relays over generalized fading channels," IEEE Transactions on Wireless Communications, vol.5, no.3, March.2006, pp.498-503.
[6]Boyer J, Falconer D D, and Yanikomeroglu H, "Multi-hop diversity in wireless relaying channels," IEEE Transactions on Wireless Communications, vol.52, Oct.2004, pp. 1820-1830。
[7]Boyer J, "Multihop wireless communications channels," Master's thesis, Carleton University, Ottawa, ON, Canada,2001.
[8]Golnaz F, Norman C. B, "Fixed relaying versus selective relaying in multi-hop diversity transmission system," IEEE Transactions on Communications, vol.58, no.3, Mar.2010, pp.956-965.
[9]Shi Y, Hou Y T, "A distributed optimization algorithm for multi-hop cognitive radio networks," In Proc. of the IEEE INFOCOM'2008, Phoenix, AZ, USA, Apr.2008, pp.1292-1300.
[10]Ruan L Z, Lau K N, "Decentralized dynamic hop selection and power control in cognitive multi-hop relay systems," IEEE Transactions on Wireless Communications, vol.9, no.10, October.2010, pp.3024-3030.
[11]Laneman J N and Wornell G W, "Cooperative diversity in wireless networks:efficient protocols and outage behavior," IEEE Transactions on Information Theory, vol.50, no.12, Dec.2004, pp.3062-3080.
[12]Farhadi G and Beaulieu N C, "Fixed relaying versus selective relaying in multi-hop diversity transmission," IEEE Transactions on Wireless Communications, vol.58, no.3, Mar.2010, pp.956-965.
[13]Goldsmith A. Wireless communications, Ith ed. England:Cambridge University Press,2005.
[14]Laneman J N and Wornell G W, "Distributed space-time-coded protocols for exploiting cooperative diversity in wireless networks[J]," IEEE Transactions on Information Theory, vol. 49, no.10, Oct.2003, pp.2414-2425.
[15]盛骤,谢式千,潘承毅等,概率论与数理统计(第3版),高等教育出版社,北京,2001年12月
[16]M. Adams and V. Guillemin, Measure Theory and Probability. Boston, MA:Birkhauser,1996.