一种盲波束赋形与置零新算法
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摘要
针对随着移动终端和业务的持续发展,企业级WLAN中采用传统的AP部署方式和信道竞争协议难以满足日益增长的吞吐量的需求的问题,本文提出了一种新的盲波束赋形与置零算法,该算法能够使得多个终端在同一时隙中进行传输,在有效提高信道利用率的前提下,同时较好地解决了通信的干扰问题,实验结果表明,本文提出的算法与传统的信道竞争协议和AP部署方式相比,能够有效减少开销并显著提高终端的吞吐率。
With the continuous development of mobile terminals and business,in enterprise WLAN,user demand for throughput is gradually increasing.The traditional way of AP deployment and channel competition protocol can not satisfy the increasing communication demand.Therefore,many new methods have been put forward,such as interference alignment and combined beam forming.However,the use of these methods has certain limits and it is difficult to achieve good effect in actual use.This paper proposes a blind beam forming and nulling algorithm.This algorithm allows multiple terminals to transmit at the same time slot,on the premise of effectively improving the channel utilization rate,and better solving the problem of the interference of communication.Experimental results show that,compared with the traditional way of channel competition protocol and AP deployment,the proposed algorithm can effectively reduce the cost and improve the throughput of the terminal.
With the continuous development of mobile terminals and business,in enterprise WLAN,user demand for throughput is gradually increasing.The traditional way of AP deployment and channel competition protocol can not satisfy the increasing communication demand.Therefore,many new methods have been put forward,such as interference alignment and combined beam forming.However,the use of these methods has certain limits and it is difficult to achieve good effect in actual use.This paper proposes a blind beam forming and nulling algorithm.This algorithm allows multiple terminals to transmit at the same time slot,on the premise of effectively improving the channel utilization rate,and better solving the problem of the interference of communication.Experimental results show that,compared with the traditional way of channel competition protocol and AP deployment,the proposed algorithm can effectively reduce the cost and improve the throughput of the terminal.
引文
[1]Adib F,Kumar S,Aryan O,et al.Interference alignment by motion[C]∥Proc of ACM Mobi Com,2013.
[2]Annapureddy V S,El Gamal A,Veeravalli V V.Degrees of freedom of interference channels with CoMP transmission and reception[J].IEEE Transactions on Information Theory,2012,58(9):5740-5760.
[3]丁君,王珺,郭陈江,等.一种对任意线阵天线的主波束赋形方法[J].电波科学学报,2004,19(5):89-95.Ding Jun,Wang Jun,Guo Chen-jiang,et al.Mainlobe shaping method for arbitrary arrays[J].Chinese Journal of Radio Science,2004,19(5):89-95.
[4]Bansal T,Zhou W J,Srinivasan K,et al.RobinHood:Sharing the happiness in a wireless jungle[C]∥In Proc of ACM HotMobile,Miami,USA,2014:1-6.
[5]Bansal T,Chen B,Sinha P,et al.Symphony:Cooperative packet recovery over the wired backbone in enterprise WLANs[C]∥Proceedings of the 19th Annual International Conference on Mobile Computer&Networking,2013:351-362.
[6]罗巍,郭爱煌,谭维锴.LTE-A中的SLNR联合校准多用户多流波束赋形方案[J].系统工程与电子技术,2012,34(11):2351-2354.Luo Wei,Guo Ai-huang,TAN Wei-kai.SLNR-based channel calibration multi-user multi-stream beamforming for LTE-A[J].Systems Engineering and Electronics,2012,34(11):2351-2354.
[7]Cadambe V R,Jafar S A.Interference alignment and the degrees of freedom for the K user interference channel[J].IEEE Transactions on Information Theory,2008,54(8):3425-3441.
[8]Geng Q,Kannan S,Viswanath P.Interactive interference alignment[DB/OL].[2013-06-17].http:∥arxiv.org/pdf/1211.0985vl.pdf.
[9]贾向东,李凡,郑建光.智能天线基带幅度加权波束赋形及其CDMA应用性能分析[J].电波科学学报,2010,25(3):505-512.Jia Xiang-dong,LI Fan,Zhen Jian-guang.Beamforming scheme for smart antenna by using baseband amplitude weighing and performance analysis in CDMA[J].Chinese Journal of Radio Science,2010,25(3):505-512.
[10]Gesbert D,Kountouris M,Heath R,et al.Shifting the MIMO paradigm[J].Signal Processing Magazine,IEEE,2007,24(5):36-46.
[11]黄莹,吕刚明,朱世华.接收矢量估计辅助的协调波束赋形算法[J].通信学报,2014,35(2):194-201.Huang Ying,Lyu Gang-ming,Zhu Shi-hua.Coordinated beamforming algorithm assisted byreceive beamforming vector estimation[J].Journal on Communications,2014,35(2):194-201.
[12]董可,廖学文,朱世华.毫米波通信系统中利用随机逼近的波束赋形算法[J].西安交通大学学报,2011,45(10):72-76.Dong Ke,Liao Xue-wen,Zhu Shi-hua.Beam-forming in millimeter-wave radio system via stochastic approximation[J].Journal of Xi'an Jiaotong University,2011,45(10):72-76.
[13]吴文君,王文博,王健全.多点协同系统中的协同波束赋形干扰抑制[J].北京邮电大学学报,2011,34(3):103-107.Wu Wen-jun,Wang Wen-bo,Wang Jian-quan.Coordinated beamforming interference suppression in coordinated multi-point systems[J].Journal of Beijing University of Posts and Telecommunications,2011,34(3):103-107.
[14]Gowda M,Sen S,Roy Choudhury R,et al.Cooperative Packet Recovery in Enterprise WLANs[J].IEEE InfoCom,2013,12(11):1348-1356.
[15]Jafar S A.Interference Alignment:A New Look at Signal Dimensions in a Communication Network[M].Boston:Now Publishers,2011.
[2]Annapureddy V S,El Gamal A,Veeravalli V V.Degrees of freedom of interference channels with CoMP transmission and reception[J].IEEE Transactions on Information Theory,2012,58(9):5740-5760.
[3]丁君,王珺,郭陈江,等.一种对任意线阵天线的主波束赋形方法[J].电波科学学报,2004,19(5):89-95.Ding Jun,Wang Jun,Guo Chen-jiang,et al.Mainlobe shaping method for arbitrary arrays[J].Chinese Journal of Radio Science,2004,19(5):89-95.
[4]Bansal T,Zhou W J,Srinivasan K,et al.RobinHood:Sharing the happiness in a wireless jungle[C]∥In Proc of ACM HotMobile,Miami,USA,2014:1-6.
[5]Bansal T,Chen B,Sinha P,et al.Symphony:Cooperative packet recovery over the wired backbone in enterprise WLANs[C]∥Proceedings of the 19th Annual International Conference on Mobile Computer&Networking,2013:351-362.
[6]罗巍,郭爱煌,谭维锴.LTE-A中的SLNR联合校准多用户多流波束赋形方案[J].系统工程与电子技术,2012,34(11):2351-2354.Luo Wei,Guo Ai-huang,TAN Wei-kai.SLNR-based channel calibration multi-user multi-stream beamforming for LTE-A[J].Systems Engineering and Electronics,2012,34(11):2351-2354.
[7]Cadambe V R,Jafar S A.Interference alignment and the degrees of freedom for the K user interference channel[J].IEEE Transactions on Information Theory,2008,54(8):3425-3441.
[8]Geng Q,Kannan S,Viswanath P.Interactive interference alignment[DB/OL].[2013-06-17].http:∥arxiv.org/pdf/1211.0985vl.pdf.
[9]贾向东,李凡,郑建光.智能天线基带幅度加权波束赋形及其CDMA应用性能分析[J].电波科学学报,2010,25(3):505-512.Jia Xiang-dong,LI Fan,Zhen Jian-guang.Beamforming scheme for smart antenna by using baseband amplitude weighing and performance analysis in CDMA[J].Chinese Journal of Radio Science,2010,25(3):505-512.
[10]Gesbert D,Kountouris M,Heath R,et al.Shifting the MIMO paradigm[J].Signal Processing Magazine,IEEE,2007,24(5):36-46.
[11]黄莹,吕刚明,朱世华.接收矢量估计辅助的协调波束赋形算法[J].通信学报,2014,35(2):194-201.Huang Ying,Lyu Gang-ming,Zhu Shi-hua.Coordinated beamforming algorithm assisted byreceive beamforming vector estimation[J].Journal on Communications,2014,35(2):194-201.
[12]董可,廖学文,朱世华.毫米波通信系统中利用随机逼近的波束赋形算法[J].西安交通大学学报,2011,45(10):72-76.Dong Ke,Liao Xue-wen,Zhu Shi-hua.Beam-forming in millimeter-wave radio system via stochastic approximation[J].Journal of Xi'an Jiaotong University,2011,45(10):72-76.
[13]吴文君,王文博,王健全.多点协同系统中的协同波束赋形干扰抑制[J].北京邮电大学学报,2011,34(3):103-107.Wu Wen-jun,Wang Wen-bo,Wang Jian-quan.Coordinated beamforming interference suppression in coordinated multi-point systems[J].Journal of Beijing University of Posts and Telecommunications,2011,34(3):103-107.
[14]Gowda M,Sen S,Roy Choudhury R,et al.Cooperative Packet Recovery in Enterprise WLANs[J].IEEE InfoCom,2013,12(11):1348-1356.
[15]Jafar S A.Interference Alignment:A New Look at Signal Dimensions in a Communication Network[M].Boston:Now Publishers,2011.