基于改进型Logistic混沌序列的SPC-TDCS多址接入研究
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摘要
为提高变换域通信系统多址接入性能,降低系统误比特率,提出基于改进型Logistic混沌序列的变换域扩频编码通信系统。利用扩频序列优选原则,选取改进型Logistic混沌序列作为扩频序列,对m序列产生的随机相位矢量进行相位编码形成扩频基函数的扩频随机相位矢量。仿真结果表明,该扩频基函数具有更好的随机性,产生的扩频随机相位矢量互(自)相关性能优于传统基函数产生的随机相位矢量;在2个用户和多用户条件下,其信噪比增益和误比特性能都要优于传统基函数和基于Gold序列的扩频基函数,显著提高系统抗干扰性能,能更好地实现TDCS多址接入。
To improve the multiple access performance of Transform Domain Communication System,and reduce the bit error rate of system,SPC-TDCS(Spread Phase Coding based TDCS)is proposed based on modified Logistic chaotic sequence.Taking modified Logistic chaotic sequence as a spread sequence in accordance with the principle of the optimized sequence,the random phase vector generated by m sequence is utilized by phase encoding vector to form spread random phase vector(SRPV).The simulation results show that the spread basic function has still more randomness,and the generated SRPV is superior in relative performance to the traditional random phase vector.No matter in the condition of single-user or multi?users,the spread basic function based on modified Logistic chaotic sequence(SBF-ML)has an improved gained SNR,and its performance is better than that of the traditional basic function and the spread basic function based Gold sequence.By doing so,this significantly enhances anti-jamming capability and realizes further TDCS multiple access capability.
To improve the multiple access performance of Transform Domain Communication System,and reduce the bit error rate of system,SPC-TDCS(Spread Phase Coding based TDCS)is proposed based on modified Logistic chaotic sequence.Taking modified Logistic chaotic sequence as a spread sequence in accordance with the principle of the optimized sequence,the random phase vector generated by m sequence is utilized by phase encoding vector to form spread random phase vector(SRPV).The simulation results show that the spread basic function has still more randomness,and the generated SRPV is superior in relative performance to the traditional random phase vector.No matter in the condition of single-user or multi?users,the spread basic function based on modified Logistic chaotic sequence(SBF-ML)has an improved gained SNR,and its performance is better than that of the traditional basic function and the spread basic function based Gold sequence.By doing so,this significantly enhances anti-jamming capability and realizes further TDCS multiple access capability.
引文
[1]RADCLIFFE Rodney A.Design and Simulation of a Transform Domain Communication System[D].Ohio:Air Force Institute of Technology,1996.
[2]BERLEMANN L,MANGOLD S.Cognitive Radio and Dynamic Spectrum Access[M].New Jersey:John Wiley and Sons,2009.
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[6]SU Hu.TDCS-Based Cognitive Radio Networks with Multiuser Interference Avoidance[J].IEEE Transaction on Communication,2013,61(12):18-22.
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[14]王舒,达新宇,褚振勇,等.一种新的TDCS基函数随机相位产生方法及性能分析[J].重庆邮电大学学报:自然科学版,2014,12(01):12-16.WANG Shu,DA Xinyu,CHU Zhenyong,et al.A New Method of Pseudorandom Phase Generation of Basis Function in TDCS and Its Performance Analysis[J].Journal of Chongqing University of Posts and Telecommunications:Natural Science Edition,2014,12(1):12-16.(in Chinese)
[15]BEARD T W,TEMPLE M A,MILLER J O,et al.Using Genetic Algorithms for Spectrally Modulated Spectrally Encoded Waveform Design[C]//International Waveform Diversity and Design Conference.Pisa,Italy:IEEE,2007:265-269.
[16]YANG Zeyi,TAO Ran,WANG Yue,et al.A Novel MultiCarrier Order Division Multi-Access Communication System Based on TDCS with Fractional Fourier Transform Scheme[J].Wireless Personal Communications,2014,79(2):1301-1320.
[17]李正刚,任清华,赵峰.频谱编码、频谱调制及其在变换域通信中的应用[J].通信技术,2013,41(11):4-5,53-54.LI Zhenggang,REN Qinghua,ZHAO Feng.Application of Spectrally Modulation,Spectrally Encoded Theory in Transform Domain Communication System[J].Communications Technology,2013,41(11):4-5,53-54.(in Chinese)
[18]HU S,GUAN Y L,BI G,et al.Improved Spectrum Efficiency for Transform Domain Communication System[C]//Wireless and Optical Communication Conference.Chongqing:IEEE,2013:18-22.
[2]BERLEMANN L,MANGOLD S.Cognitive Radio and Dynamic Spectrum Access[M].New Jersey:John Wiley and Sons,2009.
[3]MEXTORF Henning,KNOCHEL Reinhard.Simultaneous Measurement of Multiple Impulse Responses with A Single Receiver[C]//IEEE MTT-S International Microwave Symposium Digest.Seattle,WA:IEEE,2013:1-3.
[4]SUN Haixin,BI Guoan,GUAN Yongliang,et al.Novel Pseudorandom Phase Generation in Transform Domain Communication Systems[C]//Proceeding of International Conference on Innovation in Information Technology.Abu Dhabi:IEEE,2011:18-22.
[5]孙海欣,石要武,于晓辉.基于扩频相位编码的变换域通信系统多址接入能力[J].吉林大学学报:工学版,2013,43(1):223-228.SUN Haixin,SHI Yaowu,YU Xiaohui.Multiple Access Capability for Spread Coding Based Transform Domain Communication Systems[J].Journal of Jilin University:Engineering and Techonology Edition,2013,43(1):223-228.(in Chinese)
[6]SU Hu.TDCS-Based Cognitive Radio Networks with Multiuser Interference Avoidance[J].IEEE Transaction on Communication,2013,61(12):18-22.
[7]张琪,郑君里,简相超.采用混沌扩频序列的异步码分多址通信系统仿真[J].清华大学学报:自然科学版,2002,42(7):901-904.ZHANG Qi,ZHENG Junli,JIAN Xiangchao.A-CDMA System Simulation with Chaotic Spreading Sequences[J].Journal of Tsinghua University:Science and Technology,2002,42(7):901-904.(in Chinese)
[8]史军,迟勇钢,张乃通.变换域通信系统:原理、技术与发展趋势[J].南京邮电大学学报:自然科学版,2009,29(1):87-94.SHI Jun,CHI Yonggang,ZHANG Naitong.Principle Technology and Tendency of Transform Domain Communication System[J].Journal of Nanjing University of Posts and Telecommunications:Natural Science Edition,2009,29(1):87-94.(in Chinese)
[9]余振标,冯久超.一种混沌扩频序列的产生方法及其优选算[J].物理学报,2008,57(3):1409-1415.YU Zhenbiao,FENG Jiuchao.A Method for Generating Chaotic Spread-Spectrum Sequences and Their Optimized Selection Algorithm[J].Acta Physica Sinica,2008,57(3):1409-1415.(in Chinese)
[10]凌聪,孙庆庚.Logistic映射扩频序列相关分布[J].电子学报,1999,27(1):140-141.LING Cong,SUN Qinggeng.Correlative Distribution of Logistic Map Spreading Sequences[J].Acta Electronica Sinica,1999,27(1):140-141.(in Chinese)
[11]任清华,李正刚.变换域通信系统及抗干扰性能仿真[J].空军工程大学学报:自然科学版,2009,10(2):86-90.REN Qinghua,LI Zhenggang.Transform Domain Communication System and Anti-Jamming Performance Simulation[J].Journal of Air Force Engineering University:Natural Science Edition,2009,10(2):86-90.(in Chinese)
[12]何智青.变换域通信系统设计、建模与仿真研究[D].西安:西北工业大学,2003.HE Zhiqing.The Transform Domain Communication System Design,Modeling and Simulations[D].Xi′an:Northweste Polytechinical University,2003.(in Chinese)
[13]谢铁城,达新宇,褚振勇,等.采用时频分析的变换域通信系统基函数设计[J].西安交通大学学报,2012,46(6):42-47.XIE Tiecheng,DA Xinyu,CHU Zhenyong,et al.Design of Basis Function in Transform Domain Communication System Using Time-Frequency Analysis Technique[J].Journal of Xi′an Jiaotong University,2012,46(6):42-47.(in Chinese)
[14]王舒,达新宇,褚振勇,等.一种新的TDCS基函数随机相位产生方法及性能分析[J].重庆邮电大学学报:自然科学版,2014,12(01):12-16.WANG Shu,DA Xinyu,CHU Zhenyong,et al.A New Method of Pseudorandom Phase Generation of Basis Function in TDCS and Its Performance Analysis[J].Journal of Chongqing University of Posts and Telecommunications:Natural Science Edition,2014,12(1):12-16.(in Chinese)
[15]BEARD T W,TEMPLE M A,MILLER J O,et al.Using Genetic Algorithms for Spectrally Modulated Spectrally Encoded Waveform Design[C]//International Waveform Diversity and Design Conference.Pisa,Italy:IEEE,2007:265-269.
[16]YANG Zeyi,TAO Ran,WANG Yue,et al.A Novel MultiCarrier Order Division Multi-Access Communication System Based on TDCS with Fractional Fourier Transform Scheme[J].Wireless Personal Communications,2014,79(2):1301-1320.
[17]李正刚,任清华,赵峰.频谱编码、频谱调制及其在变换域通信中的应用[J].通信技术,2013,41(11):4-5,53-54.LI Zhenggang,REN Qinghua,ZHAO Feng.Application of Spectrally Modulation,Spectrally Encoded Theory in Transform Domain Communication System[J].Communications Technology,2013,41(11):4-5,53-54.(in Chinese)
[18]HU S,GUAN Y L,BI G,et al.Improved Spectrum Efficiency for Transform Domain Communication System[C]//Wireless and Optical Communication Conference.Chongqing:IEEE,2013:18-22.