多用户正交差分混沌键控通信系统
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摘要
针对传统差分混沌移位键控(differential chaos shift keying,DCSK)传输速率较低的问题,提出一种多用户正交DCSK通信系统。该系统通过延迟不同时间区分不同信息时隙,每个信息时隙发送N个用户,有效提升其速率。同时采用正交混沌发生器产生两路正交的混沌信号,彻底消除其信号内干扰,提升系统误码性能。该系统从延迟线数目以及用户数两个方面分析了系统误码率和传输速率。推导在加性高斯白噪声和Rayleigh衰落信道下的误码率公式并进行仿真。仿真结果表明,该系统能够有效改善误码性能和提升速率,具有很好的实用价值。
To solve the problem of the low transmission rate of traditional differential chaos shift keying(DCSK),a multiuser orthogonal DCSK communication system is proposed.The proposed system distinguishes different information time slots by delaying different times,sending Nusers in per information time slot to improve its transmission rate.Meanwhile,the orthogonal chaotic generator is used to generate two orthogonal chaotic signals to completely eliminate the intra-signal interference and improve the performance of the bit error rate(BER).In the proposed system,BER and the transmission rate can be analyzed from two aspects:the number of delay lines and the number of users.The BER formula under additive white Gaussian noise and Rayleigh fading channels is derived and simulated.Simulation results show that the system can effectively improve the performance of BER and increase the transmission rate,furthermore it has good practical value.
To solve the problem of the low transmission rate of traditional differential chaos shift keying(DCSK),a multiuser orthogonal DCSK communication system is proposed.The proposed system distinguishes different information time slots by delaying different times,sending Nusers in per information time slot to improve its transmission rate.Meanwhile,the orthogonal chaotic generator is used to generate two orthogonal chaotic signals to completely eliminate the intra-signal interference and improve the performance of the bit error rate(BER).In the proposed system,BER and the transmission rate can be analyzed from two aspects:the number of delay lines and the number of users.The BER formula under additive white Gaussian noise and Rayleigh fading channels is derived and simulated.Simulation results show that the system can effectively improve the performance of BER and increase the transmission rate,furthermore it has good practical value.
引文
[1]赵雅琴,李书营,米雪龙,等.基于STBC技术的DCSK通信系统性能分析[J].系统工程与电子技术,2016,38(1):155-162.ZHAO Y Q,LI S Y,MI X L,et al.Performance analyze for STBC-based DCSK communication system[J].Systems Engineering and Electronics,2016,38(1):155-162.
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[10]YANG H,JIANG G P.High-efficiency differential-chaos-shiftkeying scheme for chaos-based noncoherent communication[J].IEEE Trans.on Circuits&Systems II Express Briefs,2012,59(5):312-316.
[11]SHEN J,RAO W,ZHANG W,et al.An improved repeatedcorrelation delay shift keying modulation scheme for chaotic communication system[C]∥Proc.of the IEEE/CIC International Conference on Communications in China,2016:1-5.
[12]ALBASSAM N N.A new hybrid DCSK-CDSK scheme for chaos based communications[C]∥Proc.of the IEEE International Conference on Information and Communication Systems,2014:1-5.
[13]TALEB F,BENDIMERAD F T,ROVIRAS D.Very high efficiency differential chaos shift keying system[J].IET Communications,2016,10(17):2300-2307.
[14]KADDOUM G,GAGNON F.Design of a high-data-rate differential chaos-shift keying system[J].IEEE Trans.on Circuits&Systems II Express Briefs,2012,59(7):448-452.
[15]LONG N H,QUYEN N X,YEM V V.Design of an improved multi-carrier DCSK system for digital communications[C]∥Proc.of the IEEE International Conference on Recent Advances in Signal Processing,Telecommunications&Computing,2017:211-216.
[16]KADDOUM G.Design and performance analysis of a multiuser OFDM based differential chaos shift keying communication system[J].IEEE Trans.on Communications,2016,64(1):249-260.
[17]LAU F C M,YIP M M,TSE C K,et al.A multiple access technique for differential chaos shift keying[J].IEEE Trans.on Circuits&Systems I Fundamental Theory&Applications,2002,49(1):96-104.
[18]KADDOUM G,RICHARDSON F D,GAGNON F.Design and analysis of a multi-carrier differential chaos shift keying communication system[J].IEEE Trans.on Communications,2013,61(8):3281-3291.
[19]张刚,孟维,张天骐.一种改进型多用户正交差分混沌键控[J].电子技术应用,2015,41(12):76-78.ZHANG G,MENG W,ZHANG T Q.An improved multiple access orthogonal differential chaos shift keying[J].Application of Electronic Technique,2015,41(12):76-78.
[20]HASAN F S.Design and analysis of an OFDM-based short reference quadrature chaos shift keying communication system[J].Wireless Personal Communications,2017(12):1-18.
[21]杨华,蒋国平,段俊毅.无信号内干扰的高效差分混沌键控通信方案[J].通信学报,2015,36(6):88-93.YANG H,JIANG G P,DUAN J Y.High efficiency differential chaos shift keying modulation scheme without intra-signal interference[J].Journal on Communications,2015,36(6):88-93.
[2]KADDOUM G,SOUJERI E,NIJSURE Y.Design of a short reference noncoherent chaos-based communication systems[J].IEEE Trans.on Communications,2016,64(2):680-689.
[3]XU W,WANG L,CHEN G.Performance of DCSK cooperative communication systems over multipath fading channels[J].IEEE Trans.on Circuits&Systems I Regular Papers,2011,58(1):196-204.
[4]ESCRIBANO F J,KADDOUM G,WAGEMAKERS A,et al.Design of a new differential chaos-shift-keying system for continuous mobility[J].IEEE Trans.on Communications,2016,64(5):2066-2078.
[5]KADDOUM G,TRAN H V,LONG K,et al.Design of simultaneous wireless information and power transfer scheme for short reference DCSK communication systems[J].IEEE Trans.on Communications,2017,65(1):431-443.
[6]DAWA M,KADDOUM G,SATTAR Z.A generalized lower bound on the bit-error-rate of DCSK systems over multi-path Rayleigh fading channels[J].IEEE Trans.on Circuits&Systems II Express Briefs,2017,65(3):321-325.
[7]DUAN J Y,JIANG G P,Yang H.Reference-adaptive CDSK:an enhanced version of correlation delay shift keying[J].IEEE Trans.on Circuits&Systems II Express Briefs,2015,62(1):90-94.
[8]HERCEG M,MILICEVIV K,MATIC T.Correlation-multi-delay-shift-keying for chaos based communications[J].Wireless Personal Communications,2016,88(2):283-294.
[9]KADDOUM G,SOUJERI E.NR-DCSK:a noise reduction differential chaos shift keying system[J].IEEE Trans.on Circuits&Systems II Express Briefs,2016,63(7):648-652.
[10]YANG H,JIANG G P.High-efficiency differential-chaos-shiftkeying scheme for chaos-based noncoherent communication[J].IEEE Trans.on Circuits&Systems II Express Briefs,2012,59(5):312-316.
[11]SHEN J,RAO W,ZHANG W,et al.An improved repeatedcorrelation delay shift keying modulation scheme for chaotic communication system[C]∥Proc.of the IEEE/CIC International Conference on Communications in China,2016:1-5.
[12]ALBASSAM N N.A new hybrid DCSK-CDSK scheme for chaos based communications[C]∥Proc.of the IEEE International Conference on Information and Communication Systems,2014:1-5.
[13]TALEB F,BENDIMERAD F T,ROVIRAS D.Very high efficiency differential chaos shift keying system[J].IET Communications,2016,10(17):2300-2307.
[14]KADDOUM G,GAGNON F.Design of a high-data-rate differential chaos-shift keying system[J].IEEE Trans.on Circuits&Systems II Express Briefs,2012,59(7):448-452.
[15]LONG N H,QUYEN N X,YEM V V.Design of an improved multi-carrier DCSK system for digital communications[C]∥Proc.of the IEEE International Conference on Recent Advances in Signal Processing,Telecommunications&Computing,2017:211-216.
[16]KADDOUM G.Design and performance analysis of a multiuser OFDM based differential chaos shift keying communication system[J].IEEE Trans.on Communications,2016,64(1):249-260.
[17]LAU F C M,YIP M M,TSE C K,et al.A multiple access technique for differential chaos shift keying[J].IEEE Trans.on Circuits&Systems I Fundamental Theory&Applications,2002,49(1):96-104.
[18]KADDOUM G,RICHARDSON F D,GAGNON F.Design and analysis of a multi-carrier differential chaos shift keying communication system[J].IEEE Trans.on Communications,2013,61(8):3281-3291.
[19]张刚,孟维,张天骐.一种改进型多用户正交差分混沌键控[J].电子技术应用,2015,41(12):76-78.ZHANG G,MENG W,ZHANG T Q.An improved multiple access orthogonal differential chaos shift keying[J].Application of Electronic Technique,2015,41(12):76-78.
[20]HASAN F S.Design and analysis of an OFDM-based short reference quadrature chaos shift keying communication system[J].Wireless Personal Communications,2017(12):1-18.
[21]杨华,蒋国平,段俊毅.无信号内干扰的高效差分混沌键控通信方案[J].通信学报,2015,36(6):88-93.YANG H,JIANG G P,DUAN J Y.High efficiency differential chaos shift keying modulation scheme without intra-signal interference[J].Journal on Communications,2015,36(6):88-93.