多用户正交相关延迟键控方案性能分析
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摘要
为了改善混沌信号的传输性能,在相关延迟移位键控(CDSK)方案和多载波相关延迟移位键控(MC-CDSK)方案的基础上,提出一种多用户正交相关延迟移位键控(MU-OCDSK)方案。该方案利用多载波对混沌信号进行调制,得到的结果相对于CDSK,不仅有更高的频谱效率,而且误码率也得到了一定的改善。对该方案进行了理论仿真和蒙特卡洛仿真,结果表明相对于MC-CDSK,该方案不仅提高了1倍的传输速率,而且改善了误码率;且理论仿真和蒙特卡罗仿真结果一致。
In order to improve the transmission performance of chaotic signals, a Multi-User Orthogonal Correlation Delay Shift Keying(MU-OCDSK) scheme was proposed based on Correlation Delay Shift Keying(CDSK) scheme and Multi-Carrier Correlation Delay Shift Keying(MC-CDSK) scheme. The multi-carrier was used to modulate chaotic signals. Compared with CDSK, the proposed scheme not only has higher spectral efficiency, but also improves bit error rate. Theoretical simulation and Monte Carlo simulation show that compared with MC-CDSK, the proposed scheme not only doubles the transmission rate, but also improves the bit error rate. The results of theoretical simulation and Monte Carlo simulation are consistent.
In order to improve the transmission performance of chaotic signals, a Multi-User Orthogonal Correlation Delay Shift Keying(MU-OCDSK) scheme was proposed based on Correlation Delay Shift Keying(CDSK) scheme and Multi-Carrier Correlation Delay Shift Keying(MC-CDSK) scheme. The multi-carrier was used to modulate chaotic signals. Compared with CDSK, the proposed scheme not only has higher spectral efficiency, but also improves bit error rate. Theoretical simulation and Monte Carlo simulation show that compared with MC-CDSK, the proposed scheme not only doubles the transmission rate, but also improves the bit error rate. The results of theoretical simulation and Monte Carlo simulation are consistent.
引文
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[8] QUYEN N X,PHAM C K.Quadrature multi-carrier DCSK:a high-efficiency scheme for radio communications[C]// Proceedings of the 2017 International Conference on Advanced Technologies for Communications.Piscataway,NJ:IEEE,2017:186-191.
[9] QUYEN N X.On the design of a multi-carrier correlation delay-shift keying system[J].Physical Communication,2017,22(22):49-57.
[10] KADDOUM G,GAGNON F,RICHARDSON F D.Design of a secure multi-carrier DCSK system[C]// Proceedings of the 2012 International Symposium on Wireless Communication Systems.Piscataway,NJ:IEEE,2012:964-968.
[11] KADDOUM G,SHOKRANEH F.Analog network coding for multi-user multi-carrier differential chaos shift keying communication system[J].IEEE Transactions on Wireless Communications,2015,14(3):1492-1505.
[12] LONG N H,QUYEN N X,YEM V V.Design of an improved multi-carrier DCSK system for digital communications[C]// Proceedings of the 2017 International Conference on Recent Advances in Signal Processing,Telecommunications & Computing.Piscataway,NJ:IEEE,2017:211-216.
[13] YANG H,JIANG G P,TANG W K S,et al.Multi-carrier differential chaos shift keying system with subcarriers allocation for noise reduction[J].IEEE Transactions on Circuits & Systems II:Express Briefs,2018,65(11):1733-1737.
[14] DUAN J Y,YANG H.Phase-orthogonality CDSK:a reliable and effective chaotic communication scheme[J].IET Communications,2018,12(9):1116-1122.
[15] QUYEN N X.Multi-carrier differential chaos-shift keying with repeated spreading sequence[J].Journal of Communications & Networks,2018,20(3):299-308.
[2] RUSHFORTH C K.Transmitted-reference techniques for random or unknown channels[J].IEEE Transactions on Information Theory,1964,10(1):39-42.
[3] QUYEN N X,DUONG T Q,NALLANATHAN A.Modelling,analysis and performance comparison of two direct sampling DCSK receivers under frequency non-selective fading channels[J].IET Communications,2016,10(11):1263-1272.
[4] YANG H,JIANG G P.Simple intra-signal-interference removing detector for HE-DCSK[J].The Journal of China Universities of Posts and Telecommunications,2013,20(6):102-108.
[5] COULON M,ROVIRAS D.Multi-user adaptive receivers for a multiple-access system based on random permutations on time-varying frequency-selective channels with unknown delays and coefficients[J].IET Communications,2012,6(11):1562-1572.
[6] KADDOUM G,RICHARDSON F D,GAGNON F.Design and analysis of a multi-carrier differential chaos shift keying communication system[J].IEEE Transactions on Communications,2013,61(8):3281-3291.
[7] KADDOUM G.Design and performance analysis of a multiuser OFDM based differential chaos shift keying communication system[J].IEEE Transactions on Communications,2016,64(1):249-260.
[8] QUYEN N X,PHAM C K.Quadrature multi-carrier DCSK:a high-efficiency scheme for radio communications[C]// Proceedings of the 2017 International Conference on Advanced Technologies for Communications.Piscataway,NJ:IEEE,2017:186-191.
[9] QUYEN N X.On the design of a multi-carrier correlation delay-shift keying system[J].Physical Communication,2017,22(22):49-57.
[10] KADDOUM G,GAGNON F,RICHARDSON F D.Design of a secure multi-carrier DCSK system[C]// Proceedings of the 2012 International Symposium on Wireless Communication Systems.Piscataway,NJ:IEEE,2012:964-968.
[11] KADDOUM G,SHOKRANEH F.Analog network coding for multi-user multi-carrier differential chaos shift keying communication system[J].IEEE Transactions on Wireless Communications,2015,14(3):1492-1505.
[12] LONG N H,QUYEN N X,YEM V V.Design of an improved multi-carrier DCSK system for digital communications[C]// Proceedings of the 2017 International Conference on Recent Advances in Signal Processing,Telecommunications & Computing.Piscataway,NJ:IEEE,2017:211-216.
[13] YANG H,JIANG G P,TANG W K S,et al.Multi-carrier differential chaos shift keying system with subcarriers allocation for noise reduction[J].IEEE Transactions on Circuits & Systems II:Express Briefs,2018,65(11):1733-1737.
[14] DUAN J Y,YANG H.Phase-orthogonality CDSK:a reliable and effective chaotic communication scheme[J].IET Communications,2018,12(9):1116-1122.
[15] QUYEN N X.Multi-carrier differential chaos-shift keying with repeated spreading sequence[J].Journal of Communications & Networks,2018,20(3):299-308.