多用户降噪差分混沌键控通信方案
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摘要
传统多用户差分混沌键控主要缺点是误码率差,该文提出一种多用户降噪差分混沌键控(MU-NRDCSK)通信方案。在发射端,发送M/P长度混沌序列,复制P次后作为参考信号,所有用户共用同一参考信号,信息信号延迟不同的时间来区分用户。在接收端,将接收到的信号通过滑动平均滤波器平均,再与其不同时间延迟后的信号进行相关。该方案通过降低噪声项的方差来提高系统误码性能。文中推导了该方案在加性高斯白噪声(AWGN)信道和Rayleigh信道下的理论误码率公式并进行了蒙特卡洛仿真。理论分析和仿真结果表明,理论公式与仿真结果能较好地吻合,MU-NRDCSK方案能较好地提高系统误码性能,在混沌通信领域具有很好的发展前景与研究价值。
One of the major drawbacks of the conventional Multiuser Differential Chaos Shift Keying is the poor Bit Error Rate(BER), a MultiUser Noise Reduction Differential Chaos Shift Keying(MU-NRDCSK) system is proposed. At the transmitter, M/P chaotic samples are transmitted and then duplicated P times as a reference signal, all users share the same reference signal, and information signals are delayed by different times to distinguish different users. At the receiver, the received signal is averaged by a moving average filter, and then the resultant filtered signal is correlated to different time-delated replica. The scheme can enhance the performance of BER by reducing the variance of noise terms in the system. The theoretical BER formula of this new scheme is derived in Additive White Gaussian Noise(AWGN) channel and Rayleigh channel. Theoretical analysis and the simulation results show that the theoretical formula and the simulation result are in good agreement. The MU-NRDCSK scheme can enhance the performance of BER better and has good development prospects and research value in the chaotic communication field.
One of the major drawbacks of the conventional Multiuser Differential Chaos Shift Keying is the poor Bit Error Rate(BER), a MultiUser Noise Reduction Differential Chaos Shift Keying(MU-NRDCSK) system is proposed. At the transmitter, M/P chaotic samples are transmitted and then duplicated P times as a reference signal, all users share the same reference signal, and information signals are delayed by different times to distinguish different users. At the receiver, the received signal is averaged by a moving average filter, and then the resultant filtered signal is correlated to different time-delated replica. The scheme can enhance the performance of BER by reducing the variance of noise terms in the system. The theoretical BER formula of this new scheme is derived in Additive White Gaussian Noise(AWGN) channel and Rayleigh channel. Theoretical analysis and the simulation results show that the theoretical formula and the simulation result are in good agreement. The MU-NRDCSK scheme can enhance the performance of BER better and has good development prospects and research value in the chaotic communication field.
引文
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[16]LAU F C M,YIP M M,TSE C K,et al.A multiple access technique for differential chaos shift keying[J].International Journal of Innovative Technology&Exploring Engineering,2013,49(1):96-104.doi:10.1109/81.974883.
[17]XU Weikai,WANG Lin,and KOLUMBAN G.A novel differential chaos shift keying modulation scheme[J].International Journal of Bifurcation&Chaos,2011,21(3):799-814.doi:10.1142/S0218127411028829.
[18]TALEB F,BENDIMERAD F T,and ROVIRASR D.Very high efficiency differential chaos shift keying system[J].IETCommunications,2016,10(17):2300-2307.doi:10.1049/ietcom.2016.0411.
[19]BAI Chao,REN Haipeng,GREBOGI C,et al.Chaos-based underwater communication with arbitrary transducers and bandwidth[J].Applied Sciences,2018,8(2):162.doi:10.3390/app8020162.
[20]KADDOUM G and SOUJERI E.NR-DCSK:A noise reduction differential chaos shift keying system[J].IEEETransactions on Circuits&Systems II Express Briefs,2016,63(7):648-652.doi:10.1109/TCSII.2016.2532041.
[21]KADDOUM G,RICHARDSON F D,and 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.doi:10.1109/TCOMM.2013.071013.130225.
[2]张刚,孟维,张天骐.多用户分段移位差分混沌键控通信方案[J].电子与信息学报,2017,39(5):1219-1225.doi:10.11999/JEIT160795.ZHANG Gang,MENG Wei,and ZHANG Tianqi.Multiuser communication scheme based on segment shift differential chaos shift keying[J].Journal of Electronics&Information Technology,2017,39(5):1219-1225.doi:10.11999/JEIT160795.
[3]XU Weikai,WANG Lin,and CHEN Guanrong.Performance of DCSK cooperative communication systems over multipath fading channels[J].IEEE Transactions on Circuits&System I Regular Papers,2011,58(1):196-204.doi:10.1109/TCSI.2010.2071730.
[4]DAS S,MANDAL S K,and CHAKRABORTY M.LMMSEequalized DCSK communication system over a multipath fading channel with AWGN noise[C].Third International Conference on Computer,Communication,Control and Information Technology,Hooghly,India,2015:1-4.doi:10.1109/C3IT.2015.7060167.
[5]VALI R,BERBER S M,and NGUANG S K.Analysis of chaos-based code tracking using chaotic correlation statistics[J].IEEE Transactions on Circuits&Systems IRegular Papers,2012,59(4):796-805.doi:10.1109/TCSI.2011.2169885.
[6]FU Yongqing and LI Xingyuan.A novel chaos oscillation and its application in wireless communication[C].International Conference on Smart and Sustainable City and Big Data,the Institution of Engineering and Technology,Shanghai,China,2015:83-90.doi:10.1049/cp.2015.0258.
[7]DING Qun and WANG Jianan.Design of frequencymodulated correlation delay shift keying chaotic communication system[J].IET Communications,2011,5(7):901-905.doi:10.1049/iet-com.2010.0643.
[8]ESCRIBANO F J,KADDOUM G,WAGEMAKERS A,et al.Design of a new differential chaos-shift-keying system for continuous mobility[J].IEEE Transactions on Communications,2016,64(5):2066-2078.doi:10.1109/TCOMM.2016.2538236.
[9]MARTIN H and THOMAS S.Chaos communication over noisy channels[J].International Journal of Bifurcation and Chaos,2000,10(4):719-735.doi:10.1142/S0218127400000505.
[10]FRANCIS C M L and CHI K T.On optimal detection of noncoherent chaos-shift-keying signals in a noisy environment[J].International Journal of Bifurcation&Chaos,2003,13(6):1587-1597.
[11]YANG Hua,JIANG Guoping,and DUAN Junyi.Phaseseparated DCSK:A simple delay-component-free solution for chaotic communications[J].IEEE Transactions on Circuits&Systems II Express Briefs,2014,61(12):967-971.doi:10.1109/TCSII.2014.2356914.
[12]ALBASSAM N N.A new hybrid DCSK-CDSK scheme for Chaos based communications[C].International Conferenceon Information and Communication Systems,IEEE,Irbid,Jordan,2014:1-5.doi:10.1109/IACS.2014.6841977.
[13]YANG Hua and JIANG Guoping.High-efficiency differential-chaos-shift-keying scheme for chaos-based noncoherent communication[J].IEEE Transactions on Circuits System II Express Briefs,2012,59(5):312-316.doi:10.1109/TCSII.2012.2190859.
[14]GALIAS Z and MAGGIOM G M.Quadrature chaos-shift keying:Theory and performance analysis[J].IEEETransactions on Circuits&Systems I Fundamental Theory&Applications,2001,48(12):1510-1519.doi:10.1109/TCSI.2001.972858.
[15]KADDOUM G,SOUJERI E,ARCILA C,et al.I-DCSK:An improved noncoherent communication system architecture[J].IEEE Transactions on Circuits&Systems IIExpress Briefs,2015,62(9):901-905.doi:10.1109/TCSII.2015.2435831.
[16]LAU F C M,YIP M M,TSE C K,et al.A multiple access technique for differential chaos shift keying[J].International Journal of Innovative Technology&Exploring Engineering,2013,49(1):96-104.doi:10.1109/81.974883.
[17]XU Weikai,WANG Lin,and KOLUMBAN G.A novel differential chaos shift keying modulation scheme[J].International Journal of Bifurcation&Chaos,2011,21(3):799-814.doi:10.1142/S0218127411028829.
[18]TALEB F,BENDIMERAD F T,and ROVIRASR D.Very high efficiency differential chaos shift keying system[J].IETCommunications,2016,10(17):2300-2307.doi:10.1049/ietcom.2016.0411.
[19]BAI Chao,REN Haipeng,GREBOGI C,et al.Chaos-based underwater communication with arbitrary transducers and bandwidth[J].Applied Sciences,2018,8(2):162.doi:10.3390/app8020162.
[20]KADDOUM G and SOUJERI E.NR-DCSK:A noise reduction differential chaos shift keying system[J].IEEETransactions on Circuits&Systems II Express Briefs,2016,63(7):648-652.doi:10.1109/TCSII.2016.2532041.
[21]KADDOUM G,RICHARDSON F D,and 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.doi:10.1109/TCOMM.2013.071013.130225.
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