A Novel Concatenated Chaotic Communication System  

作　　者：Zhou Xiaolin, Song Wentao, Wu Dijia, Liu Jianbo & Luo Hanwen Department of Electronic Engineering, Shanghai Jiaotong University, Shanghai 200030, P.R.China(Received August 7, 2001) 

出　　处：《Journal of Systems Engineering and Electronics》2002年第2期1-6,共6页系统工程与电子技术（英文版）

基　　金：This project was supported by the National Natural Science Foundation of China (No. 60072028).

摘　　要：A strategy for a novel concatenated chaotic communication system is presented. The transmitter system comprises chaotic turbo encoder and logistic CSK block in a serially concatenated form. Chaotic turbo code is capable of reducing bit error rate (BER) of the chaotic system in the AWGN channel. Through the chaotic turbo encoder, the coded sequence, which has quasi-chaotic properties, will be transmitted into the logistic CSK block. Having a very sensitive dependence on initial conditions of the map, the logistic CSK block can also be taken as the chaotic authentication method. The receiver, which has logistic demodulation block and chaotic decoder, is a linear asymptotic approximation to the inverse of the transmitter system. A chaotic iterative soft-decision decoding algorithm is also developed based on conventional maximum A posteriori decoding algorithm. At last, a two-step authentication method of this chaotic system is also presented.A strategy for a novel concatenated chaotic communication system is presented. The transmitter system comprises chaotic turbo encoder and logistic CSK block in a serially concatenated form. Chaotic turbo code is capable of reducing bit error rate (BER) of the chaotic system in the AWGN channel. Through the chaotic turbo encoder, the coded sequence, which has quasi-chaotic properties, will be transmitted into the logistic CSK block. Having a very sensitive dependence on initial conditions of the map, the logistic CSK block can also be taken as the chaotic authentication method. The receiver, which has logistic demodulation block and chaotic decoder, is a linear asymptotic approximation to the inverse of the transmitter system. A chaotic iterative soft-decision decoding algorithm is also developed based on conventional maximum A posteriori decoding algorithm. At last, a two-step authentication method of this chaotic system is also presented.

关 键 词：Concatenated chaotic communication system Chaotic turbo codes Logistic CSK modulation. 

分 类 号：TN911[电子电信—通信与信息系统]