CCS对DCSK调制系统的误码率影响  

Effect of Chebyshev Chaos Sequence on BER of DCSK Modulation System

作　　者：王凤英[1] 胡晓莉[1] 秦岭 郭瑛[1] WANG Feng-ying;HU Xiao-li;QIN Ling;GUO Ying(Department of Information Engineer,Inner Mongolia University of Science & Technology,Baotou Inner Mongolia 014010,China)

机构地区：[1]内蒙古科技大学信息工程学院

出　　处：《计算机仿真》2019年第10期161-164,共4页Computer Simulation

基　　金：国家自然科学基金资助(61501266);内蒙古自治区自然科学基金资助(2018LH06002)

摘　　要：针对DCSK系统误码性能不理想的问题,研究Chebyshev混沌序列,分析其对DCSK调制系统误码率的影响.首先介绍DCSK调制解调工作原理,给出基于Chebyshev混沌序列的DCSK调制解调系统框图,分析Chebyshev,Logistic和Tent三种混沌序列在AWGN信道下不同的信噪比的DCSK调制系统误码率,在不相同的信噪比下研究Chebyshev混沌序列的长度对DCSK调制系统性能影响.利用MATLAB软件平台进行了仿真,仿真结果表明,Chebyshev混沌序列更适合于DCSK系统,且当信噪比一定的情况下,随着Chebyshev混沌序列长度的增大,DCSK系统误码率越低.实验结果为上述系统的实际应用提供一定的参考价值.To solve the problem that the DCSK system miscode performance is not ideal,the Chebyshev chaotic sequence was studied,and its influence on the DCSK modulation system error rate was analyzed. First,the principle of DCSK modulation demodulation was introduced and the frame diagram of DCSK modulation demodulation system based on Chebyshev chaotic sequence was given. Then the DCSK modulation system error rate of different signal-to - noise ratios was analyzed based on Chebyshev,Logitic,and Tent chaotic sequences under the AWGN channel. Finally ,the influence of the length of Chebyshev chaotic sequence on the performance of DCSK modulation system was studied under different signal - to - noise ratios. Simulation using MATLAB software platform shows that the Chebyshev chaotic sequence is more suitable for DCSK system,and when the signal - to - noise ratio is certain,with the increase of Chebyshev chaotic sequence length,and the DCSK system error rate is lower. The experimental results provide some reference for the practical application of the system.

关 键 词：切比雪夫混沌序列 差分混沌相移键控 误码率 

分 类 号：TN911.3[电子电信—通信与信息系统]