首页期刊简介编委会投稿启事审稿流程读者订阅广告服务联系我们English
引用本文
  •    [点击复制]
  •    [点击复制]
【打印本页】 【下载PDF全文】 查看/发表评论下载PDF阅读器关闭

←前一篇|后一篇→

过刊浏览    高级检索

本文已被:浏览 107次   下载 33 本文二维码信息
码上扫一扫!
无码间干扰DC-CDSK混沌通信方案
张刚,许嘉平,张天骐
0
(重庆邮电大学 信号与信息处理重庆市重点实验室,重庆400065)
摘要:
针对差分混沌-相关延时移位键控(DC-CDSK)存在的码间干扰而造成的比特误码率较高问题,提出了一种无码间干扰DC-CDSK混沌通信方案。通过改变混沌信号发生器的结构,确保发送的两路混沌信号严格正交,彻底解决了判决变量中码间干扰问题。推导了在高斯白噪声信道中的比特误码率公式并完成仿真,结果表明,在一定信噪比和扩频因子条件下无码间干扰DC-CDSK比特误码率比原系统提高了2~3 dB。
关键词:  混沌通信  DC-CDSK  判决变量  码间干扰
DOI:
基金项目:国家自然科学基金资助项目(61371164);重庆市教育委员会科研项目(KJ1600429)
A DC-CDSK chaotic communication system without inter-symbol interference
ZHANG Gang,XU Jiaping,ZHANG Tianqi
(Chongqing Key Laboratory of Signal and Information Processing,Chongqing niversity of Posts  and Telecommunications,Chongqing 400065,China)
Abstract:
For existing defects of high bit error rate(BER) caused by inter-symbol interference(ICI) in the Differential Chaos-Correlation Delay Shift Keying(DC-CDSK),a novel DC-CDSK chaotic communication system without inter-symbol interference is proposed.By changing the structure of chaotic signal generator,the modulated chaotic signals transmitted in two channels become strictly orthogonal,which thoroughly eliminates all possible inter-symbol interference component in all decision variables.The BER formula in Gaussian channel is derived and numerous simulations are completed.The simulation results show that the BER performance in proposed DC-CDSK without inter-symbol interference increases by 2~3 dB compared with that of the conventional DC-CDSK under certain signal-to-noise ratio(SNR) and spreading factor.
Key words:  chaotic communication  DC-CDSK  decision variables  inter-symbol interference
安全联盟站长平台