计算机应用 ›› 2019, Vol. 39 ›› Issue (5): 1425-1428.DOI: 10.11772/j.issn.1001-9081.2018081760

• 网络与通信 • 上一篇    下一篇

多用户正交相关延迟键控方案性能分析

张刚, 黄南飞, 张天骐   

  1. 重庆邮电大学 通信与信息工程学院, 重庆 400065
  • 收稿日期:2018-08-23 修回日期:2018-10-15 发布日期:2019-05-14 出版日期:2019-05-10
  • 通讯作者: 黄南飞
  • 作者简介:张刚(1976-),男,四川巴中人,教授,博士,主要研究方向:混沌同步、混沌保密通信、微弱信号检测;黄南飞(1995-),男,江西丰城人,硕士研究生,主要研究方向:混沌保密通信;张天骐(1971-),男,四川眉山人,教授,博士,主要研究方向:语音信号处理、通信信号的调制解调、盲处理、神经网络实现、FPGA、VLSI实现。
  • 基金资助:
    国家自然科学基金资助项目(61771085,61371164);信号与信息处理重庆市市级重点实验室建设项目(CSTC2009CA2003);重庆市教育委员会科研项目(KJ1600427)。

Performance analysis of multi-user orthogonal correlation delay keying scheme

ZHANG Gang, HUAGN Nanfei, ZHANG Tianqi   

  1. School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
  • Received:2018-08-23 Revised:2018-10-15 Online:2019-05-14 Published:2019-05-10
  • Supported by:
    This work is partially supported by the National Natural Science Foundation of China (61771085, 61371164), the Project of Key Laboratory of Signal and Information Processing of Chongqing (CSTC2009CA2003), the Research Project of Chongqing Educational Commission (KJ1600427).

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。

关键词: 差分混沌移位键控, 多载波相关延迟移位键控, 多用户, 传输速率, 频谱效率, 误码率

Abstract: 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.

Key words: Differential Chaos Shift Keying (DCSK), Multi-Carrier Correlation Delay Shift Keying (MC-CDSK), multi-user, transmission rate, spectrum efficiency, Bit Error Rate (BER)

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