计算机应用 ›› 2015, Vol. 35 ›› Issue (4): 934-937.DOI: 10.11772/j.issn.1001-9081.2015.04.0934

• 网络与通信 • 上一篇    下一篇

直接序列扩频的分层级联随机共振接收算法

王爱珍1, 侯成郭2, 任国凤1   

  1. 1. 忻州师范学院 电子系, 山西 忻州 034000;
    2. 信息工程大学 信息系统工程学院, 郑州 450002
  • 收稿日期:2014-11-13 修回日期:2015-01-18 出版日期:2015-04-10 发布日期:2015-04-08
  • 通讯作者: 王爱珍
  • 作者简介:王爱珍(1976-),女,山西静乐人,副教授,主要研究方向:通信信号处理、计算机网络安全、宽带无线通信; 侯成郭(1981-),男,山西陵川人,博士研究生,主要研究方向:通信信号处理、通信系统物理层设计; 任国凤(1979-),女,山西忻州人,讲师,硕士,主要研究方向:通信信号处理、计算机网络安全。
  • 基金资助:

    国家自然科学基金资助项目(60472064, 61201380);忻州师范学院教改项目(JG201206, JG201311)。

Layered and cascaded stochastic resonance algorithm for direct sequence spread spectrum signal receiving

WANG Aizhen1, HOU Chengguo2, REN Guofeng1   

  1. 1. Electronics Department, Xinzhou Teachers University, Xinzhou Shanxi 034000, China;
    2. Information System Engineering Institute, Information Engineering University, Zhengzhou Henan 450002, China
  • Received:2014-11-13 Revised:2015-01-18 Online:2015-04-10 Published:2015-04-08

摘要:

为提高现有直接序列扩频通信的接收信号的解调增益,提出分层级联随机共振接收算法。通过在接收信号的载波下变频和基带信号解扩过程中分别设计级联双稳态随机共振系统,一方面实现了正弦载波信号的宽带化解调接收,另一方面实现了信道噪声的能量向信号能量的逐步转化。理论分析和仿真实验结果表明,所提算法可以通过改变采样频率扩大接收机的频谱适用范围,同时通过增加两层级联随机共振系统的级联数量提高接收机性能。

关键词: 无线通信, 随机共振, 级联, 直接序列扩频

Abstract:

To improve the demodulation performance of received direct sequence spread spectrum signal, a layered and cascaded stochastic resonance algorithm was presented. Two cascaded bistable stochastic resonance systems were designed respectively in the down-conversion process for carrier removing and the dispreading of baseband signal. By both of the systems, the broadband receiving of narrowband signal and the transformation from the energy channel noise to the signal energy were implemented. The theoretical analysis and simulation results show that the proposed algorithm can enlarge the application scope of frequency spectrum of the receiver, and improve the performance of receiver by increasing the number of the cascades of two-layer cascaded stochastic resonance system.

Key words: wireless communication, stochastic resonance, cascade, direct sequence spread spectrum

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