基于软件无线电的直接扩频序列接收机新方案  

Novel Design of Direct Sequence Spread Spectrum Receiver Based on Software Radio

作　　者：陈忠辉[1] 冯心欣[1] 

机构地区：[1]福州大学物理与信息工程学院,福建福州350108

出　　处：《现代电子技术》2010年第5期9-12,共4页Modern Electronics Technique

基　　金：福建省教育厅项目(JB06062)

摘　　要：在低信噪比的低压电力线通信环境中,使用传统的扩频解调方法,不易提取同步载波。针对这一问题,提出一种基于软件无线电结构的直接扩频序列(DSSS)接收机方案。该方案以带通采样定理为依据,结合A/D转换器和数字低通滤波器,无需提取同步载波即可完成已调信号的解调,并在基带完成信号的解扩。通过理论和仿真证明,该方案开销低,抗噪性能强,适合在恶劣的通信环境中使用。The synchronous carrier is difficult to extract in low SNR power line communication environment by traditional spread - spectrum demodulation method. To solve this problem,a novel design of Direct Sequence Spread Spectrum （DSSS） receiver based on software radio structure and band - pass sampling theorem is proposed. The designed receiver consists of A/D converter and digital low- pass filter, which can demodulate information without carrier synchronization. Moreover, spread- spectrum demodulation can be realized in baseband. Both theoretical analysis and simulation results prove that the novel receiver structure has low cost and high anti- noise performance,and it can be applied in rough communication environment.

关 键 词：低压电力线通信 扩频 软件无线电 带通采样定理 

分 类 号：TN914.42[电子电信—通信与信息系统]