应用LMS自适应滤波器实现直接序列扩频系统伪码同步  

Code Synchronization in Direct Sequence Spread Spectrum Systems Using LMS Adaptive Filter

作　　者：陈良灏[1] 朱亮[1] 

机构地区：[1]海军工程大学,湖北武汉430033

出　　处：《现代电子技术》2007年第23期30-32,共3页Modern Electronics Technique

摘　　要：在直扩系统中,伪随机序列的同步必须在数据解调判决前完成。介绍了一种新型的同步方法,这种方法利用LMS自适应滤波器来检测收发端的码延迟,具有比传统的相关检测更优良的性能。更重要的是,这种方法根据稳定后的滤波器工作特性,可直接实现PN码的跟踪,不需要额外电路。In the Direct Sequence Spread Spectrum （DS/SS）,code synchronization must be accomplished before the data demodulation. The paper proposed a new scheme, which detects the delay between the received code and the local code with an adaptive filter. The coefficients of filter are adjusted by the LMS algorithm. The proposed system has better performance than the traditional schemes, moreover, the same system could be employed in code tracking.

关 键 词：LMS算法 自适应FIR滤波器 直接序列扩频 PN码同步 

分 类 号：TN914.42[电子电信—通信与信息系统]