基于E-PASTd的直扩信号盲扩频码估计算法  

A Blind Estimation Algorithm for Spread Spectrum Codes of DS/SS Signals Based on E-PASTd

作　　者：周德强[1] 陈卫东[1] 米健[2] 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081 [2]武汉大学电子信息学院,湖北武汉430072

出　　处：《无线电工程》2013年第11期18-22,共5页Radio Engineering

摘　　要：基于增强的压缩投影近似子空间跟踪(E-PASTd)的盲扩频码估计算法具有低运算量、低存储量和易于硬件实现的优点。介绍了基于E-PASTd的盲扩频码估计算法并分析了这种算法性能不理想的原因,针对性地提出了解决这些问题的3个措施,包括增加接收信号时间窗宽度、权向量归一化和主动延时信号。提出了一种改进的基于E-PASTd的盲扩频码估计算法,并仿真验证了改进算法的有效性。The blind estimation algorithm for spread spectrum codes based on E-PASTd which has lower computational complexity and lower storage is prone to hardware realization. First,the blind estimation algorithm for spread spectrum codes based on E-PASTd is introduced and the reasons of unsatisfied performance are analyzed. Three measures including the expansion of window width,normalizing the weight vector and delaying the received signal are proposed to solve these existing problems. Then,an improved blind estimation algorithm for spread spectrum codes based on E-PASTd is proposed. At last,simulation results demonstrate the validity of the improved algorithm.

关 键 词：直接序列扩频(DS SS)信号 盲同步 盲扩频码估计 压缩投影近似子空间跟踪 

分 类 号：TN911[电子电信—通信与信息系统]