一种适合于非相干直扩信号捕获的方法

An acquisition scheme for non-coherent DSSS signal

介绍了非相干直接序列扩频的基本概念,并建立了非相干直接序列扩频信号基带传输模型;在此基础上研究了直接序列扩频中捕获的难点,并提出一种基于后相关滤波和功率检测的捕获方法;最后,根据工程需要对系统进行了简化。仿真结果表明提出的捕获方法是适合非相干直接序列扩频的,且性能接近相干直接序列扩频。

A base-band model for non-coherent DSSS （Direct Sequence Spread Spoctrum） signal is built after its basic conception is introduced. Based on the analysis of non-concerned DSSS signal, a new acquisition scheme on basis of post-correlation filtering and power detecting is presented. At last, the proposed scheme is simplified to reduce the hardware complexity. The simulation result shows that the proposed scheme is adapted to non-concerned DSSS signal, and its performance is similar with the coherent DSSS signal.