直接序列扩频通信中m序列的同步方案及其FPGA实现

M-sequences Synchronous Methods in Direct Sequence Spread Spectrum System and FPGA Implementation

文中介绍了直接序列扩频通信中m序列的两种主要同步捕获方法:滑动相关法和数字匹配滤波器法,并对其同步时间和抗噪声性能进行了理论分析和实验比较。结果表明,数字匹配滤波技术在直接序列扩频伪码同步捕获时,有其突出的特点,尤其在突发通信时,可以大大减少同步捕获时间。论文同时给出了其FPGA实现。

The paper describes two synchronous capturing methods, sliding correlating mode and digital matching filtering mode, in the direct sequence spread spectrum system, It theoretically analyzes their synchronous times and anti-interference performances and makes an experimental comparison. The result shows that the digital matching filtering technology has the extraordinary features in the direct sequence spread spectrum＇s synchronous capturing of pseudo noise code, and greatly decreases synchronous capturing time in burst communication. The paper also provides the FPGA（Field Programming Gate Array） implementation.