摘要
在直接序列扩频传输系统中,接收端通常利用匹配滤波器实现扩频信号的初始捕获,扩频码同步时匹配滤波器的输出信噪比是决定捕获性能的一个重要因素。针对非相干直接序列扩频信号,通过理论推导和仿真验证得到了匹配滤波器输出信噪比与载波频差、扩频比以及匹配滤波器参数之间的关系,该结论可以为匹配滤波器的设计提供依据。
The receiver usually implements initial acquisition of DSSS signal by match filter in DSSS system.The output SNR of match filter after PN code synchronization is an important factor which decides the acquiring performance.The relation between SNR of match filter and carrier offset,spreading rate and the parameters of match filter has been deduced theoretically and verified by simulation in this paper. It can be used to design the match filter of receiving system.
出处
《无线电工程》
2011年第4期29-30,33,共3页
Radio Engineering
关键词
非相干扩频
匹配滤波器
信噪比
noncoherent DSSS
match filter
signal-to-noise ratio
