摘要
介绍了直接序列扩频系统的组成,分别给出了传统伪码捕获的方法和一种改进后的捕获方法。从理论上分析了2种方法的性能差别。通过分别在扩频系统中的实际应用,记录获取了大量的实验数据。经过数据的统计分析,验证了这2种方法的实际性能差别,进而得到一种在低信噪比下性能优于传统方法的伪码快速捕获方法。
The composition of DSSS system is introduced, and a traditional method of acquisition of PN and an improved method are given respectively. The difference between the two methods is analyzed theoretically, and a large amount of experiment data are recorded and obtained through their practical applications in spread spectrum system. The practical difference between the two methods is proved, thus a better method of acquisition of PN in low SNR is got.
出处
《无线电工程》
2007年第1期14-16,共3页
Radio Engineering
关键词
直接序列扩频
信噪比
伪码
direct sequence spread spectrum
signal-to-noise ratio
pseudo noise
