摘要
在现代通信系统中,对于全数字化扩频接收机来说,由于伪码跟踪环中鉴相器具有非线性特性,所以有可能使扩频通信环路工作在非线性区域。本文分析了一种非相干伪码跟踪环路的线性以及非线性跟踪性能,并得到了环路的收敛域与收敛条件,这些分析结果对环路参数的设计都是至关重要的。
It is difficult for an all-digital receiver operating in non-linear situation to ensure spread spectrum signal tracking precision in modern communication system. A new linear and non-linear mode and the performance of 2st-order DDLL during the PN phase tracking are analyzed in this paper. The algorithm presented in the paper achieved the stable condition and region of 2st-order DDLL. All of these analyses results are very important to design applicable parameters of the loop.
出处
《航空电子技术》
2006年第4期1-5,22,共6页
Avionics Technology
关键词
扩频通信
数字延迟跟踪环
鉴相器
收敛域
非线性
SS communication
digital delay-locked loop（DDLL）
code-phase discriminator
stable region
non-linear
