复用跟踪通道数字信号处理

本文针对多系统多频点多模式接收机兼容数字处理技术,阐述了数字信号处理的基本原理,并就以往数字接收机的处理技术在灵活性和兼容性上的缺陷,重点研究了多系统多频点不同卫星信号的数字跟踪通道的复用技术,并对数字信号的跟踪处理技术(即信号捕获、扩频码跟踪、载波捕获及载波跟踪处理)进行了详细探讨,设计建立了由可设置的数字载波NCO、码NCO、扩频码产生器及配置控制软件组成的可复用的数字跟踪处理通道,具备对多系统的卫星定位信号进行捕获、跟踪的兼容性和灵活性处理能力。

Aiming at the compatible digital processing technology of multi-system muhi-frequency spot multi-mode receiver, this report explains the basic principle of digital signal processing. In order to improve the flexibility and compatibility in processing technology of digital receiver, the reuse technology of digital tracking channel are studied for different satellite signals at mukiple frequency spots from multiple systems, and the tracking and processing technology including signal acquisition, PRN code tracking,carrier acquisition as well as carrier tracking and processing are also discussed in details. A reusable digital track processing channel which is made up of reconfigurable carrier NCO, code NCO, PRN code generator and configuration control software is designed to provide the compatible ability to acquire, track and process the satellite positioning signals from multiple systems.