摘要
在TDRS通信系统中,用户星相对与中继星的高动态性引入的多普勒频移对扩频信号的捕获造成了很大困难。该文采用数字科斯塔斯环并结合数字匹配滤波辅助捕获的方法对TDRSS中的大多普勒频移进行捕获和消除,解决了大多普勒情况下载波恢复的难题,为工程实践提供了一种新思路。
The Costas loop aided with the digital matched filter(DMF) is applied to capture and eliminate the large Doppler shift in the tracking and data relay satellite system(TDRSS). Simulation results are presented,and a design example is a.lso given. The method solves the problem of carrier recovery as the large Doppler shift occurs. This study provides a novel scheme for practice.
出处
《合肥工业大学学报(自然科学版)》
CAS
CSCD
北大核心
2007年第3期268-270,共3页
Journal of Hefei University of Technology:Natural Science