基于CAPS系统的信号调制方式的比较研究

Comparitive Studies of Signal-Modulation Methods Based on the CAPS

概述了二元相移键控(BPSK)调制以及二进制偏移载波(Binary Offset Carrier,BOC)的调制原理,并基于由中国科学院主导研发的中国区域定位系统(Chinese Area Positioning System,CAPS)的实际情况,对其调制信号的测距精度、跟踪性能、多径误差的影响做了分析。分析结果对于中国区域定位系统信号体制设计、调制方式的选取具有一定的借鉴意义。

This paper first briefly describes the principle of BPSK （Binary Phase Shift Keying） modulation and B0C （Binary Offset Carrier） modulation. It then presents the analyses of the ranging precisions, the performance of tracking, and the muhipath errors in using the two modulation methods. These are based on the real conditions of the Chinese Area Positioning System （CAPS）, which was initiated by the Chinese Academy of Sciences. The results of our analyses can serve as guidance and have reference values in designing signal systems and choosing modulation methods.