一种GNSS信号基带波形分离方法  

A Separation Method of Baseband Waveform for GNSS Signals

作　　者：严涛[1] 王瑛[1] 刘潇 王国永[1] 雷文英[1] 边朗[1] 

机构地区：[1]中国空间技术研究院西安分院,西安710000

出　　处：《空间电子技术》2017年第6期26-32,43,共8页Space Electronic Technology

摘　　要：新一代GNSS信号将多个信号分量结合在一起进行播发,导致信号波形更加复杂。而信号分量的时域波形,对分析信号分量的畸变、信号质量具有重要意义。因此,高精度的基带波形分离方法成为关键技术。提出一种加权分组累加(WGA)的基带波形分离方法,首先根据电文符号的值,对码周期进行分组累加,然后对累加后的结果进行加权求和。以Dua QPSK信号为对象进行仿真,结果表明,WGA方法相比于传统的方法,分析精度显著提升,完全消除了其他分量残留的影响,而且对电文符号的随机性没有严格要求。For ne＊w generation of GNSS signals,multiple signal components need to be transmitted together,which makes Ae signal waveforrm be complex. The time-domain waveforrm is very important to analyze the siity. Therefore ,the high-precise separation method of baseband waveforrm becomes a key technique. This paper proposes a sep-aration method of baseband waveforrm based on weighted group accumulation. Firstly,different code periods acording to the values of message symbols and accumulated. Then these accumulation results are weighted sulation results of DuaK^PSK signal show that the accuracy of the proposed WGA method has a significant impared with traditional method. WGA method can fully remove the influence of other signal coconstraints on the randomness of message symbols.

关 键 词：全球导航卫星系统 加权分组累加 基带波形 DualQPSK 

分 类 号：V474[航空宇航科学与技术—飞行器设计]