GLONASS L1OC信号捕获算法研究及分析  

Research and analysis of GLONASS L1OC signal acquisition algorithm

作　　者：王展 巴晓辉[1,2] 王依婷 WANG Zhan;BA Xiao-hui;WANG Yi-ting(Institute of Microelectronics of the Chinese Academy of Sciences,Beijing 100029,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院微电子研究所,北京100029 [2]中国科学院大学,北京100049

出　　处：《电子设计工程》2019年第1期89-93,共5页Electronic Design Engineering

基　　金：中国科学院"创新交叉团队"~~

摘　　要：GLONASS L1OC信号是CDMA调制信号,由数据通道和导频通道时分复用构成,其中导频通道采用二进制偏移载波(Binary Offset Carrier,BOC)调制。本文采用了基于短时结合FFT算法架构实现了对GLONASS L1OC信号的捕获,对数据和导频通道分别设计了捕获方法。其中针对导频通道,采用了边带捕获算法,捕获结果的判决采用门限法和码相位比较法,结果显示码相位比较法能够进一步提高发现概率。在使用码相位比较策略进行捕获判决的情况下,输入信号载噪比为32 dBHz时,采用数据通道捕获的发现概率达到了94.8%,而导频通道捕获的发现概率为83.6%。本文对实验结果也进行了理论分析。The GLONASS L1OC signal is CDMA modulation signal which is composed of data component and pilot component.And the pilot component is BOC(Binary Offset Carrier)signal.The acquisition of GLONASS L1OC signal is realized based on the short time correlation combined FFT algorithm.It adopts the sideband acquisition algorithm Because of BOC signal of the pilot component.The result of the acquisition is judged by the strategy of threshold and code phase comparison,and we find that the code phase comparison strategy can further improve the detection probability than threshold strategy.The detection probability acquired by data component is94.8%and the detection probability acquired by pilot component is83.6%where CNR(Carrier Noise Ration)of input signal is32dBHz with the result judged by the strategy code phase comparison.

关 键 词：GLONASSL1OC信号 短时相关 FFT 二进制偏移载波 边带捕获 码相位比较 

分 类 号：TN99[电子电信—信号与信息处理]