北斗系统信号时域波形失真评估  

Navigation Signal Chip Domain Assessment on Beidou Navigation System

作　　者：康立[1,2] 卢晓春[1,2,3] 王雪 贺成艳[1,2] 饶永南 KANG Li;LU Xiaochun;WANG Xue;HE Chengyan;RAO Yongnan(National Time Service Center, Chinese Academy of Sciences, Xi＇an 710600, China;Key Laboratory of Precision Navigation~ Positioning and Timing, National Time service Center, Chinese Academy of Sciences, Xi＇an 710600, China;School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 101408, China;School of Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 101408, China)

机构地区：[1]中国科学院国家授时中心,西安710600 [2]中国科学院精密导航定位与定时技术重点实验室,西安710600 [3]中国科学院大学天文与空间学院,北京101408 [4]中国科学院大学电子电气与通信工程学院,北京101408

出　　处：《电子与信息学报》2018年第4期1002-1006,共5页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61501430);中国科学院青年创新促进会基金~~

摘　　要：卫星导航信号时域波形是空间信号质量监测和评估(SQM)的重要内容,本文利用大口径天线接收系统采集的离线数据对北斗IGSO-6卫星B1频点信号时域波形进行分析。首先提出利用基于码相位平均方法求取高信噪比的时域波形,在此基础上利用标准码片波形相关技术提取出码元波形。然后建立相关函数和码元波形的统计理论联系,利用码元波形相关函数差分析信号边沿特性,最后在时域波形上计算出所有北斗卫星的数字失真量,详细评估不同卫星数字失真规律。Satellite navigation signal waveform is the key factor of signal-in-space quality monitoring. This study mainly focuses on signal waveforms analysis for BDS IGSO-6 frequency B1 by using data of big antenna receiving system. Firstly, code phase average method is proposed to get the high SNR signal waveform, and based on this way the standard chip shape correlator is utilized to extract code element chip. Then, theory between correlation function and code chip is constructed and signal edges characters by using code element chip correlation differences are analyzed. Finally, digital distortions of all BDS satellites are calculated and assessed in detail through signal waveform in time domain.

关 键 词：卫星导航 时域波形 码相位平均 标准码片波形相关 数字失真 

分 类 号：TN967.1[电子电信—信号与信息处理]