Navigation Signal Chip Domain Assessment on Beidou Navigation System
KANG Li①② LU Xiaochun①②③ WANG Xue①②④ HE Chengyan①② RAO Yongnan①②
①(National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China) ②(Key Laboratory of Precision Navigation, Positioning and Timing, National Time service Center, Chinese Academy of Sciences, Xi’an 710600, China) ③(School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 101408, China) ④(School of Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 101408, China)
Abstract：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.
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