Journal of Systems Engineering and Electronics ›› 2019, Vol. 30 ›› Issue (3): 474-484.doi: 10.21629/JSEE.2019.03.05

• Electronics Technology • Previous Articles     Next Articles

Quality monitoring and biases estimation of BOC navigation signals

Hongwei ZHAO1,*(), Zichun ZHANG1(), Xianzhi LUO2(), Qiuping WANG1()   

  1. 1 School of Electronics and Information, Northwestern Polytechnical University, Xi'an 710129, China
    2 State Key Laboratory of Satellite Navigation System and Equipment Technology, Shijiazhuang, 050081, China
  • Received:2018-02-26 Online:2019-06-01 Published:2019-07-04
  • Contact: Hongwei ZHAO E-mail:hongvi_zhao@126.com;2244247525@qq.com;xzluosjz@126.com;wangqiuping.npu@mail.nwpu.edu.cn
  • About author:ZHAO Hongwei was born in 1980. He is an associate professor in Northwestern Polytechnical University. His research interests are satellite positioning and navigation. E-mail:hongvi_zhao@126.com|ZHANG Zichun was born in 1996. She is a master candidate in School of Electronics and Information, Northwestern Polytechnical University. Her research interests are satellite navigation. E-mail:2244247525@qq.com|LUO Xianzhi was born in 1976. He is a senior engineer and a doctor in State Key Laboratory of Satellite Navigation System and Equipment Technology. His research interests are satellite navigation and quality assessment. E-mail:xzluosjz@126.com|WANG Qiuping was born in 1997. She is a master candidate in School of Electronics and Information, Northwestern Polytechnical University. E-mail:wangqiuping.npu@mail.nwpu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(61771393);the National Natural Science Foundation of China(61571368);This work was supported by the National Natural Science Foundation of China (61771393; 61571368)

Abstract:

Many safety-critical applications that utilize the global navigation satellite system (GNSS) demand highly accurate positioning information, as well as highly integrity and reliability. Due to GNSS signals are easily distorted by the interferences or disturbances, the signal quality monitoring (SQM) is necessary to detect the presence of dangerous signal distortions. In this paper, we developed an SQM software for binary offset carrier (BOC) modulated navigation signals. Firstly, the models of BOC signal with ideal and distortion are presented respectively. Then the architecture of SQM software is proposed. Moreover, the effect of the white gaussian noise (WGN) and the front-end filter on the correlation peak of the receiver is analyzed. Finally, the biases induced by the signal distortion are evaluated. The experiments simulate the relationships between the code phase shift and the normalized correlation value in the case of the signal digital distortion and the analog distortion. The simulation results demonstrate that the proposed SQM method can effectively monitor the signal distortion and accurately estimate the correlation peak deviation caused by the distortion.

Key words: signal quality monitoring (SQM), binary offset carrier (BOC) modulation, biases estimation, signal distortion, correlation peak