Journal of Systems Engineering and Electronics ›› 2019, Vol. 30 ›› Issue (6): 1053-1063.doi: 10.21629/JSEE.2019.06.01

• Electronics Technology •     Next Articles

Influence of B1 code correlation loop for vector tracking structures under complicated environment

Qian WANG1,*(), Feng SHANG1(), Liming DU2(), Wenjia ZHOU1()   

  1. 1 School of Electronic Engineering, Xi'an University of Posts and Telecommunications, Xi'an 710121, China
    2 Qingdao Huatong Intelligent Research Institute, Qingdao 266111, China
  • Received:2018-11-06 Online:2019-12-20 Published:2019-12-25
  • Contact: Qian WANG;;;
  • About author:WANG Qian was born in 1978. He received his Ph.D. degree in Computer Science Department of Beihang University. He is a senior researcher in Xi’an University of Posts and Telecommunications. His research interests include the design of algo- rithms for signal tracking, integrated navigation and precision positioning. E-mail:|SHANG Feng was born in 1966. He received his M.S. degree in electromagnetic field and microwave technology of Xidian University. He is a professor in Xi'an University of Posts and Telecommunications. His research interests include the antenna theory and engineering, and radio frequency signal processing. E-mail:|DU Liming was born in 1978. He received his M.S. degree in communication and information system of Nanjing University of Aeronautics and Astronautics. He is a senior engineer at Qingdao Huatong Intelligent Research Institute. He is mainly engaged in the research of digital signal processing and satellites navigation. E-mail:|ZHOU Wenjia was born in 1986. She received her Ph.D. degree in control science and engineering, Northwestern Polytechnical University. She is a lecturer in Xi'an University of Posts and Telecommunications. Her research interests include microwave delay technology and microwave devices. E-mail:
  • Supported by:
    This work was supported by the National Natural Science Fundation of China(41474027);This work was supported by the National Natural Science Fundation of China (41474027)


The code tracking loop is a key component for user positioning. The pseudorange information of BeiDou B1 signals has been fused and changed for vector tracking, so a correlation output model for complex scenarios is designed to prevent the propagation of error and valuate the signal performance. The relevant software and hardware factors that affect the output are analyzed. A single channel time-division multiplexing (TDM) method for multicorrelation data extraction is proposed. Statistical characteristics of the correlation output data for both vector and scalar structures are evaluated. Simulation results show that correlation outputs for both structures follow normal or Chi-squared distributions in normal conditions, and the Gamma distribution in harsh conditions. It is shown that a tracking model based on the multi-channel fusion hardly changes the probability distribution of the correlation output in the normal case, but it reduces the ranging error of the code loop, and hence the tracking ability of the code loop for weak signals is improved. Furthermore, vector tracking changes the pseudorange characteristics of channels anytime, and affects the mutual correlation outputs of the code loops in the abnormal case. This study provides a basis for the subsequent design of autonomous integrity algorithms for vector tracking.

Key words: vector tracking, signal quality, code correlation, pseudorange error, scalar tracking, correlation peak loss