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Journal of Projectiles, Rockets, Missiles and Guidance >

2011 , Vol. 31 >Issue 4: 167 - 171

DOI: https://doi.org/10.15892/j.cnki.djzdxb.2011.04.024

CORRELATION TECHNOLOGY

A Monitoring Method for BOC Signal Ranging Code

  • WANG Yao ,
  • LUO Xianzhi ,
  • YANG Shenyuan
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  • 1 College of Information and Communication Engineering, Harbin Engineering University, Harbin 150001, China
    2 Hebei Satellite Navigation Technology and Equipment Engineering Technology Research Centre, Shijiazhuang 050081, China

Received date: 2010-10-11

  Online published: 2025-05-30

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Abstract

Ranging code monitoring is one of the most important functions of signal monitoring system. However, the received signal is often buried in noise, and the ranging codes are not visible in time domain. The autocorrelation and power spectral density functions of BOC signal were derived, and a BOC ranging code decoding method was proposed in low SNR. In this method, Doppler frequency and code rate were estimated by spectral correlation theory based on signal's cyclostationarity and noise's wide sense stationary. After wiping off the Doppler shift, navigation message bits were determined and removed by slide-correlating a small slice of itself with the whole data. The start of the code was determined by stacking multiple periods of the whole data into a code period, and then the whole data was shifted to the start of the PRN code, and was restacked. Then the individual period of PRN codes was estimated after wiping off subcarrier. This method was verified by simulating BOC(1,1) signal.

Key words： Global navigation satellite system; signal monitoring; ranging code; cyclic spectrum; slide-correlation

Cite this article

WANG Yao , LUO Xianzhi , YANG Shenyuan . A Monitoring Method for BOC Signal Ranging Code[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2011 , 31(4) : 167 -171 . DOI: 10.15892/j.cnki.djzdxb.2011.04.024

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