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Volume 42 Issue 8
Aug.  2016
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Journal of Beijing University of Aeronautics and Astronautics  > 2016  >  42(8): 1724-1730.
PAN Hongchen, KOU Yanhong. Correlation loss caused by GNSS receiver front-end processing for strong signals[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(8): 1724-1730. doi: 10.13700/j.bh.1001-5965.2015.0518(in Chinese)
Citation: PAN Hongchen, KOU Yanhong. Correlation loss caused by GNSS receiver front-end processing for strong signals[J]. Journal of Beijing University of Aeronautics and Astronautics, 2016, 42(8): 1724-1730. doi: 10.13700/j.bh.1001-5965.2015.0518(in Chinese)
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Correlation loss caused by GNSS receiver front-end processing for strong signals

doi: 10.13700/j.bh.1001-5965.2015.0518

  • School of Electronic and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

  • Received Date: 10 Aug 2015
  • Publish Date: 20 Aug 2016
    Abstract
  • In the applications of global navigation satellite system (GNSS) signal quality monitoring and GNSS radio frequency (RF) signal simulator test, the power of the desired GNSS signal usually goes much higher above the noise floor. This paper investigates the correlation power loss of binary phase shife keying (BPSK) and binary offset carrier (BOC) signals caused by band-limiting, sampling and quantization (BSQ) processing under strong signal conditions. Firstly, the correlation power loss caused by band-limiting and sampling without quantization is studied, and then the loss caused by quantization and sampling without band-limiting is analyzed. Consequently the desired signal correlation loss under corresponding conditions is theoretically derived, and the optimal step size of the uniform quantizer with different quantization bit numbers is determined. Finally, for the combined effect of BSQ on the signal correlation power, Monte Carlo simulations are conducted to analyze the normalized correlator power with the configurations of different bandwidths and quantization bit numbers of a GPS L1 C/A receiver, from which a method of fitting an analytical expression of correlation power loss by using the simulation results is explored to simplify the analysis.

     

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