Abstract-In this letter, we propose a new detector for code acquisition systems in non-Gaussian noise channels. Modeling the acquisition problem as a hypothesis testing problem, a detector is derived for non-Gaussian, symmetric -stable noise, based on the locally optimum detection technique. Numerical results show that the proposed detector can offer robustness and substantial performance improvement over the conventional schemes in nonGaussian channels.Index Terms-Code acquisition, locally optimum (LO) detection, non-Gaussian impulsive channel, spread-spectrum system.
Key Words : GNSS, anti-jamming, quantization, conversion loss, quantization step size ABSTRACT This paper has derived the conversion loss according to the synchronized condition between the transmitted and locally generated spreading signals for the civil global positioning system (GPS) receiver in the heavy wideband Gaussian noise environments. From this, the outputs of the 2-bit nonuniform quantizer, which has the minimum conversion loss, is set to ± and ± , while the quantization step size is approximated to the jamming-to-signal power ratio.
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