Fast Algorithm with Improved Circular Correlation Method for GPS Signal Acquisition

Yan Min Li; Qing Ming Yi; Min Shi

doi:10.4028/www.scientific.net/AMR.706-708.794

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 706-708Fast Algorithm with Improved Circular Correlation...

Fast Algorithm with Improved Circular Correlation Method for GPS Signal Acquisition

Abstract:

In order to improve acquisition speed and carrier frequency accuracy, a fast algorithm to acquire GPS signal is proposed. Signal-to-Noise Ratio is improved by coherent integration and non-coherent integration. The advantages of serial sliding algorithm and circular correlation algorithm are combined to achieve high carrier frequency accuracy. Removing the information of C/A code makes serial search from two-dimensional to one-dimensional to achieve less computation. Simulation shows weak signal of-30dB S/N is successfully acquired. The error of carrier frequency is controlled within 50Hz. So the data processing efficiency for the tracking loop is greatly increased.