6th International ICST Conference on Communications and Networking in China

Research Article

Design of High Sensitivity GPS Signal Acquisition Circuit with New Frequency Domain Search Strategy

  • @INPROCEEDINGS{10.1109/ChinaCom.2011.6158288,
        author={zou deyue and Wenjing Wang and Shuai Han and Weixiao Meng},
        title={Design of High Sensitivity GPS Signal Acquisition Circuit with New Frequency Domain Search Strategy},
        proceedings={6th International ICST Conference on Communications and Networking in China},
        publisher={IEEE},
        proceedings_a={CHINACOM},
        year={2012},
        month={3},
        keywords={gps; weak signal;  fast  acquisition; fpga},
        doi={10.1109/ChinaCom.2011.6158288}
    }
    
  • zou deyue
    Wenjing Wang
    Shuai Han
    Weixiao Meng
    Year: 2012
    Design of High Sensitivity GPS Signal Acquisition Circuit with New Frequency Domain Search Strategy
    CHINACOM
    IEEE
    DOI: 10.1109/ChinaCom.2011.6158288
zou deyue1,*, Wenjing Wang1, Shuai Han1, Weixiao Meng1
  • 1: Communication Research Center of Harbin Institute of Technology
*Contact email: zoudeyue_hit@163.com

Abstract

In this paper a GPS signal acquisition circuit is designed based on FPGA and a new GPS signal frequency domain search strategy is proposed and implemented by combining the cyclic shift sweep and DDS sweep. The system frequency domain search speed is improved evidently. And TTFF (time to first fix) can be extremely reduced, with out to much extra hardware costs. As a result, the weak signal acquisition and fast acquisition could be achieved simultaneously. Through hardware testing the sensitivity of the system and the advantages of the new strategy in the search speed is validated.