Journal of Astronautics

Journal of Astronautics ›› 2011, Vol. 32 ›› Issue (12): 2491-2498.doi: 10.3873/j.issn.1000-1328.2011.12.004

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P Code Direct Acquisition Algorithm and Its Resource Optimization Method

WANG Jun1, LI Jia-qi2, WU Si-liang2   

  1. 1.School of Electronics and Information Engineering, Beijing Jiaotong University, Beijing 100044, China;
    2.School of Information and Electronics, Beijing Institute of Technology, Beijing 100081,China
  • Received:2010-09-25 Revised:2011-04-26 Online:2011-12-15 Published:2011-12-20

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Abstract: To reduce the resource consumption, an optimization method is proposed for the P code direct acquisition. Under the condition of constraints of detection probability, false alarm probability and acquisition time to meet the system requirements, the method makes both single and multiple objective optimization to minimize the memory resources, multiplier resources and logic resources. And by combining characteristics of the FFT fast acquisition method and the delay-multiply method, the proposed method can freely assign searching parallelism in both time domain and frequency domain. So the method is common to many acquisition tasks with different shapes of the captured region, and the resource optimization is made more effective.

Key words: P code direct acquisition, resource optimization, multiple objective optimization, searching parallelism