摘要
为了更快的捕获高动态GPS C/A码,研究了一种基于并行匹配相关与快速傅里叶变换(FFT)相结合的GPS信号捕获算法。分析了部分相关器长度和FFT点数对捕获性能的影响,及相关损失与最大多普勒频移和相关器长度的关系。实验仿真及硬件验证表明:该方法能够充分利用并行算法的优点,设计策略可以灵活配置硬件资源,能够快速实现动态范围±10 kHz的初始捕获,进而通过使用非相干累加适用于微弱信号检测。
To achieve faster GPS C/A acquisition under high dynamic,an acquisition scheme based on parallel matched correlation and FFT is researched.The effects of partial correlations＇ length and FFT points on the performance of C/A code acquisition are discussed.The relationship of coherent combining loss,partial correlation size and Doppler frequency shift is derived.Simulation and hardware verification shows that： This method can make full use of the advantages of parallel algorithms,design strategy can be flexible configuration of hardware resources to quickly achieve the dynamic range of ±10 kHz initial capture,and then use non-coherent accumulation for weak signal detection.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2010年第15期123-126,129,共5页
Journal of Wuhan University of Technology
基金
江苏省科技创新与成果转化项目(BE2008096)
