一种GPS软件接收机的频域粗同步算法研究

摘要

粗同步时间是衡量同步算法的重要指标之一,为了在较短的时间内完成粗同步,达到对导航信号的精同步的目的,在对时域粗同步算法工作机理深入研究的基础上,提出了一种GPS软件接收机的频域粗同步算法,并通过仿真得出在两种算法都能正确捕获导航信号的前提条件下,频域粗同步算法较时域粗同步算法同步时间短的结果,从而进一步验证了该算法的时效性、合理性,为今后开发GPS接收机应用平台提供了现实依据.%Coarse synchronization time is one of important indexes to measure synchronization algorithm. To complete coarse synchronization within shorter time and achieve purpose of refined synchronization for navigation signal, on the basis of intensive study for working mechanism of time domain coarse synchronization algorithm* a kind of frequency domain coarse synchronization algorithm for GPS software receiver is proposed, and through simulation, a result that synchronization time for frequency domain coarse synchronization algorithm is shorter than that for time domain synchronization algorithm can be obtained under premise condition that two algorithms can correctly seize navigation signal, and thus it has further proved timeliness and rationality for this algorithm and provided realistic basis for later development of application platform for GPS receiver.