GPS信号捕获策略的研究

Research on GPS signal acquisition strategy

文章在传统GPS信号捕获算法的基础上提出了一种适用于GPS软件接收机的信号捕获策略,它能够准确而有效地搜索捕获到可见的GPS卫星信号,利用并行码相位快速搜索算法对GPS信号进行快速初捕获,使用N-M检测算法对被捕获结果进行确认,再做进一步的优化,从而得到真实可靠的捕获数据,以供信号跟踪阶段使用。

In this paper, a new signal acquisition strategy is proposed based on the traditional acqulst- tion algorithm of global positioning system（GPS） signal in order to adapt to the development of the software-defined GPS receiver. It can acquire the useful GPS signal effectively and accurately. A par- allel code search algorithm is used to promote the speed of GPS signal acquisition, and a ＂ M on N ＂ statistic approach is used in order to increase the reliability of acquisition, reducing the probability of false detection. In order to increase the acquisition accuracy, a refinement is performed finally. The acquisition results can be used in signal tracking stage.