基于改进遗传算法的GPS信号捕获方法

摘要

In order to solve the problem of GPS signal acquisition, an acquisition algorithm in this article based on improved genetic algorithm is proposed. The genetic algorithm uses a dynamic parameter encoding and adaptive distribution of the individual to determine the probability of crossover and mutation, optimize the parameters of Doppler frequency shift and code phase in the signal acquisition. Simulations and experiment results show that the proposed method can acquire the signal parameters precisely and rapidly, thereby increasing the capture performance.%文章针对GPS信号的捕获问题，提出了一种基于改进遗传算法的信号捕获方法。该遗传算法采用了动态参数编码以及个体分布情况自适应确定交叉变异概率，对信号捕获中的多普勒频移和码相位这对参数进行优化。仿真实验结果表明，该算法成功捕获到GPS信号中多普勒频移和码相位，并具有较高的准确度和捕获效率，从而提高了捕获性能。