GPS信号的快速捕获是设计高动态GPS接收机所必需解决的一项关键技术。在高动态环境下,载体和GPS卫星之间的高速运动使信号产生很大的多普勒频移,同时由于频域带宽的增加,使频域搜索点的个数增多,给接收机快速捕获带来了困难。在分析了传统捕获方法的基础上,研究了在惯性信息辅助下进行快速捕获的方法,结果表明在高动态环境下采用惯性信息辅助GPS接收机捕获的方法可以明显的减少接收机捕获的时间,提高接收机的捕获性能。

The GPS signal fast acquisition is a key technology for high dynamic GPS receiver. Under the high dynamic conditions, the high-speed movement between GPS satellites and carriers generates a large Doppler shift, at the same time, the search point's increase. All of these make it is difficult to capture GPS signal fast. Based on the analysis of traditional acquisition methods, a fast acquisition method aided by inertial information was proposed. The result shows that inertial information aiding can obviously reduce acquisition time and increase the performance of GPS receiver.