为了实现高动态条件下对导航信号的快速捕获,以分段相关与FFT相结合的快速捕获方法为基础,研究了一种改型匹配滤波器的实现结构,对该结构进行了Matlab仿真,在仿真的基础上实现了FPGA设计。仿真和综合结果表明,采用改型匹配滤波器、分段相关、FFT相结合的快捕结构,显著提高了捕获速度、减少了捕获时间,同时节约了硬件逻辑资源。试验结果表明,该方法是一种有效的快捕方法。 In order to realize the fast capture of navigation signals under high dynamic conditions, the realization structure of a modified matched filter is studied based on the fast acquisition method combining segment correlation with FFT. The Matlab simulation of the structure is carried out. Based on the simulation to achieve the FPGA design. The results of simulation and synthesis show that the fast-trapping structure with modified matched filter, piecewise correlation and FFT can significantly improve the acquisition speed, reduce the acquisition time and save the hardware logic resources. The experimental results show that the method is an effective method of rapid trapping.