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航天测控系统中,高动态目标会产生大的多普勒频移,利用PMF-FFT算法进行伪码同步捕获对硬件资源需求较多,伪码捕获时间长。针对此问题,提出基于PMF-FFT的多普勒频率分段捕获算法,将大的多普勒频率范围平均划分为多个小段,对各子频率区间进行多路并行运算,缩减了FFT尺寸,减少了硬件资源消耗,加快捕获速度。计算机仿真和分析验证了算法的有效性。
Aerospace measurement and control system, the high dynamic target will have a large Doppler shift, the use of PMF-FFT algorithm for synchronization of pseudo-code capture hardware resources more demand, pseudo-code capture a long time. To solve this problem, a Doppler frequency segmentation algorithm based on PMF-FFT is proposed. The large Doppler frequency range is divided equally into several small segments. Multiple parallel operations are performed on each sub-frequency range to reduce the FFT size. Reduce hardware resource consumption and speed up capture. Computer simulation and analysis verify the effectiveness of the algorithm.