现代电子技术2026，Vol.49Issue(1)：21-26,6.DOI:10.16652/j.issn.1004-373x.2026.01.004
低轨卫星捕获算法的优化与FPGA实现
Optimization and FPGA implementation of LEO satellite capture algorithm
摘要
Abstract
The LEO(low earth orbit)satellite communication-navigation integrated system integrated with BDS(BeiDou navigation satellite system)can effectively improve the navigation-positioning and communication capabilities of China's satellite system.However,the high-speed motion of the LEO satellite terminal leads to greater Doppler frequency offset,which increases the difficulty of signal acquisition.In order to capture communication-navigation integrated signals fast and accurately,this paper takes the signals with greater Doppler frequency offset caused by high dynamics of LEO satellites as the research object,and verifies the optimization effect of PMF-FFT(partial matched filter-fast Fourier transform)algorithm combined with zero padding method and windowing method by the Matlab.The optimized structure can increase the capture peak value by 64.7%.Then the traditional PMF-FFT acquisition algorithm is optimized by determining the window function and the number of zero padding.The FFT module is improved to make it reconfigurable to adapt to the different number of zeros.In this paper,Verilog HDL is used to implement the optimized PMF-FFT algorithm.The correctness and effectiveness of the optimized algorithm have been confirmed by simulation waveform and experimental results from Vivado.To sum up,the proposed algorithm has more advantages in the field of UAV aerial object detection.It provides theoretical support for LEO satellite acquisition.关键词
低轨卫星/通导一体化/多普勒频偏/PMF-FFT/加窗/补零/可重构FFT/FPGA实现Key words
LEO satellite/communication-navigation integration/Doppler frequency offset/PMF-FFT/windowing/zero padding/reconfigurable FFT/FPGA implementation分类
信息技术与安全科学引用本文复制引用
杨虹,赵汝法,杨天昊,郑斌,曾令昕,马壮,谭红涛,周海洋,李颖,黎淼..低轨卫星捕获算法的优化与FPGA实现[J].现代电子技术,2026,49(1):21-26,6.基金项目
重庆市技术创新与应用发展专项重大项目(CSTB2023TIAD-STX0023) （CSTB2023TIAD-STX0023）
重庆市自然科学基金创新发展联合基金(中国星网)(CSTB2023NSCQ-LMX0022) （中国星网）
