INS辅助的PMF-FFT快速捕获算法  

Research on Fast Acquisition Algorithm Based on PMF-FFT with INS-Aided

作　　者：汤霞清[1] 程旭维[1] 武萌[1] 高军强[1] TANG Xia-qing;CHENG Xu-wei;WU Meng;GAO Jun-qiang(Academy of Armored Force Engineering,Beijing 100072,China)

机构地区：[1]装甲兵工程学院,北京100072

出　　处：《火力与指挥控制》2017年第8期128-131,135,共5页Fire Control & Command Control

基　　金：军队科研计划基金资助项目

摘　　要：为了快速地捕获卫星信号,研究了部分匹配滤波(Partial Matched Filter,PMF)算法及其参数选择依据。采用惯性导航系统(INS)辅助的PMF-FFT捕获算法,该算法首先利用惯性导航系统信息缩小信号捕获的2维搜索范围;同时,为改善PMF-FFT捕获算法的性能,在PMF过程中采用窗函数加权积分。结果表明,该捕获算法能够大幅减小平均捕获时间;且加窗后的PMF-FFT算法捕获性能更优。Aimed to acquire the GNSS signal faster,PMF algorithm and its parameters setting areanalyzed.PMF-FFT algorithm with INS-aiding is adopted,which narrows the2-D search rangesubstantially.To improve acquiring performance of the algorithm,the weighted means by Windowfunction is employed,then,the algorithm performance is analyzed.Experimental results show that themethod with INS-aiding greatly decrease average acquisition time.The PMF-FFT algorithm with theWindows is more effective than traditional algorithms.

关 键 词：信号捕获 惯性导航辅助 部分匹配滤波 快速傅里叶变换 

分 类 号：V249.322[航空宇航科学与技术—飞行器设计]