基于FRFT的LFM信号时延估计分析与仿真  

Analysis and Simulation of LFM Signal Delay Estimation Based on FRFT

作　　者：宋健 周骅 

机构地区：[1]贵州大学大数据与信息工程学院,贵州 贵阳

出　　处：《建模与仿真》2024年第2期1004-1016,共13页Modeling and Simulation

摘　　要：根据分数阶傅里叶变换对线性调频(LFM)信号的独特聚集性,研究了基于分数阶傅里叶变换LFM信号时延估计,并给出了目标测距具体实现。针对接收端接收到的信号是实信号干扰时延估计的问题,采用正交下变频构造解析信号用以进行时延估计。最后通过仿真实验,验证了基于FRFT的LFM信号时延估计可行性和有效性,为目标距离检测提供了研究思路。Based on the unique aggregation of fractional order Fourier transform on linear frequency modula-tion (LFM) signals, the time delay estimation of LFM signals based on fractional order Fourier trans-form was studied, and the specific implementation of target ranging was provided. In response to the problem of real signal interference in time delay estimation received by the receiving end, or-thogonal down conversion is used to construct an analytical signal for time delay estimation. Finally, through simulation experiments, the feasibility and effectiveness of LFM signal delay estimation based on FRFT were verified, providing research ideas for target distance detection.

关 键 词：时延估计 分数阶傅里叶变换 解析信号 正交下变频 

分 类 号：TN9[电子电信—信息与通信工程]