Abstract
In this paper,we study the accuracy of delay-Doppler parameter estimation of targets in a passive radar using orthogo-nal frequency division multiplexing(OFDM)signal.A coarse-fine joint estimation method is proposed to achieve better estima-tion accuracy of target parameters without excessive computa-tional burden.Firstly,the modulation symbol domain(MSD)method is used to roughly estimate the delay and Doppler of tar-gets.Then,to obtain high-precision Doppler estimation,the atomic norm(AN)based on the multiple measurement vectors(MMV)model(MMV-AN)is used to manifest the signal sparsity in the continuous Doppler domain.At the same time,a reference signal compensation(RSC)method is presented to obtain high-precision delay estimation.Simulation results based on the OFDM signal show that the coarse-fine joint estimation method based on AN-RSC can obtain a more accurate estimation of tar-get parameters compared with other algorithms.In addition,the proposed method also possesses computational advantages compared with the joint parameter estimation.
基金项目
国家自然科学基金(61931015)
国家自然科学基金(62071335)
Technological Innovation Project of Hubei Province of China(2019AAA061)
湖北省自然科学基金(2021CFA002)
NETL
NSTL
维普
万方数据