A Joint Range-Angle Estimation Method for Meter-Wave FDA-MIMO Radar at Very Low Altitude Targets Based on Direct Wave Matching
WANG Hongzhen
LIU Yibin
CHEN Chen
Abstract：In research and application of meter-wave radar technology,detecting low-altitude target is al-ways a highly challenging topic.Based on the specular reflection signal model of a monostatic meter-wave FDA-MIMO radar,and in view of the problem that accuracy in the joint range-angle estimation of ultra-low-altitude targets by the maximum likelihood(ML)and generalized multiple signal classification(GMU-SIC)algorithms is insufficient,a direct-wave matching multiple signal classification(DM-MUSIC)algo-rithm is proposed.This algorithm is to construct a direct-wave matching matrix to effectively eliminate the interference of reflected waves on the direct wave,and then restore the performance of the traditional MU-SIC algorithm.The results of simulation experiments show that under conditions of ultra-low-altitude,the DM-MUSIC algorithm has the best spatial spectrum resolution performance.Its joint range-angle estima-tion accuracy is significantly better than that of the ML and GMUSIC algorithms,and is also low in com-putational complexity.This enables the algorithm to process data more quickly and achieve more efficient detection and tracking of ultra-low-altitude targets.And this provides a feasible solution for the practical application of meter-wave radars in the field of low-altitude detection and has important value in both theo-retical research and practical applications.
Keywords：meter wavefrequency diverse arrayMIMO radarcoherent signaldirect wave matching
Publication Date：2025-12-25
Online Publishing Date：2025-12-26(First online date of this platform, not the publication date of the document)
Pages：9( 56-64 )