Super-Resolution TOA and AOA Estimation for OFDM Radar Systems Based on Compressed Sensing

被引：16

作者：

Wu, Min ^{[1
]}

Hao, Chengpeng ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst Acoust, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100190, Peoples R China

来源：

IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS | 2022年 / 58卷 / 06期

基金：

中国国家自然科学基金;

关键词：

OFDM; Radar; Estimation; Delay effects; Superresolution; Signal processing algorithms; Antenna arrays; Angle of arrival (AOA); compressed sensing (CS); orthogonal frequency division multiplexing (OFDM); parameter estimation; super-resolution; time of arrival (TOA); DOA ESTIMATION; DIRECTION;

D O I：

10.1109/TAES.2022.3178393

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

This article presents a compressed sensing-based time of arrival (TOA) and angle-of-arrival (AOA) estimation algorithm for orthogonal frequency division multiplexing (OFDM) radar systems. The algorithm is designed for noncooperative targets based on a uniform linear array using a cyclic prefix (CP) added OFDM signal. The algorithm makes three key technical contributions. First, the algorithm adopts the CP-based OFDM signal for the radar TOA/AOA estimation to suppress the multitarget interference and the impact of time delay on the subcarrier orthogonality. Second, this article exploits the structure of the CP-OFDM radar signal model to construct the optimization problem of the joint TOA/AOA recovery. The super-resolution AOA estimation is obtained by using a redundant dictionary containing much more basis than the number of antennas. Third, the algorithm proposes an efficient way to solve the optimization by utilizing the properties of the circulant matrix, fast Fourier transform, and Hadamard multiplication. The simulation results indicate the effectiveness of the proposed algorithm.

引用

页码：5730 / 5740

页数：11

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