Work

A Grating Lobe Near-Field Image Enhancement Method: Sparse Reconstruction Based on Alternating Direction Method of Multipliers

Year: 2025

Type: article

Abstract: In this study, a new sparse reconstruction algorithm based on near-field imaging is proposed to solve the grating lobe problem arising from sparse arrays. It derives the expression of the steering vector under near-field conditions and formulates the optimization problem. Moreover, the problem, by using the alternating direction method of multipliers (ADMM), is efficiently solved. Experiment results indicate that, in comparison to existing methods such as the phase coherent factor (PCF) and sum and difference beams, the proposed method significantly reduces the impact caused by grating lobes in near-field imaging. In addition, the proposed algorithm is accelerated by the ADMM, which significantly reduces the computational time. This work offers a perspective and potential solution to enhance grating lobe images.

Source: Electronics

DOI: 10.3390/electronics14081514

Authors: Yuanhao Wang, Jun Wang, Penghui Chen, Guidong He, Jiacheng He

Institution: Beihang University

Language: English

Topic: Direction-of-Arrival Estimation Techniques

Subfield: Signal Processing

Field: Computer Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,896

Funder: Key Research and Development Program of Zhejiang Province