An ADMM-qSPICE-Based Sparse DOA Estimation Method for MIMO Radar

Abstract

In recent years, sparse direction-of-arrival (DOA) estimation for multiple-input multiple-output (MIMO) radar has attracted extensive attention and been extensively studied, especially the method based on the classic least absolute shrinkage and selection operator (LASSO) estimator. The alternating-direction method of multipliers (ADMM) is an effective method for solving this problem at the cost of introducing an additional user parameter. To avoid introducing an additional user parameter, this paper adopts an equivalent transformation in the form of the generalized SParse Iterative Covariance-based Estimation (qSPICE) cost function to obtain a mean squared minimized form of the cost function. Then, the problem is transformed into a sparse optimization problem in the form of a weighted LASSO. Next, this unconstrained optimization problem is decomposed into three subproblems, which are solved separately to reduce the dimension of each problem and thus reduce the overall computational complexity based on ADMM. Simulation results and measured data indicate that the proposed method significantly outperforms the traditional super-resolution DOA estimation method and ADMM-LASSO method and slightly outperforms qSPICE in terms of resolution and sidelobe suppression capability. In addition, the proposed method has a much lower computational complexity and substantially fewer iterations than qSPICE.

A Bayesian Deep Unfolded Network for the Off-Grid Direction-of-Arrival Estimation via a Minimum Hole Array

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Multi-dimensional parameter estimation of uniform circular array electromagnetic vector sensor based on polarization-direction of arrival matrix

“…In the past few decades, direction of arrival (DOA) estimation has been demonstrated to play a significant role in radar, 1 – 3 communication, 4 , 5 seismic survey, 6 , 7 and other fields as an important branch of signal processing. Electromagnetic vector sensor (EVS), 8 which can not only provide the spatial orientation information of electromagnetic waves but also receive the polarization information, has gained huge success in the field of radar array signal processing 9 …”

Method of locating a target with a Mimo radar distributed at the international airport of Ndjili in Kinshasa

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