Beampattern matching in colocated MIMO radar using transmit covariance matrix design

• Published in: Signal processing Vol. 194; p. 108440
• Main Authors: Ai, Xiaoyu, Gan, Lu
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.05.2022
• Subjects: Beampattern matching; Colocated MIMO radar; Covariance matrix design; Spatial power control; Colocated MIMO radar; Covariance matrix design; Spatial power control; Beampattern matching
• ISSN: 0165-1684; 1872-7557
• DOI: 10.1016/j.sigpro.2021.108440

•The proposed algorithm can precisely control the spatial power of multiple-input multiple-output (MIMO) radar beampattern.•The transmit covariance matrix is constructed as a novel form, and the procedure of beampattern matching is computationally efficient.•The average power and positive semidefiniteness constraints on the designed covariance matrix are fulfilled.•The proposed algorithm can synthesize desired beampatterns with a small number of iterations, and the computational complexity of the proposed algorithm is much lower than that of the optimization-based methods. The common problem in the multiple-input multiple-output (MIMO) radar is that the beampattern matching realized by the optimization-based algorithms would lead to high computational complexity. Using the presented transmit covariance matrix design (TCMD) algorithm, the efficiency of MIMO radar beampattern matching can be improved drastically. In this paper, the designed covariance matrix (CM) is constructed as an iterative form, and the appropriate power factor is designed in closed-form to realize accurate spatial power control and guarantee the positive semidefiniteness of the design CM. Moreover, the beampattern matching is realized by successively adjusting the spatial power at the directions where the specifications are not satisfied. Numerical results of accurate spatial power control and beampattern matching are carried out to show the effectiveness and efficiency of the presented TCMD algorithm.