NDLI: Low complexity closed-form covariance matrix and direct constant-envelope waveforms design for MIMO radar transmit beampattern

Content Provider	IET Digital Library
Author	Yu, Wenqi Cui, Bingyu
Abstract	Multiple-input multiple-output (MIMO) radar has many advantages over the phased-array radar due to the waveform diversity, one of which is the greater flexibility to design the transmit beampattern. In this Letter, a low-complexity transmit beampattern design method, considering constant envelope (CE) waveforms, is proposed for the uniform linear array MIMO radar. First, the authors parameterise the waveform covariance matrix as the integral form of continuous spatial variable, by exploiting the beamforming weight vector in the main lobe region, to derive the closed-form solution of the waveform covariance matrix that fulfils positive semi-definiteness and uniform elemental power constraints. The transmit beampattern designed by the proposed method has the spatial characteristics of low main lobe fluctuation and peak-to-sidelobe level, and further mathematical explanation is illuminated. Next, they directly use the parameterised expression of waveform covariance matrix, approximately transformed into a discrete form of the spatial variable based on the Riemann integral definition, to efficiently synthesise correlated CE waveforms. The proposed method can provide transmit beampattern performance comparable to existing methods with a lower computational cost and ensure the CE property of the waveforms. The performance of the proposed method is verified and analysed via numerical examples.
Starting Page	1149
Ending Page	1152
Page Count	4
ISSN	00135194
Volume Number	55
e-ISSN	1350911X
Issue Number	Issue 21, Oct (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/el/55/21
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/el.2019.2607
Journal	Electronics Letters
Publisher Date	2019-09-03
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Algebra Antenna Array Array Signal Processing Closed-form Solution Constant Envelope Waveforms Constant-envelope Waveforms Design Correlated CE Waveforms Covariance Matrices Integral Form Low Complexity Closed-form Covariance Matrix Low Main Lobe Fluctuation Low-complexity Transmit Beampattern Design Method MIMO Communication MIMO Radar MIMO Radar Transmit Beampattern Multiple-input Multiple-output Radar Optimisation Technique Phased Array Radar Phased-array Radar Radar Equipment Radar Signal Processing Radio Link And Equipment Signal Processing And Detection System And Application Transmit Beampattern Performance Uniform Elemental Power Constraint Uniform Linear Array MIMO Radar Waveform Covariance Matrix Waveform Diversity
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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