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      Distributed MIMO Radar Monopulse Angular Estimation

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          Abstract

          The linear zone of the S-curve, which is formed with the digital beamforming (DBF) method, is extremely narrow for monopulse angle measurements with distributed Multiple-Input and Multiple-Output (MIMO) radar. Based on the transmitting-receiving beam pattern without gratelobe, the DBF method is proposed to form the ΣΔ-beam by using the absolute value of the echo signal. The ideal null depth can be achieved and the linear zone of the S-curve is expanded because the main lobe of the Δ-beam is enveloped by the Σ-beam. The monopulse angle for a target with high angle velocity was estimated. When the Signal-to-Noise Ratio (SNR) was higher than -15 dB , the accuracy of the proposed method was better than that of conventional methods. When the SNR was equal to -15 dB , the accuracy of the proposed method was similar to conventional methods that use coherent integration before taking the absolute value of the echo signal.

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          Author and article information

          Journal
          Journal of Radars
          Chinese Academy of Sciences
          01 August 2014
          : 3
          : 4
          : 474-479
          Affiliations
          [1 ] (No.23 Institute of the Second Academy, CASIC, Beijing 100854, China)
          [2 ] (China Aerospace Science and Industry Corporation, Beijing 100048, China)
          Article
          936a24e794b84d5c9e571620495ae134
          10.3724/SP.J.1300.2014.13077

          This work is licensed under a Creative Commons Attribution 4.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

          Categories
          Technology (General)
          T1-995

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