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Fast Angle Estimation for MIMO Radar With Nonorthogonal Waveforms | IEEE Journals & Magazine | IEEE Xplore

Fast Angle Estimation for MIMO Radar With Nonorthogonal Waveforms


Abstract:

In this letter, a fast angle-estimation method for multiple-input-multiple-output radar with nonorthogonal waveforms is devised. This method first estimates the noise-fre...Show More

Abstract:

In this letter, a fast angle-estimation method for multiple-input-multiple-output radar with nonorthogonal waveforms is devised. This method first estimates the noise-free covariance matrix by exploiting its low-rank property as well as the sparse structure of the noise-covariance matrix. A subspace-based procedure is then developed to determine the directions-of-arrival (DOAs) based on the matrix composed of the principal eigenvectors of the noise-free covariance-matrix estimate. Compared with the state-of-the-art prewhitening algorithm, the proposed method does not need the knowledge of the correlation matrix of transmitted waveforms. Moreover, it is computationally attractive since the DOAs can be estimated in closed form. In addition, the proposed method offers promising DOA-estimation performance as verified by simulation results.
Published in: IEEE Transactions on Aerospace and Electronic Systems ( Volume: 54, Issue: 4, August 2018)
Page(s): 2091 - 2096
Date of Publication: 15 June 2018

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