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.
Fast Angle Estimation for MIMO Radar With Nonorthogonal Waveforms
IEEE Transactions on Aerospace and Electronic Systems ; 54 , 4 ; 2091-2096
2018-08-01
587176 byte
Article (Journal)
Electronic Resource
English
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