DOA Estimation for Multiple Targets in MIMO Radar with Nonorthogonal Signals

Zhenxin Cao, Peng Chen, Zhimin Chen and Yi Jin

Mathematical Problems in Engineering, 2018, vol. 2018, 1-7

Abstract:

This paper addresses the direction of arrival (DOA) estimation problem in the colocated multiple-input multiple-output (MIMO) radar with nonorthogonal signals. The maximum number of targets that can be estimated is theoretically derived as , where denotes the number of receiving antennas and is the cross-correlation matrix of the transmitted signals. Therefore, with the rank-deficient cross-correlation matrix, the maximum number that can be estimated is less than the radar with orthogonal signals. Then, a multiple signal classification- (MUSIC-) based algorithm is given for the nonorthogonal signals. Furthermore, the DOA estimation performance is also theoretically analyzed by the Carmér-Rao lower bound. Simulation results show that the nonorthogonality degrades the DOA estimation performance only in the scenario with the rank-deficient cross-correlation matrix.

Date: 2018
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Persistent link: https://EconPapers.repec.org/RePEc:hin:jnlmpe:6465856

DOI: 10.1155/2018/6465856

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