A Sparse Bayesian Learning-Based DOA Estimation Method With the Kalman Filter in MIMO Radar
1
School of Electronic Science and Engineering, Nanjing University, Nanjing 210023, China
2
Nanjing Institute of Electronic Technology, Nanjing 210000, China
*
Author to whom correspondence should be addressed.
Electronics 2020, 9(2), 347; https://doi.org/10.3390/electronics9020347
Received: 25 January 2020 / Revised: 12 February 2020 / Accepted: 14 February 2020 / Published: 18 February 2020
(This article belongs to the Special Issue Recent Advances in Array Antenna and Array Signal Processing)
The direction of arrival (DOA) estimation problem as an essential problem in the radar system is important in radar applications. In this paper, considering a multiple-input and multiple-out (MIMO) radar system, the DOA estimation problem is investigated in the scenario with fast-moving targets. The system model is first formulated, and then by exploiting both the target sparsity in the spatial domain and the temporal correlation of the moving targets, a sparse Bayesian learning (SBL)-based DOA estimation method combined with the Kalman filter (KF) is proposed. Moreover, the performances of traditional sparse-based methods are limited by the off-grid issue, and Taylor-expansion off-grid methods also have high computational complexity and limited performance. The proposed method breaks through the off-grid limit by transforming the problem in the spatial domain to that in the time domain using the movement feature. Simulation results show that the proposed method outperforms the existing methods in the DOA estimation problem for the fast-moving targets.
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Keywords:
MIMO radar; sparse Bayesian learning; Kalman filter; direction of arrival; fast-moving targets
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MDPI and ACS Style
Liu, S.; Tang, L.; Bai, Y.; Zhang, X. A Sparse Bayesian Learning-Based DOA Estimation Method With the Kalman Filter in MIMO Radar. Electronics 2020, 9, 347. https://doi.org/10.3390/electronics9020347
AMA Style
Liu S, Tang L, Bai Y, Zhang X. A Sparse Bayesian Learning-Based DOA Estimation Method With the Kalman Filter in MIMO Radar. Electronics. 2020; 9(2):347. https://doi.org/10.3390/electronics9020347
Chicago/Turabian StyleLiu, Song; Tang, Lan; Bai, Yechao; Zhang, Xinggan. 2020. "A Sparse Bayesian Learning-Based DOA Estimation Method With the Kalman Filter in MIMO Radar" Electronics 9, no. 2: 347. https://doi.org/10.3390/electronics9020347
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