Volume 36, Number 1, February 2018
|Page(s)||182 - 188|
|Published online||18 May 2018|
Spatial Differencing Reconstruction Based Low-Angle DOA Estimation with MIMO Radar
National Laboratory of Radar Signal Processing, Xidian University, Xi'an 710071, China
2 Air and Missile Defense College, Airforce Engineering University, Xi'an 710051, China
Due to the multipath effect, the direction of arrival (DOA) estimation performance for low-angle targets decreases greatly. To overcome this problem, this paper proposes a spatial differencing reconstruction based DOA estimation algorithm by using the received signal model of multiple input multiple output (MIMO) radar. Combining with the spatial diversity of MIMO radar, the proposed method can first use the multipath echo power to select the best signal. Then, a spatial differencing based iterative scheme is developed to reduce the effect of additive noise, resulting in a better estimation performance for low-angle targets. Simulation results show that the proposed method has better advantages in suppressing noise and improving estimation accuracy.
Key words: MIMO radar / multipath effect / spatial differencing reconstruction / DOA estimation
关键字 : MIMO雷达 / 多径效应 / 空间差分重构 / DOA估计
© 2018 Journal of Northwestern Polytechnical University. All rights reserved.
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