Multi-mode Spread Doppler Clutter Suppression Algorithm of MIMO-OTHR Based on Bi-iterative MVDR Beamformer

Wenqi YU; Jianwen CHEN; Xue LI

doi:10.11999/JEIT180101

Volume 40 Issue 11

Oct. 2018

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Article Navigation > Journal of Electronics & Information Technology > 2018 > 40(11): 2667-2675

SUN Wenjun, RUI Guosheng, ZHANG Yang, CHEN Qiang. Weak Signal Detection Method Based on Dominative Frequency PowerRatio Derived from Systems First-order Perturbation Solution[J]. Journal of Electronics & Information Technology, 2016, 38(1): 160-167. doi: 10.11999/JEIT150510

Citation:

Wenqi YU, Jianwen CHEN, Xue LI. Multi-mode Spread Doppler Clutter Suppression Algorithm of MIMO-OTHR Based on Bi-iterative MVDR Beamformer[J]. Journal of Electronics & Information Technology, 2018, 40(11): 2667-2675. doi: 10.11999/JEIT180101

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Multi-mode Spread Doppler Clutter Suppression Algorithm of MIMO-OTHR Based on Bi-iterative MVDR Beamformer

doi: 10.11999/JEIT180101

Wenqi YU¹,
Jianwen CHEN^{1
,
,},
Xue LI²

1.
Air Force Early Warning Academy, Wuhan 430019, China
2.
China Research Institute of Radio Wave Propagation, Qingdao 266107, China

Funds: The National Natural Science Fundation of China (61471391)

Received Date: 2018-01-24
Rev Recd Date: 2018-06-20

Available Online: 2018-07-16

Publish Date: 2018-11-01

Abstract

Abstract

Spread Doppler Clutter (SDC) caused by multi-mode propagation restrains the detection performance of Over-The-Horizon Radar (OTHR) for low detectable targets, such as slow ships. To solve this problem, a bi-iterative Minimum Variance Distortionless Response (MVDR) beamformer is proposed to suppress multi-mode SDC for MIMO OTHR system. As it is difficult to obtain the signal-free training data and enough sample support in MIMO-OTHR with time-staggered linear frequency modulated continuous wave or slow time phase-coded waveforms, the block matrix is used for data preprocessing to reduce the effect of expected signal component in the training data, then multi-mode SDC could be suppressed by the LN-variate MVDR beamformer which is restored through bi-iterative calculation with an L-variate transmit and an N-variate receive beamformer. This algorithm improves the convergence of MVDR beamformer, while reducing the computational load and the requirement of sample support. Theoretical analysis and simulation experiment are presented to verify the effectiveness of this algorithm.
- Over-The-Horizon Radar (OTHR),
- Spread Doppler Clutter (SDC),
- MIMO,
- Bi-iterative Minimum Variance Distortionless Response (MVDR),
- Multi-mode propagation

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References(20)

References

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