Robust Adaptive Null Broadening Method Based on FDA-MIMO Radar

Beamforming plays an important role in the array radar anti-interference. However, the interference targets with fast speed may move out of the narrow null area of the beampattern. A null broadening method with robust adaptive beamforming for frequency diverse array (FDA)-multiple-input and multiple-output (MIMO) systems is proposed in this paper. The projection preprocessing and windowing functions are applied to obtain stable beampatterns. Then, a novel null broadening method based on the covariance matrix reconstruction is realized by setting artificial fluctuations around each actual jammer. Finally, a new convex optimization model is established and solved to estimate the desired steering vector. Numerical simulations results verify the effectiveness of the proposed method.

[1]  Yaxiu Sun,et al.  Robust Adaptive Beamforming against Signal Steering Vector Mismatch and Jammer Motion , 2015 .

[2]  Hugh D. Griffiths,et al.  Frequency Diverse MIMO Techniques for Radar , 2013, IEEE Transactions on Aerospace and Electronic Systems.

[3]  Wen-Qin Wang,et al.  Phased-MIMO Radar With Frequency Diversity for Range-Dependent Beamforming , 2013, IEEE Sensors Journal.

[4]  C.J. Baker,et al.  Frequency diverse array radars , 2006, 2006 IEEE Conference on Radar.

[5]  Hing Cheung So,et al.  Quasi-Time-Invariant 3-D Focusing Beampattern Synthesis for Conformal Frequency Diverse Array , 2020, IEEE Transactions on Antennas and Propagation.

[6]  Wen-Qin Wang,et al.  Two-stage ESPRIT for unambiguous angle and range estimation in FDA-MIMO radar , 2019, Digit. Signal Process..

[7]  M. Zatman.  Production of adaptive array troughs by dispersion synthesis , 1995 .

[8]  Hui Chen,et al.  Transmit Beamspace Design for Multi-Carrier Frequency Diverse Array Sensor , 2016, IEEE Sensors Journal.

[9]  Teng Long,et al.  Robust Wideband Adaptive Beamforming With Null Broadening and Constant Beamwidth , 2019, IEEE Transactions on Antennas and Propagation.

[10]  Yujie Gu,et al.  Robust Adaptive Beamforming Based on Interference Covariance Matrix Reconstruction and Steering Vector Estimation , 2012, IEEE Transactions on Signal Processing.

[11]  Wen-Qin Wang,et al.  Range-Angle-Dependent Beamforming by Frequency Diverse Array Antenna , 2012 .

[12]  Xianpeng Wang,et al.  A Novel Unitary ESPRIT Algorithm for Monostatic FDA-MIMO Radar , 2020, Sensors.

[13]  Miriam A. Doron,et al.  A linearly constrained minimum variance beamformer with a pre-specified suppression level over a pre-defined broad null sector , 2015, Signal Process..

[14]  Lei Huang,et al.  Joint Range and Angle Estimation Using MIMO Radar With Frequency Diverse Array , 2015, IEEE Transactions on Signal Processing.

[15]  Guisheng Liao,et al.  Deceptive jamming suppression with frequency diverse MIMO radar , 2015, Signal Process..

[16]  Ijaz Mansoor Qureshi,et al.  Frequency Diverse Array Radar With Logarithmically Increasing Frequency Offset , 2015, IEEE Antennas and Wireless Propagation Letters.

[17]  Guisheng Liao,et al.  Robust Null Broadening Beamforming Based on Covariance Matrix Reconstruction via Virtual Interference Sources , 2020, Sensors.

[18]  Michael A. Zatman,et al.  Comments on "Theory and application of covariance matrix tapers for robust adaptive beamforming" [and reply] , 2000, IEEE Trans. Signal Process..

[19]  Bo Li,et al.  Robust minimum dispersion distortionless response beamforming against fast-moving interferences , 2017, Signal Process..

[20]  Teng Long,et al.  Adaptive null broadening method in wideband beamforming for rapidly moving interference suppression , 2018, Electronics Letters.

[21]  Murat Akçakaya,et al.  MIMO Radar Sensitivity Analysis for Target Detection , 2011, IEEE Transactions on Signal Processing.

[22]  Jinye Peng,et al.  Bistatic FDA-MIMO radar space-time adaptive processing , 2019, Signal Process..

[23]  R. J. Mailloux,et al.  Covariance matrix augmentation to produce adaptive array pattern troughs , 1995 .