基于频控阵MIMO雷达的低复杂度稳健波束形成算法

doi:10.12305/j.issn.1001-506X.2022.11.13

Abstract

Abstract:

Frequency diverse array (FDA) multiple input multiple output (MIMO) radar provides a suppression scheme for mainlobe interference based on the range-dimensional freedom from the transmitter modulation. Combined with the adaptive beamforming algorithm, FDA-MIMO radar can effectively suppress deceptive interference signals within the mainlobe. However, the existing problems such as complex signal environment, steering vector mismatch and insufficient sampling snapshots will deteriorate the performance of the algorithm. To solve the problem, this paper proposes a low-complexity robust adaptive beamforming (RAB) algorithm based on FDA. Simulation experiments show that the proposed algorithm has stronger robustness and lower computational complexity under non-ideal conditions such as low signal-to-noise ratio, low-sampling snapshot and 5-degree steering vector mismatch. Meanwhile, the proposed algorithm effectively achieves the indication of the target and the suppression of interference, and overcomes the performance degradation of other algorithms under non-ideal conditions.

Key words: frequency diverse array (FDA), robust adaptive beamforming, multiple input multiple output (MIMO), non-ideal condition

CLC Number:

TN958

Yibin LIU, Chunyang WANG, Jian GONG, Ming TAN. Low-complexity and robust beamforming algorithm based on frequency diverse array MIMO radar[J]. Systems Engineering and Electronics, 2022, 44(11): 3388-3396.

Figures/Tables 14

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References 30

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波束形成器	计算复杂度
改进ESB算法	$O\left[\frac{4}{3}(M N+1)^3+(M N)^3\right]$
WCPO算法	O[(MN)^3.5]
扩展ESB算法	$O\left[\frac{4}{3}(M N+1)^3+11(M N+1)^3\right]$
本文算法	O[(MN)³]

仿真参数	取值
发射阵元数	16
接收阵元数	16
参考载频/GHz	6
频偏增量/kHz	2
阵元间距/m	0.025
目标坐标	(60 km, 30°)
干扰1坐标	(100 km, 30°)
干扰2坐标	(120 km, 30°)
干扰3坐标	(100 km, －25°)
干扰4坐标	(120 km, －25°)
JNR/dB	60
失配角度/(°)	5

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Low-complexity and robust beamforming algorithm based on frequency diverse array MIMO radar

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