基于动态波束赋形的雷达搜索资源优化方法

doi:10.7527/S1000-6893.2026.33261

Abstract

Abstract:

To improve the fast search capability of digital array radar in the Broad-Transmit Multi-Receive mode， an optimization method for search resources based on dynamic beamforming is proposed. First， to address the beam distortion problem in the angular domain， the beam search space is transformed into the direction cosine coordinate system to effectively combine beam pointing with scanning loss. A shaped beam model is established based on the analysis of energy requirements of each beam， and the expressions for the shape and directional gain of the shaped beam are derived based on the beam grid. Then， a joint optimization model of beam-dwell time is constructed with the objective function of minimizing the search frame period， which achieves fast search by dynamically adjusting the beam dwell time and beam shape. In addition， a targeted preprocessing strategy and solution method are designed. Finally， the effectiveness of the proposed optimization method is verified by simulation. Results show that the proposed dynamic beamforming method can achieve effective coverage of the airspace with a small number of beams， and the search frame period can be shortened by more than 32.35% compared with the conventional sequential beam-position scanning method. This paper provides a reference for the application of shaped beams in digital array radar systems.

Key words: digital array radar, search frame period, broad-transmit multi-receive, dwell time, beamforming

CLC Number:

V412.1

Xuchao HU, Xiansi TAN, Zhiguo QU, Zhihuai LI, Zhangyu PENG. Optimization method for radar search resources based on dynamic beamforming[J]. Acta Aeronautica et Astronautica Sinica, 2026, 47(17): 333261.

Figures/Tables 19

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Table 1

Simulation parameters

参数	数值
阵元数	$20 × 20$
阵元间隔/m	0.5 $λ$
波长 $λ$ /m	0.1
阵面倾斜角 $ε$ /（°）	10
雷达平均功率 $P a v$ /kW	10
系统损耗 $L s$ /dB	6
噪声系数 $F$ /dB	3
接收机带宽B/MHz	1
检测因子 $D 0$ /dB	13
俯仰角范围 $β$ /（°）	［0，60］
方位角范围 $α$ /（°）	［-60，60］
基准波束最大增益 $G 0$ /dB	40

Table 1

Fig.10

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Table 2

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References 21

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方案	波位数						搜索帧周期/s
方案	t_w =0.1 ms	t_w =0.15 ms	t_w =1.5 ms	t_w =2.5 ms	t_w =3.5 ms	总数	搜索帧周期/s
方案1	12	4	2	3	26	47	0.103 5
方案2	12	4	2	3	26	47	0.103 5

Optimization method for radar search resources based on dynamic beamforming

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