一种用于干扰抑制的模拟-数字混合自适应波束成形方法

doi:10.12382/bgxb.2024.0703

摘要/Abstract

摘要：

针对传统数字波束成形体制抗干扰容限受制于模拟数字转换器(Analog to Digital Converter,ADC)量化精度问题,提出一种用于压制式干扰抑制的模拟-数字混合自适应波束成形方法。通过在射频端引入模拟波束成形,实现对干扰信号的初步抑制,有效避免信号采样饱和,进一步结合数字波束成形技术,实现对干扰信号的再次抑制。建立了模拟-数字混合自适应波束成形信号模型,分析了抗干扰性能影响因素。仿真结果表明所提方法能够有效减少ADC量化精度的影响,对不同强度干扰均表现出很好的干扰抑制效果,与传统数字波束成形方法相比,抗压制式干扰能力实现了突破。

关键词: 干扰抑制, 自适应波束成形, 模拟数字转换器, 模拟数字混合

Abstract:

The anti-jamming capacity of traditional digital beamforming system is limited by the quantization accuracy of analog-to-digital converter (ADC).To address this situation,this paper proposes a hybrid analog-digital adaptive beamforming method.The interference signals are suppressed preliminarily by introducing the analog beamforming at the radio frequency channel,which prevents sampling saturation.Subsequently,the interference signals are suppressed with the digital beamforming technology.A hybrid analog-digital adaptive beamforming signal model is established.The proposed hybrid analog-digital method is theoretically derived,and its anti-interference performance is analyzed.The simulated results demonstrate that the proposed method can effectively reduce the impact of quantization accuracy and has the excellent performance for different interference intensities.Compared with traditional digital beamforming method,the superiority of the proposed method for blanket jamming suppression is also demonstrated.

Key words: jamming suppression, adaptive beamforming, analog-to-digital converter, hybrid analog-digital

汪俊, 贺小琦, 汪昊, 董宇良, 张雪, 罗涛, 陈鹏. 一种用于干扰抑制的模拟-数字混合自适应波束成形方法[J]. 兵工学报, 2025, 46(7): 240703-.

WANG Jun, HE Xiaoqi, WANG Hao, DONG Yuliang, ZHANG Xue, LUO Tao, CHEN Peng. A Hybrid Analog-digital Adaptive Beamforming Method for Jamming Suppression[J]. Acta Armamentarii, 2025, 46(7): 240703-.

图/表 4

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参数	取值
天线个数	64
阵列形式	均匀平面阵列
天线间隔	半波长
信号个数	1
干扰个数	1~3
干扰类型	宽带压制干扰
信号与干扰夹角	≥20°
信号采样点数	10000
蒙特卡洛次数	1000
ISR范围	0~160dB
SNR默认值	10dB
子阵个数	4
各子阵阵元数	16
模拟波束形成权重	干扰方位正交权重
数字波束成形算法	MVDR
移相器有效量化精度	6bit
衰减器有效量化精度	6bit
ADC有效量化精度	12~14bit

参数	取值
天线个数	64
阵列形式	均匀平面阵列
天线间隔	半波长
信号个数	1
干扰个数	1~3
干扰类型	宽带压制干扰
信号与干扰夹角	≥20°
信号采样点数	10000
蒙特卡洛次数	1000
ISR范围	0~160dB
SNR默认值	10dB
子阵个数	4
各子阵阵元数	16
模拟波束形成权重	干扰方位正交权重
数字波束成形算法	MVDR
移相器有效量化精度	6bit
衰减器有效量化精度	6bit
ADC有效量化精度	12~14bit