基于多臂赌博机的频率捷变雷达在线决策方法  

Online Decision-making Method for Frequency-agile Radar Based on Multi-Armed Bandit

作　　者：朱鸿宇 何丽丽 刘峥[1] 谢荣[1] 冉磊[1] ZHU Hongyu;HE Lili;LIU Zheng;XIE Rong;RAN Lei(National Key Laboratory of Radar Signal Processing,Xidian University,Xi’an 710071,China;Jiangnan Design Institute of Machinery and Electricity,Guiyang 550009,China)

机构地区：[1]西安电子科技大学雷达信号处理全国重点实验室,西安710071 [2]江南机电设计研究所,贵阳550009

出　　处：《雷达学报（中英文）》2023年第6期1263-1274,共12页Journal of Radars

基　　金：雷达信号处理全国重点实验室支持计划(KGJ202205)。

摘　　要：频率捷变技术发挥了雷达在电子对抗中主动对抗优势,可以有效提升雷达的抗噪声压制式干扰性能。然而,随着干扰环境的日益复杂,在无法事先了解环境性质的情况下,设计一种具有动态适应能力的频率捷变雷达在线决策方法是一个具有挑战性的问题。该文根据干扰策略的特征,将压制式干扰场景分为3类,并以最大化检测概率为目标,设计了一种基于多臂赌博机(MAB)的频率捷变雷达在线决策方法。该方法是一种在线学习算法,无需干扰环境的先验知识和离线训练过程,在不同干扰场景下均实现了优异的学习性能。理论分析和仿真结果表明,与经典算法和随机捷变策略相比,所提方法具有更强的灵活性,在多种干扰场景下均能够有效提升频率捷变雷达的抗干扰和目标检测性能。Frequency agile technology provides full play to the advantage of radars for adopting electronic countermeasures actively,which can effectively enhance the antinoise suppression jamming performance of radars.However,with the increasing complexity of the interference environment,developing an online decision-making method for frequency-agile radar with dynamic adaptability and without foresight of the nature of the environment is a demanding task.According to the features of the jamming strategy,suppression jamming scenarios are divided into three categories,and an online decision-making method for frequency-agile radar based on Multi-Armed Bandit(MAB)is developed to maximize the radar’s detection probability.This approach is an online learning algorithm that does not need to interfere with the foresight of the environment and offline training process and realizes remarkable learning performance from noninterference scenarios to adaptive interference scenarios.The simulation results and theoretical analysis demonstrate that compared with the classical algorithm and stochastic agile strategy,the proposed method has stronger flexibility and can effectively improve the antijamming and target detection performances of the frequency-agile radar for various jamming scenarios.

关 键 词：频率捷变 噪声压制式干扰 检测概率 多臂赌博机(MAB) 在线学习 

分 类 号：TN95[电子电信—信号与信息处理]