Minimax robust jamming techniques based on signal-to-interference-plus-noise ratio and mutual information criteria
Minimax robust jamming techniques based on signal-to-interference-plus-noise ratio and mutual information criteria
复制标题
基于信号干扰加噪声比和互信息准则的极小极大鲁棒干扰技术
DOI：
10.1049/iet-com.2013.1054
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发表时间：
2014-07-03
影响因子：
1.6
通讯作者：
Brennan, Paul V.
中科院分区：
文献类型：
--
作者：
Wang, Lulu;Wang, Hongqiang;Brennan, Paul V.
由于先进的信号处理对抗措施，国防应用中的干扰越来越困难。在这项研究中，任务相关的功率约束的最佳干扰技术进行了研究。为了防止目标被检测到，提出了一种新的干扰技术，以最小化的信号与干扰加噪声比（SINR）的雷达扩展已知和随机目标。为了削弱参数估计性能，提出了另一种干扰技术，它最小化雷达回波和随机目标冲激响应之间的互信息（MI）。在干扰机截获雷达波形的前提下，得到了最优干扰频谱。然而，在实际应用中，雷达波形的精确特征是不可能捕捉到的。为了对此进行建模，认为波形谱位于由已知的上界和下界限定的不确定性类中。然后，基于信干噪比和互信息准则设计了最小最大鲁棒干扰，使干扰系统在最坏情况下的性能得到优化。仿真结果表明，两种准则得到的最优干扰结果不同，但它们与香农容量方程有着密切的关系，香农容量方程为不同干扰任务的干扰功率分配提供了有益的指导。然而，它们关于波形不确定性的行为是相同的。
Jamming in defence applications is increasingly difficult because of advanced signal processing countermeasures. In this study, task-dependent power-constraint optimal jamming techniques are investigated. To prevent the target from being detected, a novel jamming technique is proposed to minimise the signal-to-interference-plus-noise ratio (SINR) of the radar for extended known and stochastic target. To impair the parameter estimation performance, another jamming technique is proposed which minimises the mutual information (MI) between the radar return and the stochastic target impulse response. The optimal jamming spectrum is obtained assuming that the jammer has intercepted the radar waveform generally. However, the precise characteristic of radar waveform is impossible to capture in practice. To model this, it is considered that the waveform spectrum lies in an uncertainty class confined by known upper and lower bounds. Then, the minimax robust jamming is designed based on the SINR and MI criteria, which optimises the worst-case performance. Results demonstrate that the two criteria lead to different optimal jamming results but they have a close relationship from the Shannon's capacity equation which provides useful guidance on jamming power allocation for different jamming tasks. However, their behaviour with respect to the waveform uncertainty is the same.