通信对抗中的自适应滤波技术

自适应滤波是在维纳滤波和Kalman滤波等线性滤波基础上发展起来的一种最佳滤波方法,具有较强的适应性和较优的滤波性能。这里将自适应滤波技术应用于电子对抗领域,利用自适应滤波原理计算出一个数字滤波器,对各信道的增益失配与相移失配进行精确的通道均衡补偿;利用自适应滤波方法设计具有特定频率响应的FIR滤波器,可实现时域宽带波束形成技术,并实现了基于自适应滤波的同平台干扰抵消技术。

AdaptiveFiltering Technique in Communication Countermeasures

The adaptive filtering technique is an optimal filtering method developed from the linear filters such as wiener filtering,Kalman filtering etc.,with strong adaptability and good filtering performance.Here,the adaptive filtering technique is applied to electronic countermeasures.The digital filter is calculated based on adaptive filtering principle,solving amplitude variation and phase shifting mismatching.A method to design a finite impulse response（FIR） filter with specific frequency response by use of adaptive method,and the filter to be used in time-domain broadband beamformer are studied.And the interference cancellation technique for intra-platform based on the adaptive filtering technique is also achieved in this paper.