一种动态调制滤波器组高效结构设计

Design of an efficient structure for dynamic modulated filter banks

在电子侦察领域中,由于脉冲压缩雷达信号带宽越来越宽,这就要求电子侦察接收机也应具有较大的瞬时带宽,然而较大的瞬时带宽会导致接收机灵敏度降低。针对该问题,提出一种动态调制滤波器组高效结构设计方法。通过对信号精确重构条件的分析,采用迭代算法设计动态调制滤波器组的原型低通滤波器,并构造出一种动态调制滤波器组高效结构,计算机仿真结果验证了该动态调制滤波器组高效结构可近似精确重构原始信号。该高效结构在降低计算量的同时,提高了接收机的灵敏度。

The bandwidth of the pulse compression radar signal becomes wider in electronic reconnaissance field, therefore it is required that the electronic reconnaissance receiver should have the wider instantaneous bandwidth, which may reduce the sensitivity of the receiver. Aiming at this problem, an efficient structure design method of the dynamic modulated filter banks is proposed. By analyzing the signal accurate reconstruction conditions, the iterative algorithm is used to design the prototype lowpass filter of the dynamic modulated filter banks, and an efficient structure of the dynamic modulated filter banks is constructed. The computer simulation result shows that the efficient structure of the dynamic modulated filter banks can reconstruct the original signal accurately. The efficient structure can reduce the computation quantity, and improve the sensitivity of the receiver.