Structure Design of Wideband Receiver Based on Two-stage Dynamic Channelization

Because of the superior performance, channelized receivers are widely used in modern electronic warfare. However, traditional channelization often has certain blindness in channel division, and it is difficult to ensure the average signal-to-noise ratio (SNR) while avoiding cross-channel. This article focuses on large instantaneous bandwidth scenarios, and a more flexible two-stage channelization design scheme is proposed. First, for different bandwidth signal, this design scheme can divide and conquer as much as possible in the frequency domain by the dichotomy filter bank; after that, a four-channel polyphase filter bank is used for finer signal processing. This scheme can maximize the average bandwidth ratio of signals in the sub-channel, so that the average output SNR of the signal can be maximized without cross-channel, so as to achieve higher quality channeled reception.