高效数字信道化IFM接收机的研究

Efficient Digital Channelized IFM Receiver Research

采用一种具有普遍性的推导方法得到基于DFT多相滤波器组的宽带数字信道化接收机高效结构,并且将瞬时测频技术应用于该结构中,提出了一种数字信道化瞬时测频接收机方案。计算机仿真表明:该方案提高了信道化接收机的频率分辨率,能够分辨同时落入一个信道的两个信号,而且运算复杂度低,硬件实现效率高,是能适应现代电子战中密集的信号环境的一种高效侦察接收机方案。

In this paper, we use a common deducing method to acquire an efficient arcmtecture based DFT polyphase filter banks to realize wideband digital channelized receiver. Furthermore, by applying instantaneous frequency measurement （IFM） technology to that architecture, an approach of digital channelized IFM receiver is proposed. The simulation in MATLAB software indicates that approach has increased frequency resolution of channelized receiver to distinguish simultaneous two signals in one channel. And it is an efficient approach of receiver for reconnaissance which can adapt to the insensitive signals environment of modem EW for its low computing complexity and high hardware realizing efficiency.