一种高效的宽带数字接收机及其FPGA实现

针对电子战中的宽带侦察数字信道化接收机，提出了基于短时傅里叶变换的宽带数字信道化接收机的改进方法，给出了该方法的FPGA实现。该方法采用多相滤波结构，通过先对时域抽取信号进行傅里叶变换，再对变换结果进行加权处理，从而实现宽带信号信道化。理论分析和原理样机系统验证表明，在相同的FPGA资源和时间分辨要求条件下，该方法相对传统短时傅里叶变换的信道化接收机可实现更多的信道数。

Wideband digital receiver based on polyphase filters and its FPGA realization

Digital technique for wideband channelized receivers for electronic war(EW) is studied,a new method using polyphase filters is employed to optimize normal channelized receivers based on the short time Fourier transform(STFT).The first step of this method is decimating time-domain data,then applies fast Fourier transform(FFT) to the decimated data and weights the transformed results.The realized process of the method on FPGA is discussed.The theoretical analysis and the experiment using real application rece...