一种高效的宽带数字接收机及其FPGA实现  

Wideband digital receiver based on polyphase filters and its FPGA realization

作　　者：罗勇江[1] 汤建龙[1] 赵国庆[1] 斯海飞[1] 

机构地区：[1]西安电子科技大学电子工程学院,陕西西安710071

出　　处：《系统工程与电子技术》2010年第5期916-920,共5页Systems Engineering and Electronics

摘　　要：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。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 receiver show the new receiver can achieve more channel than the normal receiver under the condition of the same FPGA resource.

关 键 词：信道化 宽带数字接收机 多相滤波 

分 类 号：TN958.97[电子电信—信号与信息处理]