基于软件无线电的零中频数字接收机研究

本文介绍了一种基于多相滤波正交化处理的零中频数字接收机的设计方案。这种接收机采用软件无线电的体系结构,即在一个通用的硬件平台上,通过安装软件来实现接收调幅信号(AM)的通信功能。来自天线的信号经过射频(RF)处理和变换,由宽带A/D数字化,然后通过可编程逻辑门阵FPGA模块实现所需的信号处理,而后将处理后的数据经D/A转换后送至用户终端。

Design of Zero-Intermediate Frequency Digital Receiver Based on FPGA

In this paper,a design scheme of zero-intermediate frequency digital receiver is introduced,which is based in in_quadrature multiphase filtering. This receiver adopts the system and composition of the software radio. It means that the receiver builds a current hardware platform,and by using software to achieve communication function to receive amplitude modulation(AM) signals. When signals get to the antenna,RF deals with them and then broadband A/D switches them to digital data. After that,FPGA(Field Programmable Gate Array) modules realize all the necessary signals processing. Then,the disposed data are converted by D/A and send to the user terminals.