可变带宽数字下变频的设计与FPGA实现

Design and implementation of digital down conversion with variable bandwidth based on FPGA

分析了数字下变频的结构和原理,提出了一种适用于多种带宽信号的数字下变频方案,并对其中的混频模块和抽取滤波模块进行了详细设计和介绍,最后结合Matlab和FPGA开发平台,分别对不同带宽信号的下变频功能进行了仿真和验证,结果表明方案是可行的。

A design of DDC with variable bandwidth is proposed after researching the structure of traditional DDC, the mixer and decimation filters are mainly analyzed. Finally, a simulation of different signals based on Matlab and FPGA is given, the results in-dicate that this DDC architecture is correct and feasible.