基于DDS和FPGA的多制式数字调制源的设计

摘要

With the development of DSP （ digital signal process） and IC （ integrated circuit） technology, DDS （Direct Digital Synthesizer）is applied more and more widely. This paper mainly introduces a method that can directly realize the multi-system digital modulation in the 70 MHz. through the digital combination of AD＇ s high-performance DDS chip-AD9852 and FPGA （Field programmable Gate Array）. The long-distance trans- portation of signals will come true through FPGA programming which can control the diverse modulation signals produced by DDS AD9852.%介绍了DDS芯片AD9852和FPGA（现场可编程门阵列）相结合的全数字方法，直接在70MHz中频上实现多制式信号调制。通过FPGA编程实现对DDS所产生的多种不同调制信号的控制，从而实现远距传输信息的目的。