基于DDS的多种调制方式频率源的设计

Design of Frequency Source with Multiple Modulation Methods Based on DDS

阐述由于DDS具有频率分辨率高、相位连续、相位噪声低、控制灵活的特点,在现代雷达技术中得到了广泛的应用。提出一种多种调制方式输出的频率源方案,给出了DDS输出多种调制方式波形的详细设计。设计方案中DDS采用ADI公司的AD9914芯片,结合Intel公司的CYCLONE系列FPGA,不仅可以实现频率源的快速跳频,还可以实现多种调制方式的灵活切换。

Because DDS has the characteristics of high frequency resolution,low phase noise and flexible control,it has been widely used in modern radar technology.This paper introduces a frequency source scheme for output of multiple modulation methods,and gives a detailed design of the waveforms of multiple modulation modes output by DDS.In the design scheme,DDS adopts AD9914 of ADI Company,combined with CYCLONE series FPGA of Intel Company,not only can realize fast frequency hopping of frequency source,but also realize flexible switching of multiple modulation methods.