基于DSP与DDS的数字正交调制器  

Digital Quadrate Modulation Based on DSP and DSS

作　　者：潘柏英[1] 潘望[2] 

机构地区：[1]湖州师范学院理学院,浙江湖州313000 [2]湖州电力局,浙江湖州313000

出　　处：《仪表技术与传感器》2008年第6期76-78,共3页Instrument Technique and Sensor

摘　　要：基于DDS的数字正交调制方案以AD9857为核心实现。阐述了基于DDS的数字正交调制器硬件电路的实现原理与方法,开发了基于DDS的8通道并行数字正交调制系统。实现了PC机与8通道数字正交调制器的高速数据交换,开发了基于EZ-USB FX2的USB2.0数据传输系统,降低了PC机与数字信号处理系统间的电磁干扰,提高了信号处理系统内部数据传输速度及硬件系统的可靠性。AD9857 is the core of the digital quadrate modulator based on DDS. The hardware achieving principle and the method of the digital quadrate modulator was presented, and the eight-channel parallel digital quadrate modulation system based on DDS was developed. In order to realize hlgh-speed data exchange between PC and the eight-channel digital quadrate modulators, the USB2. 0 data transfer system based on EZ-USB FX2 was developed, which reduced the electromagnetic interference between PC and digital signal processing system, improved the reliability of the hardware system and the speed of data transfer in the signal processing system.

关 键 词：数字信号处理器 直接数字频率合成器 数字正交调制 

分 类 号：TN761[电子电信—电路与系统]