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.
出处
《仪表技术与传感器》
CSCD
北大核心
2008年第6期76-78,共3页
Instrument Technique and Sensor
