基于FPGA/DDS技术的MSK信号调制与解调  

Modulation and demodulation of MSK signals based on FPGA/DDS Technology

作　　者：贾志强[1] 郭莉[1] 陈文志[1] 

机构地区：[1]北京邮电大学信息与通信工程学院信号与信息处理实验室,北京100876

出　　处：《微计算机信息》2009年第29期156-158,共3页Control & Automation

摘　　要：本文实现了一种采用直接数字合成DDS(Direct Digital Synthesis)技术和延时相干解调技术的MSK(Minimum Shift Key-ing)信号的调制与解调方法,与传统采用直接提取载波进行相干解调的方法相比较,避免了载波提取困难的问题。本文给出了基于现场可编程门阵列FPGA(Field Programmable Gate Array)和DDS技术的MSK信号调制与解调的详细的软硬件设计框图,并采用FPGA以及专用DDS芯片AD9851实现了整个调制与解调系统。实验结果表明本设计配置灵活、实现简洁,具有很好的实用价值。This paper implemented the method which was based on DDS （Direct Digital Synthesis） technology and delayed coherent demodulation technology to modulate and demodulate MSK （Minimum Shift Keying） signals. Compared with traditional carrier extracting method, this method avoided the problems carried out by the carrier extracting method. This design built a system model, and gave detailed hardware and software implementation of the modulation and demodulation of MSK signals. The system used FPGA as well as special-purpose DDS chip AD9851 to realize the modulation and the demodulation system. The test results indicated that this design is easy to configure and realize, has practical use value.

关 键 词：MSK调制与解调 DDS原理 FPGA 

分 类 号：TN76[电子电信—电路与系统]