摘要
阐述了DDS(直接频率合成)的基本理论,并对其理论实现做了详尽的理论分析。在此基础上介绍了采用DDS进行MSK(最小频移键控)数字调制的一般方法,还讨论了差分解调的一般理论,推导出了相关理论结果。最后介绍了采用美国Altera公司推出的快速FPGA开发环境DSPBuilder系统设计工具进行数字系统设计的一般方法,并采用此方法在FPGA芯片上实现了MSK数字调制解调系统。
In this paper, the basic principles of direct digital synthesis technology is first introduced, then a new method of minimum shift keying modulation which is based on DDS and differential demodulation is introduced. Also the equations are given. At last, the general method of how to use the altera DSP builder system design tool to design a digital system, and realize the MSK modem system on a FPGA chip is introduced.
出处
《无线电工程》
2006年第4期24-26,共3页
Radio Engineering
