摘要
软件DDS(Direct Digital Synthesizer)是根据DDS原理,分时利用单片机及数模转换器,模拟DDS芯片进行频率合成。该系统利用DSP进行SDDS频率合成,并以此为基础进行FSK调制。文中在介绍SDDS原理的同时,对比了其与DDS芯片的优缺点;在介绍单通道FSK调制的基础上,进行了多通道FSK调制。
The Software DDS （SDDS） is on the basis of the theory of DDS and it works as the chip of DDS with a SCM and DAC in the method of time-division. The system adopts DSP to synthesize frequency and accordingly applies this SDDS to the FSK modulation. On the one hand, this paper introduces the theory of SDDS as well as contrasting to the advantages and disadvantages of chip of DDS; on the other hand, it develops muhichannel FSK based on the single channel FSK.
出处
《无线通信技术》
2009年第1期59-62,共4页
Wireless Communication Technology
