针对传统的最小频移键控(MSK)的调制解调方式，提出一种基于甚高速硬件描述语言(VHDL)的数字式MSK调制解调模型。
For the conventional modulation and demodulation of Minimum Frequency Shift Keying (MSK), the new models for modu - lation and demodulation on digital MSK based on VHDL are developed.
介绍了简易v . 23二进制频移键控(2fsk)调制解调器的工作原理、算法分析以及基于可编程器件DSP的软件设计方法。
The working principle, algorithm analysis and software design method of a simplified V. 23 2fsk modem based on DSP which is a kind of programmable chip are introduced in this article.
该方案利用频移键控频分复用（FSK FDM）技术进行声频副载波调制，通过光强度调制实现远程在线EDFA监控信息随主信号的传输。
In the scheme, FSK-FDM technique is used in subcarrier modulation, and the EDFA's supervisory information is transmitted by optical intensity modulation.
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