***** Source *****
Simon Haykin,Communication Systems,4e,Wiley,2001
Section 6.11 Voiceband Modems
***** Ideas *****
1. Principles: PSTN networks,block diagram, modulation schemes
***** Problems ******
2. Need ISP's support, so not suitable for hidden communication such as speech watermark
https://blog.sciencenet.cn/blog-702159-552501.html
下一篇:
Comparison of Yule-Walker and Wiener-Hopf