模拟信号调制技术(FM/AM/PM/SSB)
来自Jack's Lab
目录 |
1 概述
http://www.rfcafe.com/references/electrical/NEETS-Modules/NEETS-Module-12-2-1-2-10.htm
2 FM
- 信号:xm(t) = β·sin (Ωmt)
- 载波:xc(t) = Xc·cos (Ωct)
FM 调制后的波形为:x(t) = Xc·cos [Ωct + β·sin (Ωmt)]
http://www.rfcafe.com/references/electrical/frequency-modulation.htm
3 AM
http://www.rfcafe.com/references/electrical/amplitude-modulation.htm
4 QAM
http://en.wikipedia.org/wiki/Quadrature_amplitude_modulation
5 PM
6 SSB