●●● ●●●● 1.Signal-Sideband Modulation ●●●●● ●●●● DSB SSB ●0 m() vi(t) v(") v.(r) SoN。 Sideband F Baseband filter no/2 filter filter (AGWN) SSB modulator Channel receiver SSB demodulator m(t):bandlimited modulating waveform限制调制波形 f:the maximum frequency最高频率ofm() m(t)=cos2πfmt0≤fm≤fM n/2:two-sided power spectral density of Gaussian white noise. Contributed by the transmitter channel and noise generated by the input stages of the receiver.高斯白噪声的双边带功率谱密度， 它由发射通道和接收机输入级的噪声产生。 131. Signal-Sideband Modulation m(t): bandlimited modulating waveform限制调制波形 fM: the maximum frequency 最高频率of m(t) ( ) cos 2 0 m t m mM    f t f f n 0/2: two-sided power spectral density of Gaussian white noise. Contributed by the transmitter channel and noise generated by the input stages of the receiver.高斯白噪声的双边带功率谱密度， 它由发射通道和接收机输入级的噪声产生。 13