Chapter 8 Communication Systems 58.4 Single-Sideband Sinusoidal Amplitude Modulation (单边带) Xlo x coso t 0 M Yo Upper Lower Del sideband sideband sideband 0 20 2 M M Double sideband Modulation ( DsB9 Chapter 8 Communication Systems §8.4 Single-Sideband Sinusoidal Amplitude Modulation （单边带） − M 0  X(j)  M t c cos x(t) y(t) −c 0  Y(j) c 2 M 2 M Upper sideband Upper sideband Lower sideband Double Sideband Modulation (DSB)