●●● ●●●● 1.Signal-Sideband Modulation ●●●●● ●●●0 ●●●●● f(切 cosunt ●●●0 ●●●● MAAAAA ● PAv(1)=[A+f(t)]cos@t Ao+f(t) Modulation index: A0 调制指数 0 Am 中4w(o)=πA[δ(0+0）牛8(0-0)] 阝AM A ↓Fla +与F(oyF(0-o〗 USB LSB LSB USB 121. Signal-Sideband Modulation 0 0 ( ) [ ( )]cos AM  t A ft t    00 0 ( ) [ ( ) ( )] 1 [ ( ) ( )] 2 AM c c A F F                  USB LSB LSB USB Modulation index: 调制指数 0 m AM A A   12