解:1.B=2f=2×5=10KHz中心频率100KHz H() K95KH≤f105KHz 0 其它 2.S=10KW N=2BP(f)=2×10×103×0.5×103=10W =100O 3.S 2 =200017 解: 1. B=2fm=2×5=10KHz 中心频率100KHz 2. Si =10KW 3. = 0 其它 95 105 ( ) K KHz f KHz H Ni 2BP n ( f ) 2 10 10 0.5 10 10W 3 3 = = = − =1000 i i N S 2 2000 0 0 = = i i N S N S