Twelve different message signals, each with a bandwidth of 10 kHz, are to be multiplexed a
A、DSB与SSB解调增益都是1
B、DSB解调增益都是1,而SSB解调增益都是2
C、DSB解调增益都是2,而SSB解调增益都是1
D、SSB解调增益也是1,但是因为SSB节约了传输带宽,所以SSB解调性能比DSB要好。
A linear delta modulator is designed to operate on speech signals limited to 3.4 kHz. The specifications of the modulator are as follows: Sampling rate = 10whereis the Nyquistrate of the speech signal. Step size=100 mv The modulator is tested with a 1-kHz sinusoidal signal. Determine the maximum amplitude of this test signal required to avoid slope overload
A、FM>DSB>VSB>SSB
B、宽带FM>DSB=AM>VSB>SSB
C、宽带FM>窄带FM>DSB>VSB>SSB
D、宽带FM>窄带FM=AM>VSB>SSB
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