GATE EC 2022: Communication System Quiz 8

In a PCM as number of bits per sample increased from 8 to 10 then channel bandwidth required will be increased by _____%

The message signal to a delta modulator is If step size is 0.1V, then sampling frequency required to avoid slope overload distraction is ________ KHz.

An anlog signal of bandwidth 20kHz is sampled at a rate of 40kHz and qunatized into 16 levels .the resultant digital signal is transmitted using M-ary PSK with raised cosine pulse (roll off factor 0.3) if the channel with 110kHz bandwidth is available to tansmit the data ,then smallest acceptable value of M is____

In a binary PCM system, the output signal to noise ratio is maintained at minimum of 40 dB. Then find number of levels required  and the corresponding SNR.

Modulating signal is given to PCM system having step size of 0.75V. Bit interval of the resultant signal is ______ m sec.

consider an audio signal with spectral components limited to frequency band 300 to 3300 Hz . A PCM signal is generated with smapling rate ogf 8000 sampes/seC. The required output SNR is 30dB. then minimum bandwidth needed _______kHz .(when an

μ-law compander is used with μ = 255)