# Compare the maximum data rate of a noiseless 4-kHz...

Compare the maximum data rate of a noiseless 4-kHz channelusing

(a) Analog encoding (e.g.,QPSK)with 2 bits per sample.

(b) The T1 PCM system.

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Compare the maximum data rate of a noiseless 4-kHz channelusing

(a) Analog encoding (e.g.,QPSK)with 2 bits per sample.

(b) The T1 PCM system.

## Answers ( 1 )

Maximumsampling rate = 2 x 30 = 60 Kbps.

4 level PCMwill need 2 bits/sample.

Maximum datarate= 60 x 2 =120 KbpsMaximumsampling rate = 2 x 30 = 60 Kbps.

6 level PCMwill need 3 bits/sample.

Maximum datarate= 60 x 3 =180 Kbps