Question

Problem 3 Assume that a 3 KHz channel is to transmit some given binary data. What data rate will this channel support in bits/second for the following line codes: a. Binary polar signaling with full width rectangular pulses (NRZS). b. Binary polar signaling with raised cosine pulses with a=0.25. Here, use the exact/absolute raised cosine BW. c. 4-ary signaling with raised cosine pulses with a =0.25. Here too, use the exact/absolute raised cosine BW.

Answer 1

Givens, Bandwidth of channel = 3 kHz a Bit Rate, R6=3kbps a) NRZ. . .. . Data Rate = Pb=3Kbps .... =3000 bits/second b) .2=0.25 WRZ Data Rate = Rb Ata) = 3 (1+0.25) = 1.875 kbps c) 4-Array . = 1895 bits/sec. L = 0.25 (m=4) Data Pate = (Rb) (+) = 3k 170.25) = 3k (1,25) = 0.9375 kbps = 937.5 bits/see