A binary channel with a bit rate Rb = 36000 bits per second (b/s) is available f

Question

A binary channel with a bit rate Rb = 36000 bits per second (b/s) is available for PCM voice
transmission. Find the appropriate values of the sampling rate fs, the quantizing level L, and
the binary digits n, assuming fM = 3.2 kHz. Hints: f_s=2×f_M and (n×f_s )=R_b and L = 2n
b)A data-communication system operates at 28.8 kb/s (typical of current high-speed telephone modems). How long [in micro-seconds (µs)] does the receiving UART have to transfer an incoming character to a buffer or to the main computer before the next character arrives?

Explanation / Answer

fs>=fm=6400     and nfs<=r=36000

therefore r<=r/fs=5.6

hence n=5

L=2n=25=32

and fs=36000/5=7.2 Khz

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