Electronics and Communication Engineering - Communication Systems - Discussion
Discussion Forum : Communication Systems - Section 5 (Q.No. 33)
33.
24 telephone channels, each band limited to 3.4 kHz, are to be time division multiplexed by using PCM, calculate the bandwidth of PCM system for 128 quantization levels and an 8 KHz sampling frequency
Answer: Option
Explanation:
Given, n = 24, fm = 3.4 kHz
M = 128,
2N = 128 
n = 7
But fs = 2fm, here we will consider fs (sampling) frequency
instead at 2fm 2 x 3.4 kHz 6.8 KHz.
B.W. = [24(7 + 1)] 8 kHz = 1.54 MHz.
Discussion:
3 comments Page 1 of 1.
Ayaz said:
7 years ago
In pcm, BW is nFs/2.
Taguig said:
7 years ago
For the sign which is not considered in 2^N-1 formula.
(1)
Baba said:
8 years ago
Why one extra bit is taken in accounting B.W of the pcm?
(1)
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers