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In a baseband communications link, frequencies upto 3500 Hz are used for signaling.
Using a raised cosine pulse with 75% excess bandwidth and for no inter-symbol
interference, the maximum possible signaling rate in symbols per second is
  • a)
    1750
  • b)
    2625
  • c)
    4000
  • d)
    5250
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
In a baseband communications link, frequencies upto 3500 Hz are used f...
For raised cosine spectrum transmission bandwidth is given as
BT = W(1 + α)              α → Roll of factor
BT = Rb/2 (1+α )        Rb → Maximum signaling rate
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Most Upvoted Answer
In a baseband communications link, frequencies upto 3500 Hz are used f...
Baseband Communications Link:
In a baseband communications link, frequencies up to 3500 Hz are used for signaling.

Raised Cosine Pulse:
A raised cosine pulse is used with 75% excess bandwidth to avoid inter-symbol interference.

Maximum Signaling Rate:
The maximum possible signaling rate in symbols per second can be calculated as follows:

- The bandwidth of the raised cosine pulse is 1.75 times the maximum signaling frequency (3500 Hz) = 6125 Hz.
- The Nyquist rate is twice the bandwidth, i.e., 2 x 6125 Hz = 12250 Hz.
- The maximum signaling rate is half of the Nyquist rate, i.e., 12250/2 = 4000 symbols per second.

Therefore, the correct answer is option 'C'.
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