GATE EC 2016 Set 1 — Question 31
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Communications → Source Coding & Baseband Transmission → Raised Cosine Pulse Shaping
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Question
Consider binary data transmission at a rate of 56 kbps using baseband binary pulse amplitude modulation (PAM) that is designed to have a raised-cosine spectrum. The transmission bandwidth (in kHz) required for a roll-off factor of 0.25 is ________
Correct answer
34.5 to 35.5
Solution
Given:
- Bit rate () = 56 kbps
- Modulation: Baseband binary PAM. For binary transmission, each symbol represents one bit (, ), so the symbol rate () is equal to the bit rate ().
- ksymbols/s
- Roll-off factor () = 0.25
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