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Question 20295
JEE Physics · Hard

Principles of Communication: Digital Communication MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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Digital CommunicationHardQuestion 20295

Question

In QAM-64 modulation, each symbol carries how many bits?
  1. A
    4
  2. B
    6
    Correct
  3. C
    8
  4. D
    16

Correct answer

6

Explanation

QAM-M carries log₂(M) bits per symbol. QAM-64 (64 = 2⁶): 6 bits/symbol. 4G LTE uses QAM-64/256 to achieve high spectral efficiency. QAM-256 carries 8 bits/symbol but requires better SNR.

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