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Discussion :: Communication Systems

  1. The equation v(t) = A cos [ωct + φ(t)] where A and ωc are constant and φ(t) is a function of base signal represents

    1. Phase modulation
    2. Amplitude modulation
    3. Angle modulation
    4. Frequency modulation
    Which of the above are true?

    2. A.
    3 only
    B.
    1, 3 and 4
    C.
    1, 2, 3, 4
    D.
    3 and 4 only

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    Answer : Option B

    Explanation :

    This equation can represent frequency, angle and phase modulation.

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