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Discussion :: Communication Systems

  1. A source generates three symbols with probabilities 0.25, 0.25, 0.50 at a rate of 3000 symbols per second. Assuming independent generation of symbols, the most efficient source encoder would have average bit rate is as

    2. A.
    6000 bits/sec
    B.
    4500 bits/sec
    C.
    3000 bits/sec
    D.
    1500 bits/sec

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    Workspace

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    Answer : Option B

    Explanation :

    Use Shannon Fano coding.

    (0.25) is encoded as 01

    Number of bits/sec

    = 0.25 x 3000 x 2 + 0.25 x 3000 x 2 + 0.5 x 3000

    45000 bits/sec.

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