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    Question

    If signal-to-interference ratio is 5 dB, signal power is

    8 dB, then what is the interference power in dB?
    A 13 dB Correct Answer Incorrect Answer
    B 3 dB Correct Answer Incorrect Answer
    C 5 dB Correct Answer Incorrect Answer
    D 8 dB Correct Answer Incorrect Answer

    Solution

    Signal-to-Interference Ratio (SIR in dB) = Signal power (dB) – Interference power (dB) Given, SIR = 5 dB Signal power = 8 dB So, Interference power = Signal power – SIR = 8 – 5 = 3 dB

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