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Signal to interference plus noise ratio is defined as ____

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Signal to interference plus noise ratio is defined as ____

(a) ratio of noise power to interference power

(b) ratio of signal power to sum of noise and interference power

(c) ratio of sum of noise and interference power to signal power

(d) ratio of interference to noise power

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Asked question is from Techniques topic in section Cognitive Techniques of Cognitive Radio

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Right option is (b) ratio of signal power to sum of noise and interference power

The best explanation: Signal to interference plus noise ratio is defined as ratio of signal power to sum of noise and interference power. If the noise power were to be zero, the expression reduces to signal to interference ratio. If the interference were to be zero, the expression reduces to signal to noise ratio.

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