Question
Ignoring quantization noise and considering only channel
noise in pulse coded modulation system, if signal-to-noise ratio is 10 dB, noise power is 2 dB, then what is the signal power in dB?ÂSolution
In a communication system, the relation between signal power, noise power, and signal-to-noise ratio (SNR) is SNR (dB) = Signal power (dB) – Noise power (dB) Here, SNR = 10 dB Noise power = 2 dB So, Signal power = SNR + Noise power = 10 + 2 = 12 dB
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