![]() ![]() This is more typically used in the Log format Noise Figure in NF dB which can be computed from the formula. If the variance of the signal and noise are known, and the signal is zero: S N R = σ s i g n a l 2 σ n o i s e 2. In Digital sense, this ratio refers useful information, false information, spam or the things that are off The signal to noise ratio (SNR) is equal to the ratio of the average signal intensity over the standard deviation of the noise. In fact, it’s not actually a ratio at all. In optical measurements, the signal-to-noise ratio may be increased with various types of measures: A first possibility is to remove any avoidable noise sources. Usually if the signal power is less than or just equals the noise power it is not detectable. Dilip, he has mentioned the signal to be y that appears in the numerator of SNR formula. Note that this is only one specific definition of the signal to noise ratio. A ratio higher than 1:1 (greater than 0 dB) indicates more signal than noise. ![]()
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