Signal-to-Noise Ratio
A Signal-to-Noise Ratio is a ratio measure based on the level of a desired signal to the level of background noise.
- See: Spamming, Signal (Electrical Engineering), Noise (Signal Processing), Biochemical Signaling, Bandwidth (Signal Processing), Channel Capacity, Channel (Communications), Shannon–Hartley Theorem.
References
2017
- (Wikipedia, 2017) ⇒ https://en.wikipedia.org/wiki/Signal-to-noise_ratio Retrieved:2017-11-12.
- Signal-to-noise ratio (abbreviated SNR or S/N) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise.
S/N ratio is defined as the ratio of signal power to the noise power, often expressed in decibels. A ratio higher than 1:1 (greater than 0 dB) indicates more signal than noise.
While SNR is commonly quoted for electrical signals, it can be applied to any form of signal (such as isotope levels in an ice core or biochemical signaling between cells).
The signal-to-noise ratio, the bandwidth, and the channel capacity of a communication channel are connected by the Shannon–Hartley theorem.
Signal-to-noise ratio is sometimes used metaphorically to refer to the ratio of useful information to false or irrelevant data in a conversation or exchange. For example, in online discussion forums and other online communities, off-topic posts and spam are regarded as "noise" that interferes with the "signal" of appropriate discussion.
- Signal-to-noise ratio (abbreviated SNR or S/N) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise.