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Shannon's law |
Also found in: Wikipedia | 0.10 sec. |
Shannon's lawA formula in Claude Shannon's information theory for determining the maximum, error-free rate of a digital communications channel. It is based on the channel's bandwidth and signal-to-noise ratio. See information theory and laws.
Shannon's Law
C = maximum data rate of channel
W = bandwidth of channel
S = signal-to-noise ratio
C = W log2(1 + S)
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By the early 1990s, state-of-the-art codes were typically getting information across at only about half the rate that Shannon's law said was possible. |
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