Shannon-ova teorema... :)

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Considering all possible multi-level and multi-phase encoding techniques, the Shannon–Hartley theorem states that the channel capacity C, meaning the theoretical tightest upper bound on the rate of clean (or arbitrarily low bit error rate) data that can be sent with a given average signal power S through an analog communication channel subject to additive white Gaussian noise of power N, is:

C = B log2(1+S/N)

where

C is the channel capacity in bits per second;
B is the bandwidth of the channel in hertz;
S is the total signal power over the bandwidth, measured in watt or volt2;
N is the total noise power over the bandwidth, measured in watt or volt2; and
S/N is the signal-to-noise ratio (SNR) or the carrier-to-noise ratio (CNR) of the communication signal to the Gaussian noise interference expressed as a straight power ratio (not as decibels).
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http://en.wikipedia.org/wiki/Shannon%E2%80%93Hartley_theorem

Pozdrav,
Milenko.

Hvala !

Pozdrav