Capacity

Are there any techniques that can achieve higher transmission rate than Shannon capacity?

Are there any techniques that can achieve higher transmission rate than Shannon capacity?
  1. What is the maximum channel capacity given by Shannon's limit?
  2. How is Shannon capacity related to SNR?
  3. What does Shannon capacity have to do with communication?
  4. How do you find the Shannon limit for information capacity?

What is the maximum channel capacity given by Shannon's limit?

Considering the Shannon limit around 6bit/s/Hz (or 0.75Tbit/s/nm) and the maximum 80nm bandwidth (achievable by C+L or Raman amplification) of a system, the achievable capacity over a transatlantic submarine cable will be around 60Tbit/s per fiber pair, that is not exceeding three times the state of the art technology ...

How is Shannon capacity related to SNR?

The Shannon capacity theorem defines the maximum amount of information, or data capacity, which can be sent over any channel or medium (wireless, coax, twister pair, fiber etc.). What this says is that higher the signal-to-noise (SNR) ratio and more the channel bandwidth, the higher the possible data rate.

What does Shannon capacity have to do with communication?

The Shannon limit or Shannon capacity of a communication channel refers to the maximum rate of error-free data that can theoretically be transferred over the channel if the link is subject to random data transmission errors, for a particular noise level.

How do you find the Shannon limit for information capacity?

If the requirement is to transmit at 5 mbit/s, and a bandwidth of 1 MHz is used, then the minimum S/N required is given by 5000 = 1000 log2(1+S/N) so C/B = 5 then S/N = 25 −1 = 31, corresponding to an SNR of 14.91 dB (10 x log10(31)).

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