Shannon capacity limit & FEC comparisons

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.

1. What is Shannon capacity formula?
2. What is the Shannon limit for optical fiber?
3. What is capacity of a channel?

What is Shannon capacity formula?

Shannon's formula C = 12log(1+P/N) is the emblematic expression for the information capacity of a communication channel.

What is the Shannon limit for optical fiber?

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 ...

What is capacity of a channel?

The channel capacity, C, is defined to be the maximum rate at which information can be transmitted through a channel. The fundamental theorem of information theory says that at any rate below channel capacity, an error control code can be designed whose probability of error is arbitrarily small.