Viterbi decoder's error correction/noise tolerance capability

Started by Ben June 22, 2006

Can someone explain to me the meaning of the statement "The noise
tolerance of a Viterbi decoder is x dB"?

Is noise tolerance the same as BER (as measured in the form 10^(-y))?
How are these 2 quants related?

I am using a soft demapper that takes in 16 bit input to generate 4
single-byte "soft" inputs per iteration, which are then passed pair
wise through a soft input/hard output Viterbi decoder, to generate 1
"hard" bit per pass.

Any help is appreciated