1. A method of calculating bit log-likelihood ratio (LLR) values, comprising: receiving a signal in a frequency band after transmission over a media, said signal including at least one complex data symbol having a plurality of information bits, wherein said complex data symbol is transmitted on at least one frequency channel; calculating initial LLR values for each of said plurality of information bits based on a bit-to-symbol mapping of modulation and noise variance information from said complex data symbol; calculating an average signal to noise ratio (SNR) of said frequency channel, and normalizing each of said initial LLR values by dividing by said average SNR to generate a plurality of normalized LLR values.