1. A communication channel, comprising: a digital filter configured for filtering an input signal; a first quantizer configured for quantizing the filtered signal to produce a first quantized sample having a first precision; a second quantizer configured for quantizing the filtered signal to produce a second quantized sample having a second precision, wherein the second precision is different from the first precision; and an iterative decoder configured for utilizing the first quantized sample for a first global iteration of a decoding process and utilizing the second quantized sample for at least one subsequent global iteration of the decoding process.