Methods and apparatus for computing soft data or log likelihood ratios for received values in communication or storage systems

摘要

Methods and apparatus are provided for computing soft data or log likelihood ratios for received values in communication or storage systems. Soft data values or log likelihood ratios are computed for received values in a communication system or a memory device by obtaining at least one received value; identifying a segment of a function corresponding to the received value, wherein the function is defined over a plurality of segments, wherein each of the segments has an associated set of parameters; and calculating the soft data value or log likelihood ratio using the set of parameters associated with the identified segment. The computed soft data values or log likelihood ratios are optionally provided to a decoder.

主权项

1. A method for computing one or more of a soft data value and a log likelihood ratio for a received value in one or more of a communication system and a memory device, comprising:
obtaining at least one received value; identifying a segment of a function corresponding to said received value, wherein said function is defined over a plurality of segments, wherein each of said segments has an associated segment-dependent variance; and calculating said one or more of said soft data value and said log likelihood ratio using said segment-dependent variance associated with said identified segment, wherein one or more steps of said method are performed by at least one hardware device.