Buffer management in a turbo equalization system

摘要

A plurality of partially-decoded codewords that have been processed at least once by a first and a second error correction decoder is stored. A plurality of metrics associated with how close a corresponding partially-decoded codeword is to being successfully decoded is stored. From the plurality of partially-decoded codewords, a codeword having a metric indicating that that codeword is the closest to being successfully decoded by the first error correction decoder and the second error correction decoder is selected. The selected codeword is output to the first error correction decoder.

主权项

1. A system for managing a buffer, comprising:
a first soft output decoder which is configured to perform error correction decoding using a first type of error correction code; a second soft output decoder which is configured to perform error correction decoding using a second type of error correction code on the output of the first soft output decoder, wherein the second soft output decoder generates (1) a plurality of partially-decoded codewords that have been error corrected at least once by the first soft output decoder and the second soft output decoder and (2) a plurality of metrics associated with how close a corresponding partially-decoded codeword is to being successfully decoded; a second decoder output buffer which:
stores the plurality of partially-decoded codewords that have been error corrected at least once by the first soft output decoder and the second soft output decoder; andstores the plurality of metrics associated with how close a corresponding partially-decoded codeword is to being successfully decoded; and a buffer manager which:
selects, from the plurality of partially-decoded codewords, a codeword having a metric indicating that the codeword is the closest to being successfully decoded by the first output decoder and the second soft output decoder; andoutputs the selected codeword to the first soft output decoder for another iteration of error correction using the first type of error correction code.