Systems and methods for detection and correction of error floor events in iterative systems

摘要

Methods and apparatuses are provided for decoding a codeword using an iterative decoder. The iterative decoder, in a first decoding mode, performs a number of channel iterations on the codeword, determines a first syndrome weight after a first time period, and determines a second syndrome weight after a second time period. Each channel iteration includes an iteration of the channel detector and at least one iteration of the inner iterative decoder. The iterative decoder, in a second decoding mode, determines a true syndrome of the codeword, and processes the codeword based on the true syndrome of the codeword. The codeword is processed using the second decoding mode in response to determining that the first and second determined syndrome weights are less than a syndrome weight threshold.

主权项

1. A method for decoding a codeword using an iterative decoder, wherein the iterative decoder comprises a channel detector and an inner iterative decoder, the method comprising:
in a first decoding mode:
performing a number of channel iterations on the codeword using the iterative decoder, wherein each channel iteration comprises an iteration of the channel detector and at least one iteration of the inner iterative decoder,determining a first syndrome weight after a first time period in the first decoding mode; anddetermining a second syndrome weight after a second time period in the first decoding mode; in a second decoding mode:
determining a true syndrome of the codeword; andprocessing the codeword based on the true syndrome of the codeword; and wherein the codeword is processed using the second decoding mode in response to determining that the first and second determined syndrome weights are less than a syndrome weight threshold.