Patent ID: 7895506
Filing Date: 2011-02-22
Classification: H04L

Abstract:
1. An iterative decoder and early-exit condition detector comprising: a first codeword generator to generate a first codeword from decoded bits generated from a first sub-decoder after one or more half-iterations of the iterative decoder; a second codeword generator to generate a second codeword from decoded bits generated from a second sub-decoder after an additional half-iteration of the iterative decoder; and circuitry to buffer and compare the first and second codewords to determine whether the decoded bits generated from the second sub-decoder are valid; and a controller to set a codeword matching level to configure the iterative decoder to perform one of double or triple codeword matching based on an estimated signal-to-noise ratio (SNR), wherein when the first and second codewords match and when the codeword matching level is set to double codeword matching: wherein when the codeword matching level is set to triple codeword matching: