Patent ID: 9124297
Filing Date: 2015-09-01
Classification: H03M

Abstract:
1. A method of generating trapping-set information for use in decoding encoded codewords, the method comprising: (A) selecting a first trapping set from a trapping-set database; (B) selecting a first codeword; (C) using a noise injector circuit to generate a first set of log-likelihood-ratio values by injecting noise into a set of bit positions of the first codeword, wherein the set of bit positions corresponds to the first trapping set; (D) generating a first output word by subjecting the first set of log-likelihood-ratio values to decoding processing; and (E) when the first output word is not a valid codeword, comparing the first output word and the first codeword to detect a second trapping set different from the first trapping set.