Patent ID: 6360345
Filing Date: 2002-03-19
Classification: H03M

Abstract:
In a method of decoding turbo codes at a decoding block including nâˆ’1 constituent decoders, nâˆ’2 or more interleavers, and nâˆ’2 or more deinterleavers, said decoding block having a code rate 1/n, a decoding method of turbo codes using a weighted parallel type comprising:a first decoding process of sequentially decoding starting from a first constituent decoder among said nâˆ’1 constituent decoders to generate a first log-likelihood ratio after completing the decoding; a second decoding process of sequentially decoding starting from a second constituent decoder to generate a second log-likelihood ratio after completing the decoding, said second decoding being activated in parallel with said first decoding; a (nâˆ’1)th decoding process of, after said decodings are continually performed in parallel, sequentially decoding starting from a (nâˆ’1)th constituent decoder to generate a (nâˆ’1)th log-likelihood ratio after completing another decoding different from said decodings, said (nâˆ’1)th decoding being activated in parallel with said decodings; a step of optimally weighting respective components forming each log-likelihood ratio generated by each constituent decoder; and a step of combining the weighted log-likelihood ratios simultaneously generated at respective decoding processes to obtain diversity gain.