Patent ID: 6477679
Filing Date: 2002-11-05
Classification: H03M

Abstract:
A method for decoding a sequence of inputs, wherein the sequence includes a system input and a first parity input, comprising:providing to said first constituent decoder a feedback input received from a second constituent decoder and the first parity input; the first constituent decoder producing a first constituent decoder output based on the feedback input and the first parity input; modifying the output of the first constituent decoder to include a statistical dependency on the system input, wherein the modified output of the first constituent decoder is independent of extrinsic information of the second constituent decoder; interleaving the modified output of the first constituent decoder; providing to said second constituent decoder the second parity input and the interleaved modified output of the first constituent decoder; the second constituent decoder producing a second constituent decoder output; and modifying the output of the second constituent decoder to include a statistical dependency on the system input, wherein the modified output of the second constituent decoder is independent of extrinsic information of the first constituent decoder; de-interleaving the modified output of the second constituent decoder; and providing the de-interleaved modified output of the second constituent decoder to the first constituent decoder, wherein the de-interleaved modified output of the second constituent decoder is the feedback input of the first constituent decoder; and processing the second constituent decoder output to produce decoded bits.