Iterative concatenated code decoding circuit and encoding/decoding system using the same

An iterative concatenated code decoding circuit, comprising an inner decoder for decoding the encoded data received through a transmission path and correcting the errors of said data, a deinterleaver for deinterleaving the data decoded by said inner decoder, an outer decoder for decoding the deinterleaved data and correcting the errors of said data, and an interleaver for interleaving the data decoded by said outer decoder, in which said inner decoder, said deinterleaver, said outer decoder and said interleaver are disposed at N (N is a positive integer) stages, said iterative concatenated code decoding circuit employing a concatenated code concatenating two codes of an outer code and an inner code, in which an coding ratio of each of said inner code and said outer code is represented by (code-word length−redundancy check length)/(code-word length),

• wherein said inner decoder decodes said inner code with a high coding ratio, and said outer decoder decodes said outer code with a low coding ratio.

An encoding/decoding system, comprising an encoding device for encoding a concatenated code concatenating two codes of an outer code and an inner code, and a decoding device including an iterative concatenated code decoding circuit for decoding said concatenated code, in which an coding ratio of each of said inner code and said outer code is represented by (code-word length−redundancy check length)/(code-word length),

• wherein said encoding device comprises an inner encoder for encoding said inner code with a high coding ratio, and an outer encoder for encoding said outer code with a low coding ratio, and said iterative concatenated code decoding circuit comprises an inner decoder for decoding said inner code with the high coding ratio, and an outer decoder for decoding said outer code with the low coding ratio,
• wherein said inner decoder and said outer decoder are disposed at multiple stages.

An encoding/decoding system comprising an encoding device for encoding a concatenated code concatenating two codes of an outer code and an inner code, and an inner decoder for decoding the encoded data received through a transmission path from said encoding device and correcting the errors of said data, a deinterleaver for deinterleaving the decoded data, an outer decoder for decoding the deinterleaved data and correcting the errors of said data, and an interleaver for interleaving the data decoded by said outer decoder, in which said inner decoder, said deinterleaver, said outer decoder and said interleaver are disposed at N (N is a positive integer) stages, said iterative concatenated code decoding circuit employing the concatenated code concatenating two different outer code and inner code, in which an coding ratio of each of said inner code and said outer code is represented by (code-word length−redundancy check length)/(code-word length),

• wherein said encoding device has an inner encoder for encoding said inner code with a high coding ratio, and an outer encoder for encoding said outer code with a low coding ratio, and said inner decoder decodes said inner code with the high coding ratio, and said outer decoder decodes said outer code with the low coding ratio.