SIGNAL PROCESSING DEVICE AND TRANSMISSION DEVICE

• Main Author: KOGANEI YOHEI
• Format: Patent
• Language: English; Japanese
• Published: 08.03.2023
• Subjects: BASIC ELECTRONIC CIRCUITRY; CODE CONVERSION IN GENERAL; CODING; DECODING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

To provide a signal processing device and a transmission device, having improved error correction performance.SOLUTION: A signal processing device includes: a first soft decision unit configured to perform soft decision of a value of, among a plurality of bit strings, a predetermined bit string encoded with a soft decision code from a symbol assigned to, according to each value of the plurality of bit strings, the plurality of bit strings having been subject to encoding of an outer code with a turbo product code and encoding of an inner code with the soft decision code; a first decoding unit configured to decode the predetermined bit string with the soft decision code on the basis of a result of the soft decision performed by the first soft decision unit; a second soft decision unit configured to individually perform, from the symbol, the soft decision of a value of each bit string other than the predetermined bit string among the plurality of bit strings; and a second decoding unit configured to decode the plurality of bit strings with the turbo product code on the basis of a result of the decoding performed by the first decoding unit and a result of the soft decision performed by the second soft decision unit.SELECTED DRAWING: Figure 5 【課題】 誤り訂正性能が向上した信号処理装置及び伝送装置を提供する。【解決手段】 信号処理装置は、ターボプロダクト符号による外符号の符号化、及び軟判定符号による内符号の符号化が施された複数のビット列に対し、前記複数のビット列の各値に応じて割り当てられたシンボルから、前記複数のビット列のうち、前記軟判定符号により符号化された所定のビット列の値を軟判定する第１軟判定部と、前記第１軟判定部の軟判定の結果に基づいて前記所定のビット列を前記軟判定符号により復号化する第１復号化部と、前記シンボルから、前記複数のビット列のうち、前記所定のビット列以外の各ビット列の値を個別に軟判定する第２軟判定部と、前記第1復号化部による復号化の結果及び前記第２軟判定部の軟判定の結果に基づいて前記ターボプロダクト符号により前記複数のビット列の復号化を行う第２復号化部とを有する。【選択図】図５