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INFORMATION DECODING AND ENCODING METHOD,INFORMATION COMMUNICATION METHOD, INFORMATION DECODING DEVICE, TRANSMITTING DEVICE, AND INFORMATION COMMUNICATION SYSTEM
INFORMATION DECODING AND ENCODING METHOD,INFORMATION COMMUNICATION METHOD, INFORMATION DECODING DEVICE, TRANSMITTING DEVICE, AND INFORMATION COMMUNICATION SYSTEM
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机译:信息解码和编码方法,信息通信方法,信息解码设备,发送设备和信息通信系统
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摘要
PROBLEM TO BE SOLVED: To realize reduction in calculation load and improvement in error rate characteristics when decoding a received word acquired by receiving a coded word via a communication path, which is subjected to block encoding.;SOLUTION: In a method for decoding the received word which is acquired by receiving the coded word transmitted via the communication path after applying LDPC encoding to an information word added with a CRC code, the method is performed by the steps of producing (100) estimated word X by calculating likelihood of each bit of the estimated word X in accordance with the LLR-BP decoding algorithm, determining (102) whether the estimated word X satisfies a parity check equation or not, producing (106) an estimated word C satisfying the parity check equation by repeating the LDPC encoding using a part of reliable information from the estimated word X based on the likelihood of each bit of the estimated word X in accordance with OSD algorithm when the determination is denied, and repeating error detection (110) using the CRC code to the estimated word C. Then the estimated word C is outputted (112) as an effective estimation result when the estimated word C is determined to have no error (determination of the step 110 is affirmative), and decoding of the received word is terminated.;COPYRIGHT: (C)2006,JPO&NCIPI
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