| 摘要 |
PROBLEM TO BE SOLVED: To provide a digital radio communication system that uses the likelihood with high accuracy so as to enhance error correction capability of multi- valued modulated signal thereby improving the transmission quality. SOLUTION: An encoding section 11 subjects an each predetermined error- detection unit of data to error-detection encoding. A multinary modulation section 12 disposes coded data, included in error-detection units in one transmission unit and transmits the transmission unit. A first decoding section 17 decodes the received signal and detects errors, in the decoded signal for each error- detection unit. A second decoding section 18 changes the likelihood of each bit, on the basis of the result of the error detection by the first decoding section 17. |
