| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To obtain a high encoding gain regardless of a reception line quality in a reception apparatus used in a satellite broadcast system, satellite communication system, ground broadcast system or ground communication system. <P>SOLUTION: The present invention relates to a reception apparatus comprising an FEC device for performing predetermined decoding processing including soft decision Viterbi decoding based on a reception signal after code division multiplex (CDM) demodulation, and the apparatus comprises a threshold change section configured to compare data before predetermined decoding processing with data after predetermined decoding processing and to change intervals of a threshold for calculating soft decision data used to soft decision Viterbi decoding if a result of the comparison does not fulfill a predetermined criterion, and a Viterbi decoding section for performing soft decision Viterbi decoding based on the calculated soft decision data. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
