| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a data transmission device and a data receiving device which, while maintaining tolerance to errors properly, can achieve high transmission efficiency. <P>SOLUTION: The data transmission device classifies input data into data which each have predetermined plural levels of priority, and when superposing each of these data on subcarriers differing in reliability before they are transmitted, superposes data having the n'th high priority among the data subjected to primary modulation processing on a subcarrier having the n'th high reliability among a plurality of subcarriers before transmitting the data. The data receiving device shares the same subcarrier reliability information as that on the transmission side, so that after acquiring data which each have plural levels of priority, it combines them to produce received data. <P>COPYRIGHT: (C)2013,JPO&INPIT |
