| 摘要 |
PROBLEM TO BE SOLVED: To prevent overhead caused by retransmission, by preventing misoperations of tracking function to a variation, in propagation path on the side of a radio receiver. SOLUTION: A transmission rate of a packet corresponding to each address is determined by a control unit 113. In a joining unit 106, two or more packets are so jointed that a packet is positioned at a position nearer to the head of the frame as the packet has lower transmission rate. In encoding modulation means 108, 109, encoding and modulation for each packet is carried out with an encoding rate and a modulation method corresponding to the transmission rate, which is determined for each packet, and then a joined packet, as one frame, is transmitted. COPYRIGHT: (C)2005,JPO&NCIPI
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