| 摘要 |
A spread code to be allocated to transmission data is changed at a previous transmitting time and a next transmission time. For example, at transmission of the first packet (first transmission), symbols "1" to "4" are spread by spread code #0, while at transmission of the second packet (retransmission), symbols "1" to "4" are spread by spread code #1. As a result, since despread signals of the respective symbols obtained by a plurality of reception times on a receiver side are synthesized, it is possible to eliminate a reception symbol having an extremely small reception level, so that reception quality can be improved. <IMAGE> |
