| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a radio transmission system capable of broadband packet transmission with a wide-range cell coverage by varying a spreading factor for transmitted information by using OFCDM. <P>SOLUTION: The radio transmission system is configured to, on the occasion of radio transmission of information between a transmitter and a receiver, perform the radio transmission of information using an orthogonal frequency and code division multiplexing transmission scheme of parallelly transmitting identical information by a plurality of sub-carriers. The radio transmission system has a spreading factor variable control transmitting means for parallelly converting information channel-coded at the transmitter, according to symbols transmitted simultaneously, and for spreading a sequence of parallelized symbols in at least one of a frequency direction and a time direction by a spreading code sequence of a designated spreading factor. <P>COPYRIGHT: (C)2007,JPO&INPIT |
