| 摘要 |
<P>PROBLEM TO BE SOLVED: To transmit a control channel efficiently, reduce consumption of useless transmission power of the control channel, and keep and improve the reception quality of the control channel in a communication system, a transmitter and a receiver. <P>SOLUTION: A transmitter 10 comprises a section 12 for selectively controlling the number of control channel transmitting antennas, a control channel generator 11, and a transmitter 13. The section 12 selects the number of transmitting antennas for transmitting a control channel based on a transmission quality information transferred from a quality information measuring section 23 of a receiver 20. The control channel generator 11 generates a control channel at a control channel area in a transmission frame of a radio signal of the selected number of transmitting antennas. The control channel stores a multiplexed transmission control information obtained by multiplexing a transmission control information of a radio signal of each transmitting antenna. The transmitter 13 transmits the control channel. One or a maximum number of antennas or corresponding numbers of antennas according to the transmission quality information are selected for transmitting the control channel. <P>COPYRIGHT: (C)2008,JPO&INPIT |
