Wireless communication system and transmission device

Abstract

The present invention relates to a wireless communication system to properly switch over a transmission method of radio signals corresponding to a configuration of a receiver. The wireless communication system according to the present invention includes a transmitting device having a plurality of antennas and capable of transmitting radio signals different from each other from these antennas, and a receiving device having at least one antenna and receiving the radio signals transmitted from the transmitting device. The receiving device comprises an information transmitting unit transmitting, to the transmitting device, configuration information about a configuration of the receiving device, and the transmitting device includes a transmitting unit transmitting the radio signals by a transmission method corresponding to the configuration information received from the receiving device.

1 . A wireless communication system including a transmitting apparatus that includes a plurality of antennas and can transmit different radio signals from the respective antennas, and a receiving apparatus that includes at least one antenna and receives the radio signals transmitted from the transmitting apparatus,
 the receiving apparatus comprising:
 an information notification unit to expressly notify the transmitting apparatus of information on the number of antennas of the receiving apparatus or information on the number of multiplexed signals concurrently-processable by the receiving apparatus, 
   the transmitting apparatus comprising:
 a transforming unit to transform transmitting signals based on the information on the number of antennas or the information on the number of multiplexed signals which are received from the receiving apparatus; and 
 a transmission unit to transmit radio signals corresponding to the transformed transmitting signals. 
   
   
   
       2 . A wireless communication system including a transmitting apparatus that includes a plurality of antennas and can transmit different radio signals from the respective antennas, and a receiving apparatus that includes at least one antenna and receives the radio signals transmitted from the transmitting apparatus,
 the receiving apparatus comprising:
 an information transmission unit to transmit, to the transmitting apparatus, configuration information on configuration of the receiving apparatus, the configuration information including information on the number of antennas of the receiving apparatus or information on the number of multiplexed signals concurrently-processable by the receiving apparatus, 
   the transmitting apparatus comprising:
 a detection unit to detect the information on the number of antennas or the information on the number of multiplexed signals from the configuration information received from the receiving apparatus; 
 a transforming unit to transform transmitting signals based on the detected information on the number of antennas or the detected information on the number of multiplexed signals; and 
 a transmission unit to transmit radio signals corresponding to the transformed transmitting signals. 
   
   
   
       3 . A wireless communication system including a transmitting apparatus that includes a plurality of antennas and can transmit different radio signals from the respective antennas, and a receiving apparatus that includes at least one antenna and receives the radio signals transmitted from the transmitting apparatus,
 the receiving apparatus comprising:
 an extraction unit to extract, from received radio signals, transmission characteristic information including transmission path information corresponding to an environment where the received radio signals have been transmitted; and 
 an information transmission unit to transmit, to the transmitting apparatus, configuration information on configuration of the receiving apparatus and the extracted transmission characteristic information, the configuration information including information on the number of antennas of the receiving apparatus or information on the number of multiplexed signals concurrently-processable by the receiving apparatus, 
   the transmitting apparatus comprising:
 a detection unit to detect the information on the number of antennas or the information on the number of multiplexed signals from the configuration information received from the receiving apparatus, and detect the transmission path information from the transmission characteristic information received from the receiving apparatus; 
 a transforming unit to transform transmitting signals based on the detected information on the number of antennas or the detected information on the number of multiplexed signals and based on the detected transmission path information; and 
 a transmission unit to transmit radio signals corresponding to the transformed transmitting signals.