Radio communication system and transmitter

Abstract

A radio communication system according to the present invention comprises a transmitter having a plurality of transmission antennas, and a receiver having a mechanism to perform a diversity reception. A plurality of multi-modulators of the transmitter allocates the same transmission data to a plurality of subcarriers, combines all transmission signals obtained by weighting each of the subcarriers, and outputs combined transmission signals. At least one of weight values for the same data is different between the multi-modulators in the weighting processing for each of the carriers.

1 . A radio communication system comprising a base station, and a plurality of mobile terminals that communicate with the base station, wherein 
 a time division multiplexing system is applied for a downlink from the base station to the mobile terminals, wherein in the time division multiplexing system a radio carrier of the link is divided into a plurality of channels in time domain, and each of the channels is allocated to each of the mobile terminals, and    a single channel per carrier system is applied for an uplink from the mobile terminals to the base station, wherein in the single channel per carrier system a plurality of single channel per carrier carriers are used, and a non-multiplexed single channel per carrier carrier is allocated to each of the mobile terminals.    
   
   
       2 . A radio communication system having a structure that allocates single channel per carrier carriers with different frequencies between mobile terminals to an uplink from mobile terminals to a base station.