RADIO TRANSMISSION DEVICE AND RADIO TRANSMISSION METHOD

摘要

Data streams accumulated in a buffer (101) are modulated in a modulator (102). A multiplier (103) multiplies a signal output from the modulator (102) by a weight output from a weight controller (112). The signal output from the multiplier (103) is added in an adder (104), subjected to radio transmission processing by a transmission radio section (105), and transmitted via an antenna (106). A buffer controller (111) controls the buffer (101) according to a retransmission count output from a retransmission count detector (158). The weight controller (112) outputs a different weight from the previous transmission to the multiplier (103) each time data is retransmitted. Thus, it is possible to increase the diversity gain upon data retransmission even when the temporal change of the radio signal propagation path environment is moderate.