| 摘要 |
PROBLEM TO BE SOLVED: To perform high quality communication in multiple-input multiple-output communication for canceling the interference of simultaneously received signals by using a parallel interference canceler. SOLUTION: Each transmission antenna branch 22 is provided with an amplitude enlarging processing part 25 for enlarging the amplitude of modulation signals, and setting is performed so that the amplitude enlarging processing part 25#1 of the transmission antenna branch 22#1 enlarges the amplitude of the modulation signals to be α<SB>1</SB>times and the amplitude enlarging processing parts 25#2-Nt of the transmission antenna branches 22#2-Nt enlarge the amplitude of the modulation signals to be α<SB>2</SB>times (α<SB>1</SB>>α<SB>2</SB>). That is, on the side of the transmitter 20, signal power larger than the one of the other transmission antenna branches 22#2-Nt is allocated to one transmission antenna branch 22#1, and the signal separation accuracy of the sub stream of one transmission antenna branch 22#1 is improved. Thus, since the decoding performance of the sub stream of the one transmission antenna branch 22#1 becomes high, the entire decoding performance is improved and communication quality is improved more than before. COPYRIGHT: (C)2007,JPO&INPIT |
