Radio communication apparatus and radio communication method

Details Radio communication apparatus and radio communication method Radio communication apparatus and radio communication method

2005-12-22

2009-08-25

Payne, David C (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C370S210000

Reexamination Certificate

active

07580446

ABSTRACT:
Radio communication apparatus includes unit dividing transmit data into first-and-second streams, unit subjecting first-and-second streams to serial-to-parallel conversion to obtain data signals, unit modulating data signals into OFDM-modulation signals corresponding to first and second streams using subcarriers, unit acquiring channel responses between communication and receiving apparatuses, unit computing singular values λ1(k)and λ2(k)of channel matrix corresponding to kthsubcarrier in subcarriers, based on channel responses, unit assigning weights corresponding to singular values λ1(k)and λ2(k)to first-and-second streams where correspondence of weights to streams is different by subcarrier, unit multiplying, by each of assigned weights, OFDM-modulation signals corresponding to each of first and second streams, and acquire first-and-second signals corresponding to first-and-second streams, unit adding first-and-second signals to acquire added signals, unit subjecting added signals to inverse-Fourier transform, and unit transmitting, to receiving apparatus, signals output from subjecting unit.

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