Radio communication device

Details Radio communication device Radio communication device

2006-07-27

2010-02-09

Ton, Dang T (Department: 2419)

Multiplex communications

Communication over free space

Combining or distributing information via frequency channels

C370S319000, C370S430000, C455S526000

Reexamination Certificate

active

07660288

ABSTRACT:
Disclosed is a wireless communication system capable of performing demodulation at the receiving side without substantially deteriorating BER characteristics, regardless of carrier frequency error existing among plural wireless communication systems in SDMA of uplink. The wireless communication system includes plural antennas; a MIMO processor that decomposes a reception signal the plural antennas received from plural transmitters into transmission signals transmitted from the respective transmitters; a FFT processor that carries out OFDM demodulation; and a demapping unit that obtains data from signals which were previously converted into sub-carrier signals by the FFT processor, in which the MIMO processor is installed ahead of the FFT processor for sake of the processing sequence of a receive signal, and even though a carrier frequency offset exists in the reception signal MIMO processing is performed prior to OFDM demodulation to split the reception signal from plural transmitters.

REFERENCES:
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patent: 2005-175678 (2005-06-01), None
Eduardo F. Casas, et al., OFDM for Data Communication Over Mobile Radio FM Channels-Part I:, IEEE Transaction on Communication, vol. 39, No. 5, May 1991, pp. 783-793.
IEEE Std 802.11a-1999, pp. 1-83.
IEEE Std 802.11g-2003, pp. 1-67.
IEEE802.11-04/0889r5, May 13, 2005.

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