A MIMO-OFDM SYSTEM USING EIGENBEAMFORMING METHOD

Title:

A MIMO-OFDM SYSTEM USING EIGENBEAMFORMING METHOD

Document Type and Number:

WIPO Patent Application WO2005062729

Kind Code:

A3

Abstract:

Disclosed is a MIMO-OFDM system, wherein the transmitter comprises a serial/parallel converter for converting continuouslyinputted symbols of the number of subcarriers to K parallel signals; a signal reproducer for reproducing K parallel signals by the number of transmit antennas L an eigenmode generator for generating eigenbeam of the reproduced signals outputted from the signal reproducer at each subcarrier, on the basis of Nf eigenbeam forming vectors which are fed backlong-term and information of a best eigenbeam forming vector at each subcarrier which is fed back short-term, through the feedback device; and aplurality of inverse Fourier converters for receiving the signals outputted from the eigenmode generator and generating an OFDM symbol.

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Inventors:

CHOI IN-KYEONG (KR)
KIM SEONG-RAG (KR)
KWON DONG-SEUNG (KR)
CHOI JIN-HO (AU)

Application Number:

PCT/KR2004/003065

Publication Date:

January 26, 2006

Filing Date:

November 25, 2004

Export Citation:

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Assignee:

KOREA ELECTRONICS TELECOMM (KR)
CHOI IN-KYEONG (KR)
KIM SEONG-RAG (KR)
KWON DONG-SEUNG (KR)
CHOI JIN-HO (AU)

International Classes:

H04B7/04; H04J99/00; H04L1/06; H04L25/03; (IPC1-7): H04B7/06; H04L27/26

Domestic Patent References:

WO2002033850A1	2002-04-25
WO2003081803A1	2003-10-02

Other References:

WONG K.K. ET AL: "Adaptive Antennas at the Mobile and Base Stations in an OFDM/TDMA System", IEEE TRANSACTIONS ON COMMUNICATIONS, vol. 49, no. 1, January 2001 (2001-01-01), pages 195 - 206, XP001038831
PAN Y.H. ET AL: "Dynamic Sub-channel Allocation with Adaptive Beamforming for Broadband OFDM Wireless Systems", IEEE GLOBAL TELECOMUNICATIONS CONFERENCE, vol. 1, 17 November 2002 (2002-11-17) - 21 November 2002 (2002-11-21), pages 711 - 715, XP010636043

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