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公开(公告)号:BRPI0515010A
公开(公告)日:2008-07-01
申请号:BRPI0515010
申请日:2005-08-11
Applicant: INTERDIGITAL TECH CORP
Inventor: KWAK JAEYOUNG , OLESEN ROBERT LIND , BULTAN AYKUT , ZEIRA ELDAD , KOO CHANG-SOO , OZLUTURK FATIH , HUANG YUEJIN , PASAD KALPENDU R
Abstract: The present invention is related to a method and apparatus for implementing space frequency block coding (SFBC) in an orthogonal frequency division multiplexing (OFDM) wireless communication system. The present invention is applicable to both a closed loop mode and an open loop mode. In the closed loop mode, power loading and eigen-beamforming are performed based on channel state information (CSI). A channel coded data stream is multiplexed into two or more data streams. Power loading is performed based on the CSI on each of the multiplexed data streams. SFBC encoding is performed on the data streams for each of the paired subcarriers. Then, eigen-beamforming is performed based on the CSI to distribute eigenbeams to multiple transmit antennas. The power loading may be performed on two or more SFBC encoding blocks or on each eigenmodes. Additionally, the power loading may be performed across subcarriers or subcarrier groups for weak eigenmodes.
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公开(公告)号:AU2007219360A1
公开(公告)日:2007-10-18
申请号:AU2007219360
申请日:2007-09-27
Applicant: INTERDIGITAL TECH CORP
Inventor: DICK STEPHEN G , KWAK JAEYOUNG
IPC: H04B17/00
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公开(公告)号:NO20070080L
公开(公告)日:2007-03-05
申请号:NO20070080
申请日:2007-01-05
Applicant: INTERDIGITAL TECH CORP
Inventor: GRIECO DONALD M , PAN JUNG-LIN , KWAK JAEYOUNG
IPC: H04J3/00 , H04B1/707 , H04B1/7105 , H04J13/00
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44.
公开(公告)号:MXPA06014382A
公开(公告)日:2007-02-19
申请号:MXPA06014382
申请日:2005-05-31
Applicant: INTERDIGITAL TECH CORP
Inventor: GRIECO DONALD M , PAN JUNG-LIN , KWAK JAEYOUNG
Abstract: Se describe un metodo y un aparato para reducir el procesamiento multiusuario en el receptor (22) en sistemas de comunicacion inalambrica. Los codigos detectados (32) son agrupados de acuerdo a una respuesta de impulso de canal y siendo identificado un codigo original (36) por cada grupo de codigos detectados. Se construye una matriz A (40) y se efectua una deteccion conjunta (42) usando los codigos originales identificados. Los simbolos de datos de los codigos detectados son obtenidos de los simbolos de datos de los codigos originales identificados.
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公开(公告)号:AU2005306875A1
公开(公告)日:2006-05-26
申请号:AU2005306875
申请日:2005-11-01
Applicant: INTERDIGITAL TECH CORP
Inventor: KWAK JAEYOUNG , BULTAN AYKUT , KOO CHANG-SOO , OLESEN ROBERT LIND , OZLUTURK FATIH
Abstract: The invention relates to a method and a transmitter for transmitting data using multiple-input multiple-output, MIMO, orthogonal frequency division multiplexing, OFDM, the method comprising: a transmitter generating at least one input data stream; the transmitter generating a plurality of spatial streams; the transmitter determining a transmission coding scheme, and processing the input data stream in accordance with the transmission coding scheme to generate at least two spatial streams, the transmission coding scheme being one of spatial multiplexing, SM, without frequency diversity, FD, wherein one data symbol is sent per one sub-carrier for each spatial stream; and the transmitter transmitting the at least two spatial streams via the generated spatial streams.
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46.
公开(公告)号:MXPA05000828A
公开(公告)日:2005-04-19
申请号:MXPA05000828
申请日:2003-07-18
Applicant: INTERDIGITAL TECH CORP
Inventor: KWAK JAEYOUNG
IPC: H04B1/707 , H04B7/04 , H04B7/08 , H04L1/06 , H04L25/02 , H04L25/03 , H03D1/04 , H03D1/06 , H03K5/01 , H03K6/04 , H04B1/10 , H04L1/00 , H04L25/08
Abstract: Una pluralidad de senales de datos son recibidas sobre un arreglo de antena que tiene una pluralidad de elementos de antena. Las senales de datos son transmitidas sobre un espectro compartido en un sistema de comunicacion inalambrico. Una senal que tiene cada una de las senales de datos es recibida sobre cada elemento de la antena. La pluralidad de senales de datos estan agrupadas en una pluralidad de grupos. Las senales recibidas de los elementos de la antena son filtradas igualadas (70) por un primer grupo de la pluralidad de grupos, produciendo un resultado filtrado igualado. Los datos son detectados conjuntamente del primer grupo usando el resultado filtrado igualado. Se construye una senal de correccion de interferencia (76) usando los datos detectados por cada elemento de la antena. El resultado cancelado por la interferencia es sustraida (92) de la senal recibida de cada elemento de la antena, produciendo un resultado cancelado por interferencia por cada elemento de la antena. Los datos son detectados sucesivamente por los grupos restantes usando el resultado cancelado por la interferencia por cada elemento de la antena.
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公开(公告)号:AU2011265400B2
公开(公告)日:2013-02-07
申请号:AU2011265400
申请日:2011-12-21
Applicant: INTERDIGITAL TECH CORP
Inventor: KWAK JAEYOUNG , OLESEN ROBERT LIND , BULTAN AYKUT , ZEIRA ELDAD , KOO CHANG-SOO , OZLUTURK FATIH , HUANG YUEJIN , PASAD KALPENDU R
Abstract: The present invention is related to a method and apparatus for implementing space frequency block coding (SF8C) in an orthogonal frequency division multiplexing (OFDM) wireless communication system. The present invention is applicable to both a closed loop mode and an open loop mode. In the closed mode, power loading and eigen-beamforming are performed based on channel state information (CSI). A channel coded data stream is multiplexed into two or more data streams. Power loading is performed based on the CS1 on each of the multiplexed data streams. SFBC encoding is preformed on the data streams for each of the paired subcarriers. Then, eigen-beamforming is performed based on the CSI to distribute elgenbemas to multiple transmit antennas. The power loading may be performed on two or more SFBC encoding blocks or on each eigenmodes. Additionally, the power loading may be performed across the subcarriers or subcarrier groups for weak eigenmodes. r CO LuL co COMBNER C3r LuU Cf) C c:) FETE L LMADING UNIT C [ FEE UNIT IFPT UNIT C Co) f- POWER LOADING UNIT
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公开(公告)号:AU2012241132A1
公开(公告)日:2012-11-08
申请号:AU2012241132
申请日:2012-10-16
Applicant: INTERDIGITAL TECH CORP
Inventor: KWAK JAEYOUNG , KOO CHANG-SOO , OLESEN ROBERT LIND , BULTAN AYKUT , OZLUTURK FATIH
Abstract: A method and apparatus for combining space-frequency block coding (SFBC), spatial multiplexing (SM) and beam-forming in a multiple-input multiple output (MIMO) orthogonal frequency division multiplexing (OFDM) system. The system includes a transmitter with a plurality of transmit antennas and a receiver with a plurality of receive antennas. The transmitter generates at least one data stream and a plurality of spatial streams. The number of generated spatial streams is based on the number of the transmit antennas and the number of the receive antennas. The transmitter determines a transmission scheme in accordance with at least one of the SFBC, SM and beam forming. The transmitter transmits data in the data stream to the receiver based on the selected transmission scheme.
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公开(公告)号:MY143899A
公开(公告)日:2011-07-29
申请号:MYPI20053749
申请日:2005-08-11
Applicant: INTERDIGITAL TECH CORP
Inventor: KWAK JAEYOUNG , OLESEN ROBERT L , BULTAN AYKUT , ZEIRA ELDAD , KOO CHANG-SOO , OZLUTURK FATIH M , HUANG YUEJIN , PASAD KALPENDU R
Abstract: THE PRESENT INVENTION IS RELATED TO A METHOD AND APPARATUS FOR IMPLEMENTING SPACE FREQUENCY BLOCK CODING (SFBC) IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) WIRELESS COMMUNICATION SYSTEM. THE PRESENT INVENTION IS APPLICABLE TO BOTH A CLOSED LOOP MODE AND AN OPEN LOOP MODE. IN THE CLOSED LOOP MODE, POWER LOADING AND EIGEN-BEAM FORMING ARE PERFORMED BASED ON CHANNEL STATE INFORMATION (CSI). A CHANNEL CODED DATA STREAM IS MULTIPLEXED INTO TWO OR MORE DATA STREAMS. POWER LOADING IS PERFORMED BASED ON THE CSI ON EACH OF THE MULTIPLEXED DATA STREAMS. SFBC ENCODING IS PERFORMED ON THE DATA STREAMS FOR EACH OF THE PAIRED SUBCARRIERS. THEN, EIGEN-BEAMFORMING IS PERFORMED BASED ON THE CSI TO DISTRIBUTE EIGENBEAMS TO MULTIPLE TRANSMIT ANTENNAS. THE POWER LOADING MAY BE PERFORMED ON TWO OR MORE SFBC ENCODING BLOCKS OR ON EACH EIGENMODES. ADDITIONALLY, THE POWER LOADING MAY BE PERFORMED ACROSS SUBCARRIERS OR SUBCARRIER GROUPS FOR WEAK EIGENMODES.
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50.
公开(公告)号:DE602005021781D1
公开(公告)日:2010-07-22
申请号:DE602005021781
申请日:2005-05-31
Applicant: INTERDIGITAL TECH CORP
Inventor: PAN JUNG-LIN , KWAK JAEYOUNG , GRIECO DONALD M
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