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公开(公告)号：AU2005274162A1
公开(公告)日：2006-02-23
申请号：AU2005274162
申请日：2005-07-27
Applicant: INTERDIGITAL TECH CORP
Inventor： KOO CHANG-SOO , OLESEN ROBERT LIND , TSAI YINGMING , ZHANG GUODONG , HUANG YUEJIN
Abstract: A method and system for link adaptation in an orthogonal frequency division multiplexing (OFDM) wireless communication system are disclosed. The entire sub-channels are divided into a plurality of groups. A channel quality indicator (CQI) is generated for each group based on channel quality status in each group, and communication parameters are adjusted in accordance with the CQI.
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公开(公告)号：AU2005272789A1
公开(公告)日：2006-02-23
申请号：AU2005272789
申请日：2005-08-11
Applicant: INTERDIGITAL TECH CORP
Inventor： KWAK JAEYOUNG , BULTAN AYKUT , HUANG YUEJIN , OZLUTURK FATIH , ZEIRA ELDAD , OLESEN ROBERT LIND , PASAD KALPENDU R , KOO CHANG-SOO
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：NO20051520L
公开(公告)日：2005-03-22
申请号：NO20051520
申请日：2005-03-22
Applicant: INTERDIGITAL TECH CORP
Inventor： ZEIRA ARIELA , PAN JUNG-LIN , HUANG YUEJIN
Abstract: A wireless communication apparatus for performing an extended algorithm (EA) with over-sampling, the apparatus comprising: - a first input (105) receiving a signal; - a second input (110) for receiving a channel impulse response; - a first zero padding unit (115) for zero padding the received signal in the tail until the length of sequence achieves length Lm and output a first output; - a second zero padding unit (125) for zero padding the channel impulse response in the tail until the length of the extended sequence achieves length Lm and outputting a second output; - a first processing unit (135) for performing a discrete Fourier Transform (DFT) or fast Fourier transform (FFT) on the zero padded received signal; - a second processing unit (140) for performing a DFT or FFT on the zero padded channel impulse response; - a conjugate unit (145) for conjugating the transformed zero padded channel impulse response; and - a multiplier (150) for multiplying the transformed zero padded received signal with the conjugated transformed zero padded channel impulse response.
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公开(公告)号：MY154510A
公开(公告)日：2015-06-30
申请号：MYPI20090274
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 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- BEAMFORMING (122) 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 PERFORMED ON THE DATA STREAMS FOR EACH OF THE PAIRED SUBCARRIES. THEN, EIGEN-BEAMFORMING IS PERFORMED BASED ON THE CSI TO DISTRIBUTE EIGENBEAMS TO MULTIPLE TRANSMIT ANTENNAS (226). THE POWER LOADING MAY BE PERFORMED ON TWO OR MORE SFBC ENCODIN BLOCKS OR ON EACH EIGENMODES. ADDITIONALLY, THE POWER LOADING MAY BE PERFORMED ACROSS SUBCARRIES OR SUBCARRIER GROUPS FOR WEAK EIGENMODES.
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公开(公告)号：AT527794T
公开(公告)日：2011-10-15
申请号：AT10150446
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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Patent Agency Ranking
公开(公告)号：DE602005019062D1
公开(公告)日：2010-03-11
申请号：DE602005019062
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：AR066342A2
公开(公告)日：2009-08-12
申请号：ARP080101805
申请日：2008-04-29
Applicant: INTERDIGITAL TECH CORP
Inventor： BULTAN AYKUT , HUANG YUEJIN , ZEIRA ELDAD , KOO CHANG-SOO , OLESEN ROBERT L , PASAD KALPENDU R , OZLUTURK FATIH M , KWAK JAEYOUNG
Abstract: Un método para implementar codificacion por bloques en espacio y frecuencia (SFBC) para transmisiones multiplex por division de frecuencia ortogonal (OFDM) de entradas multiples/salidas multiples (MIMO), método que comprende: realizar unacodificacion de canal en al menos dos corrientes de datos; recibir informacion del estado del canal (CSI) de un canal MIMO; calcular energía del canal para modos propios del canal MIMO; calcular relaciones de interferencia y de senal-ruido armonicas(SNIRs) para los modos propios en base a la energía del canal calculada; calcular separacion de las SNIRs armonicas; determinar una velocidad de datos que pueda ser soportada en base a la CSI; agrupar modos propios en un orden de la energía delcanal de los modos propios; distribuir velocidades de bits entre los modos propios en base a la separacion de las SNIRs; mapear pares de corrientes de datos codificados a pares de modos propios para la transmision. También se divulga un aparato paraimplementar la codificacion por bloques en espacio y frecuencia (SFBC) para transmisiones multiplex por division de frecuencia ortogonal (OFDM) de entradas multiples/salidas multiples (MIMO) que emplea al método.
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公开(公告)号：DE60326149D1
公开(公告)日：2009-03-26
申请号：DE60326149
申请日：2003-09-09
Applicant: INTERDIGITAL TECH CORP
Inventor： PAN JUNG-LIN , HUANG YUEJIN , ZEIRA ARIELA
Abstract: A wireless communication apparatus for performing an extended algorithm (EA) with over-sampling, the apparatus comprising: - a first input (105) receiving a signal; - a second input (110) for receiving a channel impulse response; - a first zero padding unit (115) for zero padding the received signal in the tail until the length of sequence achieves length Lm and output a first output; - a second zero padding unit (125) for zero padding the channel impulse response in the tail until the length of the extended sequence achieves length Lm and outputting a second output; - a first processing unit (135) for performing a discrete Fourier Transform (DFT) or fast Fourier transform (FFT) on the zero padded received signal; - a second processing unit (140) for performing a DFT or FFT on the zero padded channel impulse response; - a conjugate unit (145) for conjugating the transformed zero padded channel impulse response; and - a multiplier (150) for multiplying the transformed zero padded received signal with the conjugated transformed zero padded channel impulse response.
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公开(公告)号：AU2005272789B2
公开(公告)日：2009-02-05
申请号：AU2005272789
申请日：2005-08-11
Applicant: INTERDIGITAL TECH CORP
Inventor： KWAK JAEYOUNG , BULTAN AYKUT , HUANG YUEJIN , OZLUTURK FATIH , ZEIRA ELDAD , OLESEN ROBERT LIND , PASAD KALPENDU R , KOO CHANG-SOO
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：DK1582008T3
公开(公告)日：2008-01-21
申请号：DK04700894
申请日：2004-01-08
Applicant: INTERDIGITAL TECH CORP
Inventor： PAN JUNG-LIN , HUANG YUEJIN , GRIECO DONALD M
IPC: H04B1/707
Abstract: A wireless transmit/receive unit (WTRU) is configure to receive and sample wireless signals in a shared spectrum where the wireless signal comprise encoded symbols. The WTRU has a channel estimation device configured to process received signal samples to produce an estimate of a channel response of the received signals corresponding to a matrix H. The channel estimation device is preferably configured to process the received signal samples to produce an estimate of noise variance of the received signals. The WTRU preferably has a two stage data estimator that includes a channel equalizer and a despreader. The channel equalizer is configured to process received signal samples using the estimated channel response matrix H and the estimate of noise variance to produce a spread signal estimate of the received signals. The despreader is configured to process the spread signal estimate of the received signals produced by said channel equalizer to recover encoded symbols of the received signals.
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