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公开(公告)号：HK1175040A1
公开(公告)日：2013-06-21
申请号：HK13101882
申请日：2007-10-10
Applicant: INTERDIGITAL TECH CORP
Inventor： KWAK JAEYOUNG , OLESEN ROBERT LIND L , BULTAN AYKUT , ZEIRA ELDAD , KOO CHANG-SOO , OZLUTURK FATIH , HUANG YUEJIN , PASAD KALPENDU R R
IPC: H04B20060101 , H04J99/00 , H04L20060101
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公开(公告)号：SG170650A1
公开(公告)日：2011-05-30
申请号：SG2009073610
申请日：2005-11-01
Applicant: INTERDIGITAL TECH CORP
Inventor： KWAK JAEYOUNG , KOO CHANG-SOO , OLESEN ROBERT LIND , BULTAN AYKUT , OZLUTURK FATIH
IPC: H04J99/00
Abstract: A method and apparatus for combining space-frequency block coding (SFBC), spatial multiplexing (SM) and beamforming in a multiple-input multiple-output (MIMO) orthogonal frequency division mutliplexing (OFDM) system. The system inlcudes a transmitter (110) with a plurality of transmit antennas (126) and a receiver (130) with a plurality of receive antennas (128). The transmitter generates generates at least one data stream and plurality of spatial streams (118). 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 SFBC (112), SM (114), and beam forming (122). 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：SG155207A1
公开(公告)日：2009-09-30
申请号：SG2009053570
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：DE60317697T2
公开(公告)日：2008-10-30
申请号：DE60317697
申请日：2003-09-30
Applicant: INTERDIGITAL TECH CORP
Inventor： BULTAN AYKUT , GRIECO DONALD M
Abstract: A digital timing synchronizer of a receiver is provided for timing synchronization to a transmitter in a wireless communication system, wherein the received signal has a timing error with respect to a reference code. A channel estimator estimates an initial code phase of the received signal. A code generator generates a timing reference code that is adjustable by integer increments. An interpolation feedback circuit is configured for interpolation and correction of the timing error, whereby the interpolation is achieved through an integer code shift, plus a quantized fractional adjustment selected from a look-up table of quantized fractional adjustment values and their associated predetermined interpolator coefficients, from which a time corrected version of the received signal is produced.
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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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Patent Agency Ranking
公开(公告)号：MX2008001090A
公开(公告)日：2008-03-11
申请号：MX2008001090
申请日：2006-07-17
Applicant: INTERDIGITAL TECH CORP
Inventor： YANG RUI , BULTAN AYKUT , PAN KYLE JUNG-LIN , KEARNEY KENNETH P
IPC: H04B1/00
Abstract: Un metodo y aparato para corregir automaticamente la frecuencia de un oscilador local de un receptor. Se genera una secuencia de codigos de canal piloto comun primario (CPICH) por un generador de codigos de CPICH en base a una senal de identificacion de celda de referencia y una senal de inicio de cuadro. La secuencia de codigo de CPICH no propagada recibida se usa para generar una senal de error de frecuencia estimada. Un generador de voltaje de control en base a la senal de error de frecuencia estimada genera una senal de voltaje de control. El generador de codigo de CPICH genera la secuencia de codigos de CPICH en base a las senales recibidas de una celda de servicio de acceso de paquetes de enlace descendente de alta velocidad (HSDPA) cuando esta inactivo el HSDPA, o una celda de referencia de sincronizacion cuando no esta activo el HSDPA. La presente invencion logra ganancia completa de combinacion de relacion maxima cuando se usa diversidad de transmision de espacio-tiempo (STTD), aun sin recibir una indicacion de diversidad de transmision.
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公开(公告)号：DE60317697D1
公开(公告)日：2008-01-03
申请号：DE60317697
申请日：2003-09-30
Applicant: INTERDIGITAL TECH CORP
Inventor： BULTAN AYKUT , GRIECO DONALD M
Abstract: A digital timing synchronizer of a receiver is provided for timing synchronization to a transmitter in a wireless communication system, wherein the received signal has a timing error with respect to a reference code. A channel estimator estimates an initial code phase of the received signal. A code generator generates a timing reference code that is adjustable by integer increments. An interpolation feedback circuit is configured for interpolation and correction of the timing error, whereby the interpolation is achieved through an integer code shift, plus a quantized fractional adjustment selected from a look-up table of quantized fractional adjustment values and their associated predetermined interpolator coefficients, from which a time corrected version of the received signal is produced.
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公开(公告)号：NO20071291L
公开(公告)日：2007-05-07
申请号：NO20071291
申请日：2007-03-09
Applicant: INTERDIGITAL TECH CORP
Inventor： BULTAN AYKUT , PIETRASKI PHILIP J , OZLUTURK FATIH
Abstract: A method and apparatus for radio resources control in a multiple input multiple output (MIMO) orthogonal frequency division multiplexing (OFDM) communication system are disclosed. Radio resources are controlled by producing and applying a respective adaptive modulation and coding to each data stream. Applying a respective transmit power level to that data stream and mapping that data stream to a plurality of antennas. Each of the plurality of data streams are transmitted over different subcarriers, has a different adaptive modulation and coding (AM&C) and a different transmit power than others of the plurality of data streams.
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公开(公告)号：MXPA06003494A
公开(公告)日：2006-06-08
申请号：MXPA06003494
申请日：2004-09-02
Applicant: INTERDIGITAL TECH CORP
Inventor： BULTAN AYKUT
Abstract: Se describe un metodo para sincronizacion de bloque de un receptor en un sistema inalambrico de comunicacion en donde los datos son transmitidos en unidades de bloque en un ambiente de trayectorias multiples que comienza por la extraccion de muestras de datos por un tamano de intervalo predeterminado. Se genera una secuencia de entrenamiento que corresponde a un parametro de celda dado. Los datos se relacionan con la secuencia de entrenamiento sobre retrasos diferentes para colocar la posicion de la primera trayectoria significativa, la cual define el inicio del bloque. Los datos relacionados se acumulan N veces para cada posicion de retraso para producir por lo menos un vector de acumulacion. El valor de trayectoria y la posicion mas significativas se determinan de manera que sean el valor mas grande entre los vectores de acumulacion. Se calcula un valor de correccion de sincronizacion de bloque en base en la diferencia entre la primera posicion de trayectoria significativa y una desviacion de bloque denominada constante. Se ajusta la sincronizacion de bloque en base en el valor de correccion de sincronizacion de bloque.
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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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