公开(公告)号：CA2544960A1

公开(公告)日：2005-05-26

申请号：CA2544960

申请日：2004-11-03

Applicant: INTERDIGITAL TECH CORP

Inventor： GRIECO DONALD M ,  BULTAN AYKUT ,  PAN JUNG-LIN ,  DENNEAN CHARLES

IPC: H04B7/216 ,  H04B1/707 ,  H04B7/26 ,  H04L20060101 ,  H04L7/04 ,  H04W56/00

公开(公告)号：NO20052000D0

公开(公告)日：2005-04-25

申请号：NO20052000

申请日：2005-04-25

Applicant: INTERDIGITAL TECH CORP

Inventor： GRIECO DONALD M ,  BULTAN AYKUT

IPC: H04B1/707 ,  H04L7/00 ,  H04L7/02 ,  H04L25/02 ,  H04L

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.

公开(公告)号：CA2501108A1

公开(公告)日：2004-04-15

申请号：CA2501108

申请日：2003-09-30

Applicant: INTERDIGITAL TECH CORP

Inventor： BULTAN AYKUT ,  GRIECO DONALD M

IPC: H04B1/707 ,  H04L7/00 ,  H04L7/02 ,  H04L25/02 ,  H04L27/06 ,  G06F17/17 ,  G06F7/38 ,  H04B1/69

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 (11) estimates an initial code phase of the received signa l. A code generator (13) generates a timing reference code that is adjustable b y integer increments. An interpolation feedback circuit (35) is configured for interpolation and correction of the timing error, whereby the interpolation (14) 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.

公开(公告)号：NO340390B1

公开(公告)日：2017-04-10

申请号：NO20072994

申请日：2007-06-12

Applicant: INTERDIGITAL TECH CORP

Inventor： OLESEN ROBERT LIND ,  KOO CHANG-SOO ,  BULTAN AYKUT ,  KWAK JAEYOUNG ,  OZLUTURK FATIH M

IPC: H04B7/02 ,  H04J99/00

公开(公告)号：AU2011265400C1

公开(公告)日：2013-08-15

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

IPC: H04J99/00 ,  H04K1/10 ,  H04L27/08

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

公开(公告)号：AR076294A2

公开(公告)日：2011-06-01

申请号：ARP100101243

申请日：2010-04-14

Applicant: INTERDIGITAL TECH CORP

Inventor： PASAD KALPENDU R ,  ZEIRA ELDAD ,  KOO CHANG-SOO ,  HUANG YUEJIN ,  OZLUTURK FATIH M ,  KWAK JAEYOUNG ,  OLESEN ROBERT L ,  BULTAN AYKUT

IPC: H04J99/00 ,  H04L1/06

Abstract: Un método para transmitir datos usando codificacion por bloques en espacio y frecuencia (SFBC) de entradas multiples/salidas multiples (MIMO), método que comprende: realizar una codificacion de canal en una corriente de datos de entrada; multiplexar la corriente de datos codificada en el menos dos corrientes de datos; obtener informacion del estado del canal (CSI); clasificar valores propios por sub-portadora; crear haces propios agrupando los mismos valores propios clasificados para todas las sub-portadoras; calcular un valor propio promedio de cada uno de los haces propios; agrupar los haces propios en pares comenzando desde un haz propio con un valor propio promedio más grande de manera que si una relacion senal-ruido (SNR) de un par es mayor que una SNR máxima, un segundo haz propio del par es reemplazado con un haz propio con el siguiente valor propio promedio más bajo siempre y cuando la SNR del par sea mayor que una SNR mínima; determinar una velocidad de datos para cada uno de los haces propios en base a la SNR del par; realizar una codificacion SFBC en las corrientes de datos con un par de haces propios; realizar una formacion de haces propios para distribuir haces propios a una pluralidad de antenas de transmision; y realizar una transformada de Fourier inversa para convertir la corriente de datos en datos en el dominio de tiempo para la transmision. También se divulga un aparato que emplea al método.

公开(公告)号：AT465553T

公开(公告)日：2010-05-15

申请号：AT04815069

申请日：2004-12-22

Applicant: INTERDIGITAL TECH CORP

Inventor： BULTAN AYKUT ,  HAIM JOHN ,  KAZAKEVICH LEONID

IPC: H04B1/16 ,  G08C17/00 ,  H04B1/00 ,  H04B1/38 ,  H04B7/005 ,  H04B7/01 ,  H04B7/015 ,  H04W52/28

Abstract: A wireless transmit/receive unit (WTRU) uses an oscillator providing accuracy for synchronized communications parameters in an active mode, and operates at reduced power during a discontinuous reception (DRX) mode. A real time clock (RTC) is used as the frequency standard during the reduced power operation, and a frequency adjustment is effected while the RTC is used as the frequency standard. By effecting the frequency adjustment, the RTC is able to be used as the frequency standard for substantial time periods, thereby reducing power consumption of the WTRU during the DRX mode.

公开(公告)号：AU2009201802A1

公开(公告)日：2009-05-28

申请号：AU2009201802

申请日：2009-05-05

Applicant: INTERDIGITAL TECH CORP

Inventor： OZLUTURK FAITH ,  BULTAN AYKUT ,  PIETRASKI PHILIP J

IPC: H04L1/02 ,  H04J99/00 ,  H04W52/42 ,  H04W88/10

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.

公开(公告)号：AU2005306875B2

公开(公告)日：2009-05-14

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

IPC: H04J99/00 ,  H04K1/10 ,  H04B7/02 ,  H04L1/02 ,  H04L27/00

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.

公开(公告)号：AR060816A2

公开(公告)日：2008-07-16

申请号：ARP070101790

申请日：2007-04-25

Applicant: INTERDIGITAL TECH CORP

Inventor： BULTAN AYKUT ,  HAIM JOHN W ,  KAZAKEVICH LEONID

IPC: H04B1/16 ,  H04B7/005 ,  H04B7/01 ,  H04B7/015 ,  H04W52/28

Abstract: Una unidad inalámbrica de transmision/recepcion (WTRU) utiliza un oscilador que provee exactitud para parámetros de comunicaciones sincronizadas en un modo activo, y opera a potencia reducida durante un modo de recepcion discontinua (DRX). Un reloj de tiempo real (RTC) es utilizado como el estándar de frecuencia durante la operacion de potencia reducida, y se efectua un ajuste de frecuencia mientras que el RTC es utilizado como el estándar de frecuencia. Al efectuar el ajuste de frecuencia, el RTC es capaz de ser utilizado como el estándar de frecuencia para períodos de tiempo sustanciales, reducido así el consumo de potencia de la WTRU durante el modo DRX.