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公开(公告)号:CA2615613A1
公开(公告)日:2007-02-08
申请号:CA2615613
申请日:2006-07-17
Applicant: INTERDIGITAL TECH CORP
Inventor: KEARNEY KENNETH P , BULTAN AYKUT , YANG RUI , PAN KYLE JUNG-LIN
IPC: H04B1/00
Abstract: A method and apparatus for automatically correcting the frequency of a local oscillator of a receiver. A primary common pilot channel (CPICH) code sequence is generated by a CPICH code generator based on a reference cell identification signal and a frame start signal. The received despread CPICH code sequence is used to generate an estimated frequency error signal. A control voltage signal is generated by a control voltage generator based on the estimated frequency error signal. The CPICH code generator generates the CPICH code sequence based on signals received from a high speed downlink packet access (HSDPA) serving cell when HSDPA is active, or a timing reference cell when HSDPA is not active. The present invention achieves full maximum ratio combining gain when space time transmit diversity (STTD) is used, even without receiving a transmit diversity indication.
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公开(公告)号:NO20062621L
公开(公告)日:2006-08-03
申请号:NO20062621
申请日:2006-06-07
Applicant: INTERDIGITAL TECH CORP
Inventor: GRIECO DONALD M , PAN JUNG-LIN , BULTAN AYKUT , DENNEAN CHARLES
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公开(公告)号:ES2250650T3
公开(公告)日:2006-04-16
申请号:ES02731342
申请日:2002-04-15
Applicant: INTERDIGITAL TECH CORP
Inventor: BULTAN AYKUT , GRIECO DONALD
IPC: H04B1/7085 , H04B1/709 , H04L7/02 , H04B1/707
Abstract: Un sistema de comunicaciones de acceso múltiple con división de código, que incluye una pluralidad de estaciones de comunicación, comprendiendo al menos una estación un receptor para recibir una señal de comunicación desde otra estación, en que dicha señal de comunicación es correlacionada por dicho receptor usando un bucle de seguimiento de código de bloqueo del retardo (10) para estimar y seguir un retardo de canal de dicha comunicación, el bucle de seguimiento de código de bloqueo del retardo (10) comprende: un generador de código de referencia (16) para generar una señal de código de referencia; un interpolador (11) para generar una versión de base de la señal de comunicación recibida y una pluralidad de versiones de la misma desplazadas en el tiempo; un correlacionador de señal temporizada para correlacionar cada una de dichas versiones de señal desplazadas en el tiempo con dicha señal de código de referencia y combinar las correlaciones para generar una señal d error (e(t)); un circuito de normalización de potencia automática (20) para generar una señal de error de potencia (Pe) basada en la versión de la señal de base y en la señal de código de referencia; y un circuito de normalización (14) para normalizar dicha señal de error (e(t)) usando dicha señal de error de potencia (Pe) para generar una señal de error normalizada usada para controlar la generación de la versión de señal de base mediante el interpolador (11).
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公开(公告)号:AU2005274106A1
公开(公告)日:2006-02-23
申请号:AU2005274106
申请日:2005-07-29
Applicant: INTERDIGITAL TECH CORP
Inventor: BULTAN AYKUT , OZLUTURK FATIH , PIETRASKI PHILIP J
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:AR046981A1
公开(公告)日:2006-01-04
申请号:ARP040104841
申请日:2004-12-22
Applicant: INTERDIGITAL TECH CORP
Inventor: BULTAN AYKUT , HAIM JOHN W , KAZAKEVICH LEONID
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 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, reduciendo así el consumo de potencia de la WTRU durante el modo DRX.
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公开(公告)号:CA2550221A1
公开(公告)日:2005-07-14
申请号:CA2550221
申请日:2004-12-22
Applicant: INTERDIGITAL TECH CORP
Inventor: KAZAKEVICH LEONID , HAIM JOHN W , BULTAN AYKUT
IPC: H02J7/00 , G06F1/04 , G06F1/32 , H03B28/00 , H03K5/00 , H04B1/16 , H04B7/005 , H04B7/01 , H04B7/015 , H04W52/28
Abstract: A wireless transmit/receive unit (WTRU) uses an oscillator providing accurac y for synchronized communications parameters in an active mode, and operates a t 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 frequenc y 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.
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公开(公告)号:NO20052000L
公开(公告)日:2005-06-22
申请号:NO20052000
申请日:2005-04-25
Applicant: INTERDIGITAL TECH CORP
Inventor: GRIECO DONALD M , BULTAN AYKUT
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:NO20041632A
公开(公告)日:2004-04-21
申请号:NO20041632
申请日:2004-04-21
Applicant: INTERDIGITAL TECH CORP
Inventor: GRIECO DONALD M , BULTAN AYKUT
CPC classification number: H04B1/7085 , H04B1/709 , H04L7/0029
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公开(公告)号:CA2462504A1
公开(公告)日:2003-04-10
申请号:CA2462504
申请日:2002-04-15
Applicant: INTERDIGITAL TECH CORP
Inventor: BULTAN AYKUT , GRIECO DONALD
IPC: H04B1/7085 , H04B1/709 , H04L7/02 , H04B1/707
Abstract: The UE is in communication with one of the plurality of base stations and receives a communication signal from the base station through the CDMA receiver. The communication signal is correlated by said receiver using a delay locked code tracking loop (10), that estimates and tracks a channel delay of the communication signal. The tracking loop comprises a reference code generator (16) for generating a reference code signal and an interpolat or (11) for generating timed signal versions in response to the receipt of said communication. A timed signal correlator (12a, 12b, 13a; 13b), also included in the tracking loop for correlating at least two of the timed signal versio ns with the code reference signal. The result of the correlation is used for generating an error signal. An automatic power normalization loop (APN), tha t is responsive to the interpolator (11), generates a power error signal that normalizes the error signal through a normalization circuit (14).
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公开(公告)号:NO339219B1
公开(公告)日:2016-11-14
申请号:NO20071317
申请日:2007-03-12
Applicant: INTERDIGITAL TECH CORP
Inventor: OLESEN ROBERT LIND , KOO CHANG-SOO , BULTAN AYKUT , HUANG YUEJIN , OZLUTURK FATIH , ZEIRA ELDAD , KWAK JAEYOUNG , PASAD KALPENDU R
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