公开(公告)号：BRPI0415785A

公开(公告)日：2007-03-06

申请号：BRPI0415785

申请日：2004-11-18

Applicant: INTERDIGITAL TECH CORP

Inventor： RUDOLF MARIAN ,  DICK STEPHEN G ,  PIETRASKI PHILIP J

IPC: H04W72/04 ,  H04B20060101 ,  H04B7/00 ,  H04B7/26 ,  H04L29/00 ,  H04W72/14 ,  H04Q7/00

Abstract: A method and wireless communication system for providing channel assignment information used to support an uplink (UL) channel and a downlink (DL) channel. The system includes at least one Node-B and at least one wireless transmit/receive unit (WTRU). The WTRU communicates with the Node-B via a common control channel, the UL channel and the DL channel. The WTRU receives a message from the Node-B via the common control channel. The message includes an indication of whether the message is intended for assigning radio resources to the UL channel or the DL channel. The WTRU determines whether the message is intended for the WTRU and, if so, the WTRU determines whether the message is for assigning radio resources to the UL channel or the DL channel. The WTRU takes an appropriate action based on whether the message is for assigning radio resources to the UL channel or the DL channel.

公开(公告)号：CA2601362A1

公开(公告)日：2006-09-28

申请号：CA2601362

申请日：2006-03-06

Applicant: INTERDIGITAL TECH CORP

Inventor： PIETRASKI PHILIP J ,  YANG RUI ,  BELURI MIHAELA ,  CHINCHOLI AMITH VIKRAM ,  KEARNEY KENNETH P

IPC: H04B1/707

Abstract: A method and apparatus for compensating for phase noise of symbols spread with a long spreading code are disclosed. To compensate for the phase noise, a phase error estimate is generated from despread symbols with a short spreading code. A phase correcting phasor is applied to chip rate data before despreading the data with a long spreading code. A signal-to-interference ratio (SIR) on a common pilot channel (CPICH) may be calculated by spreading the data with a parent spreading code in an orthogonal variable spreading factor (OVSF) code tree and by combining symbols. Alternatively, a magnitude of the symbols may be used in estimating the SIR. The SIR of a channel using a short spreading code and an SIR of a channel using a long spreading code are measured. The SIR of the channel with the long spreading code may be compensated in accordance with a difference between degradation of the SIRs.

公开(公告)号：NO20062435A

公开(公告)日：2006-08-02

申请号：NO20062435

申请日：2006-05-29

Applicant: INTERDIGITAL TECH CORP

Inventor： STERNBERG GREGORY S ,  YANG RUI ,  LI BIN ,  PIETRASKI PHILIP J

IPC: H04L25/02 ,  H04L1/00 ,  H04L1/20 ,  H04L12/66 ,  H04Q7/28

CPC classification number: H04L1/0026 ,  H04L1/20 ,  H04L25/0202

公开(公告)号：CA2589756A1

公开(公告)日：2006-06-15

申请号：CA2589756

申请日：2005-11-30

Applicant: INTERDIGITAL TECH CORP

Inventor： PIETRASKI PHILIP J

IPC: H04B1/69 ,  H04B1/707 ,  H04B1/713

Abstract: A channel estimation apparatus and method is provided for a wireless communication signal received from at least one relatively mobile wireless transmit/receive unit (WTRU). Predetermined filter coefficients having unique index values are stored in a memory device. An index generator matches estimation values of the mobile unit speed and SNR to a particular filter coefficient, and selects a corresponding index value, whereby the memory performs a look up function according to the index value and outputs a filter coefficient vector. The channel estimation of the wireless communication signal is taken from the output of the filter. Alternatively, a set of parallel filters which run continuously are used to produce several channel estimates, from which the final estimate is selected based on the associated lowest mean square error or highest SNR.

公开(公告)号：NO20061560L

公开(公告)日：2006-06-09

申请号：NO20061560

申请日：2006-04-06

Applicant: INTERDIGITAL TECH CORP

Inventor： LI BIN ,  PIETRASKI PHILIP J ,  STERNBERG GREGORY S

IPC: H04L1/20 ,  H04L27/38

Abstract: A method and apparatus for estimating attributes of a received signal that includes a plurality of transmitted signals are provided. The amplitude of the received signal is estimated by performing a method of demodulation based on known signal information. The amplitude of an M-ary quadrature amplitude modulated signal is estimated based upon known or ascertainable phase information regarding a plurality of transmitted symbols. The amplitude of a q-ary amplitude shift keyeing signal is estimated based upon known or ascertainable magnitude information regarding a plurality of transmitted symbols. Statistical information is also used for amplitude estimation.

公开(公告)号：NO20061560A

公开(公告)日：2006-06-09

申请号：NO20061560

申请日：2006-04-06

Applicant: INTERDIGITAL TECH CORP

Inventor： LI BIN ,  PIETRASKI PHILIP J ,  STERNBERG GREGORY S

IPC: H04L1/20 ,  H04L27/38

CPC classification number: H04L27/38 ,  H04L1/20

公开(公告)号：CA2586703A1

公开(公告)日：2006-05-18

申请号：CA2586703

申请日：2005-10-20

Applicant: INTERDIGITAL TECH CORP

Inventor： PIETRASKI PHILIP J ,  DEMIR ALPASLAN ,  BELURI MIHAELA C

IPC: H03H7/30

Abstract: A step-size estimator for controlling the step-size of an adaptive equalizer incorporated in a transceiver, (e.g., a wireless transmit/receive unit (WTRU)). The step-size estimator updates at least one adaptive equalizer tap used by the adaptive equalizer based on an apparent speed of a channel established between the transceiver and another transceiver. The step-size estimator includes a speed estimator, a signal-to-noise ratio (SNR) averager and a step-size mapping unit. The speed estimator is used to estimate the apparent speed of the channel, (i.e., the observed and/or measured rate of change of the channel impulse response). The SNR averager generates a common pilot channel (CPICH) SNR estimate. The step-size mapping unit uses the speed estimate and the CPICH SNR estimate to generate a step-size parameter, µ, and a filter taps leakage factor parameter, ±, used by the adaptive equalizer to update the filter tap coefficient.

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

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

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：AR046830A1

公开(公告)日：2005-12-28

申请号：ARP040104064

申请日：2004-11-05

Applicant: INTERDIGITAL TECH CORP

Inventor： PIETRASKI PHILIP J ,  STERNBERG GREGORY S ,  YANG RUI ,  LI BIN

IPC: H04L1/00 ,  H04L1/20 ,  H04L25/02 ,  H04Q7/34

Abstract: Un método y aparato para estimar e informar la calidad de un canal de comunicación inalámbrica entre una unidad inalámbrica de transmisión/recepción (WTRU) y un Nodo B. Una senal modulada es recibida desde el Nodo B a través del canal de comunicación y se lleva a cabo una estimación de canal en la senal modulada para proveer un estimado de canal. en una forma de realización, la senal modulada es demodulada en base al estimado de canal para proveer una senal demodulada y se obtiene un estimado de relación entre senal e interferencia (SIR) en base a la senal demodulada. La calidad del canal de comunicación es estimada en base al menos al estimado de SIR. En una forma de realización alternativa, se obtiene un estimado de SIR en base al estimado de canal. La calidad del canal de comunicación es estimada en base al estimado de SIR y a información adicional que incluye al menos uno entre información de velocidad de WTRU, distorsión de retardo y potencia de transmisión.

公开(公告)号：AR046455A1

公开(公告)日：2005-12-07

申请号：ARP040104250

申请日：2004-11-18

Applicant: INTERDIGITAL TECH CORP

Inventor： RUDOLF MARIAN ,  DICK STEPHEN G ,  PIETRASKI PHILIP J

IPC: H04W72/04 ,  H04B20060101 ,  H04B7/00 ,  H04B7/26 ,  H04L29/00 ,  H04W72/14 ,  H04Q7/28

Abstract: Un método y sistema de comunicación inalámbrica para proveer información de asignación de canal para soportar un canal de enlace ascendente (UL) y un canal de enlace descendente (DL). El sistema incluye al menos un Nodo B y al menos una unidad inalámbrica de transmisión/recepción (WTRU). La WTRU se comunica con el Nodo B a través de un canal de control común, el canal UL y el canal DL. La WTRU recibe un mensaje desde el Nodo B a través del canal de control común. El mensaje incluye una indicación respecto de si el mensaje está destinado a asignar recursos de radio al canal UL o al canal DL. La WTRU determina si el mensaje está destinado a la WTRU y, si así fuera, la WTRU determina si el mensaje es para asignar recursos de radio al canal UL o al canal DL. La WTRU efectúa una ación apropiada en base a si el mensaje es para asignar recursos de radio al canal UL o al canal DL.