公开(公告)号：AT429068T

公开(公告)日：2009-05-15

申请号：AT03783365

申请日：2003-11-14

Applicant: INTERDIGITAL TECH CORP

Inventor： OZLUTURK FATIH ,  KAZAKEVICH LEONID ,  HAQUE TANBIR ,  DEMIR ALPASLAN ,  NARAYAN GEETHA ,  KEARNEY KENNETH

IPC: H03D3/00 ,  H03C3/40 ,  H03G3/00 ,  H03G3/30 ,  H04B1/30 ,  H04L27/00

Abstract: In order to compensate for performance degradation caused by inferior low-cost analog radio component tolerances of an analog radio, a future system architecture (FSA) wireless communication transceiver employs numerous digital signal processing (DSP) techniques to compensate for deficiencies of such analog components so that modern specifications may be relaxed. Automatic gain control (AGC) functions are provided in the digital domain, so as to provide enhanced phase and amplitude compensation, as well as many other radio frequency (RF) parameters.

公开(公告)号：MY137877A

公开(公告)日：2009-03-31

申请号：MYPI20034368

申请日：2003-11-14

Applicant: INTERDIGITAL TECH CORP

Inventor： KAZAKEVICH LEONID ,  OZLUTURK FATIH ,  DEMIR ALPASLAN

IPC: H04B7/005 ,  H04B7/08

Abstract: A WIRELESS TRANSMIT/RECEIVE UNIT (WTRU) HAS MULTIPLE RECEIVERS WITH AN INTERFACE TO COMBINE RECEIVED SIGNALS TO PROVIDED ENHANCED RECEPTION. A CONTROL UNIT SELECTIVELY CONTROLS THE POWERING OF THE RECEIVERS TO LIMIT POWER CONSUMPTION BASED ON SELECTED PARAMETERS.

公开(公告)号：NO20072884L

公开(公告)日：2007-07-31

申请号：NO20072884

申请日：2007-06-06

Applicant: INTERDIGITAL TECH CORP

Inventor： YANG RUI ,  PIETRASKI PHILIP J ,  DEMIR ALPASLAN ,  BELURI MIHAELA

IPC: H04B7/005

Abstract: An apparatus for estimating and correcting baseband frequency error in a receiver is disclosed. An equalizer performs equalization on a sample data stream and generates filter tap values based on the equalization. An estimated frequency error signal is generated based on at least one of the filter tap values. A rotating phasor is generated based on the estimated frequency error signal. The rotating phasor signal is multiplied with the sample data stream to correct the frequency of the sample data stream. Alternatively, a channel estimator performs channel estimation and generates Rake receive finger weights based on at least one of the finger weights. An estimated frequency error signal is generated based on at least one of the finger weights.

公开(公告)号：NO20072859L

公开(公告)日：2007-06-05

申请号：NO20072859

申请日：2007-06-05

Applicant: INTERDIGITAL TECH CORP

Inventor： YANG RUI ,  PIETRASKI PHILIP J ,  STERNBERG GREGORY S ,  LI BIN ,  BELURI MIHAELA C ,  DEMIR ALPASLAN ,  PAN JUNG-LIN

IPC: H04B7/005

Abstract: An adaptive equalizer including an equalizer filter and a tap coefficients generator used to process a sample data stream derived from a plurality of received signals is disclosed. The tap coefficients generator includes an equalizer tap update unit, a vector norm square estimator, an active taps mask generator, a switch and a pilot amplitude reference unit used to minimize the dynamic range of the equalizer filter. A dynamic mask vector is used to mask active taps generated by the equalizer tap update unit when an unmasked signal output by the equalizer filter is selected by the switch to generate an error signal fed to the equalizer tap update unit. A fixed mask vector is used to mask active taps generated by the equalizer tap update unit when a masked signal output by the equalizer filter is used to generate the error signal.

公开(公告)号：AU2004253071B2

公开(公告)日：2007-05-24

申请号：AU2004253071

申请日：2004-05-06

Applicant: INTERDIGITAL TECH CORP

Inventor： KAZAKEVICH LEONID ,  DEMIR ALPASLAN ,  HAQUE TANBIR

IPC: H03G3/00 ,  H03G3/30 ,  H04B1/30 ,  H04B7/005 ,  H04L27/00 ,  H04L27/38

Abstract: A communication system including an automatic control (AGC) circuit, a receiver, an analog to digital converter (ADC) and an insertion phase variation compensation module. The AGC circuit receives and amplifies communication signals. The gain of the AGC circuit is continuously adjusted. The AGC circuit outputs an amplified signal to the receiver which, in turn, outputs an analog complex signal to the ADC. The ADC outputs a digital complex signal to an insertion phase variation compensation module which counteracts the effects of phase offsets introduced into the communication signal due to the continuous gain adjustments associated with the AGC circuit.

公开(公告)号：MX2007005453A

公开(公告)日：2007-05-21

申请号：MX2007005453

申请日：2005-11-02

Applicant: INTERDIGITAL TECH CORP

Inventor： LIN BIN ,  DEMIR ALPASLAN ,  PIETRASKI PHILIP J ,  STERNBERG GREGORY S ,  YANG RUI ,  BELURI MIHAELA ,  PAN JUNG LIN

IPC: G06F17/00 ,  H04B3/14 ,  H03H7/00 ,  H03K5/00 ,  H04B1/00

Abstract: Se describe un igualador adaptable que incluye un filtro de igualador y un generador de coeficiente de derivacion usado para procesar un flujo de datos de muestra derivado de una pluralidad de senales recibidas. El generador de coeficientes de derivacion incluye una unidad de actualizacion de derivacion de igualador, un estimador cuadratico normal vectorial, un generador de mascara de derivaciones activas, un conmutador y una unidad de referencia de amplitud piloto usada para minimizar el intervalo dinamico del filtro del igualador. Es usado un vector mascara dinamico para enmascarar las derivaciones activas generadas por la unidad de actualizacion de derivacion del igualador cuando una senal no enmascarada producida por el filtro del igualador es seleccionada por el conmutador para generar una senal de error alimentada a la unidad de actualizacion de derivacion del igualador. Se usa un vector mascara fijo para enmascarar las derivaciones activas generadas por la unidad de actualizacion de derivacion del igualador cuando una senal enmascarada producida por el filtro del igualador sea usada para generar la senal de error.

公开(公告)号：NO20065032A

公开(公告)日：2006-11-02

申请号：NO20065032

申请日：2006-11-02

Applicant: INTERDIGITAL TECH CORP

Inventor： KAZAKEVICH LEONID ,  HAQUE TANBIR ,  DEMIR ALPASLAN ,  KLAHN GERALD

IPC: H04B7/005 ,  H03C1/62 ,  H03F1/56 ,  H03G3/30 ,  H04B1/04 ,  H04B1/46 ,  H04B17/00

CPC classification number: H04B1/0458 ,  H03F1/0261 ,  H03F1/56 ,  H03F3/24 ,  H03F2200/207 ,  H03F2200/465 ,  H03G3/3042 ,  H04W52/52 ,  Y02D70/14

Abstract: A method and apparatus for dynamically adjusting the impedance between a transmitter's power amplifier (PA) and antenna to efficiently transfer power from the PA to the antenna. The impedance between the PA and the antenna is adjusted based on power level measurements and/or PA direct current (DC) consumption measurements, depending on whether the PA is a linear PA or a switch-mode PA. In another embodiment, a hybrid PA including a first stage linear PA and a second stage switch-mode PA is implemented in a transmitter. The hybrid PA selectively connects the output of the first stage linear PA to one of the input of the second stage switch-mode PA and the output of the hybrid PA, depending on the output power level of the first stage linear PA, the output power level of the hybrid PA, or a requirement indicated by a transmit power control (TPC) command.

公开(公告)号：AU2006200703A1

公开(公告)日：2006-03-09

申请号：AU2006200703

申请日：2006-02-21

Applicant: INTERDIGITAL TECH CORP

Inventor： OZLUTURK FAITH M ,  DEMIR ALPASLAN

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

公开(公告)号：NO20060061L

公开(公告)日：2006-02-09

申请号：NO20060061

申请日：2006-01-05

Applicant: INTERDIGITAL TECH CORP

Inventor： KAZAKEVICH LEONID ,  DEMIR ALPASLAN ,  NARAYAN GEETHA LAKSHMI

IPC: H04B7/005

Abstract: A method and system for adjusting the amplitude and phase characteristics of wireless communication signals generated by an analog radio transmitter, based on transmit power control (TPC) signals received by a base station (BS) and known characteristics of a power amplifier (PA) included in the transmitter. A digital pre-distortion compensation module, having real and imaginary signal paths, receives and processes real and imaginary signal components used to generate the wireless communication signal. The phase and amplitude characteristics of the wireless communication signal are controlled in response to the TPC signals, such that impaired amplitude and phase characteristics of the PA are corrected.

公开(公告)号：AR044594A1

公开(公告)日：2005-09-21

申请号：ARP040101912

申请日：2004-06-03

Applicant: INTERDIGITAL TECH CORP

Inventor： DEMIR ALPASLAN ,  KAZAKEVICH LEONID ,  HAQUE TANBIR

IPC: H03G3/30 ,  H04B1/16 ,  H04Q7/20 ,  H04Q7/22 ,  H04Q7/32

Abstract: Un sistema de comunicación que incluye un amplificador, un receptor, un conversor de análogo a digital (ADC) y un módulo de compensación de variación de fase de inserción. El amplificador recibe una señal de comunicación. Si el amplificador está habilitado, el amplificador amplifica la señal de comunicación y da salida a la señal de comunicación amplificada al receptor. Si el amplificador está deshabilitado, el amplificador pasa la señal de comunicación al receptor sin amplificarla. El receptor da salida a una señal compleja análoga al ADC. El ADC da salida a una señal compleja digital al módulo de compensación de variación de fase de inserción que contrarresta los efectos de un desplazamiento de fase introducido de manera intermitente en la señal de comunicación cuando el amplificador está habilitado o deshabilitado.