公开(公告)号：DE69943301D1

公开(公告)日：2011-05-05

申请号：DE69943301

申请日：1999-12-07

Applicant: INTERDIGITAL TECH CORP

Inventor： OZLUTURK FATIH M ,  DICK STEPHEN G ,  KAZAKEVICH LEONID

IPC: H04L27/22 ,  H03C3/02 ,  H03C5/00 ,  H04L27/00 ,  H04L27/01 ,  H04L27/18

公开(公告)号：AT503330T

公开(公告)日：2011-04-15

申请号：AT04013363

申请日：1999-12-07

Applicant: INTERDIGITAL TECH CORP

Inventor： OZLUTURK FATIH M ,  DICK STEPHEN G ,  KAZAKEVICH LEONID

IPC: H04L27/22 ,  H03C3/02 ,  H03C5/00 ,  H04L27/00 ,  H04L27/01 ,  H04L27/18

Abstract: The present invention involves a system (61) for balancing a signal having I and Q components (63I, 63Q), characterized in that the system comprises: means for cross correlating (75) the I and Q components (63I, 63Q) to produce a cross correlation product (77); means for adjusting (93I, 93Q) a gain of each I and Q component (63I, 63Q) in accordance with said cross correlation product (77); and means for adding (69I, 69Q) the I component (63I) with an adjusted Q component (95I), and the Q component (63Q) with an adjusted I component (95Q) to produce a phase-balanced signal (73I, 73Q).

公开(公告)号：CA2500656C

公开(公告)日：2009-11-10

申请号：CA2500656

申请日：2003-09-30

Applicant: INTERDIGITAL TECH CORP

Inventor： KAZAKEVICH LEONID ,  CHITRAPU PRABHAKAR R ,  REDDY GAUTAM G ,  CHANDRA ARTY ,  HUNKELER TERESA

IPC: H04B7/26 ,  H04W84/00 ,  G01S5/00 ,  H04L12/28 ,  H04L12/56 ,  H04L29/02 ,  H04W4/02 ,  H04W64/00 ,  H04W84/02 ,  H04W84/12 ,  H04W84/18 ,  H04W88/02 ,  H04W88/04 ,  H04W88/06

Abstract: A wireless network provides controlled wireless communications with multi-mo de wireless WTRUs (33, 37). The wireless network has at least one base station (25) having a transceiver operating in an infrastructure communication mode withmulti mode WTRUs and a controller that transmits control signals via infrastructure communications with a WTRU that control peer-to-peer mode communications (40) of that WTRU with other WTRUs. A WTRU has transceiver components configured for selective operation in an infrastructure communication mode with a network base station and in a peer-to-peer communication mode with other WTRUs. The WTRU also has a transceiver controller configured to selectively control peer-to-peer mode communication s with other WTRUs based on communication signals received in infrastructure communications with a network base station. Preferably, the transceiver controller is configured to control the transceiver components to switch between infrastructure communication mode and peer-to-peer communication mod e based on(duality of Service criteria).

公开(公告)号：ES2324402T3

公开(公告)日：2009-08-06

申请号：ES02798558

申请日：2002-12-19

Applicant: INTERDIGITAL TECH CORP

Inventor： KEARNEY KENNETH P ,  KAZAKEVICH LEONID ,  AXNESS TIMOTHY A ,  NOLAN JAMES

IPC: H04Q7/34 ,  H04B17/00

Abstract: Método para evaluar un transmisor diseñado para el uso en un sistema de comunicación digital, caracterizado por el hecho de que comprende: a) la modelización de un transmisor (11) para proporcionar una señal de salida, que es filtrado por respuesta finita al impulso filtrada (12, 14) para empleo simultáneo en los primero y segundo canales de prueba, dicha señal de salida comprendiendo datos modulados para el uso en dichos canales; b) la introducción de al menos una degradación (15) en uno de dichos canales; y c) la medición directa (17) de ambas emisiones de dichos canales sin la necesidad de un receptor para determinar un efecto de la degradación en la salida del transmisor para ayudar en el diseño del transmisor.

公开(公告)号：ES2305526T3

公开(公告)日：2008-11-01

申请号：ES03771745

申请日：2003-07-23

Applicant: INTERDIGITAL TECH CORP

Inventor： SHAHEEN KAMEL M ,  KAZAKEVICH LEONID

IPC: H04J3/16 ,  H04L12/28 ,  H04W4/12 ,  H04W88/06 ,  H04W92/02

Abstract: Un método para comunicar mensajes desde un sistema de telecomunicaciones móvil universal, UMTS, a una estación móvil, UE, que se caracteriza porque dicha UE opera dentro de una red de área local inalámbrica, WLAN, estando la WLAN subyacente al UMTS, a) reteniendo un repetidor UMTS una identificación de usuario, ID, de la estación móvil que identifica que la estación móvil está dentro de una cobertura de servicio de la WLAN; b) transmitiendo (S4) dicho repetidor UMTS a través de un canal inalámbrico cualquier servicio UMTS dirigido al terminal móvil registrado en la WLAN; y c) convirtiendo (S5) la WLAN el mensaje de servicio en un formato de mensaje WLAN y transmitiendo (S7) el mensaje reformateado a la estación móvil.

公开(公告)号：AR062279A2

公开(公告)日：2008-10-29

申请号：ARP070103494

申请日：2007-08-08

Applicant: INTERDIGITAL TECH CORP

Inventor： KAZAKEVICH LEONID ,  HAQUE TANBIR ,  DEMIR ALPASLAN

IPC: H03G3/30 ,  H04B1/16 ,  H03G1/04

Abstract: El método para contrarrestar los efectos de un desplazamiento de fase x, introduciendo en una senal recibida, método que comprende: (a) recibir una entrada real, Re, asociada con un componente de senal en fase (I) digital; (b) recibir una entrada imaginaria, IM, asociada con un componente de senal cuadratura (O); y (c) generar un componente de senal I con una fase que es ajustada, de acuerdo con la siguiente funcion: (Cos(x) x Re)-(Sen(x) x Im). También se divulga un modulo de compensacion de variacion de fase de insercion que emplea al método, y un circuito integrado (IC) y una unidad inalámbrica de transmision/recepcion (WTRU) que comprenden al modulo de compensacion de variacion de fase de insercion

公开(公告)号：AT407476T

公开(公告)日：2008-09-15

申请号：AT06012037

申请日：2001-03-28

Applicant: INTERDIGITAL TECH CORP

Inventor： KAZAKEVICH LEONID ,  CABROL PATRICK

IPC: H03F1/02 ,  H03F3/24 ,  H03F1/06 ,  H03F1/30 ,  H03G3/30 ,  H04B7/005

Abstract: A communication signal input (20) provides a voice or data wireless signal (32) for transmission. A detector (14) removes the modulation component from the spread communication signal and provides a voltage to a voltage-to-current converter (16) controlled by a transmit power control (TPC) signal (26). An output current (30) and the output signal (38) are connected to a current mirror (18) that outputs a bias signal (34) to a radio frequency (RF) power amplifier (12). An independent claim is also included for a method of dynamically biasing an RF power amplifier.

公开(公告)号：GEP20084433B

公开(公告)日：2008-07-25

申请号：GEAP2003008774

申请日：2003-09-30

Applicant: INTERDIGITAL TECH CORP

Inventor： REDDY GAUTAM G ,  CHITRAPU PRABHAKAR R ,  KAZAKEVICH LEONID ,  HUNKELER TERESA ,  CHANDRA ARTY

IPC: H04B7/26 ,  G01S5/00 ,  H04L12/28 ,  H04L12/56 ,  H04L29/02 ,  H04W4/02 ,  H04W64/00 ,  H04W84/00 ,  H04W88/04 ,  H04W88/06

Abstract: A wireless network provides controlled wireless communications with multi-mode wireless WTRUs. The wireless network has at least one base station having a transceiver operating in an infrastructure communication mode withmulti mode WTRUs and a controller that transmits control signals via infrastructure communications with a WTRU that control peer-to-peer mode communications of that WTRU with other WTRUs.

公开(公告)号：DE602004009579T2

公开(公告)日：2008-07-24

申请号：DE602004009579

申请日：2004-05-20

Applicant: INTERDIGITAL TECH CORP

Inventor： DEMIR ALPASLAN ,  KAZAKEVICH LEONID ,  HAQUE TANBIR

IPC: H03D3/00

Abstract: A digital baseband (DBB) radio frequency (RF) receiver includes a digital high pass filter compensation (HPFC) module used to suppress group delay variation distortion caused by using low cost analog high pass filters (HPFs) in the receiver. The digital HPFC module reduces a cutoff frequency, established by the HPFs for the real and imaginary signal component frequency domain responses by providing a first compensation signal having a first predetermined value (K 1 ). The digital HPFC module adjusts the gain of the high pass response of the real and imaginary signal component frequency domains by providing a second compensation signal having a second predetermined value (K 2 ).

公开(公告)号：DE60319373D1

公开(公告)日：2008-04-10

申请号：DE60319373

申请日：2003-06-05

Applicant: INTERDIGITAL TECH CORP

Inventor： KAZAKEVICH LEONID ,  YANG RUI

IPC: H03M1/18 ,  H03G3/00 ,  H03G3/20 ,  H03G3/30 ,  H03G7/06 ,  H03M1/12 ,  H04B17/40

Abstract: An analog/digital gain control device avoid some of the requirements associated with the nature of a closed-loop AGC circuits and which meets the remaining requirements without much difficulty uses an analog to digital conversion method that increases the number of effective ADC bits by compressing the baseband input analog signal using a logarithmic circuit. After the compressed analog signal is converted into a digital signal, a digital anti-log process or look-up table (LUT) is used to expand the digital signal back to the original linear scale. The word size of the output of the anti-log process is larger than the input word size due to the nature of the anti-log function. To reduce the word size of the digital signal an open loop normalization technique can be applied.