公开(公告)号：NO20052886L

公开(公告)日：2005-08-08

申请号：NO20052886

申请日：2005-06-14

Applicant: INTERDIGITAL TECH CORP

Inventor： KAZAKEVICH LEONID ,  DEMIR ALPASLAN ,  OZLUTURK FAITH

IPC: H04B7/005 ,  H04B7/08 ,  H04B1/38

Abstract: A wireless transmit/receive unit (WTRU) has multiple receivers with an interface to combine received signals to provide 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：CA2513898A1

公开(公告)日：2004-08-05

申请号：CA2513898

申请日：2004-01-23

Applicant: INTERDIGITAL TECH CORP

Inventor： GRIECO DONALD M ,  HAIM JOHN W ,  BEDNARZ ANDREW F ,  DEMIR ALPASLAN

IPC: H04L12/56 ,  H04W48/02 ,  H04W48/10 ,  H04W48/16 ,  H04W56/00 ,  H04Q7/20

Abstract: A method and system for performing initial cell search in wireless communication system wherein unsuitable cells are excluded is disclosed. Stored frequencies are searched exhaustively and initial frequencies are search non-exhaustively. Initial frequencies may be searched exhaustively in certain circumstances. When performing exhaustive initial cell searches, primary synchronization codes that lead to unsuitable cells are excluded fro m subsequent initial cell searches performed on the same frequency.

公开(公告)号：AU2003254244A1

公开(公告)日：2004-02-16

申请号：AU2003254244

申请日：2003-07-28

Applicant: INTERDIGITAL TECH CORP

Inventor： DEMIR ALPASLAN

IPC: H04B1/707 ,  H04L27/00 ,  H04L27/06 ,  H04L27/08

Abstract: A method and apparatus for use in connection with wireless communication to adjust the frequency of an oscillator to synchronize with a received signal by correlating a synchronization code channel with training sequences to estimate relative offsets which are employed to estimate an error, which is then filtered. The filtered output preferably provides a voltage controlling a voltage controlled oscillator (VCO). The same technique may be employed to control a numeric controlled oscillator (NCO).

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：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：DK1686698T3

公开(公告)日：2008-07-21

申请号：DK06111667

申请日：2002-02-04

Applicant: INTERDIGITAL TECH CORP

Inventor： DEMIR ALPASLAN ,  GRIECO DONALD M

IPC: H04B1/707 ,  H04B7/26 ,  H04J3/06 ,  H04L7/04 ,  H04W48/16

Abstract: A method and an apparatus are disclosed for establishing a communication link between a user equipment (UE) and a base station in a wireless communication network. An incoming communication signal is sampled, wherein the sampling includes generating even and odd signal samples of the communication signal, a signal strength magnitude is approximated for each of the signal samples, and the signal strength magnitudes of the signal samples are accumulated. A peak sample is then identified, wherein the peak sample is the signal sample with a highest accumulated signal strength magnitude, an index value is assigned to the peak sample, wherein the index value indicates a chip location of a primary scrambling code, and a chip offset is assigned to the index value based on the index value. A code group number and slot offset is determined based on the chip offset, the primary scrambling code is retrieved based on the code group number and slot offset, and a search frequency of a UE is adjusted based on the primary scrambling code.

公开(公告)号：AT390766T

公开(公告)日：2008-04-15

申请号：AT06111667

申请日：2002-02-04

Applicant: INTERDIGITAL TECH CORP

Inventor： DEMIR ALPASLAN ,  GRIECO DONALD

IPC: H04B1/707 ,  H04B7/26 ,  H04J3/06 ,  H04L7/04 ,  H04W48/16

Abstract: A method and an apparatus are disclosed for establishing a communication link between a user equipment (UE) and a base station in a wireless communication network. An incoming communication signal is sampled, wherein the sampling includes generating even and odd signal samples of the communication signal, a signal strength magnitude is approximated for each of the signal samples, and the signal strength magnitudes of the signal samples are accumulated. A peak sample is then identified, wherein the peak sample is the signal sample with a highest accumulated signal strength magnitude, an index value is assigned to the peak sample, wherein the index value indicates a chip location of a primary scrambling code, and a chip offset is assigned to the index value based on the index value. A code group number and slot offset is determined based on the chip offset, the primary scrambling code is retrieved based on the code group number and slot offset, and a search frequency of a UE is adjusted based on the primary scrambling code.

公开(公告)号：AU2007240245A1

公开(公告)日：2008-01-03

申请号：AU2007240245

申请日：2007-12-11

Applicant: INTERDIGITAL TECH CORP

Inventor： DEMIR ALPASLAN ,  KAZAKEVICH LEONID ,  HAQUE TANBIR

IPC: H03G3/30 ,  H04B1/16

公开(公告)号：NO20072745L

公开(公告)日：2007-08-02

申请号：NO20072745

申请日：2007-05-30

Applicant: INTERDIGITAL TECH CORP

Inventor： PIETRASKI PHILIP J ,  DEMIR ALPASLAN ,  BELURI MIHAELA

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：NO20072884A

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

CPC classification number: H04B1/7097 ,  H04B1/712 ,  H04L25/03248