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125 records (took 0.027 seconds)

    41.
    发明专利
    未知

    公开(公告)号：NO20060421L

    公开(公告)日：2006-03-23

    申请号：NO20060421

    申请日：2006-01-25

    Applicant: INTERDIGITAL TECH CORP

    Inventor： REZNIK ALEXANDER ,  YANG RUI ,  LI BIN ,  ZEIRA ARIELA

    IPC: H03D1/04 ,  H04B20060101 ,  H04B1/707 ,  H04L25/03

    Abstract: The present invention has many aspects. One aspect of the invention is to perform equalization using a sliding window approach. A second aspect reuses information derived for each window for use by a subsequent window. A third aspect utilizes a discrete Fourier transform based approach for the equalization. A fourth aspect relates to handling oversampling of the received signals and channel responses. A fifth aspect relates to handling multiple reception antennas. A sixth embodiment relates to handling both oversampling and multiple reception antennas.

    BUCLE DE ENGANCHE DE FASE CON ANCHO DE BANDA AJUSTABLE CONTINUAMENTE.
    44.
    发明专利
    BUCLE DE ENGANCHE DE FASE CON ANCHO DE BANDA AJUSTABLE CONTINUAMENTE. 未知

    公开(公告)号：ES2144985T3

    公开(公告)日：2005-06-16

    申请号：ES98910290

    申请日：1998-03-11

    Applicant: INTERDIGITAL TECH CORP

    Inventor： MESECHER DAVID K ,  YANG RUI ,  CERDA RAMON

    IPC: H04L27/22 ,  H04B1/707 ,  H04B1/7085 ,  H04B1/7117 ,  H04B7/216 ,  H04L27/00 ,  H04L27/233

    Abstract: UN BUCLE CERRADO DE FASE CON UN ANCHO DE BANDA AJUSTADO DE MANERA CONTINUA UTILIZADO POR UN RECEPTOR B-CDMA TM PARA CORREGIR CUALQUIER DESVIO, O DECALAJE, QUE PUDIERA OCURRIR ENTRE LA SEÑAL DE PORTADORA DE RADIOFRECUENCIA (RF) RECIBIDA Y LA FRECUENCIA DEL LO DE LA PRIMERA ETAPA QUE CONVIERTE LA SEÑAL DE PORTADORA DE RF RECIBIDA EN UNA FRECUENCIA INTERMEDIA (IF). EL PLL DEL RECEPTOR INCLUYE UN FILTRO CON UN ANCHO DE BANDA AJUSTABLE. SE UTILIZAN UN ANCHO DE BANDA MAS ANCHO DURANTE LA ADQUISICION INICIAL DE LA SEÑAL RECIBIDA. UNA VEZ QUE EL PLL HA ADQUIRIDO LA SEÑAL DE PORTADORA RECIBIDA UTILIZANDO EL ANCHO DE BANDA MAS ANCHO, EL ANCHO DE BANDA DEL FILTRO SE ESTRECHA GRADUALMENTE PARA OBTENER UN BAJO ERROR EN ESTADO ESTACIONARIO.

    45.
    发明专利
    未知

    公开(公告)号：DK0966819T3

    公开(公告)日：2005-05-23

    申请号：DK98910290

    申请日：1998-03-11

    Applicant: INTERDIGITAL TECH CORP

    Inventor： MESECHER DAVID K ,  YANG RUI ,  CERDA RAMON

    IPC: H04L27/22 ,  H04B1/707 ,  H04B1/7085 ,  H04B1/7117 ,  H04B7/216 ,  H04L27/00 ,  H04L27/233

    Abstract: A receiver for receiving a CDMA communication signal that is wirelessly transmitted includes a system for correcting phase errors in an information signal which has been transmitted. The correction system comprises circuitry for generating a mixing signal and for combining the mixing signal with said information signal to produce a correction signal. An analyzer analyzes the phase of said correction signal and generates an error signal based on the deviation of the analyzed phase from a reference phase. A bandwidth controller which recursively adjusts the phase of the correction signal such that the phase of said correction signal is substantially equal to said reference phase. The bandwidth controller then selects a bandwidth within an adjustable range based on the correction signal, estimates an offset by interrogating the error signal, and modifies said correction signal by the offset.

    REDUCED COMPLEXITY SLIDING WINDOW BASED EQUALIZER
    46.
    发明专利
    REDUCED COMPLEXITY SLIDING WINDOW BASED EQUALIZER 未知

    公开(公告)号：CA2516946A1

    公开(公告)日：2004-09-16

    申请号：CA2516946

    申请日：2004-03-02

    Applicant: INTERDIGITAL TECH CORP

    Inventor： REZNIK ALEXANDER ,  LI BIN ,  YANG RUI ,  ZEIRA ARIELA

    IPC: H04B1/38 ,  H04L25/02 ,  H04L25/03 ,  H04B1/69

    Abstract: A sliding window based data estimation is performed. An error is introduced in the data estimation due to the communication model modeling the relationship between the transmitted and received signals. To compensate for an error in the estimated data, the data that was estimated in a previous sliding window step or terms that would otherwise be truncated as noise are used. These techniques allow for the data to be truncated prior to further processing reducing the data of the window.

    Method and system for all digital gain control
    49.
    发明专利
    Method and system for all digital gain control 未知

    公开(公告)号：AU2003238924A8

    公开(公告)日：2003-12-22

    申请号：AU2003238924

    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 ,  H04B17/02

    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.

    Phase-locked loop with continuously adjustable bandwith.
    50.
    发明专利
    Phase-locked loop with continuously adjustable bandwith. 未知

    公开(公告)号：HK1024365A1

    公开(公告)日：2000-10-05

    申请号：HK00103671

    申请日：2000-06-19

    Applicant: INTERDIGITAL TECH CORP

    Inventor： MESECHER DAVID K ,  YANG RUI ,  CERDA RAMON

    IPC: H04L27/22 ,  H04B1/707 ,  H04B1/7085 ,  H04B1/7117 ,  H04B7/216 ,  H04L27/00 ,  H04L27/233 ,  H04L ,  H04B

    Abstract: A receiver for receiving a CDMA communication signal that is wirelessly transmitted includes a system for correcting phase errors in an information signal which has been transmitted. The correction system comprises circuitry for generating a mixing signal and for combining the mixing signal with said information signal to produce a correction signal. An analyzer analyzes the phase of said correction signal and generates an error signal based on the deviation of the analyzed phase from a reference phase. A bandwidth controller which recursively adjusts the phase of the correction signal such that the phase of said correction signal is substantially equal to said reference phase. The bandwidth controller then selects a bandwidth within an adjustable range based on the correction signal, estimates an offset by interrogating the error signal, and modifies said correction signal by the offset.

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