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    171.
    发明专利
    未知

    公开(公告)号：DE60326651D1

    公开(公告)日：2009-04-23

    申请号：DE60326651

    申请日：2003-10-21

    Applicant: ST MICROELECTRONICS NV

    Inventor： VANDERPERREN YVES ,  DEHAENE WIM

    IPC: H04L27/26

    Abstract: The receiver has a unit (17) for compensating a received signal with a frequency offset from a frequency offset estimation unit to form a compensated received signal where the frequency offset estimation unit includes a part for determining phase shift. A determining unit obtains a timing reference for the received signal by cross-correlation (19) of the compensated received signal with a known training sequence. Independent claims are also included for the following: (a) an orthogonal frequency division multiplex (OFDM) telecommunication system including the receiver (b) a method for processing a received signal including a carrier modulated with a known training sequence (c) a method for obtaining timing reference from a received signal including a carrier modulated with a known training sequence.

    METODO Y SISTEMA PARA CONTROLAR UN RECEPTOR EN UN SISTEMA DE COMUNICACIONES DIGITALES.
    173.
    发明专利
    METODO Y SISTEMA PARA CONTROLAR UN RECEPTOR EN UN SISTEMA DE COMUNICACIONES DIGITALES. 未知

    公开(公告)号：ES2300874T3

    公开(公告)日：2008-06-16

    申请号：ES04816122

    申请日：2004-09-15

    Applicant: CEA ETABLISSEMENT DE CARACTERE ,  ST MICROELECTRONICS NV

    Inventor： ISSON OLIVIER ,  PIERROT JEAN-BENOIT ,  LENEZ THIERRY

    IPC: H04L7/04 ,  H04J3/06 ,  H04L27/26

    Abstract: Método para controlar un receptor en un sistema de comunicaciones digitales que transmite una trama que comprende un subconjunto periódico, comprendiendo dicho método las etapas siguientes: - determinar un primer vector u a partir de una señal recibida que tiene una longitud n; - determinar un segundo vector v a partir de dicha señal recibida desplazada en un número completo de periodos; - calcular una correlación (10) entre dichos primer y segundo vectores; caracterizado porque comprende las etapas siguientes: - calcular (30) un error cuadrático entre dichos primer y segundo vectores; - calcular (40) una primera función de coste F1 que es una combinación lineal de ambos cálculos anteriores y, según el signo del resultado, - calcular (60) una segunda función de coste F2 representativa de la estimación del comienzo de la trama y determinar su valor mínimo correspondiente a un comienzo de trama; - iniciar el receptor del sistema de comunicaciones.

    175.
    发明专利
    未知

    公开(公告)号：DE60035187T2

    公开(公告)日：2008-02-14

    申请号：DE60035187

    申请日：2000-06-28

    Applicant: ST MICROELECTRONICS NV

    Inventor： ARNAUD THIERRY ,  BERENS FRIEDBERT

    IPC: H03L7/183 ,  H04B1/16 ,  H03J7/06 ,  H04B1/40 ,  H04B7/26 ,  H04L7/033

    Abstract: The electrical consumption of a cellular mobile telephone is reduced by using fractional-division phase-locked loops receiving a frequency reference from a fairly inaccurate quartz oscillator. Electrical consumption is also reduced by switching the output of the oscillator onto the input of the processing stage when the transmission/reception stage is inactive. The fractional-division phase-locked loops can then be deactivated.

    176.
    发明专利
    未知

    公开(公告)号：DE60318042D1

    公开(公告)日：2008-01-24

    申请号：DE60318042

    申请日：2003-05-19

    Applicant: ST MICROELECTRONICS NV

    Inventor： PISONI FABIO ,  HUG ROLAND ,  BONAVENTURA MARCO

    IPC: H04B3/23 ,  H04L25/03 ,  H04L27/26

    Abstract: There is disclosed a multi-carrier transceiver system for use in echo-cancellation. The transceiver system is arranged to generate from input data (1) a multi-carrier transmit signal (u) comprising a plurality of multi-carrier data blocks. The transceiver system also has a multi-carrier signal receiver responsive to an input multi-carrier receive signal (Yi) received from a remote signal transmitter. An echo canceller (2000) is arranged to generate from a pair of multi-carrier data blocks (u) a set of frequency-domain echo parameters (W) for use in generating an echo signal (Y ), to generate the echo signal using the frequency-domain echo parameters (W), and to input the echo signal (Y ) to the multi-carrier signal receiver for use in generating an echo-cancelled receive signal (Ei) from the input receive signal (Yi) and the echo signal (Y ).

    177.
    发明专利
    未知

    公开(公告)号：DE60313757T2

    公开(公告)日：2008-01-24

    申请号：DE60313757

    申请日：2003-03-04

    Applicant: ST MICROELECTRONICS NV

    Inventor： NORSWORTHY STEVEN R ,  NORSWORTHY ROSS W

    IPC: H04L27/00 ,  H04L27/04 ,  H03C1/36 ,  H03C1/46 ,  H04B1/04 ,  H04L27/36

    Abstract: A resonant power converter (220) for ultra-efficient radio frequency transmission and associated methods is disclosed. In one exemplary embodiment, the invention is digitally actuated and uses a combination of a noise-shaped encoder (222), a charging switch (224), and a high-Q resonator (204) coupled to an output load (206), typically an antenna or transmission line. Energy is built up in the electric and magnetic fields of the resonator, which, in turn, delivers power to the load (206) with very little wasted energy in the process. No active power amplifier is required. The apparatus (220) can be used in literally any RF signal application (wireless or otherwise), including for example cellular handsets, local- or wide-area network transmitters, or even radio base-stations.

    178.
    发明专利
    未知

    公开(公告)号：DE60032906T2

    公开(公告)日：2007-10-25

    申请号：DE60032906

    申请日：2000-11-07

    Applicant: ST MICROELECTRONICS NV

    Inventor： BONHOMME CORINNE

    IPC: H04L25/02 ,  H04L27/22 ,  H04B1/10 ,  H04B3/10 ,  H04B7/005 ,  H04B7/26 ,  H04L27/01

    Abstract: The procedure for estimation of the pulse response of an information transmission channel comprises an evaluation of the useful number (N2) of coefficients of the pulse response of the channel as a function of the real characteristics of the transmission channel. This includes the evaluation of a time spreading parameter (ds) for the transmission channel. The procedure for estimation of the pulse response of an information transmission channel comprises an evaluation of the useful number (N2) of coefficients of the pulse response of the channel as a function of the real characteristics of the transmission channel. A first estimation (30) of the pulse response is effected by using a predetermined maximum value for the number of coefficients of this pulse response. The evaluation of the useful number of coefficients comprises the evaluation of a time spreading parameter (ds) for the transmission channel, and the determination of a final estimation (H2) of the pulse response of the channel taking account of the useful number of coefficients.

    179.
    发明专利
    未知

    公开(公告)号：DE60313757D1

    公开(公告)日：2007-06-21

    申请号：DE60313757

    申请日：2003-03-04

    Applicant: ST MICROELECTRONICS NV

    Inventor： NORSWORTHY STEVEN R ,  NORSWORTHY ROSS W

    IPC: H04L27/00 ,  H04L27/04 ,  H03C1/36 ,  H03C1/46 ,  H04B1/04 ,  H04L27/36

    Abstract: A resonant power converter (220) for ultra-efficient radio frequency transmission and associated methods is disclosed. In one exemplary embodiment, the invention is digitally actuated and uses a combination of a noise-shaped encoder (222), a charging switch (224), and a high-Q resonator (204) coupled to an output load (206), typically an antenna or transmission line. Energy is built up in the electric and magnetic fields of the resonator, which, in turn, delivers power to the load (206) with very little wasted energy in the process. No active power amplifier is required. The apparatus (220) can be used in literally any RF signal application (wireless or otherwise), including for example cellular handsets, local- or wide-area network transmitters, or even radio base-stations.

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