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    EQUALIZATION OF MULTIPLE SIGNALS RECEIVED FOR SOFT HANDOFF IN WIRELESS COMMUNICATION SYSTEMS
    32.
    发明专利
    EQUALIZATION OF MULTIPLE SIGNALS RECEIVED FOR SOFT HANDOFF IN WIRELESS COMMUNICATION SYSTEMS 未知

    公开(公告)号：CA2517008A1

    公开(公告)日：2004-09-10

    申请号：CA2517008

    申请日：2004-02-23

    Applicant: QUALCOMM INC

    Inventor： FERNANDEZ-CORBATON IVAN JESUS ,  SMEE JOHN E ,  JAYARAMAN SRIKANT

    IPC: H04B7/005 ,  H04B7/02 ,  H04L25/03

    Abstract: Techniques for performing equalization of multiple signals received by a terminal in soft handoff with multiple base stations. The received signal at the terminal is conditioned and digitized to provide a stream of received samples (y m ), which is then equalized/filtered (410) with multiple sets of coefficients to provide multiple streams of transmit chip estimates (X k ). One set of coefficients (f k ) is provided for each base station and is used to provide a corresponding stream of transmit chip estimates. The multiple streams of transmit chip estimates are further processed (420) to provide multiple streams of data symbol estimates (d k ), one stream of data symbol estimates for each base station. The multiple streams of data symbol estimates are then scaled (430) with multiple scaling factors (± k ) and combined (432) to provide a stream of combined data symbol estimates (d k ). The processing for the multiple base stations may be performed by a single hardware unit in a time division multiplexed manner.

    NON-PARAMETRIC MATCHED FILTER RECEIVER FOR WIRELESS COMMUNICATION SYSTEMS
    33.
    发明专利
    NON-PARAMETRIC MATCHED FILTER RECEIVER FOR WIRELESS COMMUNICATION SYSTEMS 未知

    公开(公告)号：AU2003256622A1

    公开(公告)日：2004-02-16

    申请号：AU2003256622

    申请日：2003-07-18

    Applicant: QUALCOMM INC

    Inventor： FERNANDEZ-CORBATON IVAN JESUS ,  SMEE JOHN E ,  JAYARAMAN SRIKANT

    IPC: H04B1/707 ,  H04L25/02 ,  H04L25/03

    Abstract: A non-parametric matched filter receiver that includes a digital (e.g., FIR) filter and a channel estimator. The channel estimator (1) determines the timing to center the digital filter, (2) obtains the characteristics of the noise in received samples, (3) estimates the system response for the samples using a best linear unbiased (BLU) estimator, a correlating estimator, or some other type of estimator, and (4) derives a set of coefficients for the digital filter based on the estimated system response and the determined noise characteristics. The correlating estimator correlates the samples with their known values to obtain the estimated system response. The BLU estimator pre-processes the samples to whiten the noise, correlates the whitened samples with their known values, and applies a correction factor to obtain the estimated system response. The digital filter then filters the samples with the set of coefficients to provide demodulated symbols.

    RECEIVER WITH SELECTION BETWEEN A DECISION FEEDBACK EQUALIZER AND A LINEAR EQUALIZER
    34.
    发明专利
    RECEIVER WITH SELECTION BETWEEN A DECISION FEEDBACK EQUALIZER AND A LINEAR EQUALIZER 未知

    公开(公告)号：AU2003259030A1

    公开(公告)日：2003-12-19

    申请号：AU2003259030

    申请日：2003-06-04

    Applicant: QUALCOMM INC

    Inventor： SMEE JOHN ,  FERNANDEZ-CORBATON IVAN JESUS ,  JAYARAMAN SRIKANT

    IPC: H04L27/01 ,  H04B3/06 ,  H04B7/005 ,  H04L1/00 ,  H04L1/18 ,  H04L1/20 ,  H04L25/03

    Abstract: Techniques for selecting either a DFE or an LE for use to equalize a received signal, and for quickly and efficiently determining the coefficients for the selected equalizer. In an embodiment, a method is provided whereby the DFE is initially adapted based on the received signal and a particular adaptive algorithm (e.g., the LMS algorithm) for an initial time period. A quality metric is then determined for an output of the DFE. The DFE is selected for use if the quality metric is better than a threshold value, and the LE is selected otherwise. If the LE is selected, then the initial values for the coefficients of the LE may be derived based on the coefficients of a feed-forward filter and a feedback filter for the DFE, and the LE coefficients may further be adapted for an additional time period prior to its use to equalize the received signal.

    Detección MIMO con cancelación de interferencia de componentes de señal temporizadas
    36.
    发明专利
    Detección MIMO con cancelación de interferencia de componentes de señal temporizadas 未知

    公开(公告)号：ES2774150T3

    公开(公告)日：2020-07-17

    申请号：ES07844883

    申请日：2007-11-05

    Applicant: QUALCOMM INC

    Inventor： FERNANDEZ-CORBATON IVAN JESUS ,  BLANZ JOSEF J ,  JOETTEN CHRISTOP ARNOLD

    IPC: H04L25/02 ,  H04B1/7107 ,  H04B7/04 ,  H04L25/03

    Abstract: Un procedimiento (700) de comunicación, que comprende: obtener (712) datos recibidos para una transmisión de múltiples entradas y múltiples salidas, MIMO; procesar (714) los datos recibidos en base a un filtro de sección de entrada (410) para obtener datos filtrados; procesar (716) los datos filtrados en base a, al menos, una primera matriz de combinación para obtener datos detectados para una primera trama, en el que una matriz de combinación combina componentes de señal temporizadas en los datos filtrados para un código de canalización para obtener datos detectados para el código de canalización, en el que las componentes de señal temporizadas son componentes de señal que hacen referencia a un símbolo deseado que va a ser recuperado, así como a otros símbolos transmitidos al mismo tiempo que el símbolo deseado; procesar (718) los datos detectados para la primera trama para obtener datos descodificados para la primera trama; determinar si la primera trama está descodificada correctamente; y procesar (720) los datos filtrados en base a, al menos, una segunda matriz de combinación y datos descodificados para la primera trama cuando la primera trama está descodificada correctamente para cancelar interferencia debida a la primera trama y obtener datos detectados para una segunda trama; y en el que el procesamiento de los datos filtrados en base a la al menos una segunda matriz de combinación comprende estimar la interferencia solamente debida a las componentes de señal temporizadas de la primera trama, y cancelar la interferencia de los datos filtrados.

    CQI REPORTING FOR MIMO TRANSMISSION IN A WIRELESS COMMUNICATION SYSTEM
    37.
    发明专利
    CQI REPORTING FOR MIMO TRANSMISSION IN A WIRELESS COMMUNICATION SYSTEM 未知

    公开(公告)号：CA2902072C

    公开(公告)日：2018-01-09

    申请号：CA2902072

    申请日：2008-01-08

    Applicant: QUALCOMM INC

    Inventor： BLANZ JOSEF J ,  FERNANDEZ-CORBATON IVAN JESUS

    IPC: H04W24/00 ,  H04B17/336

    Abstract: Techniques for determining and reporting channel quality indicator (CQI) information are described. A user equipment (UE) may determine a transmit power per channelization code, POVSF, based on the available transmit power and a designated number of channelization codes, e.g., by uniformly distributing the available transmit power across all transport blocks and all of the designated number of channelization codes. The UE may estimate SINRs of multiple transport blocks based on POVSF, determine CQI indices for the transport blocks based on the SINRs, and send the CQI indices to a Node B. The Node B may send multiple transport blocks to the UE based on the CQI indices. The Node B may send the transport blocks (i) with the designated number of channelization codes at POVSF or (ii) with a second number of channelization codes at POVSF, with the transport block sizes being scaled based on the designated and second numbers of channelization codes.

    CQI REPORTING FOR MIMO TRANSMISSION IN A WIRELESS COMMUNICATION SYSTEM
    40.
    发明专利
    CQI REPORTING FOR MIMO TRANSMISSION IN A WIRELESS COMMUNICATION SYSTEM 未知

    公开(公告)号：CA2673889C

    公开(公告)日：2015-11-24

    申请号：CA2673889

    申请日：2008-01-08

    Applicant: QUALCOMM INC

    Inventor： BLANZ JOSEF J ,  FERNANDEZ-CORBATON IVAN JESUS

    IPC: H04B7/005 ,  H04B7/04 ,  H04L1/00

    Abstract: Techniques for determining and reporting channel quality indicator (CQI) information are described. A user equipment (UE) may determine a transmit power per channelization code, POVSF, based on the available transmit power and a designated number of channelization codes, e.g., by uniformly distributing the available transmit power across all transport blocks and all of the designated number of channelization codes. The UE may estimate SINRs of multiple transport blocks based on POVSF, determine CQI indices for the transport blocks based on the SINRs, and send the CQI indices to a Node B. The Node B may send multiple transport blocks to the UE based on the CQI indices. The Node B may send the transport blocks (i) with the designated number of channelization codes at POVSF or (ii) with a second number of channelization codes at POVSF, with the transport block sizes being scaled based on the designated and second numbers of channelization codes.

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