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    81.
    发明专利
    未知

    公开(公告)号：BRPI0612088A2

    公开(公告)日：2010-10-19

    申请号：BRPI0612088

    申请日：2006-06-16

    Applicant: QUALCOMM INC

    Inventor： WALTON JAY RODNEY ,  WALLACE MARK S

    IPC: H03D1/00

    Abstract: A wireless communication network supports 802.11b/g and a range extension mode, which supports at least one data rate lower than the lowest data rate in 802.11b/g. A transmitting station (which may be an access point or a user terminal) includes first and second processors. The first processor performs differential modulation and spectral spreading for a first set of at least one data rate (e.g., 1 and 2 Mbps) supported by 802.11b/g. The second processor performs forward error correction (FEC) encoding, symbol mapping, and spectral spreading for a second set of at least one data rate (e.g., 250, 500, and 1000 Kbps) supported by the range extension mode. The transmitting station can send a transmission at a data rate supported by either 802.11b/g or the range extension mode, e.g., depending on the desired coverage range for the transmission. A receiving station performs the complementary processing to recover the transmission.

    CODING AND MODULATION FOR MULTIPLE DATA STREAMS IN A COMMUNICATION SYSTEM
    82.
    发明专利
    CODING AND MODULATION FOR MULTIPLE DATA STREAMS IN A COMMUNICATION SYSTEM 未知

    公开(公告)号：SG163511A1

    公开(公告)日：2010-08-30

    申请号：SG2010042661

    申请日：2006-06-15

    Applicant: QUALCOMM INC

    Inventor： WALTON JAY RODNEY ,  MEDVEDEV IRINA

    IPC: H04J99/00

    Abstract: Techniques for transmitting multiple data streams to a single receiver using a single code rate and different modulation schemes are described. Channel estimates are determined for the multiple data streams and used to select a single code rate and multiple modulation schemes for the multiple data streams. The system may support a set of code rates, and each code rate may be associated with a respective set of modulation schemes that may be used with that code rate. The single code rate for all data streams is selected from among the set of supported code rates, and the modulation scheme for each data stream is selected from among the set of modulation schemes associated with the single code rate. The multiple data streams are encoded in accordance with the single code rate. Each data stream is further modulated in accordance with the modulation scheme selected for that stream.

    EFFICIENT FILTER WEIGHT COMPUTATION FOR A MIMO SYSTEM
    83.
    发明专利
    EFFICIENT FILTER WEIGHT COMPUTATION FOR A MIMO SYSTEM 未知

    公开(公告)号：SG162800A1

    公开(公告)日：2010-07-29

    申请号：SG2010042638

    申请日：2006-06-07

    Applicant: QUALCOMM INC

    Inventor： HOWARD STEVEN J ,  KETCHUM JOHN W ,  WALLACE MARK S ,  MONSEN PETER ,  WALTON JAY RODNEY

    IPC: H04J99/00

    Abstract: Techniques to efficiently derive a spatial filter matrix are described. In a first scheme, a Hermitian matrix is iteratively derived based on a channel response matrix, and a matrix inversion is indirectly calculated by deriving the Hermitian matrix iteratively. The spatial filter matrix is derived based on the Hermitian matrix and the channel response matrix. In a second scheme, multiple rotations are performed to iteratively obtain first and second matrices for a pseudo-inverse matrix of the channel response matrix. The spatial filter matrix is derived based on the first and second matrices. In a third scheme, a matrix is formed based on the channel response matrix and decomposed to obtain a unitary matrix and a diagonal matrix. The spatial filter matrix is derived based on the unitary matrix, the diagonal matrix, and the channel response matrix.

    MIMO system with multiple spatial multiplexing modes
    84.
    发明专利
    MIMO system with multiple spatial multiplexing modes 未知

    公开(公告)号：AU2009200382B2

    公开(公告)日：2010-07-22

    申请号：AU2009200382

    申请日：2009-02-03

    Applicant: QUALCOMM INC

    Inventor： WALLACE MARK S ,  KETCHUM JOHN W ,  WALTON JAY RODNEY ,  HOWARD STEVEN J

    IPC: H04J99/00 ,  H04B7/005 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04L1/00 ,  H04L1/06 ,  H04L1/08 ,  H04L1/16 ,  H04L12/28 ,  H04L12/56 ,  H04L25/02 ,  H04L25/03 ,  H04L27/26

    Abstract: A MIMO system supports multiple spatial multiplexing modes for improved performance and greater flexibility. These modes may include (1) a single-user steered mode that transmits multiple data streams on orthogonal spatial channels to a single receiver, (2) a single-user non-steered mode that transmits multiple data streams from multiple antennas to a single receiver without spatial processing at a transmitter, (3) a multi-user steered mode that transmits multiple data streams simultaneously to multiple receivers with spatial processing at a transmitter, and (4) a multi-user non-steered mode that transmits multiple data streams from multiple antennas (co-located or non co-located) without spatial processing at the transmitter(s) to receiver(s) having multiple antennas.; For each set of user terminal(s) selected for data transmission on the downlink and/or uplink, a spatial multiplexing mode is selected for the user terminal set from among the multiple spatial multiplexing modes supported by the system.

    ESTRUCTURAS DE RECEPTORES PARA LA PROPAGACION ESPACIAL CON DIVERSIDAD DE TRANSMISION ESPACIO-TIEMPO O ESPACIO-FRECUENCIA.
    86.
    发明专利
    ESTRUCTURAS DE RECEPTORES PARA LA PROPAGACION ESPACIAL CON DIVERSIDAD DE TRANSMISION ESPACIO-TIEMPO O ESPACIO-FRECUENCIA. 未知

    公开(公告)号：ES2339955T3

    公开(公告)日：2010-05-27

    申请号：ES05794158

    申请日：2005-09-02

    Applicant: QUALCOMM INC

    Inventor： WALLACE MARK S ,  MEDVEDEV IRINA ,  WALTON JAY RODNEY

    IPC: H04B7/08 ,  H04J99/00 ,  H04L1/06

    Abstract: Un procedimiento para recibir datos en un sistema de comunicación inalámbrica, que comprende: obtener símbolos recibidos para una transmisión de datos que comprende por lo menos un flujo de símbolos de datos enviado con diversidad de transmisión espacio-tiempo (STTD); obtener una matriz de respuesta de canal efectiva para la transmisión de datos, en el que la matriz de respuesta de canal efectiva es el producto de la matriz que comprende los factores matriz de respuesta de canal, una matriz diagonal para la formación de haz continua para usar diferentes haces en las subbandas y una matriz de orientación para la propagación espacial para transmitir un símbolo desde antenas de transmisión múltiples simultáneamente; deducir una matriz de filtro espacial con la matriz de respuesta de canal efectiva; y llevar a cabo un procesamiento espacial en los símbolos recibidos con la matriz de filtro espacial para obtener símbolos detectados.

    DISPOSITIVO INALAMBRICO DE MULTIPLES ANTENAS DE ALTO RENDIMIENTO ENERGETICO.
    89.
    发明专利
    DISPOSITIVO INALAMBRICO DE MULTIPLES ANTENAS DE ALTO RENDIMIENTO ENERGETICO. 未知

    公开(公告)号：ES2335675T3

    公开(公告)日：2010-03-31

    申请号：ES05744347

    申请日：2005-04-29

    Applicant: QUALCOMM INC

    Inventor： WALTON JAY RODNEY ,  ANTONIO FRANKLIN P ,  WALLACE MARK S ,  NARAYAN SRIRAM

    IPC: H04B1/16 ,  H04J99/00 ,  H04B7/06 ,  H04B7/08

    Abstract: Dispositivo inalámbrico de múltiples antenas (100) que comprende: una pluralidad de (N) unidades transmisoras (120) operativamente acopladas a una pluralidad de antenas (122), una unidad transmisora (120) para cada conjunto de por lo menos una antena de entre la pluralidad de antenas (122), siendo cada unidad transmisora (120) operable para procesar una respectiva señal de entrada y proporcionar una señal de salida; una pluralidad de unidades de procesamiento (114, 116, 118, 132, 134, 136, 210, 212, 214, 216, 218, 220, 232), siendo cada unidad de procesamiento operable para llevar a cabo un procesamiento indicado para la transmisión de datos; medios (140, 230) para selectivamente e individualmente habilitar o deshabilitar por lo menos una de las N unidades transmisoras (120); y medios (140, 230) para selectivamente e individualmente habilitar o deshabilitar por lo menos una de entre la pluralidad de unidades de procesamiento (114, 116, 118, 132, 134, 136, 210, 212, 214, 216, 218, 220, 232).

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