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    Procedimientos y aparatos de transmisión de datos con ensanchamiento espacial en un sistema de comunicación MIMO
    1.
    发明专利
    Procedimientos y aparatos de transmisión de datos con ensanchamiento espacial en un sistema de comunicación MIMO 未知

    公开(公告)号：ES2654515T3

    公开(公告)日：2018-02-14

    申请号：ES05711350

    申请日：2005-01-11

    Applicant: QUALCOMM INC

    Inventor： WALTON JAY ,  KETCHUM JOHN ,  WALLACE MARK ,  HOWARD STEVEN

    IPC: H04B7/0417 ,  H04J99/00 ,  H04B7/04 ,  H04B7/06 ,  H04J11/00 ,  H04L1/00 ,  H04L1/02 ,  H04L1/06

    Abstract: Un procedimiento (300) de transmisión de datos desde una entidad transmisora a una entidad receptora en un sistema de comunicación inalámbrica de múltiples entradas y múltiples salidas, MIMO, que comprende: procesar (312, 314) datos para obtener una pluralidad de flujos de símbolos de datos para su transmisión en una pluralidad de canales de transmisión en un canal MIMO entre la entidad transmisora y la entidad receptora; realizar (316) el ensanchamiento espacial en la pluralidad de flujos de símbolos de datos con una pluralidad de matrices de dirección para obtener una pluralidad de flujos de símbolos ensanchados, en el que el ensanchamiento espacial comprende la transmisión del símbolo de datos en múltiples modos propios o canales espaciales del canal MIMO de forma simultánea con el vector de dirección; realizar (318) el procesamiento espacial en la pluralidad de flujos de símbolos ensanchados para la información de estado de canal completa, CSI, la transmisión en modos propios múltiples del canal MIMO o la transmisión CSI parcial en canales espaciales del canal MIMO para obtener una pluralidad de flujos de símbolos de transmisión para su transmisión desde una pluralidad de antenas transmisoras en la entidad transmisora.

    2.
    发明专利
    未知

    公开(公告)号：AT402551T

    公开(公告)日：2008-08-15

    申请号：AT03796943

    申请日：2003-12-09

    Applicant: QUALCOMM INC

    Inventor： KETCHUM JOHN ,  WALLACE MARK ,  GAAL PETER

    IPC: H04J99/00 ,  H04L25/02 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  H04L1/06 ,  H04L25/03

    Abstract: Techniques for deriving eigenvectors based on steered reference and used for spatial processing. A steered reference is a pilot transmission on one eigenmode of a MIMO channel per symbol period using a steering vector for that eigenmode. The steered reference is used to estimate both a matrix Sigma of singular values and a matrix U of left eigenvectors of a channel response matrix H . A matrix U with orthogonalized columns may be derived based on the estimates of Sigma and U, e.g., using QR factorization, minimum square error computation, or polar decomposition. The estimates of Sigma and U (or the estimate of Sigma and the matrix U) may be used for matched filtering of data transmission received via a first link. The estimate U of or the matrix U may also be used for spatial processing of data transmission on a second link (for reciprocal first and second links).

    3.
    发明专利
    未知

    公开(公告)号：AT425603T

    公开(公告)日：2009-03-15

    申请号：AT03781529

    申请日：2003-10-24

    Applicant: QUALCOMM INC

    Inventor： WALTON JAY ,  KETCHUM JOHN ,  WALLACE MARK ,  HOWARD STEVEN

    IPC: H04J99/00 ,  H04L1/00 ,  H04B7/005 ,  H04B7/04 ,  H04B7/06 ,  H04B7/08 ,  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.

    4.
    发明专利
    未知

    公开(公告)号：AT375034T

    公开(公告)日：2007-10-15

    申请号：AT03707488

    申请日：2003-01-22

    Applicant: QUALCOMM INC

    Inventor： MEDVEDEV IRINA ,  WALTON JAY ,  KETCHUM JOHN

    IPC: H04B7/005 ,  H04J99/00 ,  H04W24/00 ,  H04W52/24 ,  H04W52/26 ,  H04W52/34 ,  H04W52/50 ,  H04W72/00

    Abstract: Techniques to allocate the total transmit power to the transmission channels in a multi-channel communication system such that higher overall system spectral efficiency and/or other benefits may be achieved. The total transmit power may be initially allocated to the transmission channels based on a particular power allocation scheme (e.g., the water-filling scheme). The initial allocation may result in more power being allocated to some transmission channels than needed to achieve the required SNR (e.g., the SNR needed to achieve the maximum allowed data rate), which would then result in these transmission channels being operated in the saturation region. In such situations, the techniques reallocate the excess transmit power of transmission channels operated in the saturation region to other transmission channels operated below the saturation region. In this way, higher data rate may be achieved for the "poorer" transmission channels without sacrificing the performance of the "better" transmission channels.

    5.
    发明专利
    未知

    公开(公告)号：AT549832T

    公开(公告)日：2012-03-15

    申请号：AT04795250

    申请日：2004-10-15

    Applicant: QUALCOMM INC

    Inventor： WALTON RODNEY ,  KETCHUM JOHN ,  NANDA SANJIV

    IPC: H04L12/66 ,  H04B7/005 ,  H04L29/06

    Abstract: Techniques for MAC processing for efficient use of high throughput systems that is backward compatible with various types of legacy systems arc disclosed. In one aspect a first signal is transmitted according to a legacy transmission format to reserve a portion of a shared medium, and communication according to a second transmission format transpires during the reserved portion. In another aspect, a communication device may contend for access on a legacy system, and then communicate according to a new class communication protocol with one or more remote communication devices during the access period. In another aspect, a device may request access to a shared medium according to a legacy protocol, and, upon grant of access, the device may communicate with or facilitate communication between one or more remote stations according to a new protocol.

    6.
    发明专利
    未知

    公开(公告)号：AT521151T

    公开(公告)日：2011-09-15

    申请号：AT06719385

    申请日：2006-01-24

    Applicant: QUALCOMM INC

    Inventor： WALLACE MARK ,  KETCHUM JOHN

    IPC: H04L1/00 ,  H04J99/00

    Abstract: Techniques to parse data into multiple (M) streams with selectable data rates are described. The modulation scheme and code rate for each stream are determined based on the data rate selected for that stream. The modulation schemes and code rates for all M streams are used to determine a parse cycle and the number of puncture cycles for each stream in the parse cycle. A sequence of puncture cycles is formed for the M streams such that the puncture cycle(s) for each stream are distributed as evenly as possible across the sequence. An encoder encodes traffic data in accordance with a base code (e.g., a rate 1/2 binary convolutional code) and generates code bits. A parser then parses the code bits into the M streams based on the sequence of puncture cycles, one puncture cycle at a time and in the order indicated by the sequence.

    7.
    发明专利
    未知

    公开(公告)号：AT473617T

    公开(公告)日：2010-07-15

    申请号：AT99953000

    申请日：1999-10-01

    Applicant: QUALCOMM INC

    Inventor： WALTON JAY ,  KETCHUM JOHN ,  HOWARD STEVEN ,  WALLACE MARK

    IPC: H04L12/28 ,  H04W72/14 ,  H04B7/005 ,  H04B7/26 ,  H04W52/50

    Abstract: A method and apparatus for controlling the transmission of signals from one or more of a plurality of mobile stations (1300) to a base station (1400) on a plurality of M multiple access channels. A power control information packet formed from a plurality of power control bits is transmitted from the base station (1400) to the one or more mobile stations (1300). Each of the power control bits in the power control information packet has a position that is mapped to a selected access channel and to a time offset within the selected access channel. The power control information packet is received at a first mobile station (1300). A message is then transmitted from the first mobile station (1300) to the base station (1400) on a first access channel and at a first time offset associated with the first access channel. The message is transmitted from the first mobile station (1300) at a power level determined in response to a first power control bit in the power control information packet. The first power control bit is located in a first position in the power control information packet, the first position being mapped to the first access channel and the first time offset.

    Sistema MIMO con múltiples modos de multiplexación espacial
    8.
    发明专利
    Sistema MIMO con múltiples modos de multiplexación espacial 未知

    公开(公告)号：ES2626125T3

    公开(公告)日：2017-07-24

    申请号：ES10174919

    申请日：2003-10-24

    Applicant: QUALCOMM INC

    Inventor： WALTON JAY ,  KETCHUM JOHN ,  WALLACE MARK ,  HOWARD STEVEN

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

    Abstract: Un procedimiento (1300) de transmisión de datos en un sistema de comunicación inalámbrico de múltiples entradas y múltiples salidas, MIMO, que comprende: la codificación y la modulación (1312) de una primera pluralidad de flujos de datos para obtener una primera pluralidad de flujos de símbolos de datos; el uso de un modo de multiplexación espacial direccional, el procesamiento espacial (1314) de la primera pluralidad de flujos de símbolos de datos con una primera pluralidad de vectores de direccionamiento para obtener una primera pluralidad de flujos de símbolos de transmisión para la transmisión desde una pluralidad de antenas a un primer terminal de usuario en un primer intervalo de transmisión; la codificación y la modulación (1316) de una segunda pluralidad de flujos de datos para obtener una segunda pluralidad de flujos de símbolos de datos; y el uso de un modo de multiplexación espacial no direccional, la provisión (1318) de la segunda pluralidad de flujos de símbolos de datos como una segunda pluralidad de flujos de símbolos de transmisión para la transmisión desde la pluralidad de antenas a un segundo terminal de usuario en un segundo intervalo de transmisión.

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