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    63.
    发明专利
    未知

    公开(公告)号：AT557505T

    公开(公告)日：2012-05-15

    申请号：AT10180564

    申请日：2005-12-21

    Applicant: QUALCOMM INC

    Inventor： WANG MICHAEL MAO

    IPC: H04L27/26 ,  H04L5/00

    Abstract: The subject invention selects a starting sub-carrier frequency group for a pilot staggering sequence to facilitate in mitigating the possibility of pilot signal collisions. In one embodiment, a randomized starting sub-carrier frequency group of the pilot is utilized in a first orthogonal frequency division multiplexing (OFDM) symbol of a frame. In another embodiment, a starting pilot sub-carrier frequency group number is determined by utilizing a random number generator such as, for example, a Pseudo-Noise (PN) sequence generator, seeded by a network identification (ID) number. In this manner, the starting sub-carrier frequency group is specific to that particular network. The subj ect invention also provides a more scalable system through the trading of system bandwidth for coverage.

    64.
    发明专利
    未知

    公开(公告)号：BRPI0618058A2

    公开(公告)日：2011-08-16

    申请号：BRPI0618058

    申请日：2006-10-31

    Applicant: QUALCOMM INC

    Inventor： VRCELJ BOJAN ,  LING FUYUN ,  WANG MICHAEL MAO

    IPC: H04L27/26

    Abstract: Methods and apparatus for setting timing of sampling of one or more symbols. The disclosed methods account for at least three types of effective interference (EI) and are used to set the timing of a sampling window for sampling received symbols. The methods includes setting timing based on determining an energy density function accounting for both static and dynamic EI, determining the minimum of a total energy profile and sliding the sampling window to ensure that the minimum point is at a predetermined point, and determining and using a composite energy profile accounting for short term and long term fading effects. The disclosed apparatus include a transceiver employing one or more of the disclosed methods for setting timing when receiving the symbols.

    66.
    发明专利
    未知

    公开(公告)号：DE602006013804D1

    公开(公告)日：2010-06-02

    申请号：DE602006013804

    申请日：2006-03-08

    Applicant: QUALCOMM INC

    Inventor： WANG MICHAEL MAO ,  LING FUYUN ,  VIJAYAN RAJIV

    IPC: H04W52/02 ,  H04B1/16

    Abstract: Apparatus and methods for estimating the frequency of a sleep or slow clock by selectively utilizing an estimated sleep clock frequency and an estimated change in the sleep clock frequency. The disclosed apparatus includes a sleep clock frequency estimator to output a fast clock derived sleep clock frequency estimate and a sleep clock change frequency estimator to output an estimate of a change in frequency of the sleep clock. The apparatus further includes a combiner that weights at least one of the fast clock derived sleep clock frequency estimate to obtain a weighted sleep clock frequency estimate and the estimate of the change in frequency of the sleep clock to obtain a weighted estimate of the change in frequency of the sleep clock. The combiner also determines a new estimate of the sleep clock frequency using at least one of the weighted sleep clock frequency estimate and the weighted estimate of the change in frequency of the sleep clock. Complementary methods are also disclosed.

    69.
    发明专利
    未知

    公开(公告)号：DE602006012467D1

    公开(公告)日：2010-04-08

    申请号：DE602006012467

    申请日：2006-03-09

    Applicant: QUALCOMM INC

    Inventor： VRCELJ BOJAN ,  MANTRAVADI ASHOK ,  LING FUYUN ,  VIJAYAN RAJIV ,  WANG MICHAEL MAO

    IPC: H04L27/26

    Abstract: A method for positioning a collection window for a Fourier transform function is disclosed. A first orthogonal frequency division multiplexing (OFDM) symbol and a second OFDM symbol are received. The first OFDM symbol comprises a plurality of frequency division multiplexed (FDM) symbols. The first OFDM symbol is characterized by at least two of the following: a delay spread, a first arriving path (FAP), or a last arriving path (LAP). A channel location is estimated from a channel impulse response. A point relative to the channel location is selected. A beginning of the collection window is positioned for the second OFDM symbol at the selected point. Alternatively, a point is selected at a first location relative to the channel location using a first algorithm if a delay spread is less than a predetermined length. The selected point is chosen at a second location relative to the channel location using a second algorithm if the delay spread is greater than the predetermined length.

    METODOS Y APARATO PARA INCLUIR EN UN MARCO DE TRANSMISION LA INFORMACION DEL MODO DE COMUNICACION (TDD O FDD) PARA LA OBTENCION DEL SISTEMA.
    70.
    发明专利
    METODOS Y APARATO PARA INCLUIR EN UN MARCO DE TRANSMISION LA INFORMACION DEL MODO DE COMUNICACION (TDD O FDD) PARA LA OBTENCION DEL SISTEMA. 未知

    公开(公告)号：MX2010002704A

    公开(公告)日：2010-04-01

    申请号：MX2010002704

    申请日：2008-09-10

    Applicant: QUALCOMM INC

    Inventor： WANG MICHAEL MAO

    IPC: H04W48/08 ,  H04W56/00

    Abstract: M?todos y aparato para incluir la informaci?n sobre el modo en un marco de transmisi?n inal?mbrica, que es ?til para la obtenci?n del sistema. En particular, en un pre?mbulo de un marco de transmisi?n se proporciona un primer bit de informaci?n, donde el bit est? configurado para indicar que un sistema de comunicaci?n inal?mbrica est? funcionando de acuerdo con un modo d?plex por divisi?n de tiempo (TDD) o con un modo d?plex por divisi?n de frecuencia (FDD). La adici?n de un solo bit afecta en forma m?nima los recursos del pre?mbulo. En forma adicional, otro recurso de bit ya presente en el pre?mbulo para comunicar normalmente si las transmisiones FDD son transmisiones d?plex completas o semid?plex, puede ser adicionalmente asignado para indicar la informaci?n sobre el reparto, relacionada con las transmisiones en el modo TDD cuando el primer bit indica el modo TDD, permitiendo as? que en el marco se comunique informaci?n adicional sin aumentar los recursos del pre?mbulo.

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