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    42.
    发明专利
    未知

    公开(公告)号：DE602006012641D1

    公开(公告)日：2010-04-15

    申请号：DE602006012641

    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.

    METODO Y APARATO PARA LA SECCION Y ADQUISICION EFICIENTE DE SISTEMAS QUE UTILIZAN OFDM O SC-FMD.
    43.
    发明专利
    METODO Y APARATO PARA LA SECCION Y ADQUISICION EFICIENTE DE SISTEMAS QUE UTILIZAN OFDM O SC-FMD. 未知

    公开(公告)号：MX2010001354A

    公开(公告)日：2010-03-10

    申请号：MX2010001354

    申请日：2008-08-04

    Applicant: QUALCOMM INC

    Inventor： COOPER ROTEM ,  KHANDEKAR AAMOD ,  WANG MICHAEL MAO ,  ANANTHARAMAN KARTHIK

    IPC: H04L27/26

    Abstract: Se describe una técnica para llevar a cabo la selección y adquisición del sistema. En un diseño, una terminal puede obtener al menos un registro de sistema para al menos un sistema que utiliza una multiplexión por división de frecuencia ortogonal (OFDM) o una multiplexión por división de frecuencia de una portadora única (SC-FDM). Cada registro del sistema puede incluir la información de la identificación del sistema para un sistema asociado y un índice para un registro de adquisición asociado. La terminal puede además obtener al menos un registro de adquisición para al menos un sistema. Cada registro de adquisición puede incluir al menos un valor para al menos un parámetro de sistema configurable, por ejemplo, tamaño de FFT, longitud de prefijo cíclico, número de subportadoras de guarda, etc. La terminal puede llevar a cabo la adquisición para al menos un sistema de acuerdo con registro de sistema y al menos un registro de adquisición. Los registros de sistema y adquisición pueden almacenarse en una lista de itinerancia preferente (PRL) o una lista utilizada más recientemente (MRU).

    44.
    发明专利
    未知

    公开(公告)号：NO20091820L

    公开(公告)日：2009-05-22

    申请号：NO20091820

    申请日：2009-05-08

    Applicant: QUALCOMM INC

    Inventor： WANG MICHAEL MAO ,  GOROKHOV ALEXEI ,  BHUSHAN NAGA ,  KHANDEKAR AAMOD

    IPC: H04L5/16 ,  H04L27/26 ,  H04W28/06 ,  H04W28/18 ,  H04W40/18

    Abstract: Superframe preamble structures for wireless communication systems are provided. The preamble can include system determination information, which can improve acquisition performance. The superframe structures can allow efficient determination of flexible parameters that determine preamble structure. The superframe structures can also facilitate quick paging capacity to scale with bandwidth.

    45.
    发明专利
    未知

    公开(公告)号：NO20091194L

    公开(公告)日：2009-04-24

    申请号：NO20091194

    申请日：2009-03-20

    Applicant: QUALCOMM INC

    Inventor： WANG MICHAEL MAO

    IPC: H04L27/26 ,  H04L27/34 ,  H04W52/42

    Abstract: Methods and apparatus for constructing a pilot symbol for a communication frame transmitted in a wireless communication system, such as an OFDM system, are disclosed. In particular, the methods and apparatus generate at least one pseudo-random noise sequence having at least a predetermined length, where the at least one pseudo-random noise sequence represents a system configuration of a wireless system. A time domain symbol sequence is modulated with the at least one pseudo-random noise sequence to create a timing acquisition pilot symbol. The modulated acquisition pilot symbol is further masked to a prescribed frequency profile and placed in a frame for wireless transmission. Accordingly, different system configurations can be communicated from a transmitter to a receiver with the acquisition pilot symbol modulated with correspondingly different pseudo-random noise sequences, while affording low complexity required to process the acquisition pilot symbol and a minimum peak to average power ratio when using QPSK modulation.

    46.
    发明专利
    未知

    公开(公告)号：NO20091195L

    公开(公告)日：2009-04-16

    申请号：NO20091195

    申请日：2009-03-20

    Applicant: QUALCOMM INC

    Inventor： WANG MICHAEL MAO

    IPC: H04L27/26 ,  H02H3/30 ,  H04L27/16

    Abstract: Method and apparatus for transmitting a wireless communication signal frame, such as an OFDM superframe. In particular, the disclosed methods and apparatus transmit a first pilot symbol in the signal frame where the symbol serves to communicate coarse timing information to a receiver. A second pilot symbol is subsequently transmitted to communicate information including network identification information concerning a wide-area network. Next, overhead information (OIS) concerning the wide-area network is then transmitted and then a third pilot symbol is transmitted to communicate information including network identification information concerning a local-area network to a receiver. By transmitting the third pilot symbol concerning the local-area network after the wide-area OIS, a receiver is allowed to acquire wide-area network timing and information and then subsequently acquire more updated local-area network timing and information and more efficiently utilize processing resources.

    48.
    发明专利
    未知

    公开(公告)号：NO20085246L

    公开(公告)日：2009-03-10

    申请号：NO20085246

    申请日：2008-12-15

    Applicant: QUALCOMM INC

    Inventor： WANG MICHAEL MAO

    IPC: H04L27/28 ,  G08C15/06 ,  H04Q11/04 ,  H04W36/30 ,  H04W36/36 ,  H04W52/14

    Abstract: Techniques for sending sector/system information in TDM pilots using a hierarchical pilot structure are described. A base station sends multiple sets of bits for the sector/system information in multiple TDM pilots. The set of bits sent in a given TDM pilot may include bits sent in earlier TDM pilots. In one design, the base station generates a first TDM pilot based on a first set of bits, generates a second TDM pilot based on a second set of bits that includes the first set, generates a third TDM pilot based on all bits for the information, and sends the TDM pilots. A terminal performs detection to obtain a first detected value for the first TDM pilot, performs detection based on the first detected value to obtain a second detected value for the second TDM pilot, and performs detection based on the first and second detected values to obtain a third detected value for the third TDM pilot.

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