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    METHOD AND APPARATUS FOR ORTHOGONAL PILOT TONE MAPPING IN MULTIPLE-IN AND MULTIPLE-OUT (MINO) AND SPATIAL DIVISION MULTIPLE ACCESS ( SDMA) SYSTEMS
    62.
    发明申请
    METHOD AND APPARATUS FOR ORTHOGONAL PILOT TONE MAPPING IN MULTIPLE-IN AND MULTIPLE-OUT (MINO) AND SPATIAL DIVISION MULTIPLE ACCESS ( SDMA) SYSTEMS 审中-公开
    用于多进多出（MINO）和空间划分多址（SDMA）系统中的正交先导音调映射的方法和设备

    公开(公告)号：WO2010093897A3

    公开(公告)日：2010-12-23

    申请号：PCT/US2010024067

    申请日：2010-02-12

    Applicant: QUALCOMM INC ,  VAN ZELST ALBERT ,  VAN NEE DIDIER JOHANNES RICHARD

    Inventor： VAN ZELST ALBERT ,  VAN NEE DIDIER JOHANNES RICHARD

    IPC: H04L5/00

    CPC classification number: H04B7/0447 ,  H04B7/0689 ,  H04L5/0048

    Abstract: Methods and apparatus for orthogonal pilot tone mapping in Multiple-In and Multiple-Out (MIMO) and Spatial Division Multiple Access (SDMA) systems are disclosed. An aspect of the method includes identifying a plurality of symbol periods within which symbols representing encoded data are to be transmitted in a plurality of spatial streams over a communication channel; identifying a plurality of pilot tone values for a plurality of pilot tones in the plurality of symbol periods to create a pilot tone mapping, wherein the identified pilot tone values are such that a receiver, when receiving at least some of the plurality of pilot tones, is provided with signals enabling the receiver to characterize and mitigate any communication impairments, and potentially obtain transmit spatial stream diversity benefits, wherein at least two of the pilot tone values in the pilot tone mapping are orthogonal when the symbols are combined over at least one dimension; and transmitting the symbols and the plurality of pilot tones over the plurality of spatial streams for the plurality of symbol periods.

    Abstract translation: 公开了用于多入多出（MIMO）和空分多址（SDMA）系统中的正交导频音调映射的方法和设备。 该方法的一个方面包括：识别多个符号周期，在该多个符号周期内，表示编码数据的符号将在通信信道上在多个空间流中传输; 识别所述多​​个符号周期中的多个导频音的多个导频音值以创建导频音映射，其中，所识别的导频音值使得接收机在接收到所述多个导频音中的至少一些时， 被提供使得接收机能够表征和减轻任何通信损伤并且潜在地获得发射空间流分集益处的信号，其中当符号在至少一个维度上被组合时，导频音调映射中的导频音调值中的至少两个是正交的 ; 以及在多个符号周期上在多个空间流上发送符号和多个导频音调。

    PILOT TONES IN A MULTI-TRANSMIT OFDM SYSTEM USABLE TO CAPTURE TRANSMITTER DIVERSITY BENEFITS
    64.
    发明公开
    PILOT TONES IN A MULTI-TRANSMIT OFDM SYSTEM USABLE TO CAPTURE TRANSMITTER DIVERSITY BENEFITS 审中-公开
    在多OFDM端系统的导频音调来获得无线电分集益处

    公开(公告)号：EP1769601A4

    公开(公告)日：2012-06-20

    申请号：EP05775616

    申请日：2005-07-22

    Applicant: QUALCOMM INC

    Inventor： VAN ZELST ALBERT ,  JONES VINCENT K

    IPC: H04J99/00 ,  H04L1/06 ,  H04B7/06 ,  H04L5/00

    CPC classification number: H04L1/0625 ,  H04B7/04 ,  H04B7/0667 ,  H04B7/10 ,  H04K1/10 ,  H04L5/0023 ,  H04L5/0048 ,  H04L5/006 ,  H04L5/0064 ,  H04L25/0204 ,  H04L25/0226 ,  H04L27/3488

    Abstract: In a wireless transmitter having a plurality of spatial streams differentiable at a receiver, wherein data is encoded and transmitted over a communication channel with pilot tones to provide the receiver with information about the effects of the communication channel and/or transmitter impairments and/or receiver impairments on the spatial streams transmitted, the benefits can be provided by identifying a plurality of symbol periods within which symbols representing some of the encoded data are to be transmitted, identifying pilot tone values for the plurality of symbol periods, wherein the identified pilot tone values are such that the receiver, when receiving at least some of the pilot tones having the identified pilot tone values, is provided with signals enabling the receiver to characterize the communication channel and/or transmitter impairments and/or receiver impairments to obtain transmit stream diversity gain, and transmitting the symbols and the pilot tones over the plurality of spatial streams for the plurality of symbol periods. In some embodiments, the pilot tones are orthogonal over space and time or over space and time and frequency, while in others they are semi-orthogonal. Pilot tone values might be of a constant amplitude and phase shifted, or might also have amplitude variations wherein at least two pilot tones are nonzero for spatial streams for a given symbol period.

    VCO RINGING CORRECTION IN PACKET SWITCHED WIRELESS NETWORKS
    66.
    发明申请
    VCO RINGING CORRECTION IN PACKET SWITCHED WIRELESS NETWORKS 审中-公开
    分组开关无线网络中的VCO振铃校正

    公开(公告)号：WO2008057728A3

    公开(公告)日：2008-07-03

    申请号：PCT/US2007081528

    申请日：2007-10-16

    Applicant: QUALCOMM INC ,  VAN ZELST ALBERT ,  VAN NEE DIDIER J RICHARD ,  JONES VINCENT KNOWLES IV ,  HALL TRACY

    Inventor： VAN ZELST ALBERT ,  VAN NEE DIDIER J RICHARD ,  JONES VINCENT KNOWLES IV ,  HALL TRACY

    IPC: H04L7/00

    CPC classification number: H04L27/0014 ,  H04L2027/0065

    Abstract: Systems and methodologies are described that facilitate mitigating ringing effects of a voltage-controlled oscillator upon turning on a transmitter. A receiver generates at least one frequency offset estimate subsequent to an antecedent frequency offset estimate that is potentially erroneous due to ringing effects. The receiver extrapolates a phase error on upcoming symbols based upon a delta between the subsequent and antecedent frequency offset estimates. The phase error is employed to correct the upcoming symbol for ringing effects. In addition, the transmitter can detect a packet in advance of being ready for transmission and power up upon detection to allow the ringing to settle.

    Abstract translation: 描述了系统和方法，其在开启发射机时有助于减轻压控振荡器的振铃效应。 接收器在由于振铃效应而潜在地错误的先前频率偏移估计之后产生至少一个频率偏移估计。 接收机基于后续和先前的频率偏移估计之间的增量来推断即将到来的符号的相位误差。 采用相位误差来校正即将到来的振铃效应符号。 此外，发送器可以在准备好传输之前检测分组，并且在检测到电源以允许振铃结束时检测分组。

    NEAR SOFT-OUTPUT MAXIMUM LIKELIHOOD DETECTION FOR MULTIPLE-INPUT MULTIPLE-OUTPUT SYSTEMS USING REDUCED LIST DETECTION
    68.
    发明申请
    NEAR SOFT-OUTPUT MAXIMUM LIKELIHOOD DETECTION FOR MULTIPLE-INPUT MULTIPLE-OUTPUT SYSTEMS USING REDUCED LIST DETECTION 审中-公开
    近似软输出使用减少列表检测的多输入多输出系统的最大似然检测

    公开(公告)号：WO2010068772A3

    公开(公告)日：2011-03-03

    申请号：PCT/US2009067522

    申请日：2009-12-10

    Applicant: QUALCOMM INC ,  VAN ZELST ALBERT

    Inventor： VAN ZELST ALBERT

    IPC: H04L25/03

    CPC classification number: H04B7/0854 ,  H04B7/0857 ,  H04L1/0002 ,  H04L1/0045 ,  H04L25/0246 ,  H04L25/0321 ,  H04L25/03318 ,  H04L25/067 ,  H04L2025/03426

    Abstract: A method and apparatus for generating soft-decision output values for a set of transmitted spatial streams in a multiple-input multiple-output (MIMO) communication system are described. The apparatus includes a processor and memory with executable instructions. A plurality of constellation points for respective transmitted spatial streams are looped over to estimate values for other transmitted streams based at least in part on Reduced List Detection (RLD). The plurality of constellation points is a subset of all possible constellation points determined around a spatial stream where more constellation points are assigned to spatial streams with a weaker signal strength than for spatial streams with a stronger signal strength. A set of distance metrics as values of the plurality of constellation points for the respective transmitted spatial streams are determined. Soft-decision outputs for the respective transmitted streams based at least in part on the set of distance metrics are generated.

    Abstract translation: 描述了用于在多输入多输出（MIMO）通信系统中生成用于一组发送的空间流的软判决输出值的方法和装置。 该装置包括具有可执行指令的处理器和存储器。 循环用于各个发送的空间流的多个星座点至少部分地基于减少列表检测（RLD）来估计其他发送的流的值。 多个星座点是围绕空间流确定的所有可能的星座点的子集，其中更多的星座点被分配给具有较强信号强度的空间流的信号强度较弱的空间流。 确定作为各个发送的空间流的多个星座点的值的一组距离度量。 至少部分地基于距离度量集合来生成针对相应发送流的软判决输出。

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