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    ENHANCED GERAN RECEIVER USING CHANNEL INPUT BEAMFORMING
    1.
    发明专利
    ENHANCED GERAN RECEIVER USING CHANNEL INPUT BEAMFORMING 未知

    公开(公告)号：CA2730657A1

    公开(公告)日：2010-02-23

    申请号：CA2730657

    申请日：2009-08-15

    Applicant: QUALCOMM INC

    Inventor： SIKRI DIVAYDEEP ,  ABRISHAMKAR FARROKH ,  MCCLOUD MICHAEL L

    IPC: H04L25/03 ,  H04L7/04

    Abstract: A method for suppressing interference in a wireless communication is provided. The method comprises receiving a burst of symbols, generating a plurality of timing hypotheses for the burst of symbols, and calculating, for each timing hypothesis, a plurality of weights for an interference suppression filter based upon a subset of the burst of symbols. The method further comprises, for each timing hypothesis, filtering the subset of the burst of symbols using the interference suppression filter with the corresponding plurality of weights, and selecting one of the plurality of timing hypotheses corresponding to a selection criteria. The method further comprises equalizing and decoding the filtered burst of symbols based upon the selected one of the plurality of timing hypotheses.

    2.
    发明专利
    未知

    公开(公告)号：AT547877T

    公开(公告)日：2012-03-15

    申请号：AT09791549

    申请日：2009-08-15

    Applicant: QUALCOMM INC

    Inventor： SIKRI DIVAYDEEP ,  ABRISHAMKAR FARROKH ,  MCCLOUD MICHAEL L

    IPC: H04L25/03 ,  H04L7/04

    Abstract: A method for suppressing interference in a wireless communication is provided. The method comprises receiving a burst of symbols, generating a plurality of timing hypotheses for the burst of symbols, and calculating, for each timing hypothesis, a plurality of weights for an interference suppression filter based upon a subset of the burst of symbols. The method further comprises, for each timing hypothesis, filtering the subset of the burst of symbols using the interference suppression filter with the corresponding plurality of weights, and selecting one of the plurality of timing hypotheses corresponding to a selection criteria. The method further comprises equalizing and decoding the filtered burst of symbols based upon the selected one of the plurality of timing hypotheses.

    METHODS AND APPARATUSES FOR FLASH WCDMA FREQUENCY SCANS
    4.
    发明申请
    METHODS AND APPARATUSES FOR FLASH WCDMA FREQUENCY SCANS 审中-公开
    用于闪存WCDMA频率扫描的方法和装置

    公开(公告)号：WO2014004408A3

    公开(公告)日：2014-04-17

    申请号：PCT/US2013047427

    申请日：2013-06-24

    Applicant: QUALCOMM INC

    Inventor： ANAND RAGHAVENDRA SHYAM ,  MCCLOUD MICHAEL L

    IPC: H04W48/08 ,  H04B7/26

    CPC classification number: H04W16/14 ,  H04W48/08

    Abstract: A method and apparatus of wireless communication are configured to capture, at a user equipment, one or more adjacent Universal Mobile Telecommunication System Terrestrial Radio Access Absolute Radio Frequency Channel Numbers (UARFCNs), extract a useful wide band signal from the one or more adjacent UARFCNs, perform a PSCH search on the useful wide band signal to obtain a composite PSCH signal, and reject the one or more UARFCNs where no peaks greater than a noise threshold are detected in the composite PSCH signal.

    Abstract translation: 无线通信的方法和装置被配置为在用户设备处捕获一个或多个相邻的通用移动电信系统陆地无线电接入绝对射频信道号码（UARFCN），从一个或多个相邻的UARFCN提取有用的宽带信号 对有用的宽带信号执行PSCH搜索以获得复合PSCH信号，并且拒绝在复合PSCH信号中检测不到大于噪声阈值的峰值的一个或多个UARFCN。

    TIME TRACKING LOOPS FOR A MULTICARRIER COMMUNICATION SYSTEM UTILIZING A CYCLIC PREFIX
    6.
    发明申请
    TIME TRACKING LOOPS FOR A MULTICARRIER COMMUNICATION SYSTEM UTILIZING A CYCLIC PREFIX 审中-公开
    使用循环前缀的多媒体通信系统的时间跟踪

    公开(公告)号：WO2011002932A3

    公开(公告)日：2011-03-24

    申请号：PCT/US2010040671

    申请日：2010-06-30

    Applicant: QUALCOMM INC ,  SRINIVASAN SHIVRATNA G ,  MCCLOUD MICHAEL L ,  BREHLER MATTHIAS ,  BANISTER BRIAN C

    Inventor： SRINIVASAN SHIVRATNA G ,  MCCLOUD MICHAEL L ,  BREHLER MATTHIAS ,  BANISTER BRIAN C

    IPC: H04L27/26 ,  H04L25/02

    CPC classification number: H04L27/2662 ,  H04L25/0212 ,  H04L27/2665

    Abstract: Techniques for performing time tracking in a communication system utilizing a cyclic prefix are described. In an aspect, a receiver may perform time tracking and determine an FFT window position based on a metric related to inter-symbol interference (ISI) and inter-carrier interference (ICI). The receiver may determine an early energy for signal paths earlier than the current FFT window position, determine a late energy for signal paths later than the current FFT window position, determine the metric based on the early and late energies, compute an update amount for the FFT window position based on the metric, and update the FFT window position based on the update amount with a time tracking loop (TTL). In yet another aspect, the receiver may compute the FFT window position based on a channel impulse response (CIR) estimate directly, without using a TTL.

    Abstract translation: 描述了在利用循环前缀的通信系统中执行时间跟踪的技术。 在一方面，接收机可以执行时间跟踪，并且基于与符号间干扰（ISI）和载波间干扰（ICI）相关的度量来确定FFT窗口位置。 接收机可以在比当前FFT窗口位置更早地确定信号路径的早期能量，确定晚于当前FFT窗口位置的信号路径的延迟能量，基于早期和晚期能量来确定度量，计算更新量 基于度量的FFT窗口位置，并使用时间跟踪循环（TTL）更新基于更新量的FFT窗口位置。 在另一方面，接收机可以直接地计算基于信道脉冲响应（CIR）估计的FFT窗口位置，而不使用TTL。

    MULTI-TERM DEMAPPING FOR MULTI-CHANNEL WIRELESS COMMUNICATION
    7.
    发明申请
    MULTI-TERM DEMAPPING FOR MULTI-CHANNEL WIRELESS COMMUNICATION 审中-公开
    多通道无线通信多用途解决方案

    公开(公告)号：WO2011106264A2

    公开(公告)日：2011-09-01

    申请号：PCT/US2011025552

    申请日：2011-02-18

    Applicant: QUALCOMM INC ,  MCCLOUD MICHAEL L ,  BREHLER MATTHIAS ,  PARK JU WON ,  PARK JONG HYEON ,  KIM JE WOO ,  KANG INYUP ,  BANISTER BRIAN C

    Inventor： MCCLOUD MICHAEL L ,  BREHLER MATTHIAS ,  PARK JU WON ,  PARK JONG HYEON ,  KIM JE WOO ,  KANG INYUP ,  BANISTER BRIAN C

    CPC classification number: H04L25/03229 ,  H04B7/0413 ,  H04L25/03242 ,  H04L25/03318 ,  H04L2025/0342 ,  H04L2025/03426

    Abstract: Providing for reduced complexity or improved accuracy in de-mapping received wireless data streams for multi-channel wireless communication is described herein. By way of example, a low-complexity likelihood algorithm can be employed to de-map data bits from the wireless data streams. In one particular example, the likelihood algorithm can approximate a received bit with a subset of received wireless symbols correlated the bit, reducing algorithm complexity. In other examples, a limited set of received wireless symbols can be employed for the subset, further reducing algorithm complexity. According to at least one other example, logarithmic terms of the algorithm can be approximated with non-logarithmic functions, such as a look-up table, series expansion, polynomial approximation, or the like. These approximations can enhance symbol de-mapping accuracy while maintaining or improving processing overhead for a wireless receiver.

    Abstract translation: 这里描述了降低复杂度或提高对多信道无线通信的接收无线数据流解映射的准确性。 作为示例，可以采用低复杂度似然算法来从无线数据流解映射数据比特。 在一个特定示例中，似然算法可以用接收到的无线符号的子集近似接收到的比特，从而降低算法的复杂度。 在其他示例中，可以对子集采用有限的一组接收到的无线符号，进一步降低了算法的复杂度。 根据至少另一个示例，算法的对数项可以用非对数函数近似，例如查找表，串联展开，多项式近似等。 这些近似可以增强符号解映射精度，同时保持或改善无线接收机的处理开销。

    TIME TRACKING LOOPS FOR A MULTICARRIER COMMUNICATION SYSTEM UTILIZING A CYCLIC PREFIX
    8.
    发明申请
    TIME TRACKING LOOPS FOR A MULTICARRIER COMMUNICATION SYSTEM UTILIZING A CYCLIC PREFIX 审中-公开
    使用循环前缀的多媒体通信系统的时间跟踪

    公开(公告)号：WO2011002935A3

    公开(公告)日：2011-03-31

    申请号：PCT/US2010040675

    申请日：2010-06-30

    Applicant: QUALCOMM INC ,  SRINIVASAN SHIVRATNA G ,  MCCLOUD MICHAEL L ,  GURSKI REMI J ,  KANDUKURI NARAYANA SUNIL KUMAR

    Inventor： SRINIVASAN SHIVRATNA G ,  MCCLOUD MICHAEL L ,  GURSKI REMI J ,  KANDUKURI NARAYANA SUNIL KUMAR

    IPC: H04L27/26 ,  H04L25/02

    CPC classification number: H04L27/2662 ,  H04L25/0212 ,  H04L27/2665

    Abstract: Techniques for performing time tracking in a communication system utilizing a cyclic prefix are described. In an aspect, a receiver may detect for large timing errors based on early and late received samples obtained with early and late FFT windows, respectively. The receiver may derive first and second channel impulse response (CIR) estimates based on the early and late received samples, respectively, determine an early channel energy based on the first CIR estimate, determine a late channel energy based on the second CIR estimate, compute an update amount based on the early and late channel energies, and update the FFT window position based on the update amount. In another aspect, the receiver may perform time tracking with an inner time tracking loop (TTL) and an outer TTL. The receiver may update the FFT window position in coarse steps with the outer TTL and in fine steps with the inner TTL.

    Abstract translation: 描述了在利用循环前缀的通信系统中执行时间跟踪的技术。 在一方面，接收机可以分别基于早期和晚期FFT窗口获得的早期和晚期接收样本来检测大的定时误差。 接收机可以基于早期和晚期接收的采样分别导出第一和第二信道脉冲响应（CIR）估计，基于第一CIR估计确定早期信道能量，基于第二CIR估计确定后期信道能量，计算 基于早期和晚期信道能量的更新量，并且基于更新量来更新FFT窗口位置。 在另一方面，接收机可以利用内部时间跟踪环（TTL）和外部TTL来执行时间跟踪。 接收机可以以外部TTL以粗略的步骤更新FFT窗口位置，并以内部TTL进行微调。

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