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    PHASE-NOISE RESILIENT GENERATION OF A CHANNEL QUALITY INDICATOR
    101.
    发明公开
    PHASE-NOISE RESILIENT GENERATION OF A CHANNEL QUALITY INDICATOR 有权
    相位噪声PRODUCTION STABLE信道质量指示符

    公开(公告)号：EP2297895A2

    公开(公告)日：2011-03-23

    申请号：EP09789894.4

    申请日：2009-06-23

    Applicant: QUALCOMM Incorporated

    Inventor： LU, Feng ,  SRIPATHI, Prashant, Udupa ,  ZHAO, Liang ,  SUBRAHMANYA, Parvathanathan ,  RAO, Subramanya, P.

    IPC: H04L1/20

    CPC classification number: H04W52/245 ,  H04B17/345 ,  H04L1/0026 ,  H04L1/20 ,  H04W52/241 ,  H04W52/243

    Abstract: System(s) and method(s) are provided for generating phase-noise resilient channel quality indicator(s). A pilot signal utilized to determine a channel quality indicator is rotated to be aligned to a phase reference signal. Separate noise evaluations in quadrature and in-phase directions are utilized, at least in part, to generate a net noise estimate that is phase-noise compensated or resilient. For example, various combination schemes of quadrature and in-phase noise evaluations can be exploited to generate a net noise estimate, the schemes include weighted average of in-phase and quadrature noise estimates and running averages thereof. Simulation of net noise estimates as a function of geometry conditions reveal that the combination schemes provide substantive mitigation of phase-noise, thus making CQI generation phase-noise resilient.

    ADAPTIVE PILOT AND DATA SYMBOL ESTIMATION
    102.
    发明公开
    ADAPTIVE PILOT AND DATA SYMBOL ESTIMATION 审中-公开
    自适应导弹 - 日内瓦文康多黎各

    公开(公告)号：EP2135415A2

    公开(公告)日：2009-12-23

    申请号：EP08780512.3

    申请日：2008-04-09

    Applicant: QUALCOMM Incorporated

    Inventor： ABRISHAMKAR, Farrokh ,  MOTAMED, Mariam ,  SUBRAHMANYA, Parvathanathan

    IPC: H04L25/02

    CPC classification number: H04L25/0228

    Abstract: Techniques for performing adaptive channel estimation are described. A receiver derives channel estimates for a wireless channel based on received pilot symbols and at least one estimation parameter. The receiver updates the at least one estimation parameter based on the received pilot symbols. The at least one estimation parameter may be for an innovations representation model of the wireless channel and may be updated based on a cost function with costs defined by prediction errors. In one design, the receiver derives predicted pilot symbols based on the received pilot symbols and the at least one estimation parameter, determines prediction errors based on the received pilot symbols and the predicted pilot symbols, and further derives error gradients based on the prediction errors. The receiver then updates the at least one estimation parameter based on the error gradients and the prediction errors, e.g., if a stability test is satisfied.

    Abstract translation: 描述用于执行自适应信道估计的技术。 接收机基于接收的导频符号和至少一个估计参数导出无线信道的信道估计。 接收机基于接收到的导频符号来更新至少一个估计参数。 所述至少一个估计参数可以用于无线信道的创新表示模型，并且可以基于具有由预测误差定义的成本的成本函数来更新。 在一种设计中，接收机基于接收到的导频符号和至少一个估计参数导出预测导频符号，基于接收到的导频符号和预测的导频符号来确定预测误差，并且还基于预测误差导出误差梯度。 然后，接收器基于误差梯度和预测误差来更新至少一个估计参数，例如，如果满足稳定性测试。

    SPREAD SPECTRUM RECEIVER WITH FREQUENCY TRACKING WHICH USES PILOTS SIGNALS
    107.
    发明公开
    SPREAD SPECTRUM RECEIVER WITH FREQUENCY TRACKING WHICH USES PILOTS SIGNALS 审中-公开
    麻疹麻疹麻疹麻疹麻疹大肠杆菌VERWENDENDEM FREQUENZNACHLAUF

    公开(公告)号：EP1425892A2

    公开(公告)日：2004-06-09

    申请号：EP02768780.5

    申请日：2002-08-29

    Applicant: Qualcomm, Incorporated

    Inventor： SUBRAHMANYA, Parvathanathan ,  SENDONARIS, Andrew

    IPC: H04L27/00 ,  H04B1/707

    CPC classification number: H04L27/2332 ,  H04B2201/70701 ,  H04L2027/0055 ,  H04L2027/0065 ,  H04L2027/0081 ,  H04L2027/0087

    Abstract: Techniques to acquire and track a received signal based on one or more transmitted pilots. In an aspect, a frequency tracking loop is provided and supports a number of loop modes (e.g., acquisition and tracking modes). Each loop mode may be associated with a respective frequency detector and a set of values for a set of elements in the loop. In another aspect, several frequency detectors are provided for deriving estimates of the frequency error in the downconversion (e.g., from radio frequency to baseband). In one design, maximum likelihood estimates of the frequency error are derived based on the recovered pilot symbols. In another design, the frequency error estimates for the multipath are derived based on the frequency error estimated for each transmitted signal.

    Abstract translation: 基于一个或多个发射的导频获取和跟踪接收到的信号实例（或多路径）的技术。 在一方面，提供频率跟踪环以获取和跟踪多路径，并且支持多种环路模式（例如，采集和跟踪模式）。 每个循环模式可以与相应的频率检测器和一组循环中的元件的值相关联。 在另一方面，提供了几个频率检测器用于导出多径下变频（例如，从射频到基带）中的频率误差的估计。 在一种设计中，基于恢复的导频符号导出频率误差的最大似然估计。 在另一种设计中，基于针对每个发射信号估计的频率误差导出多路径的频率误差估计。

    ADAPTIVE RADIO LINK MONITORING
    108.
    发明公开
    ADAPTIVE RADIO LINK MONITORING 审中-公开

    公开(公告)号：EP3745623A1

    公开(公告)日：2020-12-02

    申请号：EP20186010.3

    申请日：2017-02-03

    Applicant: QUALCOMM Incorporated

    Inventor： CHINCHOLI, Amith Vikram ,  SUBRAHMANYA, Parvathanathan ,  GHEORGHIU, Valentin Alexandru

    IPC: H04L1/00 ,  H04L1/20

    Abstract: Aspects of the present disclosure provide adaptive radio link monitoring for machine type communication(s) (MTC), enhanced MTC (eMTC), and/or narrowband Internet-of-Things (NB-IoT). In one aspect, a method is provided which may be performed by a user equipment (UE). The method generally includes receiving a first configuration of parameters for receiving downlink control channel signaling, the first configuration of parameters associated with a first coverage level; measuring at least one parameter related to channel conditions; determining one or more dynamic radio link monitoring (RLM) threshold values for the at least one parameter based, at least in part, on the first configuration of parameters; and performing RLM functions based on the one or more dynamic RLM threshold values. The threshold may comprise early out thresholds that occur before out-of-sync (OOS) or in-sync thresholds. The thresholds may be determined using lookup tables.

    VOLTE OPTIMIZATIONS FOR EMTC DEVICES
    109.
    发明公开
    VOLTE OPTIMIZATIONS FOR EMTC DEVICES 审中-公开

    公开(公告)号：EP3633910A1

    公开(公告)日：2020-04-08

    申请号：EP19212489.9

    申请日：2017-07-12

    Applicant: QUALCOMM Incorporated

    Inventor： RICO ALVARINO, Alberto ,  ANCHAN, Kirankumar Bhoja ,  VUMMINTALA, Shashidhar ,  BALASUBRAMANIAN, Srinivasan ,  XU, Hao ,  SUBRAHMANYA, Parvathanathan ,  FAKOORIAN, Seyed Ali Akbar ,  GAAL, Peter ,  SOMICHETTY, Gowrisankar

    IPC: H04L5/00

    Abstract: Aspects of the present disclosure relate to methods and apparatus for optimizing real time services (e.g., such as a voice over Long Term Evolution (LTE) (VoLTE)) for devices with limited communications resources, such as machine type communication (MTC) devices and enhanced MTC (eMTC) devices. In one aspect, a UE determines a first configuration of subframes within at least one radio frame available for the UE and other UEs to use for bundled communications with a BS. The UE receives an indication of one or more subframes within the at least one radio frame that are unavailable for bundled uplink transmissions, and determines a second configuration of subframes to use for bundled communications based on the indication. The UE overrides the first configuration of subframes with the second configuration of subframes, and communicates with the BS using the second configuration of subframes. Numerous other aspects are provided.

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