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    Systems and methods for detecting data collisions for a near field communication system
    11.
    发明授权
    Systems and methods for detecting data collisions for a near field communication system 有权
    用于检测近场通信系统的数据冲突的系统和方法

    公开(公告)号：US08942278B2

    公开(公告)日：2015-01-27

    申请号：US13791737

    申请日：2013-03-08

    Applicant: QUALCOMM Incorporated

    Inventor： Koorosh Akhavan ,  RaviKiran Gopalan ,  Eunmo Kang ,  Le Nguyen Luong

    IPC: H04B3/46 ,  H04B17/00 ,  H04B5/00 ,  H04Q1/20

    CPC classification number: H04B5/00

    Abstract: In a wireless near field communication (NFC) system, a target, such as a smart card, can communicate with an initiator, such as a card reader, by load modulating a radio frequency (RF) signal generated by the initiator. When two or more targets load modulate the RF signal generated, “collisions” can occur with the load modulation. Apparatus and methods detect the presence or absence of collisions in a lower layer or physical layer and report the presence of detected collisions to an upper layer for further handling.

    Abstract translation: 在无线近场通信（NFC）系统中，诸如智能卡的目标可以通过负载调制由发起者产生的射频（RF）信号与诸如读卡器的发起者进行通信。 当两个或多个目标负载调制产生的RF信号时，负载调制可能会发生“碰撞”。 装置和方法检测下层或物理层中是否存在碰撞，并将检测到的碰撞的存在报告给上层进行进一步处理。

    METHODS AND APPARATUS FOR IMPROVING ACQUISITION FOR NFC LOAD MODULATION
    12.
    发明申请
    METHODS AND APPARATUS FOR IMPROVING ACQUISITION FOR NFC LOAD MODULATION 有权
    用于改善NFC负载调制采集的方法和装置

    公开(公告)号：US20140073241A1

    公开(公告)日：2014-03-13

    申请号：US13736174

    申请日：2013-01-08

    Applicant: QUALCOMM INCORPORATED

    Inventor： Le Nguyen Luong ,  RaviKiran Gopalan ,  Koorosh Akhavan

    IPC: H04B5/00

    CPC classification number: H04W4/008 ,  H04B5/00 ,  H04B5/0031 ,  H04L7/042 ,  H04L7/10 ,  H04W4/80

    Abstract: Aspects disclosed herein relate to improving acquisition for NFC load modulation. In one example, a communications device is equipped to monitor at least a complex component of load modulation of a carrier signal, detect, using a NFC technology type specific peak detection scheme, a peak associated with at least the complex component, and determine a presence of a packet beginning pattern based on the detected peak. In an aspect, the packet beginning pattern may be associated with a reception of a packet from a target NFC device.

    Abstract translation: 本文公开的方面涉及改进对NFC负载调制的采集。 在一个示例中，通信设备被配备为监视载波信号的负载调制的至少一个复杂分量，使用NFC技术类型特定的峰值检测方案检测与至少复杂分量相关联的峰值，并且确定存在 基于检测到的峰值的分组开始模式。 在一方面，分组开始模式可以与来自目标NFC设备的分组的接收相关联。

    Wideband-assisted ultra-wideband (UWB) sensing
    13.
    发明授权
    Wideband-assisted ultra-wideband (UWB) sensing 有权

    公开(公告)号：US12248059B2

    公开(公告)日：2025-03-11

    申请号：US17931470

    申请日：2022-09-12

    Applicant: QUALCOMM Incorporated

    Inventor： Dongsik Kim ,  Koorosh Akhavan ,  Anand Srinivas Guruswamy ,  Damith Nivantha Senaratne ,  Le Nguyen Luong

    IPC: H04L25/02 ,  G01S13/76 ,  G01S13/87

    Abstract: An example method of ultra-wideband (UWB) sensing performed by a wireless communication device, the method comprising determining a first channel impulse response (CIR) estimation of a first frequency channel based on a radio access technology (RAT) session, wherein the RAT is different from UWB. The method also comprises determining a second CIR estimation of a second frequency channel based on a UWB session and determining a third CIR estimation of the first frequency channel based on determining a phase difference between the third CIR estimation and the first CIR estimation. The method further comprises determining a total CIR estimation for a combined frequency channel comprising the first frequency channel and the second frequency channel based on stitching the first CIR estimation, the second CIR estimation, and the third CIR estimation.

    TIMING-ERROR DETECTION FOR CONTINUOUS-PHASE MODULATED SIGNALS
    15.
    发明申请
    TIMING-ERROR DETECTION FOR CONTINUOUS-PHASE MODULATED SIGNALS 审中-公开

    公开(公告)号：US20170288810A1

    公开(公告)日：2017-10-05

    申请号：US15247789

    申请日：2016-08-25

    Applicant: QUALCOMM Incorporated

    Inventor： Eunmo Kang ,  Rajapaksa Senaratne ,  Koorosh Akhavan

    IPC: H04L1/00

    CPC classification number: H04L1/0045 ,  H04L1/0023 ,  H04L7/0041 ,  H04L7/0054 ,  H04L7/02 ,  H04L27/2003 ,  H04L27/2014 ,  H04L27/2017 ,  H04W88/02 ,  H04W88/08

    Abstract: In an embodiment, a receiver detects a timing error between a transmitter clock at a transmitter and a receiver clock at a receiver associated with an exchange of CPM signals. The receiver phase aligns input samples of a candidate received signal over a time window based on a rotating signal corresponding to a phase progression of the candidate received signal. The receiver generates first and second partial sums of the phase-aligned input samples that are accumulations of phase-aligned input samples corresponding to modulation symbols that contribute positive and negative phases, respectively, to the phase progression. The receiver determines a phase difference between the first and second partial sums, and generates a timing-error metric that is indicative of a timing error between the transmitter clock and the receiver clock based at least in part upon the determined phase difference.

    Systems and methods for gain and offset control
    16.
    发明授权
    Systems and methods for gain and offset control 有权

    公开(公告)号：US09647646B2

    公开(公告)日：2017-05-09

    申请号：US14550682

    申请日：2014-11-21

    Applicant: QUALCOMM Incorporated

    Inventor： Rajapaksa Senaratne ,  Koorosh Akhavan ,  Le Nguyen Luong ,  Eunmo Kang

    IPC: H03L5/00 ,  H03K5/003 ,  H03G3/30

    CPC classification number: H03K5/003 ,  H03G3/3078

    Abstract: A method for setting an initial gain and an initial offset for an automatic gain and offset controller (AGOC) is described. The method includes determining a gain level at which a signal does not under-saturate or over-saturate an input to an analog-to-digital converter (ADC) by performing a binary search over a fixed set of gain levels while an offset is fixed. The method also includes determining an offset correction to bring an unmodulated carrier level at an output of the ADC to a target level. The method may also include updating the gain and the offset in response to changes in a signal level.

    SYSTEMS AND METHODS FOR GAIN AND OFFSET CONTROL
    17.
    发明申请
    SYSTEMS AND METHODS FOR GAIN AND OFFSET CONTROL 有权
    用于增益和偏移控制的系统和方法

    公开(公告)号：US20150303904A1

    公开(公告)日：2015-10-22

    申请号：US14550682

    申请日：2014-11-21

    Applicant: QUALCOMM Incorporated

    Inventor： Rajapaksa Senaratne ,  Koorosh Akhavan ,  Le Nguyen Luong ,  Eunmo Kang

    IPC: H03K5/003

    CPC classification number: H03K5/003 ,  H03G3/3078

    Abstract: A method for setting an initial gain and an initial offset for an automatic gain and offset controller (AGOC) is described. The method includes determining a gain level at which a signal does not under-saturate or over-saturate an input to an analog-to-digital converter (ADC) by performing a binary search over a fixed set of gain levels while an offset is fixed. The method also includes determining an offset correction to bring an unmodulated carrier level at an output of the ADC to a target level. The method may also include updating the gain and the offset in response to changes in a signal level.

    Abstract translation: 描述了一种用于设置自动增益和偏移控制器（AGOC）的初始增益和初始偏移量的方法。 该方法包括通过在固定的增益电平集合上执行二进制搜索来确定信号未饱和或过饱和模拟数字转换器（ADC）的增益电平，同时偏移量固定 。 该方法还包括确定偏移校正以使ADC的输出处的未调制载波电平达到目标电平。 该方法还可以包括响应于信号电平的变化来更新增益和偏移。

    SYSTEMS AND METHODS FOR TIMING RECOVERY IN NEAR-FIELD COMMUNICATION
    18.
    发明申请
    SYSTEMS AND METHODS FOR TIMING RECOVERY IN NEAR-FIELD COMMUNICATION 有权
    用于定时恢复近场通信的系统和方法

    公开(公告)号：US20150256324A1

    公开(公告)日：2015-09-10

    申请号：US14628798

    申请日：2015-02-23

    Applicant: QUALCOMM Incorporated

    Inventor： Eunmo Kang ,  Le Nguyen Luong ,  Koorosh Akhavan ,  Rajapaksa Senaratne ,  Thomas Cargill

    IPC: H04L7/00 ,  H04B5/00

    CPC classification number: H04L7/0016 ,  H04B5/0031 ,  H04B5/0056 ,  H04B5/0075 ,  H04B5/02 ,  H04L7/033 ,  H04L7/04 ,  H04L25/49

    Abstract: A method for inductively-coupled communications is described. The method includes receiving a signal. The method also includes analyzing the signal to estimate a symbol timing error. Estimating the symbol timing error may include comparing a location of a pause, a low-to-high or a high-to-low transition in the received signal with an ideal location of a pause or a transition. The method further includes adjusting symbol timing to correct for the symbol timing error.

    Abstract translation: 描述了一种用于电感耦合通信的方法。 该方法包括接收信号。 该方法还包括分析信号以估计符号定时误差。 估计符号定时误差可以包括将接收到的信号中的暂停位置，从低到高或从高到低的转变与暂停或转换的理想位置进行比较。 该方法还包括调整符号定时以校正符号定时误差。

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