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    Systems and methods for detecting data collisions for a near field communication system
    2.
    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。

    Adaptive slicer for a discrete level amplitude modulation receiver
    3.
    发明授权
    Adaptive slicer for a discrete level amplitude modulation receiver 有权
    用于离散电平调幅接收机的自适应限幅器

    公开(公告)号：US08903313B2

    公开(公告)日：2014-12-02

    申请号：US13791705

    申请日：2013-03-08

    Applicant: QUALCOMM Incorporated

    Inventor： Eunmo Kang ,  James Y. Hurt

    IPC: H04B5/00 ,  H04L25/06

    CPC classification number: H04B5/00 ,  H04B5/0062 ,  H04B5/0075 ,  H04L25/066

    Abstract: In a wireless communication system, an initiator, such as a card reader, can communicate with a target, such as a smart card or other device emulating a smart card, by amplitude modulating a radio frequency signal. In a receiver, levels of samples of a digital baseband signal of the amplitude modulated signal can vary. Apparatus and methods associate a received sample with a hard or sliced output state (such as +1, 0, or −1) and update a value associated with the hard output state for accurate slicing of the samples. This permits the use of hard symbols in further processing rather than soft samples, which can dramatically reduce the complexity of circuitry.

    Abstract translation: 在无线通信系统中，诸如读卡器的发起者可以通过幅度调制射频信号来与诸如智能卡或模拟智能卡的其它设备的目标通信。 在接收机中，幅度调制信号的数字基带信号的采样电平可以变化。 装置和方法将接收到的样本与硬切片输出状态（例如+1,0或-1）相关联，并更新与硬输出状态相关联的值，以准确切片样本。 这允许在进一步处理中使用硬符号而不是软样本，这可以显着降低电路的复杂性。

    APPARATUS AND METHOD OF RECEIVER ARCHITECTURE AND LOW-COMPLEXITY DECODER FOR LINE-CODED AND AMPLITUDE-MODULATED SIGNAL
    4.
    发明申请
    APPARATUS AND METHOD OF RECEIVER ARCHITECTURE AND LOW-COMPLEXITY DECODER FOR LINE-CODED AND AMPLITUDE-MODULATED SIGNAL 有权
    接收机架构和线路编码和振幅调制信号的低复杂度解码器的装置和方法

    公开(公告)号：US20140086347A1

    公开(公告)日：2014-03-27

    申请号：US13786709

    申请日：2013-03-06

    Applicant: QUALCOMM INCORPORATED

    Inventor： Eunmo Kang

    IPC: H04B5/00

    CPC classification number: H04B5/0025 ,  H04B1/06 ,  H04B5/0031 ,  H04B5/0062 ,  H04B10/60 ,  H04L25/06 ,  H04L25/4904 ,  H04L27/08

    Abstract: A receiver apparatus is disclosed. In one aspect, the apparatus includes a receiverinterface configured to receive a signal from a transmitter and output an input sequence of M-bit samples. The apparatus also includes a quantizer circuit configured to convert the input sequence of M-bit samples into an output sequence of N-bit samples, wherein M and N are positive integer numbers, and wherein M is greater than N. The apparatus further includes a decoder circuit configured to decode the output sequence of N-bit samples.

    Abstract translation: 公开了一种接收装置。 一方面，该装置包括：接收器接口，被配置为从发射机接收信号并输出​​M位采样的输入序列。 该装置还包括量化器电路，其被配置为将M位采样的输入序列转换成N位采样的输出序列，其中M和N是正整数，并且其中M大于N.该装置还包括： 解码器电路，被配置为对N位采样的输出序列进行解码。

    Apparatus and method for reducing phase noise in near field communication device signaling
    7.
    发明授权
    Apparatus and method for reducing phase noise in near field communication device signaling 有权
    用于减少近场通信设备信号中的相位噪声的装置和方法

    公开(公告)号：US09094113B2

    公开(公告)日：2015-07-28

    申请号：US13841155

    申请日：2013-03-15

    Applicant: QUALCOMM Incorporated

    Inventor： Eugene Yang ,  Eunmo Kang ,  Faramarz Sabouri

    IPC: H04B5/00 ,  H04B15/00 ,  H03D3/00 ,  H03D7/16 ,  H04L27/20 ,  H04L27/00 ,  H04L25/49 ,  H04L7/033

    CPC classification number: H04B15/00 ,  H03D3/009 ,  H03D7/165 ,  H04B5/00 ,  H04L7/033 ,  H04L25/4902 ,  H04L27/206 ,  H04L27/2092 ,  H04L2027/0018 ,  H04L2027/0057 ,  H04L2027/0067

    Abstract: A method for communication between near field communication (NFC) devices includes generating a transmission signal, an in-phase local oscillator signal, and a quadrature local oscillator signal from edges of an input clock signal. The method further includes mixing a load modulated signal with the in-phase local oscillator signal to generate an in-phase baseband signal. The method further includes mixing the load modulated signal with the quadrature local oscillator signal to generate a quadrature baseband signal. The method further includes adjusting a phase delay of at least one of the in-phase local oscillator signal or the quadrature local oscillator signal in response to a first signal strength of the in-phase baseband signal and a second signal strength of the quadrature baseband signal.

    Abstract translation: 用于近场通信（NFC）设备之间的通信的方法包括从输入时钟信号的边缘产生发送信号，同相本地振荡器信号和正交本地振荡器信号。 该方法还包括将负载调制信号与同相本地振荡器信号混合以产生同相基带信号。 该方法还包括将负载调制信号与正交本地振荡器信号混合以产生正交基带信号。 该方法还包括响应于同相基带信号的第一信号强度和正交基带信号的第二信号强度来调整同相本地振荡器信号或正交本地振荡器信号中的至少一个的相位延迟 。

    ADAPTIVE FM DEMODULATOR SUPPORTING MULTIPLE MODES
    8.
    发明申请
    ADAPTIVE FM DEMODULATOR SUPPORTING MULTIPLE MODES 有权
    自适应FM调制解调器支持多种模式

    公开(公告)号：US20150137883A1

    公开(公告)日：2015-05-21

    申请号：US14083900

    申请日：2013-11-19

    Applicant: QUALCOMM Incorporated

    Inventor： Eunmo Kang ,  Le Nguyen Luong ,  Yossef Tsfaty

    IPC: H03D3/00

    CPC classification number: H03D3/006 ,  H03D3/00 ,  H03D3/001 ,  H03D2200/0045 ,  H03D2200/0054 ,  H04B1/1646 ,  H04L27/14 ,  H04L27/148 ,  H04L27/152

    Abstract: Methods, systems, and devices are described for an adaptive demodulator that supports multiple modes. An FM signal may be received at a demodulator and parameters corresponding to the FM signal may be identified. Connections between multiple modules within the demodulator may be configured, based at least in part on the parameters, to select one of multiple demodulation modes supported by the demodulator to demodulate the FM signal. The modes may include a phase differencing mode, a phase-locked loop (PLL) mode, a frequency-compressive feedback (FCF) mode, and/or a quadrature detector mode. The parameters may include one or both of a signal strength of the FM signal and a maximum frequency deviation of the FM signal. Based on the parameters, one or more signals may be generated to configure the connections within the demodulator. A switch from one mode to another may occur when one of the parameters breaches a threshold value.

    Abstract translation: 为支持多种模式的自适应解调器描述了方法，系统和设备。 可以在解调器处接收FM信号，并且可以识别与FM信号对应的参数。 至少部分地基于参数，解调器内的多个模块之间的连接可以被配置为选择由解调器支持的多个解调模式之一以解调FM信号。 这些模式可以包括相位差分模式，锁相环（PLL）模式，频率 - 压缩反馈（FCF）模式和/或正交检测器模式。 参数可以包括FM信号的信号强度和FM信号的最大频率偏差中的一个或两个。 基于这些参数，可以生成一个或多个信号来配置解调器内的连接。 当其中一个参数违反阈值时，可能会发生从一种模式切换到另一种模式的切换。

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