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公开(公告)号：US20160241382A1
公开(公告)日：2016-08-18
申请号：US14863082
申请日：2015-09-23
Applicant: QUALCOMM Incorporated
Inventor： Eunmo Kang , Mahbod Mofidi , Paul DenBoer , Xiao Deng , Ashish Subhash Banthia , Vincent So , Vikram Meka
IPC: H04L7/00
CPC classification number: H04L7/0087 , H04B5/00 , H04L7/00 , H04L7/0037 , H04L7/10
Abstract: A method for communications is described. The method includes determining a symbol timing drift elimination amount for a received signal. The method further includes eliminating part of the symbol timing drift by adjusting a reference clock for the modem. Determining the symbol timing drift elimination amount may be based on at least one of a symbol timing drift estimate, a symbol timing error, a packet acquisition indicator, a packet validity indicator, demodulated bits or a carrier presence indicator.
Abstract translation: 描述用于通信的方法。 该方法包括确定接收信号的符号定时漂移消除量。 该方法还包括通过调整调制解调器的参考时钟来消除部分符号定时漂移。 确定符号定时漂移消除量可以基于符号定时漂移估计，符号定时误差，分组获取指示符，分组有效性指示符，解调比特或载波存在指示符中的至少一个。
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12.发明申请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：US20140086292A1
公开(公告)日：2014-03-27
申请号：US13791737
申请日：2013-03-08
Applicant: QUALCOMM INCORPORATED
Inventor： Koorosh Akhavan , RaviKiran Gopalan , Eunmo Kang , Le Nguyen Luong
IPC: H04B5/00
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。
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公开(公告)号：US20170288923A1
公开(公告)日：2017-10-05
申请号：US15255783
申请日：2016-09-02
Applicant: QUALCOMM Incorporated
Inventor： Rajapaksa Senaratne , Eunmo Kang , Koorosh Akhavan
CPC classification number: H04L27/22 , H04B17/309 , H04L1/00 , H04L27/2082
Abstract: Methods and systems for hardware-efficient carrier sensing are disclosed. The method may include receiving a received signal during a detection window, generating a phase-discriminated waveform based on the received signal, determining a plurality of absolute values respectively based on a plurality of correlations of the phase-discriminated waveform, and generating a detection metric based on a peak value of the plurality of absolute values.
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14.发明授权Apparatus and method of receiver architecture and low-complexity decoder for line-coded and amplitude-modulated signal 有权用于线路编码和幅度调制信号的接收机架构和低复杂度解码器的装置和方法公开(公告)号：US09143200B2
公开(公告)日：2015-09-22
申请号：US13786709
申请日：2013-03-06
Applicant: QUALCOMM Incorporated
Inventor： Eunmo Kang
CPC classification number: H04B5/0025 , H04B1/06 , H04B5/0031 , H04B5/0062 , H04B10/60 , H04L25/06 , H04L25/4904 , H04L27/08
Abstract: In some examples, the receiver apparatus includes a receiver interface configured to receive a signal from a transmitter and output an input sequence of M-bit samples. The apparatus may also include 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 may further include a decoder circuit configured to decode the output sequence of N-bit samples.
Abstract translation: 在一些示例中，接收机设备包括被配置为从发射机接收信号并输出M位样本的输入序列的接收机接口。 该装置还可以包括量化器电路，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.该装置可以进一步 包括被配置为对N比特采样的输出序列进行解码的解码器电路。
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公开(公告)号：US09143087B2
公开(公告)日：2015-09-22
申请号：US14083900
申请日：2013-11-19
Applicant: QUALCOMM Incorporated
Inventor： Eunmo Kang , Le Nguyen Luong , Yossef Tsfaty
IPC: H03D3/00 , H04L27/14 , H04L27/148 , H04L27/152 , H04B1/16
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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Patent Agency Ranking
16.发明申请公开(公告)号：US20150133069A1
公开(公告)日：2015-05-14
申请号：US14080551
申请日：2013-11-14
Applicant: QUALCOMM Incorporated
Inventor： Eunmo Kang , Yossef Tsfaty , Le Nguyen Luong
CPC classification number: H04L27/14 , H04B1/1646
Abstract: Methods, systems, and devices are described for wireless communications in a frequency modulation (FM) receiver with a frequency deviation-dependent adaptive channel filter. A maximum frequency deviation of an FM broadcast signal may be estimated. One or more coefficients of a channel filter may be adapted based at least in part on the maximum frequency deviation. The coefficient adaptation may include identifying a set of coefficients corresponding to the maximum frequency deviation and applying the set of coefficients to the channel filter. The set of coefficients may be identified by selecting one of multiple sets of coefficients stored in memory. In some instances, a signal quality metric (e.g., signal-to-noise ratio (SNR)) may be identified and may be used to modify a value of one or more of the set of coefficients applied to the channel filter.
Abstract translation: 对具有频偏偏移自适应信道滤波器的频率调制（FM）接收机中的无线通信描述了方法，系统和设备。 可以估计FM广播信号的最大频率偏差。 可以至少部分地基于最大频率偏差来适应信道滤波器的一个或多个系数。 系数自适应可以包括识别对应于最大频率偏差的一组系数，并将该组系数应用于信道滤波器。 可以通过选择存储在存储器中的多组系数中的一组来识别系数集合。 在一些情况下，可以识别信号质量度量（例如，信噪比（SNR）），并且可以用于修改施加到信道滤波器的系数集合中的一个或多个的值。
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17.发明申请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：US20140273828A1
公开(公告)日：2014-09-18
申请号：US13841155
申请日：2013-03-15
Applicant: QUALCOMM INCORPORATED
Inventor： Eugene Yang , Eunmo Kang , Faramarz Sabouri
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 。
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公开(公告)号：US11330468B2
公开(公告)日：2022-05-10
申请号：US16832425
申请日：2020-03-27
Applicant: QUALCOMM Incorporated
Inventor： Seyed Mohammad Ehsan Hosseini , Le Nguyen Luong , Eunmo Kang , Dongsik Kim
Abstract: This disclosure provides systems, devices, apparatus, and methods, including computer programs encoded on storage media, related to low power techniques for a BLE device during a scanning state. The BLE device is configured to scan for a preamble of a packet while in a first power mode and detect when a bit of the preamble is received. Upon detecting that the bit of the preamble is received, the BLE device switches from the first power mode to a second power having a higher operating power for the BLE device than the first power mode. The switch in power modes occurs while the preamble is being received or immediately after the preamble is received and before an access address of the packet is received. The BLE device, while in the second power mode, then scans for the access address of the packet.
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19.发明授权公开(公告)号：US09960940B2
公开(公告)日：2018-05-01
申请号：US15255659
申请日：2016-09-02
Applicant: QUALCOMM Incorporated
Inventor： Koorosh Akhavan , Eunmo Kang , Rajapaksa Senaratne
CPC classification number: H04L27/20 , H04B1/0017 , H04B1/0475 , H04B2001/0491 , H04L25/03828 , H04L25/03834 , H04L25/03853 , H04L25/03859 , H04L27/122
Abstract: Systems and methods are directed to phase modulation of polar coordinates in a transmitter of wireless signals, to achieve high transmit power levels while meeting spectral mask and EVM requirements. An input signal is mapped to a sequence of modulation frequency (e.g., O-QPSK to MSK) to generate a mapped signal. A digital frequency shaping filter is applied to the mapped signal to generate a shaped signal. An adaptive rounding algorithm is applied to the shaped signal to generate a reduced bit-width signal. A digital frequency synthesizer is applied to the reduced bit-width signal to generate an analog waveform for transmission.
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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.
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