公开(公告)号：US20190325283A1

公开(公告)日：2019-10-24

申请号：US16456795

申请日：2019-06-28

Applicant: STMicroelectronics International N.V.

Inventor： Achraf Dhayni

IPC: G06K19/07 ,  G06K7/00 ,  G06K19/073 ,  H04B5/00 ,  H03C1/08

Abstract: A device for managing operation of an object capable of contactless communication with a reader magnetically coupled to the object includes a modulator configured to modulate an impedance of a load connected across terminals of an antenna of the object during a transmission phase during which information is transmitted from the object to the reader. The device further includes a monitor configured to carry out a monitoring phase, prior to the transmission phase. The monitoring phase includes a test modulation of the impedance of the load, a monitoring of a level of amplitude modulation of a modulated test signal present at the antenna of the object and resulting from the test modulation, and a capacitive modification of the impedance of the load if this level is lower than a threshold.

公开(公告)号：US20160087681A1

公开(公告)日：2016-03-24

申请号：US14860188

申请日：2015-09-21

Applicant: STMicroelectronics International N.V

Inventor： Achraf Dhayni

IPC: H04B5/00 ,  H04L27/08 ,  H04B15/02

CPC classification number: H04B5/0031 ,  H04B5/0056 ,  H04B5/0068 ,  H04B15/02 ,  H04L27/08

Abstract: A system can be used for contactless communication of information between a first device and a second device, each having an antenna intended to be coupled via a near magnetic field. The first device includes a transmit chain having first circuitry configured to generate a digital data stream corresponding to the information to be transmitted, and second circuitry configured to generate a first amplitude-modulated and dithered signal in the antenna of the first device from this stream and from an application of a first dithering. The second device includes a receive chain having third circuitry configured to carry out a frequency transposition of a second amplitude-modulated and dithered signal originating from the first signal, with application of a second dithering synchronous with the first dithering.

Abstract translation: 系统可用于在第一设备和第二设备之间进行无接触的信息通信，每个设备具有旨在通过近场磁场耦合的天线。 所述第一设备包括具有第一电路的发射链，所述第一电路被配置为产生与要发射的信息相对应的数字数据流;以及第二电路，被配置为从所述流在所述第一设备的天线中产生第一幅度调制和抖动信号， 从第一次抖动的应用程序。 第二设备包括具有第三电路的接收链，该第三电路被配置为执行与第一抖动同步的第二抖动的来自第一信号的第二幅度调制和抖动信号的频率转置。

公开(公告)号：US10380474B2

公开(公告)日：2019-08-13

申请号：US14839673

申请日：2015-08-28

Applicant: STMicroelectronics International N.V.

Inventor： Achraf Dhayni

IPC: G06K7/00 ,  G06K19/07 ,  H04B5/00 ,  G06K19/073 ,  H03C1/08

Abstract: A method for managing the operation of an object capable of contactless communication with a reader magnetically coupled to the object includes a phase for transmission of information from the object to the reader and includes a modulation of the impedance of a load connected across the terminals of the antenna of the object. Prior to the transmission phase, a monitoring phase includes a monitoring of the level of amplitude modulation of a modulated test signal present at the antenna of the object and resulting from a test modulation of the impedance of the load and a capacitive modification of the impedance of the load if this level is lower than a threshold.

公开(公告)号：US09509373B2

公开(公告)日：2016-11-29

申请号：US14860188

申请日：2015-09-21

Applicant: STMicroelectronics International N.V

Inventor： Achraf Dhayni

IPC: H04B5/00 ,  H04B15/02 ,  H04L27/08

CPC classification number: H04B5/0031 ,  H04B5/0056 ,  H04B5/0068 ,  H04B15/02 ,  H04L27/08

Abstract: A system can be used for contactless communication of information between a first device and a second device, each having an antenna intended to be coupled via a near magnetic field. The first device includes a transmit chain having first circuitry configured to generate a digital data stream corresponding to the information to be transmitted, and second circuitry configured to generate a first amplitude-modulated and dithered signal in the antenna of the first device from this stream and from an application of a first dithering. The second device includes a receive chain having third circuitry configured to carry out a frequency transposition of a second amplitude-modulated and dithered signal originating from the first signal, with application of a second dithering synchronous with the first dithering.

Abstract translation: 系统可用于在第一设备和第二设备之间进行无接触的信息通信，每个设备具有旨在通过近场磁场耦合的天线。 所述第一设备包括具有第一电路的发射链，所述第一电路被配置为产生与要发射的信息相对应的数字数据流;以及第二电路，被配置为从所述流在所述第一设备的天线中产生第一幅度调制和抖动信号， 从第一个抖动的应用程序。 第二设备包括具有第三电路的接收链，该第三电路被配置为执行与第一抖动同步的第二抖动的来自第一信号的第二幅度调制和抖动信号的频率转置。

公开(公告)号：US09306630B2

公开(公告)日：2016-04-05

申请号：US14324512

申请日：2014-07-07

Applicant: STMicroelectronics International N.V.

Inventor： Achraf Dhayni

IPC: H04B5/00

CPC classification number: H04B5/0031 ,  H04B5/0068 ,  H04B5/0075

Abstract: A near field communication (NFC) initiator communicates with a target device. The carrier is modulated to transmit a digital signal. During time slots allocated for target communication, the field is load modulated by the target. The target load modulator is driven by a digital modulator to vary voltage at antenna terminals so that peak amplitude of the carrier varies for specified periods between high and low values. To alleviate interference in the target device caused by the generation of aliases during transition, the load modulator sequentially applies a range of resistances to vary the amplitude (voltage) during transition according to a specific waveform determined by the infinite impulse response of a low pass filter tuned to the cut of frequency and sampling frequency determined according to the coexistence and cohabitation specifications of a chip in which the NFC functionality is embedded.

Abstract translation: 近场通信（NFC）发起者与目标设备进行通信。 调制载波以发送数字信号。 在分配给目标通信的时隙中，该字段由目标进行负载调制。 目标负载调制器由数字调制器驱动以在天线端子处改变电压，使得载波的峰值幅度在高值和低值之间的指定时段内变化。 为了减轻在转换期间由于产生别名引起的目标装置中的干扰，负载调制器根据由低通滤波器的无限脉冲响应确定的特定波形顺序地施加一定范围的电阻以改变转换期间的幅度（电压） 调整到根据嵌入NFC功能的芯片的共存和同居规格确定的频率和采样频率。

公开(公告)号：US20150030107A1

公开(公告)日：2015-01-29

申请号：US14337406

申请日：2014-07-22

Applicant: STMicroelectronics International N.V.

Inventor： Achraf Dhayni ,  Hussein Hijazi

IPC: H04L1/00 ,  H04B7/04

CPC classification number: H04L1/0054 ,  H04B7/0413 ,  H04L1/0631 ,  H04L25/03197 ,  H04L25/03242 ,  H04L25/03961 ,  H04L2025/03414 ,  H04L2025/0342 ,  H04L2025/03426

Abstract: A receiver estimates a vector of emitted symbols over a MIMO transmission channel which are emitted by a emitting antennas. The receiver receives a vector of received symbols on receiving antennas. Estimation of the vector of emitted symbols is made by calculating a metric associated with a criterion for each vector of a subset of all possible vectors of emitted symbols and selecting an estimation for said vector of emitted symbol as the vector of emitted symbols among said subset which minimizes said metric.

Abstract translation: 接收机估计由发射天线发射的MIMO传输信道上发射码元的向量。 接收机在接收天线上接收接收符号的向量。 通过计算与发射符号的所有可能向量的子集的每个向量的标准相关联的度量来估计发射符号的矢量，并且将所发射的符号的所述向量的估计选择为所述子集中的发射符号的向量， 最小化所述度量。

公开(公告)号：US20150024682A1

公开(公告)日：2015-01-22

申请号：US14330505

申请日：2014-07-14

Applicant: STMicroelectronics International N.V.

Inventor： Achraf Dhayni

IPC: H04B5/00

CPC classification number: H04B5/0025 ,  H04W74/06

Abstract: In near field communication between an active initiator and a plurality of passive listening devices, the initiator device obtains a unique identity code from each listening device using an initialization process. The initiator transmits a poll request signal including a sequence of coupled data including an identification vector and an allocation vector. Each listening device stores an embedded introduction vector. In response to receive of the poll request signal, the listening device compares each received introduction vector with its stored embedded introduction vector. If a match is found, the listening device calculates a time slot for transmission of its poll response signal based on the coupled allocation vector with the matched introduction vector. The time slot calculated will not overlap with any other time slot so that bit level collisions in the poll response signals will be avoided.

Abstract translation: 在主动启动器和多个被动收听装置之间的近场通信中，发起者设备使用初始化过程从每个监听装置获得唯一的身份码。 启动器发送包括包括识别向量和分配向量的耦合数据序列的轮询请求信号。 每个听音装置存储嵌入的引入向量。 响应于轮询请求信号的接收，收听装置将每个接收到的引入向量与其存储的嵌入式引入向量进行比较。 如果发现匹配，则听音装置基于具有匹配引入向量的耦合分配向量来计算用于发送其轮询响应信号的时隙。 计算的时隙不会与任何其他时隙重叠，以便避免轮询响应信号中的位级别冲突。

公开(公告)号：US20150011161A1

公开(公告)日：2015-01-08

申请号：US14324512

申请日：2014-07-07

Applicant: STMicroelectronics International N.V.

Inventor： Achraf Dhayni

IPC: H04B5/00

CPC classification number: H04B5/0031 ,  H04B5/0068 ,  H04B5/0075

Abstract: A near field communication (NFC) initiator communicates with a target device. The carrier is modulated to transmit a digital signal. During time slots allocated for target communication, the field is load modulated by the target. The target load modulator is driven by a digital modulator to vary voltage at antenna terminals so that peak amplitude of the carrier varies for specified periods between high and low values. To alleviate interference in the target device caused by the generation of aliases during transition, the load modulator sequentially applies a range of resistances to vary the amplitude (voltage) during transition according to a specific waveform determined by the infinite impulse response of a low pass filter tuned to the cut of frequency and sampling frequency determined according to the coexistence and cohabitation specifications of a chip in which the NFC functionality is embedded.

Abstract translation: 近场通信（NFC）发起者与目标设备进行通信。 调制载波以发送数字信号。 在分配给目标通信的时隙中，该字段由目标进行负载调制。 目标负载调制器由数字调制器驱动以在天线端子处改变电压，使得载波的峰值幅度在高值和低值之间的指定时段内变化。 为了减轻在转换期间由于产生别名引起的目标装置中的干扰，负载调制器根据由低通滤波器的无限脉冲响应确定的特定波形顺序地施加一定范围的电阻以改变转换期间的幅度（电压） 调整到根据嵌入NFC功能的芯片的共存和同居规格确定的频率和采样频率。

公开(公告)号：US09654252B2

公开(公告)日：2017-05-16

申请号：US14931331

申请日：2015-11-03

Applicant: STMicroelectronics International N.V.

Inventor： Achraf Dhayni ,  Hussein Hijazi

IPC: H04B7/04 ,  H04L1/06 ,  H04L1/00 ,  H04L25/03 ,  H04B7/0413

CPC classification number: H04L1/0054 ,  H04B7/0413 ,  H04L1/0631 ,  H04L25/03197 ,  H04L25/03242 ,  H04L25/03961 ,  H04L2025/03414 ,  H04L2025/0342 ,  H04L2025/03426

Abstract: A receiver estimates a vector of emitted symbols over a MIMO transmission channel which is emitted by emitting antennas. The receiver receives a vector of received symbols on receiving antennas. Estimation of the vector of emitted symbols is made by calculating a metric associated with a criterion for each vector of a subset of all possible vectors of emitted symbols and selecting an estimation for said vector of emitted symbols as the vector of emitted symbols among said subset which minimizes said metric.

公开(公告)号：US09306627B2

公开(公告)日：2016-04-05

申请号：US14330505

申请日：2014-07-14

Applicant: STMicroelectronics International N.V.

Inventor： Achraf Dhayni

IPC: H04B5/00 ,  H04B7/00 ,  H04W74/06

CPC classification number: H04B5/0025 ,  H04W74/06

Abstract: In near field communication between an active initiator and a plurality of passive listening devices, the initiator device obtains a unique identity code from each listening device using an initialization process. The initiator transmits a poll request signal including a sequence of coupled data including an identification vector and an allocation vector. Each listening device stores an embedded introduction vector. In response to receive of the poll request signal, the listening device compares each received introduction vector with its stored embedded introduction vector. If a match is found, the listening device calculates a time slot for transmission of its poll response signal based on the coupled allocation vector with the matched introduction vector. The time slot calculated will not overlap with any other time slot so that bit level collisions in the poll response signals will be avoided.

Abstract translation: 在主动启动器和多个被动收听装置之间的近场通信中，发起者设备使用初始化过程从每个监听装置获得唯一的身份码。 启动器发送包括包括识别向量和分配向量的耦合数据序列的轮询请求信号。 每个听音装置存储嵌入的引入向量。 响应于轮询请求信号的接收，收听装置将每个接收到的引入向量与其存储的嵌入式引入向量进行比较。 如果发现匹配，则听音装置基于具有匹配引入向量的耦合分配向量来计算用于发送其轮询响应信号的时隙。 计算的时隙不会与任何其他时隙重叠，以便避免轮询响应信号中的位级别冲突。