公开(公告)号：US09191042B2

公开(公告)日：2015-11-17

申请号：US14030305

申请日：2013-09-18

Applicant: ST-Ericsson SA

Inventor： Achraf Dhayni

IPC: H04B14/06 ,  H04B1/10 ,  H04L27/26 ,  H04L25/02

CPC classification number: H04B1/10 ,  H04L25/0202 ,  H04L25/0204 ,  H04L25/0226 ,  H04L27/2647 ,  H04L27/2649 ,  H04L27/2691

Abstract: An interference cancellation technique is implemented in a receiver adapted for determining an estimation of interferences when receiving an OFDM signal made of packets. Each packet includes a first training field, a second training field, a first header field, a second header field and a data field. The receiver detects a first symbol value of the first header field, and a second symbol value of the second header field, the first and the second header fields having been modulated using different modulation schemes. The estimation of interferences is determined using the first and the second symbol values.

Abstract translation: 在接收适合于在接收由分组​​构成的OFDM信号时确定干扰估计的接收机中实现干扰消除技术。 每个分组包括第一训练场，第二训练场，第一报头字段，第二报头字段和数据字段。 接收机检测第一报头字段的第一符号值和第二报头字段的第二符号值，第一和第二报头字段已经使用不同的调制方案进行了调制。 使用第一和第二符号值确定干扰的估计。

公开(公告)号：US20150207656A1

公开(公告)日：2015-07-23

申请号：US14420791

申请日：2013-09-03

Applicant: ST-Ericsson SA

Inventor： Achraf Dhayni

IPC: H04L27/26

CPC classification number: H04L27/2623 ,  H04L27/2624

Abstract: An emitter for modulating and emitting an orthogonal frequency division multiplexing signal through a transmission channel (TC), comprising a frequency-to-time converter for converting symbols to be transmitted into time symbols, and means for serializing and amplifying said time symbol so as to emit it as an OFDM signal through said transmission channel, said emitter further comprising: means (12) for clipping said time symbols; time-to-frequency convertor (13) for converting said time symbols; and means for applying a set of data subcarriers of the outputs of said time-to-frequency converter as inputs of said frequency-to-time converter wherein out-of-band subcarriers are set to zero and the clipping level is set to a minimum level allowing the amplifier to operate in an efficient region.

Abstract translation: 一种用于通过传输信道（TC）调制和发射正交频分复用信号的发射器，包括用于将要发送的符号转换为时间符号的频率 - 时间转换器，以及用于串行化和放大所述时间符号的装置，以便 通过所述传输信道将其发射为OFDM信号，所述发射器还包括：用于剪切所述时间符号的装置（12）; 时间 - 频率转换器（13），用于转换所述时间符号; 以及用于将所述时间 - 频率转换器的输出的一组数据子载波应用于所述频率 - 时间转换器的输入的装置，其中带外子载波被设置为零，并且限幅电平被设置为最小 电平允许放大器在有效的区域中工作。

公开(公告)号：US20140092946A1

公开(公告)日：2014-04-03

申请号：US13629993

申请日：2012-09-28

Applicant: ST-ERICSSON SA

Inventor： Achraf Dhayni ,  Jeroen Kuenen

IPC: H04B17/00

CPC classification number: H04B17/004 ,  H04B17/0085 ,  H04B17/20 ,  H04B17/29

Abstract: A built-in receiver self-test system provides on-chip testing with minimal change to the receiver footprint. The system digitally generates a two-tone test signal, and tests the nonlinearities of the receiver using the generated two-tone test signal. To that end, the self-test system comprises a stimulus generator, a downconverter, and a demodulator, all of which are disposed on a common receiver chip. The stimulus generator generates a test signal comprising first and second tones at respective first and second frequencies, where the first and second frequencies are spaced by an offset frequency, and where the first frequency comprises a non-integer multiple of the offset frequency. The downcoverter downconverts the test signal to generate an In-phase component and a Quadrature component. The demodulator measures an amplitude of the intermodulation tone by demodulating the In-phase and Quadrature components based on a reference frequency.

Abstract translation: 内置的接收机自检系统提供片上测试，对接收机的占位面积进行最小的改变。 该系统数字地产生双音测试信号，并使用生成的双音测试信号测试接收机的非线性。 为此，自检系统包括一个刺激发生器，一个下变频器和一个解调器，所有这些都设置在公共的接收芯片上。 刺激发生器产生测试信号，该测试信号包括相应的第一和第二频率处的第一和第二音调，其中第一和第二频率间隔偏移频率，并且其中第一频率包括偏移频率的非整数倍。 下变频器将测试信号下变频以产生同相分量和正交分量。 解调器通过基于参考频率解调同相和正交分量来测量互调音的幅度。

公开(公告)号：US09467238B2

公开(公告)日：2016-10-11

申请号：US14426763

申请日：2013-09-12

Applicant: ST-Ericsson SA

Inventor： Achraf Dhayni

IPC: H04B5/00 ,  H04B17/21 ,  G01R31/317 ,  H04B17/14 ,  H04B17/345 ,  H04W4/00 ,  H04W24/02

CPC classification number: H04B17/21 ,  G01R31/31716 ,  H04B5/0056 ,  H04B17/14 ,  H04B17/345 ,  H04W4/80 ,  H04W24/02

Abstract: A method of determining a calibration of a near field communication, NFC, device, the NFC device comprising a receiver circuit, a transmitter circuit and a load modulator circuit, the method comprising: generating a carrier signal in the transmitter circuit, generating a modulation signal in the load modulator circuit, generating a modulated carrier signal, comprising first and second frequencies, by applying the modulation signal to the carrier signal, applying the modulated carrier signal at an input of the receiver circuit, and determining a response parameter of the receiver circuit on the basis of the response of the receiver circuit to the first and second frequencies in the modulated carrier signal.

Abstract translation: 一种确定近场通信NFC装置的NFC装置的方法，所述NFC装置包括接收机电路，发射机电路和负载调制器电路，所述方法包括：在所述发射机电路中产生载波信号，产生调制信号 在所述负载调制器电路中，通过将所述调制信号施加到所述载波信号来产生包括第一和第二频率的调制载波信号，在所述接收机电路的输入处应用所述调制载波信号，以及确定所述接收机电路的响应参数 基于接收机电路对调制载波信号中的第一和第二频率的响应。

公开(公告)号：US09455859B2

公开(公告)日：2016-09-27

申请号：US14420791

申请日：2013-09-03

Applicant: ST-Ericsson SA

Inventor： Achraf Dhayni

IPC: H04K1/10 ,  H04L27/26

CPC classification number: H04L27/2623 ,  H04L27/2624

Abstract: An emitter for modulating and emitting an orthogonal frequency division multiplexing signal through a transmission channel (TC), comprising a frequency-to-time converter for converting symbols to be transmitted into time symbols, and means for serializing and amplifying said time symbol so as to emit it as an OFDM signal through said transmission channel, said emitter further comprising: means (12) for clipping said time symbols; time-to-frequency convertor (13) for converting said time symbols; and means for applying a set of data subcarriers of the outputs of said time-to-frequency converter as inputs of said frequency-to-time converter wherein out-of-band subcarriers are set to zero and the clipping level is set to a minimum level allowing the amplifier to operate in an efficient region.

Abstract translation: 一种用于通过传输信道（TC）调制和发射正交频分复用信号的发射器，包括用于将要发送的符号转换为时间符号的频率 - 时间转换器，以及用于串行化和放大所述时间符号的装置，以便 通过所述传输信道将其发射为OFDM信号，所述发射器还包括：用于剪切所述时间符号的装置（12）; 时间 - 频率转换器（13），用于转换所述时间符号; 以及用于将所述时间 - 频率转换器的输出的一组数据子载波应用于所述频率 - 时间转换器的输入的装置，其中带外子载波被设置为零，并且限幅电平被设置为最小 电平允许放大器在有效的区域中工作。

公开(公告)号：US09425907B2

公开(公告)日：2016-08-23

申请号：US14433893

申请日：2013-11-07

Applicant: ST-Ericsson SA

Inventor： Achraf Dhayni ,  Christophe Arnal

IPC: H04B5/00 ,  H04B17/20 ,  H04L1/24 ,  H04B17/14 ,  H04B17/15 ,  H04B17/19 ,  H04B17/29 ,  H04B17/40

CPC classification number: H04B17/20 ,  H04B5/0031 ,  H04B17/14 ,  H04B17/15 ,  H04B17/19 ,  H04B17/29 ,  H04B17/408 ,  H04L1/243

Abstract: A method of self-test for a near-field communication (NFC) radio frequency (RF) front-end unit comprising one antenna driver and at least one unit from a group comprising one reader and one card emulator, the RF front-end unit being connected to a digital front-end unit, wherein the antenna driver and the unit are interconnected through a first connection line via their respective first input-output interface and are also interconnected through a second connection line via their respective second input-output interface, the digital front-end unit being connected to the second connection line, the method comprising: activating the antenna driver and the unit based on control signals; —generating a first signal onto the first connection line by modulating a respective first bitstream; —retrieving a second bitstream from the second connection line, by demodulating the first signal; and, —determining an outcome of the self-test by monitoring the demodulated signal.

Abstract translation: 一种用于近场通信（NFC）射频（RF）前端单元的自检的方法，包括一个天线驱动器和来自包括一个读取器和一个卡仿真器的组中的至少一个单元，所述RF前端单元 连接到数字前端单元，其中所述天线驱动器和所述单元经由其相应的第一输入 - 输出接口通过第一连接线互连，并且还经由其相应的第二输入 - 输出接口通过第二连接线互连， 所述数字前端单元连接到所述第二连接线，所述方法包括：基于控制信号激活所述天线驱动器和所述单元; - 通过调制相应的第一比特流来产生第一信号到第一连接线上; 通过解调第一信号，从第二连接线恢复第二比特流; 并且通过监视解调信号来确定自检的结果。

公开(公告)号：US09413580B2

公开(公告)日：2016-08-09

申请号：US14427816

申请日：2013-09-17

Applicant: ST-Ericsson SA

Inventor： Achraf Dhayni

IPC: H04L7/00 ,  H04L27/26 ,  H04L25/03

CPC classification number: H04L27/2665 ,  H04L25/03159 ,  H04L27/2662 ,  H04L27/2672 ,  H04L27/2675 ,  H04L27/2682 ,  H04L2025/03414

Abstract: Receiver (RCV) adapted for compensating for Symbol Timing Offset when receiving OFDM symbols, over a communication channel (TC), comprising: means (REG, DFT, CMP) for detecting a first phase with no Inter-Symbol Interference, means (REG, DFT, CMP) for detecting a second phase with presence of Inter-Symbol Interference, means (REG, DFT, CMP) for compensating for said Symbol Timing Offset by estimating starting points of said received OFDM symbols as being one sample before the start of said second phase. The timing synchronization is achieved in frequency domain by monitoring amplitude variation of the demodulated subcarriers symbols, said variation being due to the presence of Inter Symbol Interference when the FFT window overlaps with the subsequent OFDM symbol.

Abstract translation: 用于在通信信道（TC）上接收OFDM符号时补偿符号定时偏移的接收机（RCV），包括：用于检测没有符号间干扰的第一相位的装置（REG，DFT，CMP），装置（REG， DFT，CMP），用于通过存在符号间干扰来检测第二相位，用于通过将所述接收的OFDM符号的起始点估计为所述接收的OFDM符号开始之前的一个样本来补偿所述符号定时偏移的装置（REG，DFT，CMP） 第二阶段 通过监视解调的副载波符号的幅度变化，在频域中实现定时同步，所述变化是由于当FFT窗口与随后的OFDM符号重叠时存在帧间干扰。

公开(公告)号：US09379784B2

公开(公告)日：2016-06-28

申请号：US14395249

申请日：2013-04-23

Applicant: ST-Ericsson SA

Inventor： Achraf Dhayni

IPC: H04B5/00 ,  G06K7/10 ,  G06K7/00

CPC classification number: H04B5/0062 ,  G06K7/0008 ,  G06K7/10237 ,  H04B5/0075

Abstract: A method for performing electromagnetic induction communication enables transmitting modulation data between communication devices. The method includes coupling a first antenna of a first communication device and a second antenna of a second communication device, generating a magnetic field by supplying a first current through the first antenna, and modulating the magnetic field according to the modulation data. The first current is regulated so as to be substantially constant, by introducing a regulating current, which is function of the magnetic field. The first communication device determines the modulation data from the regulating current.

Abstract translation: 用于执行电磁感应通信的方法使得能够在通信设备之间传送调制数据。 该方法包括：耦合第一通信设备的第一天线和第二通信设备的第二天线，通过提供通过第一天线的第一电流产生磁场，以及根据调制数据调制磁场。 通过引入作为磁场的功能的调节电流，将第一电流调节为基本恒定。 第一通信设备从调节电流确定调制数据。

公开(公告)号：US20150180595A1

公开(公告)日：2015-06-25

申请号：US14419298

申请日：2013-07-31

Applicant: ST-Ericsson SA

Inventor： Achraf Dhayni

IPC: H04B17/19 ,  H04B17/14 ,  H04B17/17 ,  H04J11/00

CPC classification number: H04B17/19 ,  G01R31/3187 ,  H04B17/14 ,  H04B17/15 ,  H04B17/17 ,  H04B17/18 ,  H04J4/005 ,  H04J11/00 ,  H04L7/02

Abstract: OFDM communication transceiver having a receiver chain and an emitting chain, adapted to test its connection with an antenna circuit unit (11), the receiver chain comprising a time-to-frequency transform unit (15) and the emitting chain comprising a frequency-to-time transform unit (6), and the transceiver further comprising:—Means for disconnecting the receiver chain to the antenna circuit unit (11);—Means for providing a stimulus as input to the emitting chain;—Means (22, 23) for reintroducing the signal at the output of the emitting chain as an input of the receiving chain;—Means (24) for determining a Circuit resonance frequency, Fr, and a quality factor, Q, of a transfer function computed from the output of the time-to-frequency transform unit (15);—Means for deciding (25, 26) about the connection of said antenna circuit unit (11) according to these resonance frequency and quality factor.

Abstract translation: OFDM通信收发器具有接收机链和发射链，适于测试其与天线电路单元（11）的连接，所述接收机链包括时间 - 频率变换单元（15），并且所述发射链包括频率 - - 时间变换单元（6），并且所述收发机还包括： - 用于将所述接收器链与所述天线电路单元（11）断开的装置; - 用于向所述发射链提供作为输入的刺激的装置; - 平均值（22,23） 用于在发射链的输出处重新引入作为接收链的输入的信号; - 用于确定从所述接收链的输出计算的传递函数的电路谐振频率Fr和质量因子Q的平均值（24） 时间 - 频率变换单元（15）; - 根据这些谐振频率和品质因数决定（25,26）关于所述天线电路单元（11）的连接的装置。

公开(公告)号：US20150180546A1

公开(公告)日：2015-06-25

申请号：US14416682

申请日：2013-06-27

Applicant: ST-Ericsson SA

Inventor： Achraf Dhayni

IPC: H04B5/00

CPC classification number: H04B5/0031 ,  G06K7/10019 ,  G06K7/10237 ,  H04B5/0062

Abstract: It is provided an electronic device (70) comprising a communication module (72) adapted to receive signals sent by an NFC reader (90) and adapted to send signals addressed to the NFC reader. The device also comprises a detector (74) coupled to the communication module and adapted to detect load-modulated signals among received signals. The detector is also adapted to prevent the communication module from sending a signal when the detector detects a load-modulated signal. The electronic device improves the field of near field communication.

Abstract translation: 提供了一种电子设备（70），包括适于接收由NFC读取器（90）发送并适于发送寻址到NFC读取器的信号的通信模块（72）。 该装置还包括耦合到通信模块并适于检测接收信号中的负载调制信号的检测器（74）。 当检测器检测到负载调制信号时，检测器还适于防止通信模块发送信号。 电子设备改进了近场通信领域。