公开(公告)号：US08879611B2

公开(公告)日：2014-11-04

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：US09306631B2

公开(公告)日：2016-04-05

申请号：US14443680

申请日：2013-11-21

Applicant: ST-Ericsson SA

Inventor： Achraf Dhayni

IPC: H04B5/00 ,  H04W4/00

CPC classification number: H04B5/0031 ,  H04B5/0081 ,  H04W4/80

Abstract: A method of conditioning a first signal transmitted between a first and a second near field communication, NFC, device, the method comprising: determining a transfer function representative of a distortion arising from transfer of a signal from the first NFC device to the second NFC device; determining a pre-distortion function from the transfer function; and applying the pre-distortion function to the first signal, wherein the pre-distortion function at least partially compensates for the determined transfer function.

Abstract translation: 一种调节在第一和第二近场通信NFC装置之间传输的第一信号的方法，所述方法包括：确定代表从第一NFC设备传送到第二NFC设备的信号所产生的失真的传递函数 ; 从传递函数确定预失真函数; 以及将所述预失真函数应用于所述第一信号，其中所述预失真函数至少部分地补偿所确定的传递函数。

公开(公告)号：US20150229497A1

公开(公告)日：2015-08-13

申请号：US14423757

申请日：2013-09-10

Applicant: ST-Ericsson SA

Inventor： Achraf Dhayni

IPC: H04L25/03 ,  H03D3/00

CPC classification number: H04L25/03159 ,  H03D3/009 ,  H04L27/364 ,  H04L27/3863 ,  H04L2025/03414

Abstract: A transceiver for orthogonal frequency division multiplex communication has a transmitter module (1) and a receiver module (2). The transmitter (1) has an l-path (3) and a Q-path (4) to receive signals on a number of subcarriers provided by a signal generator (9). The receiver module (2) has a receiver l-path (7) and a receiver Q-path (8) to deliver signals to a processor (15). IQ imbalance is calculated for each of the transmitter and receiver by the signal generator sending a sample signal (Xl(k), XQ(k)) over a one of the transmitter paths. The signal is then applied to one or each of the inputs to the receiver paths (7,8) to generate receiver output signals Yl(k), YQ(k), RQ(k). The processor (15) is responsive to the output signals to calculate the transmitter and receiver IQ imbalance for that subcarrier. A calibrator (19) and compensator (20) are responsive to the calculated IQ imbalance to correct or compensate each subcarrier of the transceiver band.

Abstract translation: 用于正交频分复用通信的收发机具有发射机模块（1）和接收机模块（2）。 发射机（1）具有1路径（3）和Q路径（4），以在由信号发生器（9）提供的多个子载波上接收信号。 接收器模块（2）具有接收器1路径（7）和用于将信号传送到处理器（15）的接收器Q路径（8）。 通过信号发生器通过发送器路径之一发送采样信号（X1（k），XQ（k）），为每个发射机和接收机计算IQ不平衡。 然后将信号施加到接收机路径（7,8）的一个或每个输入以产生接收机输出信号Y1（k），YQ（k），RQ（k）。 处理器（15）响应于输出信号来计算该子载波的发射机和接收机IQ不平衡。 校准器（19）和补偿器（20）响应于所计算的IQ不平衡来校正或补偿收发器频带的每个子载波。

公开(公告)号：US20150188745A1

公开(公告)日：2015-07-02

申请号：US14416661

申请日：2013-07-23

Applicant: ST-Ericsson SA

Inventor： Achraf Dhayni

IPC: H04L27/26 ,  H04B7/04 ,  H04B17/10

CPC classification number: H04L27/2657 ,  H04B7/0413 ,  H04B17/104 ,  H04L27/2627 ,  H04L27/2655

Abstract: Receiver (RCV) adapted for determining an estimation of a Sampling Frequency Offset an OFDM signal received from an emitter EMT over a transmission channel (TC), this signal being constituted of symbols; said receiver comprising means for: —receiving symbols from said emitter through a first path of said transmission channel; —receiving these symbols from said emitter through a second path of the transmission channel; this second path having a different ratio between the durations of a total OFDM symbol and a useful data portion of it; —determining the estimation according to received symbols through the first and second paths.

Abstract translation: 接收机（RCV），用于确定从发射机EMT通过传输信道（TC）接收的OFDM信号的采样频率偏移的估计，该信号由符号构成; 所述接收机包括： - 通过所述传输信道的第一路径从所述发射机接收符号; - 通过传输通道的第二路径从所述发射器接收这些符号; 该第二路径在总OFDM符号的持续时间与其有用数据部分之间具有不同的比率; - 通过第一和第二路径确定根据接收到的符号的估计。

公开(公告)号：US09577769B2

公开(公告)日：2017-02-21

申请号：US14419298

申请日：2013-07-31

Applicant: ST-Ericsson SA

Inventor： Achraf Dhayni

IPC: H04B3/00 ,  H04B7/216 ,  H04B17/19 ,  H04J4/00 ,  H04L7/02 ,  H04B17/14 ,  H04J11/00 ,  H04B17/15 ,  G01R31/3187 ,  H04B17/17 ,  H04B17/18

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

Abstract: An OFDM communication transceiver, which is configured to test its connection with an antenna circuit unit, has a receiver chain and an emitting chain. The receiver chain includes a time-to-frequency transform unit and the emitting chain includes a frequency-to-time transform unit. The transceiver further includes means for disconnecting the receiver chain to the antenna circuit unit, means for providing a stimulus as input to the emitting chain, means for reintroducing the signal at the output of the emitting chain as an input of the receiving chain, means 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, and means for deciding about the connection of said antenna circuit unit according to the resonance frequency and the quality factor.

Abstract translation: 被配置为测试其与天线电路单元的连接的OFDM通信收发器具有接收器链和发射链。 接收器链包括时间 - 频率变换单元，并且发射链包括频率 - 时间变换单元。 收发器还包括用于将接收机链与天线电路单元断开的装置，用于提供作为发射链的输入的刺激的装置，用于在发射链的输出处重新引入信号作为接收链的输入的装置， 确定从时间 - 频率变换单元的输出计算的传递函数的电路谐振频率Fr和质量因子Q以及用于根据谐振频率决定所述天线电路单元的连接的装置 和品质因素。

公开(公告)号：US09344302B2

公开(公告)日：2016-05-17

申请号：US14423757

申请日：2013-09-10

Applicant: ST-Ericsson SA

Inventor： Achraf Dhayni

IPC: H04L25/03 ,  H03D3/00 ,  H04L27/36 ,  H04L27/38

CPC classification number: H04L25/03159 ,  H03D3/009 ,  H04L27/364 ,  H04L27/3863 ,  H04L2025/03414

Abstract: A transceiver for orthogonal frequency division multiplex communication has a transmitter module (1) and a receiver module (2). The transmitter (1) has an l-path (3) and a Q-path (4) to receive signals on a number of subcarriers provided by a signal generator (9). The receiver module (2) has a receiver l-path (7) and a receiver Q-path (8) to deliver signals to a processor (15). IQ imbalance is calculated for each of the transmitter and receiver by the signal generator sending a sample signal (Xl(k), XQ(k)) over a one of the transmitter paths. The signal is then applied to one or each of the inputs to the receiver paths (7,8) to generate receiver output signals Yl(k), YQ(k), RQ(k). The processor (15) is responsive to the output signals to calculate the transmitter and receiver IQ imbalance for that subcarrier. A calibrator (19) and compensator (20) are responsive to the calculated IQ imbalance to correct or compensate each subcarrier of the transceiver band.

Abstract translation: 用于正交频分复用通信的收发机具有发射机模块（1）和接收机模块（2）。 发射机（1）具有1路径（3）和Q路径（4），以在由信号发生器（9）提供的多个子载波上接收信号。 接收器模块（2）具有接收器1路径（7）和用于将信号传送到处理器（15）的接收器Q路径（8）。 通过信号发生器通过发送器路径之一发送采样信号（X1（k），XQ（k）），为每个发射机和接收机计算IQ不平衡。 然后将信号施加到接收器路径（7,8）的一个或每个输入以产生接收机输出信号Y1（k），YQ（k），RQ（k）。 处理器（15）响应于输出信号来计算该子载波的发射机和接收机IQ不平衡。 校准器（19）和补偿器（20）响应于所计算的IQ不平衡来校正或补偿收发器频带的每个子载波。

公开(公告)号：US20150270912A1

公开(公告)日：2015-09-24

申请号：US14433893

申请日：2013-11-07

Applicant: ST-ERICSSON SA

Inventor： Achraf Dhayni ,  Christophe Arnal

IPC: H04B17/20 ,  H04B5/00

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位流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检索第二比特流; 以及通过监视解调信号来确定自检的结果。

公开(公告)号：US20150249510A1

公开(公告)日：2015-09-03

申请号：US14426763

申请日：2013-09-12

Applicant: ST-ERICSSON SA

Inventor： Achraf Dhayni

IPC: H04B17/21 ,  H04W24/02 ,  H04W4/00

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：US09306789B2

公开(公告)日：2016-04-05

申请号：US14428022

申请日：2013-10-10

Applicant: ST-Ericsson SA

Inventor： Achraf Dhayni

IPC: H04L27/06 ,  H04L27/26

CPC classification number: H04L27/2662 ,  H04L27/2657 ,  H04L27/2672

Abstract: It is proposed a method for receiving and demodulating an orthogonal frequency division multiplexing signal received through a transmission channel (TC) by a receiver (RCV), comprising demultiplexing said signal to generate time symbols (yl(n)) and performing a time-to-frequency conversion of these time symbols to generate frequency bins (Yl(k)) corresponding to received symbols, the received symbols comprising preamble symbols. The method comprises: Determining an estimated carrier frequency offset on the basis of frequency bins corresponding to used subcarriers of the preamble symbols; Applying said estimated carrier frequency offset to the time symbols so as to correct the carrier frequency of these received symbols.

Abstract translation: 提出了一种接收和解调由接收机（RCV）通过传输信道（TC）接收的正交频分复用信号的方法，包括解复用所述信号以产生时间符号（yl（n）），并执行时间到 这些时间符号的频率转换以产生与接收符号相对应的频率仓（Y1（k）），所接收的符号包括前导码符号。 该方法包括：基于与所述前导码符号的所使用的子载波相对应的频率块来确定估计的载波频率偏移; 将所述估计的载波频率偏移应用于时间符号，以便校正这些接收符号的载波频率。

公开(公告)号：US09306788B2

公开(公告)日：2016-04-05

申请号：US14416661

申请日：2013-07-23

Applicant: ST-Ericsson SA

Inventor： Achraf Dhayni

IPC: H04L27/06 ,  H04L27/26 ,  H04B17/10 ,  H04B7/04

CPC classification number: H04L27/2657 ,  H04B7/0413 ,  H04B17/104 ,  H04L27/2627 ,  H04L27/2655

Abstract: A receiver is configured to determine an estimation of a Sampling Frequency Offset an OFDM signal received from an emitter over a transmission channel. The received OFDM signal is constituted of symbols. The receiver receives symbols from the emitter through a first path of said transmission channel, and receives the symbols from the emitter through a second path of the transmission channel. On the second path, the symbols are characterized by a different ratio between a first duration of a total OFDM symbol and a second duration of useful data portion of the OFDM symbol, than on the first path. The receiver determines the estimation according to received symbols through the first and second paths.

Abstract translation: 接收机被配置为确定通过传输信道从发射器接收的OFDM信号的采样频率偏移的估计。 所接收的OFDM信号由符号构成。 接收机通过所述传输信道的第一路径从发射器接收符号，并且通过传输信道的第二路径从发射器接收符号。 在第二路径上，符号的特征在于总OFDM符号的第一持续时间与OFDM符号的有用数据部分的第二持续时间之间的比率与第一路径上的不同比率。 接收机根据接收的符号通过第一和第二路径确定估计。