公开(公告)号：US20160127158A1

公开(公告)日：2016-05-05

申请号：US14891454

申请日：2014-06-17

Applicant: ST-ERICSSON SA

Inventor： Kimmo KOLI

IPC: H04L25/49 ,  H04B7/06

CPC classification number: H04L25/4917 ,  H04B7/06 ,  H04L25/0272 ,  H04L25/0292

Abstract: A receiver for an N-wire digital interface, where N is any integer exceeding two, has N input terminals, a common node and N detection stages. Each of the N detection stages has a resistive element coupled between the common node and a respective one of the N input terminals, and a comparator having a first input coupled to the respective one of the N input terminals and a second input coupled to the common node.

Abstract translation: 用于N线数字接口的接收机，其中N是超过2的整数，具有N个输入端，公共节点和N个检测级。 N个检测级中的每一个具有耦合在公共节点和N个输入端子中的相应一个的电阻元件，以及比较器，具有耦合到N个输入端子中的相应一个的第一输入端和耦合到该公共端口的第二输入端 节点。

公开(公告)号：US20160126901A1

公开(公告)日：2016-05-05

申请号：US14769126

申请日：2014-03-20

Applicant: ST-ERICSSON SA

Inventor： Vincent KNOPIK

IPC: H03F1/02 ,  H03F3/193

CPC classification number: H03F1/0222 ,  H03F1/0266 ,  H03F1/223 ,  H03F3/19 ,  H03F3/193 ,  H03F3/245 ,  H03F2200/102 ,  H03F2200/108 ,  H03F2200/15 ,  H03F2200/18 ,  H03F2200/451

Abstract: An amplifier (100) comprises an input port (102) for receiving an input signal, an envelope port (104) for receiving an envelope signal indicative of an envelope of the input signal. The amplifier has a first transistor (M1) and a second transistor (M2). A first biasing circuit (120) is coupled to the envelope port (104) and is arranged to generate a first bias voltage dependent on the envelope signal. A summing stage (140) is coupled to the input port (102) for receiving the input signal, coupled to the first biasing circuit (120) for receiving the first bias voltage, coupled to a gate (g) of the first transistor (M1). A second biasing circuit (130) is coupled between the envelope port (104) and a gate (g 2) of the second transistor (M2), and is arranged to generate a second bias voltage dependent on the envelope signal.

Abstract translation: 放大器（100）包括用于接收输入信号的输入端口（102），用于接收指示输入信号的包络的包络信号的包络端口（104）。 放大器具有第一晶体管（M1）和第二晶体管（M2）。 第一偏置电路（120）耦合到封装端口（104）并且被布置成产生取决于包络信号的第一偏置电压。 加法级（140）耦合到输入端口（102），用于接收输入信号，耦合到第一偏置电路（120），用于接收第一偏置电压，耦合到第一晶体管（M1）的栅极 ）。 第二偏置电路（130）耦合在封装端口（104）和第二晶体管（M2）的栅极（g2）之间，并且被布置为产生取决于包络信号的第二偏置电压。

公开(公告)号：US09312891B2

公开(公告)日：2016-04-12

申请号：US14273654

申请日：2014-05-09

Applicant: ST-Ericsson SA

Inventor： Raihan Rafique

IPC: H04B1/04 ,  H04B15/06 ,  H04W24/06 ,  H04W88/02

CPC classification number: H04B1/0475 ,  H04B15/06 ,  H04W24/06 ,  H04W88/02

Abstract: A matrix for use with a radio transceiver having at least two signal sources is provided. The matrix comprises for each selected set of two or more signal sources, a list of combinations of harmonics of the signal sources, the combinations of harmonics each having a predicted amplitude greater than a predetermined threshold, and a frequency within a defined range related to a frequency range of one of the signal sources. Further, methods for generating such matrix and methods for avoiding spurs are provided.

Abstract translation: 提供了一种与具有至少两个信号源的无线电收发器一起使用的矩阵。 矩阵包括用于两个或更多个信号源的每个所选择的组，信号源的谐波的组合的列表，每个具有大于预定阈值的预测幅度的谐波的组合以及与定义的范围相关的频率 一个信号源的频率范围。 此外，提供了用于产生这种矩阵的方法和用于避免杂散的方法。

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。

公开(公告)号：US09292029B2

公开(公告)日：2016-03-22

申请号：US14379399

申请日：2013-02-26

Applicant: ST-Ericsson SA

Inventor： Germano Nicollini ,  Andrea Barbieri

IPC: G05F1/10 ,  G05F3/26 ,  G05F1/56 ,  H03H7/01

CPC classification number: G05F3/262 ,  G05F1/56 ,  G05F1/561 ,  G05F3/26 ,  H03H7/0161

Abstract: A low-noise reference voltages distribution circuit has a multi-output voltage-to-current converter configured to receive an input reference voltage and to provide a plurality of output reference currents to be converted into a plurality of local reference voltages by corresponding receiving circuits. The converter includes an input section, an output section and a low-pass filter. The input section generates a reference current based on the input reference voltage, and has a current mirror input transistor having a voltage controlled input terminal. The output section includes a plurality of current mirror output transistors outputting reference currents to the plurality of reference currents, respectively, and having a voltage controlled input terminal connected to a common input node. The low-pass filter has an input node connected to the voltage controlled input terminal of the current mirror input transistor and an output node connected to the common input node.

Abstract translation: 低噪声参考电压分配电路具有被配置为接收输入参考电压并且通过相应的接收电路提供多个输出参考电流以被转换成多个局部参考电压的多输出电压 - 电流转换器。 转换器包括输入部分，输出部分和低通滤波器。 输入部分基于输入参考电压生成参考电流，并且具有电压反射镜输入晶体管，其具有电压控制的输入端子。 输出部分包括分别向多个参考电流输出参考电流并且具有连接到公共输入节点的电压控制输入端的多个电流镜输出晶体管。 低通滤波器具有连接到电流镜输入晶体管的电压控制输入端的输入节点和连接到公共输入节点的输出节点。

公开(公告)号：US09281796B2

公开(公告)日：2016-03-08

申请号：US14729362

申请日：2015-06-03

Applicant: ST-Ericsson SA

Inventor： Patrick Reynaert ,  Shailesh Kulkarni ,  Dixian Zhao

IPC: H03H7/06 ,  H03H7/21 ,  H03H7/01

CPC classification number: H03H7/06 ,  H03H7/0138 ,  H03H7/21 ,  H03H2007/0192

Abstract: A two-stage, passive, RC polyphase filter for mm-wave quadrature LO generation is presented. The filter features an innovative, symmetrical layout structure, which is more robust to parasitics than the conventional layout. Layout parasitics which become important at mm-wave frequencies are identified and a compensated. Impedance variations and transfer functions are evaluated considering these dominant parasitics. More than 15 dB improvement in image rejection ratio is achieved in comparison with conventional layouts. Using the inventive techniques more than 35 dB of image rejection ratio over a bandwidth of 6 GHz is demonstrated in an outphasing transmitter at 60 GHz in 40 nm CMOS.

Abstract translation: 提出了一种用于毫米波正交LO生成的两级无源RC多相滤波器。 滤波器具有创新的对称布局结构，与传统布局相比，寄生效应更为鲁棒。 在mm波频率上变得重要的布局寄生效应被识别并得到补偿。 考虑到这些主要的寄生效应来评估阻抗变化和传递函数。 与传统布局相比，实现了超过15 dB的图像抑制比改善。 使用本发明的技术，在60GHz的40nm CMOS的外部发射机中证明了在6GHz的带宽上超过35dB的图像抑制比。

公开(公告)号：US09277315B2

公开(公告)日：2016-03-01

申请号：US14301115

申请日：2014-06-10

Applicant: ST-ERICSSON INDIA PVT. LTD. ,  ST-ERICSSON SA

Inventor： Sanjeev Ranganathan ,  Shyam Somayajula ,  Srinath Sridharan ,  Lionel Cimaz

IPC: H04R3/00 ,  G10K11/00

CPC classification number: H04R3/002 ,  G10K11/002 ,  H04R3/00 ,  H04R3/007

Abstract: Systems and methods for suppressing pop-up noise in an audio signal are disclosed. The system includes a driver circuit shared by a pin interface and a complementary pin interface. A control unit is coupled to the pin interface and the complementary pin interface. To activate the pin interface, the control unit is configured to first activate the driver output at the complementary pin interface. Once the complementary pin interface achieves a preset voltage, the driver output is switched to the pin interface by the control unit. In addition, the driver circuit can be calibrated for a DC offset on the complementary pin interface by re-using calibration data calculated at the pin interface. Further, DC correction signals can be provided from a pre-biasing circuit based on the calibration data of the driver circuit.

Abstract translation: 公开了用于抑制音频信号中的弹出噪声的系统和方法。 该系统包括由引脚接口和互补引脚接口共享的驱动器电路。 控制单元耦合到引脚接口和互补引脚接口。 要激活引脚接口，控制单元配置为首先在互补引脚接口处激活驱动器输出。 一旦互补引脚接口达到预设电压，驱动器输出就由控制单元切换到引脚接口。 此外，可以通过重新使用在引脚接口处计算出的校准数据，在互补引脚接口上校准驱动器电路的直流偏移。 此外，可以基于驱动器电路的校准数据从预偏置电路提供直流校正信号。

公开(公告)号：US20160050064A1

公开(公告)日：2016-02-18

申请号：US14776941

申请日：2013-04-17

Applicant: ST-ERICSSON SA

Inventor： Jian NIE ,  Jishui LI ,  Wei LIU

IPC: H04L7/00 ,  H04W88/06 ,  H04L7/02

CPC classification number: H04L7/0016 ,  H04L7/02 ,  H04L27/2657 ,  H04W88/06

Abstract: Handling a frequency error (FEQ) of a terminal which includes a plurality of modems using a same clock source includes: obtaining the FEQ, which is a difference between a carrier frequency of a received signal and a nominal frequency for each modem; obtaining a FEQ threshold of the received signal in a current service based on the FEQ; obtaining an adjusted value of the clock source corresponding to each modem based on the FEQ and the FEQ threshold; obtaining a synthesized adjusted value of the clock source based on the adjusted values of all the moderns; and adjusting the frequency of the clock source based on the synthesized adjusted value of the clock source. The FEQ of the mobile communication terminal can be quickly corrected by adjusting the clock source's frequency, and, by considering the FEQ of all the modems, the modems' performances may be balanced.

Abstract translation: 使用相同的时钟源处理包括多个调制解调器的终端的频率误差（FEQ）包括：获得FEQ，其是接收信号的载波频率和每个调制解调器的标称频率之间的差; 基于所述FEQ在当前服务中获得接收信号的FEQ阈值; 基于FEQ和FEQ阈值获得对应于每个调制解调器的时钟源的调整值; 基于所有现代人的调整值，获得时钟源的合成调整值; 并且基于时钟源的合成调整值来调整时钟源的频率。 可以通过调整时钟源的频率来快速校正移动通信终端的FEQ，并且通过考虑所有调制解调器的FEQ，可以平衡调制解调器的性能。

公开(公告)号：US09247491B2

公开(公告)日：2016-01-26

申请号：US14378752

申请日：2013-03-12

Applicant: ST-Ericsson SA

Inventor： Oskar Drugge ,  Koichi Kojima ,  Max Larsson ,  Torgny Palenius ,  Benny Stenlund

IPC: H04W48/16 ,  H04B1/7083 ,  H04B1/7087 ,  H04J11/00 ,  H04L27/26 ,  H04W56/00 ,  H04W88/08

CPC classification number: H04W48/16 ,  H04B1/7083 ,  H04B1/7087 ,  H04J11/0086 ,  H04L27/2657 ,  H04L27/2686 ,  H04W56/00 ,  H04W88/08

Abstract: A receiver 10 and method in the receiver for cell search to find an actual base station having a carrier frequency in a radio communications network 1. The receiver detects a first signal representative of a base station 12, 14, 16, 18 by performing slot synchronisation, frame synchronization, cell identification, measurement of a signal quality of the first signal and comparison of the measured signal quality with a first threshold value. When a first signal having a signal quality that is greater than the first threshold value has been detected, the receiver searches for at least one second signal representative of a base station for at least one frequency offset comprised in a set of offsets S3. Further, when one or more second signals are detected, the receiver selects the signal with the highest signal quality, and detects a broadcast radio channel representative of a base station for the selected signal.

Abstract translation: 用于小区搜索的接收机中的接收机10和方法，用于在无线电通信网络1中找到具有载波频率的实际基站。接收机通过执行时隙同步来检测代表基站12,14,16,18的第一信号 ，帧同步，小区识别，第一信号的信号质量的测量以及所测量的信号质量与第一阈值的比较。 当已经检测到具有大于第一阈值的信号质量的第一信号时，接收机针对包括在一组偏移量S3中的至少一个频率偏移量，搜索表示基站的至少一个第二信号。 此外，当检测到一个或多个第二信号时，接收机选择具有最高信号质量的信号，并且检测表示所选信号的基站的广播无线电信道。