公开(公告)号：US20140091842A1

公开(公告)日：2014-04-03

申请号：US13631421

申请日：2012-09-28

Applicant: BROADCOM CORPORATION

Inventor： Rami Mehio ,  Masoud Kahrizi ,  Cobus de Beer ,  Michael Buyanin

IPC: H03L7/08

CPC classification number: H03L7/18 ,  H03J7/045 ,  H03J7/065 ,  H03J2200/10

Abstract: A technique to provide hybrid compensation to correct for drifts in a reference frequency output from a digitally-controlled crystal oscillator (DCXO). A first compensation is provided to the DCXO to adjust for overlap or discontinuity of the reference frequency caused by switching capacitors in the capacitor array that controls drift of the reference frequency output. The second compensation is obtained at a phase-locked loop (PLL) that receives the reference frequency signal from the DCXO. The second compensation adjusts the PLL to adjust for variations of the reference frequency that remain after performing compensation in the DCXO.

Abstract translation: 提供混合补偿以校正数字控制晶体振荡器（DCXO）的参考频率输出中的漂移的技术。 向DCXO提供第一补偿，以调整由控制参考频率输出漂移的电容器阵列中的开关电容引起的参考频率的重叠或不连续性。 在从DCXO接收参考频率信号的锁相环（PLL）获得第二补偿。 第二个补偿调整PLL，以调整在DCXO中执行补偿后剩余的参考频率的变化。

公开(公告)号：US20160381632A1

公开(公告)日：2016-12-29

申请号：US14804194

申请日：2015-07-20

Applicant: BROADCOM CORPORATION

Inventor： Alex Ahmad MIRZAEI ,  Hooman Darabi ,  Masoud Kahrizi ,  Behnam Mohammadi

IPC: H04W52/02 ,  H04B1/04

CPC classification number: H04W52/028 ,  H03F1/02 ,  H03F1/34 ,  H03F3/24 ,  H04B2001/0433 ,  H04B2001/045 ,  Y02D70/00 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146

Abstract: A programmable transmitter circuit may be coupled to a controller circuit. The controller circuit may be configured to generate control signals based at least on a signal. The transmitter circuit may include a plurality of unit cells. Each unit cell may include a respective first current source and a respective second current source. Each unit cell may be configured to be set in an activated state or a deactivated state based at least on the control signals. For a unit cell of the plurality of unit cells, when the unit cell is set in the activated state, the respective first current source or the respective second current source may be configured to generate a current to be applied to a load.

Abstract translation: 可编程发射机电路可以耦合到控制器电路。 控制器电路可以被配置为至少基于信号产生控制信号。 发射机电路可以包括多个单元电池。 每个单位单元可以包括相应的第一电流源和相应的第二电流源。 每个单位单元可以被配置为至少基于控制信号被设置为激活状态或去激活状态。 对于多个单位单元的单位单元，当单位单元设置为激活状态时，各个第一电流源或相应的第二电流源可以被配置为产生要施加到负载的电流。

公开(公告)号：US09287901B2

公开(公告)日：2016-03-15

申请号：US14066830

申请日：2013-10-30

Applicant: BROADCOM CORPORATION

Inventor： Amir Hadji-Abdolhamid ,  Bernd Pregardier ,  Masoud Kahrizi

IPC: H04B1/16 ,  H04B1/00

CPC classification number: H04B1/0067 ,  H04B1/0057 ,  H04B1/16 ,  H04W88/06

Abstract: A single hybrid receiver is provided for processing both single carrier and carrier aggregated (CA) communications signals where carriers are split into independent receive paths without any additional external components. The receiver receives all contiguous and non-contiguous intra-band CA and inter-band CA signals allowing for improved rejection and balanced rejection of jamming signals on either side of the two carrier signals.

Abstract translation: 提供单个混合接收机用于处理单载波和载波聚合（CA）通信信号，其中载波被分成独立的接收路径而没有任何附加的外部分量。 接收机接收所有连续和不连续的带内CA和带间CA信号，允许在两个载波信号的任一侧改善抑制和平衡抑制干扰信号。

公开(公告)号：US20150063496A1

公开(公告)日：2015-03-05

申请号：US14015011

申请日：2013-08-30

Applicant: BROADCOM CORPORATION

Inventor： Nooshin Doctor Vakilian ,  Masoud Kahrizi ,  Alireza Tarighat Mehrabani

IPC: H04L27/26 ,  H04L25/03

CPC classification number: H04L27/2649 ,  H04L25/03993 ,  H04L27/2634

Abstract: A receiver includes a radio frequency (RF) front end receives a received signal that is modulated via orthogonal frequency division multiplexing (OFDM) and generates a downconverted signal, based on the received signal. An OFDM demodulator generates subcarrier data based on the downconverted signal. The subcarrier data corresponds to a plurality of subcarriers. A subcarrier weighting module generates weighted subcarrier data by applying subcarrier weights to the subcarrier data corresponding to selected ones of the plurality of subcarriers. An OFDM decoder generates decoded OFDM data based on the weighted subcarrier data.

Abstract translation: 接收机包括射频（RF）前端接收经由正交频分复用（OFDM）调制的接收信号，并根据接收到的信号产生下变频信号。 OFDM解调器基于下变频信号生成副载波数据。 子载波数据对应于多个子载波。 子载波加权模块通过对与多个子载波中的选定子载波相对应的子载波数据应用子载波权重来生成加权子载波数据。 OFDM解码器基于加权子载波数据生成解码的OFDM数据。

公开(公告)号：US20140355526A1

公开(公告)日：2014-12-04

申请号：US13919868

申请日：2013-06-17

Applicant: Broadcom Corporation

Inventor： Masoud Kahrizi ,  Bernd Pregardier ,  John Cumming Leete

IPC: H04W72/04

CPC classification number: H04L5/00 ,  H04J1/10 ,  H04L5/001 ,  H04L27/00

Abstract: Various configurations and arrangements of systems and methods for providing multi-carrier aggregation are described. A system in accordance with the disclosure can include a first mixer configured to receive a first signal in a first frequency band, a second mixer configured to receive a second signal in a second frequency band, a third mixer configured to receive the second signal in the second frequency band, and a fourth mixer configured to receive a third signal in a third frequency band. The system can further include a controller configured to selectively activate one of the first mixer and the second mixer, and selectively activate one of the third mixer and the fourth mixer.

Abstract translation: 描述了用于提供多载波聚合的系统和方法的各种配置和布置。 根据本公开的系统可以包括配置为在第一频带中接收第一信号的第一混频器，被配置为在第二频带中接收第二信号的第二混频器，被配置为在第二频带中接收第二信号的第三混频器 以及配置成在第三频带中接收第三信号的第四混频器。 该系统还可以包括控制器，其被配置为选择性地激活第一混合器和第二混合器之一，并且选择性地激活第三混合器和第四混合器中的一个。

公开(公告)号：US08873682B2

公开(公告)日：2014-10-28

申请号：US13631421

申请日：2012-09-28

Applicant: Broadcom Corporation

Inventor： Rami Mehio ,  Masoud Kahrizi ,  Cobus de Beer ,  Michael Buyanin

IPC: H04L27/06

CPC classification number: H03L7/18 ,  H03J7/045 ,  H03J7/065 ,  H03J2200/10

Abstract: A technique to provide hybrid compensation to correct for drifts in a reference frequency output from a digitally-controlled crystal oscillator (DCXO). A first compensation is provided to the DCXO to adjust for overlap or discontinuity of the reference frequency caused by switching capacitors in the capacitor array that controls drift of the reference frequency output. The second compensation is obtained at a phase-locked loop (PLL) that receives the reference frequency signal from the DCXO. The second compensation adjusts the PLL to adjust for variations of the reference frequency that remain after performing compensation in the DCXO.

公开(公告)号：US08873676B2

公开(公告)日：2014-10-28

申请号：US13872678

申请日：2013-04-29

Applicant: Broadcom Corporation

Inventor： Dmitriy Rozenblit ,  Masoud Kahrizi ,  Morten Damgaard

IPC: H04K1/02 ,  H04L25/03 ,  H04L25/49 ,  H04W52/12 ,  H03G3/30 ,  H04B1/04

CPC classification number: H04W52/12 ,  H03G3/001 ,  H03G3/3089 ,  H04B2001/0416

Abstract: Embodiments provide improved systems and methods of gain control and calibration for wireless transmitters. In particular, embodiments allow linear gain control over the entire transmitter gain control range, independent of temperature/process variations. Embodiments require very low power consumption compared to existing approaches. Embodiments may also be used for gain control calibration during production time, thereby substantially reducing production calibration time and cost.

Abstract translation: 实施例提供了用于无线发射机的增强控制和校准的改进的系统和方法。 特别地，实施例允许在整个发射机增益控制范围内的线性增益控制，与温度/过程变化无关。 与现有方法相比，实施例需要非常低的功耗。 实施例也可用于在生产时间期间的增益控制校准，从而大大减少生产校准时间和成本。

公开(公告)号：US09860760B2

公开(公告)日：2018-01-02

申请号：US14952871

申请日：2015-11-25

Applicant: BROADCOM CORPORATION

Inventor： Alireza Tarighat Mehrabani ,  Michael Boers ,  Masoud Kahrizi ,  Tirdad Sowlati ,  Bagher Afshar ,  Payam Torab Jahromi ,  Sean Timothy Nicolson ,  Brima Babatunde Ibrahim

IPC: H04L27/18 ,  H04W16/28 ,  H04W88/08

CPC classification number: H04W16/28 ,  H04W88/085

Abstract: A device implementing the subject scalable radio frequency communication system includes one or more primary radio frequency integrated circuits (RFICs) and at least one secondary RFIC. Each of the one or more primary RFICs is configured to receive an intermediate frequency (IF) signal from a baseband processor, upconvert the IF signal to a radio frequency (RF) signal, and transmit the RF signal to one or more secondary RFICs. The secondary RFICs under each of the one or more primary RFICs are configured to receive the RF signal from the corresponding primary RFIC, phase shift and amplify the RF signal, and transmit the RF signal via a plurality of antenna elements.

公开(公告)号：US09577685B1

公开(公告)日：2017-02-21

申请号：US15044969

申请日：2016-02-16

Applicant: Broadcom Corporation

Inventor： Alex Ahmad Mirzaei ,  Hooman Darabi ,  Masoud Kahrizi

IPC: H04B1/04

CPC classification number: H04B1/0475 ,  H04B2001/0425

Abstract: A system includes baseband circuitry and a transmitter. The electrical behavior of the transmitter may cause distortion effects in the transmit output of the transmitter during transmissions based on input signals from the baseband circuitry. The baseband circuitry may reference a calibration evaluation function for multiple transmit variables to pre-distort the input signal to compensate for the distortion effect. Pre-distortion calibration logic may generate the evaluation function using a one-dimensional calibration technique. The evaluation function may facilitate the baseband accessing calibration data without necessarily relying on a look-up table. In some cases, a one-dimensional calibration for multiple transmit variables may use fewer calibration points than a similarly accurate multi-dimensional calibration.

Abstract translation: 系统包括基带电路和发射机。 基于来自基带电路的输入信号，发射机的电气行为可能在传输期间在发射机的发射输出中产生失真效应。 基带电路可以参考多个发射变量的校准评估函数，以预失真输入信号以补偿失真效应。 预失真校准逻辑可以使用一维校准技术产生评估功能。 评估功能可以有助于基带访问校准数据，而不必依赖于查找表。 在某些情况下，对于多个发射变量的一维校准可以使用比类似精确的多维校准更少的校准点。

公开(公告)号：US20130267183A1

公开(公告)日：2013-10-10

申请号：US13906928

申请日：2013-05-31

Applicant: Broadcom Corporation

Inventor： Mohyee Mikhemar ,  Hooman Darabi ,  Masoud Kahrizi

IPC: H04B1/16

CPC classification number: H04B1/16 ,  H04B1/18 ,  H04B1/30

Abstract: According to one embodiment, a compact low-power receiver comprises a front-end producing a front-end gain and a back-end producing a back-end gain. The front-end includes a transconductance amplifier providing digital gain control and outputting an amplified receive signal, a mixer for generating a down-converted signal from the amplified receive signal, and a transimpedance amplifier (TIA) including a current mode buffer. The TIA provides gain control for amplifying the down-converted signal to produce a front-end output signal. In one embodiment, the back end includes a second-order low-pass filter to produce a filtered signal from the front-end output signal and an analog-to-digital converter (ADC), wherein the filtered signal is fed directly to the ADC without direct-current (DC) offset cancellation being performed. In various embodiments, the front-end gain is substantially greater than the back-end gain.

Abstract translation: 根据一个实施例，紧凑型低功率接收机包括产生前端增益的前端和产生后端增益的后端。 前端包括提供数字增益控制和输出放大的接收信号的跨导放大器，用于从放大的接收信号产生下变频信号的混频器，以及包括电流模式缓冲器的跨阻抗放大器（TIA）。 TIA提供用于放大下变频信号以产生前端输出信号的增益控制。 在一个实施例中，后端包括从前端输出信号产生滤波信号的二阶低通滤波器和模数转换器（ADC），其中滤波后的信号被直接馈送到ADC 没有执行直流（DC）偏移消除。 在各种实施例中，前端增益基本上大于后端增益。