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    Portable computing device with a saw-less transceiver
    62.
    发明授权
    Portable computing device with a saw-less transceiver 有权
    带无锯齿收发器的便携式计算设备

    公开(公告)号：US08761710B2

    公开(公告)日：2014-06-24

    申请号：US13076116

    申请日：2011-03-30

    Applicant: Ahmadreza (Reza) Rofougaran ,  Hooman Darabi

    Inventor： Ahmadreza (Reza) Rofougaran ,  Hooman Darabi

    IPC: H04B1/16

    CPC classification number: H04B1/109 ,  H03D7/1433 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1466 ,  H03D7/1483 ,  H03D7/165 ,  H03D2200/0025 ,  H03D2200/0084 ,  H03D2200/0088 ,  H03D2200/009 ,  H04B1/40

    Abstract: A portable computing device includes an FEM, a SAW-less receiver, a SAW-less transmitter, and a baseband processing unit. The FEM isolates one or more outbound RF signals from one or more inbound RF signals. The SAW-less receiver converts the one or more inbound RF signals into one or more inbound intermediate frequency (IF) signals by frequency translating a baseband filter response to an IF filter response and/or an RF filter response. The SAW-less receiver filters the inbound RF signal(s) in accordance with the RF filter response and/or filters the inbound IF signal(s) in accordance with the IF filter response. The SAW-less receiver then converts the inbound IF signal(s) into inbound symbol stream(s). The SAW-less transmitter converts outbound symbol stream(s) into the outbound RF signal(s). The baseband processing unit converts outbound data into the outbound symbol stream(s) and convert the inbound symbol stream(s) into inbound data.

    Abstract translation: 一种便携式计算设备包括有限元法，无SAW收发器，无SAW发射机和基带处理单元。 FEM从一个或多个入站RF信号隔离一个或多个出站RF信号。 无SAW接收器通过将基带滤波器响应频率转换为IF滤波器响应和/或RF滤波器响应来将一个或多个入站RF信号转换成一个或多个入站中频（IF）信号。 无SAW接收机根据RF滤波器响应对入站RF信号进行滤波和/或根据IF滤波器响应对入站IF信号进行滤波。 然后，无SAW接收器将入站IF信号转换成入站符号流。 无SAW发射器将出站符号流转换为出站RF信号。 基带处理单元将出站数据转换成出站符号流，并将入站符号流转换为入站数据。

    Saw-less receiver including transimpedance amplifiers
    63.
    发明授权
    Saw-less receiver including transimpedance amplifiers 有权
    无锯齿接收机包括跨阻放大器

    公开(公告)号：US08724747B2

    公开(公告)日：2014-05-13

    申请号：US13076143

    申请日：2011-03-30

    Applicant: Ahmad Mirzaei ,  Hooman Darabi

    Inventor： Ahmad Mirzaei ,  Hooman Darabi

    IPC: H04L27/06

    CPC classification number: H04L27/36

    Abstract: A SAW-less receiver includes an FEM interface module, an RF to IF receiver section, and a receiver IF to baseband section. The RF to IF receiver section includes inverter based LNA modules, a mixing module, and transimpedance amplifier modules. The inverter based LNA modules amplify inbound RF signal to produce a positive leg current RF signal and a negative leg current RF signal. The mixing module converts the positive and negative leg current RF signals into an in-phase (I) mixed current signal and a quadrature (Q) mixed current signal. The transimpedance amplifier modules convert the I mixed current signal into an I mixed voltage signal and the Q mixed current signal into a Q mixed voltage signal. The receiver IF to baseband section converts the I and Q mixed voltage signals into one or more inbound symbol streams.

    Abstract translation: 无SAW接收机包括FEM接口模块，RF至IF接收机部分和接收机IF到基带部分。 RF至IF接收器部分包括基于反相器的LNA模块，混频模块和跨阻放大器模块。 基于逆变器的LNA模块放大入站RF信号以产生正脚电流RF信号和负脚电流RF信号。 混合模块将正极和负极脚电流RF信号转换为同相（I）混合电流信号和正交（Q）混合电流信号。 跨阻放大器模块将​​I混合电流信号转换为I混合电压信号，将Q混合电流信号转换为Q混合电压信号。 接收机IF到基带部分将I和Q混合电压信号转换成一个或多个入站符号流。

    Distortion cancellation in radio receivers using I/Q correction
    64.
    发明授权
    Distortion cancellation in radio receivers using I/Q correction 有权
    使用I / Q校正的无线电接收机中的失真消除

    公开(公告)号：US08615059B2

    公开(公告)日：2013-12-24

    申请号：US13071295

    申请日：2011-03-24

    Applicant: Mohyee Mikhemar ,  Hooman Darabi

    Inventor： Mohyee Mikhemar ,  Hooman Darabi

    IPC: H03D1/04

    CPC classification number: H04L27/0014 ,  H04L2025/03617 ,  H04L2027/0024

    Abstract: A technique to remove second order and third order nonlinearity distortions caused by a blocker signal at an input of a radio receiver. An envelope detector is utilized at an input of the RF front-end of the receiver to obtain a magnitude of the overall signal. The output of the envelope detector is then processed at baseband to estimate coefficients that relate to the distortion. Once the coefficients are obtained, the coefficients are applied at an I/Q imbalance correction stage to also correct for the distortion by cancelling the distortion from the received signal.

    Abstract translation: 一种在无线电接收机的输入端去除由阻塞信号引起的二阶和三阶非线性失真的技术。 在接收机的RF前端的输入处使用包络检测器以获得整体信号的幅度。 然后在基带处理包络检测器的输出以估计与失真相关的系数。 一旦获得了系数，则在I / Q不平衡校正级施加系数，以通过从接收信号中消除失真来校正失真。

    Multiple-phase frequency translated filter
    66.
    发明授权
    Multiple-phase frequency translated filter 有权
    多相频率滤波器

    公开(公告)号：US08483628B2

    公开(公告)日：2013-07-09

    申请号：US13152731

    申请日：2011-06-03

    Applicant: Ahmad Mirzaei ,  David Murphy ,  Hooman Darabi

    Inventor： Ahmad Mirzaei ,  David Murphy ,  Hooman Darabi

    IPC: H04B1/44

    CPC classification number: H03H11/1291 ,  H01P5/10 ,  H03H7/38 ,  H03H7/463 ,  H03H11/44 ,  H03H19/008 ,  H03H2011/0494 ,  H04B1/40

    Abstract: A frequency translation filter includes a baseband filter circuit, a clock generator, and a switching circuit. The baseband filter circuit is operable to provide a baseband filter response. The clock generator is operable to generate multiple-phase clock signals at a desired frequency. The switching circuit is operable to frequency translate the baseband filter response of the baseband filter circuit to a high frequency filter response in accordance with the multiple-phase clock signals.

    Abstract translation: 频率转换滤波器包括基带滤波器电路，时钟发生器和开关电路。 基带滤波器电路可操作以提供基带滤波器响应。 时钟发生器可操作以产生期望频率的多相时钟信号。 开关电路可操作以根据多相时钟信号将基带滤波器电路的基带滤波器响应频率转换为高频滤波器响应。

    Integrated multimode radio transmitter and components thereof
    67.
    发明授权
    Integrated multimode radio transmitter and components thereof 有权
    集成多模无线电发射机及其组件

    公开(公告)号：US08442452B2

    公开(公告)日：2013-05-14

    申请号：US12914278

    申请日：2010-10-28

    Applicant: Hooman Darabi ,  Brima B. Ibrahim ,  Ahmadreza (Reza) Rofougaran

    Inventor： Hooman Darabi ,  Brima B. Ibrahim ,  Ahmadreza (Reza) Rofougaran

    IPC: H04B1/38

    CPC classification number: H04B1/406

    Abstract: An integrated multi-mode radio transmitter includes a multiplexor and a shared front-end. The is operable to select an IF signal of a plurality of IF signals based upon a selection signal that is indicative of a particular operational mode of the one of the plurality of IF signals. The shared front-end is coupled to receive the selected IF signal, wherein the shared front-end converts the selected IF signal into a radio frequency (RF) signal that is modulated in accordance with the particular operational mode of the one of the plurality of IF stages.

    Abstract translation: 集成的多模式无线电发射机包括多路复用器和共享前端。 可操作以基于指示多个IF信号之一的特定操作模式的选择信号来选择多个IF信号的IF信号。 共享前端被耦合以接收所选择的IF信号，其中共享前端将所选择的IF信号转换成根据多个信号中的一个的特定操作模式被调制的射频（RF）信号 IF阶段。

    Method and system for low-noise, highly-linear receiver front-end
    68.
    发明授权
    Method and system for low-noise, highly-linear receiver front-end 有权

    公开(公告)号：US08422979B2

    公开(公告)日：2013-04-16

    申请号：US13050570

    申请日：2011-03-17

    Applicant: David Murphy ,  Ahmad Mirzaei ,  Mohyee Mikhemar ,  Hooman Darabi

    Inventor： David Murphy ,  Ahmad Mirzaei ,  Mohyee Mikhemar ,  Hooman Darabi

    IPC: H04B1/26

    CPC classification number: H04B1/16 ,  H04B1/30

    Abstract: Aspects of a method and system for a low-noise, highly-linear receiver front-end are provided. In this regard, a received signal may be processed via one or more transconductances, one or more transimpedance amplifiers (TIAs), and one or more mixers to generate a first baseband signal corresponding to a voltage at a node of the receiver, and a second baseband signal corresponding to a current at the node of the receiver. The first signal and the second signal may be processed to recover information from the received signal. The first signal may be generated via a first one or more signal paths of the receiver and the second signal may be generated via a second one or more signal paths of the receiver.

    LOW NOISE AMPLIFIER PROTECTION USING A CLAMPING DEVICE
    70.
    发明申请
    LOW NOISE AMPLIFIER PROTECTION USING A CLAMPING DEVICE 有权
    使用钳位装置的低噪声放大器保护

    公开(公告)号：US20120329418A1

    公开(公告)日：2012-12-27

    申请号：US13169681

    申请日：2011-06-27

    Applicant: Yuyu Chang ,  Hooman Darabi

    Inventor： Yuyu Chang ,  Hooman Darabi

    IPC: H04B1/10

    CPC classification number: H03F1/52 ,  H03F3/195 ,  H03F3/45475 ,  H03F2200/294 ,  H03F2200/444 ,  H03F2200/453 ,  H03F2200/78

    Abstract: Embodiments of a radio frequency (RF) receiver implementing one or more forms of protection to protect devices of the RF receiver from in-band interferers is provided. The RF receiver includes an integrated circuit terminal configured to couple a RF signal received at an antenna to a RF signal path, and a low noise amplifier (LNA) coupled to the RF signal path and configured to amplify the RF signal to provide an amplified RF signal. To protect the LNA from in-band interferers, the RF receiver can further include one or more clamping circuits and/or an over-voltage detector to determine if a peak of the RF signal exceeds an acceptable level.

    Abstract translation: 提供了实现一种或多种形式的保护的射频（RF）接收机的实施例，以保护RF接收机的设备免受带内干扰。 RF接收机包括被配置为将在天线处接收的RF信号耦合到RF信号路径的集成电路终端和耦合到RF信号路径的低噪声放大器（LNA），并被配置为放大RF信号以提供放大RF 信号。 为了保护LNA免受带内干扰，RF接收机还可包括一个或多个钳位电路和/或过电压检测器，以确定RF信号的峰值是否超过可接受的电平。

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