公开(公告)号：US20120021699A1

公开(公告)日：2012-01-26

申请号：US12804399

申请日：2010-07-20

申请人： Mohyee Mikhemar ,  Hooman Darabi ,  Masoud Kahrizi

发明人： Mohyee Mikhemar ,  Hooman Darabi ,  Masoud Kahrizi

IPC分类号： H04B1/40 ,  H04B7/00

CPC分类号： H04B1/16 ,  H04B1/18 ,  H04B1/30

摘要： 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.

摘要翻译： 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。

公开(公告)号：US20110116403A1

公开(公告)日：2011-05-19

申请号：US12947905

申请日：2010-11-17

申请人： Masoud Kahrizi ,  Jaleh Komaili ,  John E. Vasa

发明人： Masoud Kahrizi ,  Jaleh Komaili ,  John E. Vasa

IPC分类号： H04W24/00

CPC分类号： H04B1/0475 ,  H04B1/30 ,  H04B1/525 ,  H04L25/03878

摘要： A transmit signal second-order inter-modulation (IM2) canceller for a portable handset using a full duplex mode of operation (e.g., WCDMA) is used to controllably reduce IM2 introduced by a transmit signal that appears in a received signal in a receive channel of the portable handset. The transmit signal IM2 canceller includes a delay estimator and a digital signal adjuster. The delay estimator receives a first input from a receive channel and a second input from a transmit channel. The delay estimator generates an estimate of the IM2 that the transmit channel introduces in the receive channel. The digital signal adjuster removes the estimate of the IM2 before forwarding a modified receive channel signal to a baseband subsystem of the portable handset.

摘要翻译： 用于使用全双工操作模式（例如，WCDMA）的便携式手机的发射信号二阶互调制（IM2）消除器被用于可控制地减少出现在接收信道中的接收信号中的发射信号引入的IM2 的便携式手机。 发送信号IM2消除器包括延迟估计器和数字信号调节器。 延迟估计器从接收信道接收第一输入，并从发送信道接收第二输入。 延迟估计器产生发送信道在接收信道中引入的IM2的估计。 在将修改的接收信道信号转发到便携式手持机的基带子系统之前，数字信号调节器去除IM2的估计。

公开(公告)号：US20110021237A1

公开(公告)日：2011-01-27

申请号：US12865687

申请日：2009-02-07

申请人： Yongqiang He ,  John E. Vasa ,  Masoud Kahrizi

发明人： Yongqiang He ,  John E. Vasa ,  Masoud Kahrizi

IPC分类号： H04B7/00

CPC分类号： H04W52/52 ,  H04W52/226 ,  H04W52/367

摘要： A mobile handset is arranged with an adaptive power controller to controllably adjust transmit power. The adaptive power controller is coupled to a power amplifier module to form a closed feedback loop. The adaptive power control module includes a first shifter, a first sealer, an accumulator and a hold element. The first shifter and first sealer receive respective bandwidth control signals and an error signal. The first shifter and first sealer generate a modified error signal that is forwarded to and filtered by the accumulator and the hold element to generate a power control signal. The power control signal, which is generated the radio frequency subsystem of the handset can quickly and accurately track rapid changes in transmit power.

摘要翻译： 移动手机配置有自适应功率控制器以可控地调节发射功率。 自适应功率控制器耦合到功率放大器模块以形成闭合反馈回路。 自适应功率控制模块包括第一变速器，第一闭合器，蓄能器和保持元件。 第一移位器和第一密封器接收相应的带宽控制信号和误差信号。 第一移位器和第一密封器产生经过累加器和保持元件转发和滤波的修正误差信号，以产生功率控制信号。 产生手机射频子系统的功率控制信号可以快速，准确地跟踪发射功率的快速变化。

公开(公告)号：US20080233994A1

公开(公告)日：2008-09-25

申请号：US12052635

申请日：2008-03-20

申请人： Masoud Kahrizi ,  John E. Vasa ,  Darioush Agahi

发明人： Masoud Kahrizi ,  John E. Vasa ,  Darioush Agahi

IPC分类号： H04B7/00

CPC分类号： H04L27/20 ,  H03L7/1974

摘要： A digital modulator for a portable handset using 8PSK or EDGE modulation with a direct launch transmitter is used to controllably adjust the transmit power of the portable handset. The digital modulator includes a controller coupled between a memory and an accumulator. The controller is responsive to an indication that the transmit power should be transitioned. The controller temporarily alters the data transferred from the memory to the accumulator during transitions of the transmit power level.

摘要翻译： 用于使用具有直接发射发射机的8PSK或EDGE调制的便携式手机的数字调制器用于可控地调节便携式手持机的发射功率。 数字调制器包括耦合在存储器和累加器之间的控制器。 控制器响应于应该转换发射功率的指示。 在发射功率电平转换期间，控制器暂时改变从存储器传输到累加器的数据。

公开(公告)号：US20130155911A1

公开(公告)日：2013-06-20

申请号：US13328794

申请日：2011-12-16

申请人： Masoud Kahrizi ,  Nooshin Vakilian ,  Farzad Etemadi

发明人： Masoud Kahrizi ,  Nooshin Vakilian ,  Farzad Etemadi

IPC分类号： H04B7/00 ,  H04B1/46

CPC分类号： H04B1/525

摘要： A structure and method to reduce second order intermodulation (IM2) of a receiver in a transceiver is provided. Specifically, the output of a detector in a transmit power control loop is utilized to calculate IM2 and the value is subtracted from a receive path to mitigate IM2 in a wireless communication devices. Alternatively, the detector can be placed in one or more receive paths to include receiver front-end passband variation.

摘要翻译： 提供了一种用于减少收发器中的接收机的二阶互调（IM2）的结构和方法。 具体地，利用发射功率控制环路中的检测器的输出来计算IM2，并且在无线通信设备中从接收路径减去该值以减轻IM2。 或者，检测器可以放置在一个或多个接收路径中以包括接收机前端通带变化。

公开(公告)号：US20080232268A1

公开(公告)日：2008-09-25

申请号：US12052991

申请日：2008-03-21

申请人： Masoud Kahrizi ,  Jaleh Komaili ,  John E. Vasa

发明人： Masoud Kahrizi ,  Jaleh Komaili ,  John E. Vasa

IPC分类号： H04J1/16

CPC分类号： H04B1/525 ,  H04B1/30

摘要： A transmit signal second-order inter-modulation (IM2) canceller for a portable handset using a full duplex mode of operation (e.g., WCDMA) is used to controllably reduce IM2 introduced by a transmit signal that appears in a received signal in a receive channel of the portable handset. The transmit signal IM2 canceller includes a delay estimator and a digital signal adjuster. The delay estimator receives a first input from a receive channel and a second input from a transmit channel. The delay estimator generates an estimate of the IM2 that the transmit channel introduces in the receive channel. The digital signal adjuster removes the estimate of the IM2 before forwarding a modified receive channel signal to a baseband subsystem of the portable handset.

摘要翻译： 使用用于使用全双工操作模式（例如，WCDMA）的便携式手持机的发射信号二阶互调制（IM 2）消除器可控制地减少出现在接收信号中的发射信号引入的IM 2 接收便携式手机的通道。 发送信号IM 2消除器包括延迟估计器和数字信号调节器。 延迟估计器从接收信道接收第一输入，并从发送信道接收第二输入。 延迟估计器产生发送信道在接收信道中引入的IM 2的估计。 在将修改的接收信道信号转发到便携式手持机的基带子系统之前，数字信号调节器去除IM 2的估计。

公开(公告)号：US07161537B2

公开(公告)日：2007-01-09

申请号：US11115282

申请日：2005-04-27

申请人： Gholamreza Rafi ,  Iraj Ehtezazi Alamdari ,  Pedram Mousavi Bafrooei ,  Safeiddin Safavi-Naeini ,  Masoud Kahrizi

发明人： Gholamreza Rafi ,  Iraj Ehtezazi Alamdari ,  Pedram Mousavi Bafrooei ,  Safeiddin Safavi-Naeini ,  Masoud Kahrizi

IPC分类号： H01Q1/38 ,  H01Q13/10

CPC分类号： H01Q21/065 ,  H01Q5/357 ,  H01Q9/0442

摘要： A microstrip patch antenna is provided having a high gain performance with a smaller size compared to existing approaches. The antenna includes a patch having a polygon shape, such as a convex polygon, and a modified V-slot in the polygon patch including high-frequency control segments. Such an antenna has a dual band performance, such as in the Ka and Ku bands. An array of antenna elements is also described, as well as an ultra low profile phased array antenna system.

摘要翻译： 提供了与现有方法相比具有较小尺寸的高增益性能的微带贴片天线。 天线包括具有多边形形状的贴片，例如凸多边形，以及包括高频控制段的多边形贴片中的修改的V形槽。 这样的天线具有双频带性能，例如在Ka和Ku频带中。 还描述了天线元件阵列，以及超低分辨率相控阵天线系统。

公开(公告)号：US20050243005A1

公开(公告)日：2005-11-03

申请号：US11115282

申请日：2005-04-27

申请人： Gholamreza Rafi ,  Iraj Alamdari ,  Pedram Bafrooei ,  Safeiddin Safavi-Naeini ,  Masoud Kahrizi

发明人： Gholamreza Rafi ,  Iraj Alamdari ,  Pedram Bafrooei ,  Safeiddin Safavi-Naeini ,  Masoud Kahrizi

IPC分类号： H01Q1/38 ,  H01Q5/00 ,  H01Q5/357 ,  H01Q9/04 ,  H01Q13/08 ,  H01Q13/10 ,  H01Q21/06

CPC分类号： H01Q21/065 ,  H01Q5/357 ,  H01Q9/0442

摘要： A microstrip patch antenna is provided having a high gain performance with a smaller size compared to existing approaches. The antenna includes a patch having a polygon shape, such as a convex polygon, and a modified V-slot in the polygon patch including high-frequency control segments. Such an antenna has a dual band performance, such as in the Ka and Ku bands. An array of antenna elements is also described, as well as an ultra low profile phased array antenna system.

摘要翻译： 提供了与现有方法相比具有较小尺寸的高增益性能的微带贴片天线。 天线包括具有多边形形状的贴片，例如凸多边形，以及包括高频控制段的多边形贴片中的修改的V形槽。 这样的天线具有双频带性能，例如在Ka和Ku频带中。 还描述了天线元件阵列，以及超低分辨率相控阵天线系统。

公开(公告)号：US08855029B2

公开(公告)日：2014-10-07

申请号：US12947905

申请日：2010-11-17

申请人： Masoud Kahrizi ,  Jaleh Komaili ,  John E. Vasa

发明人： Masoud Kahrizi ,  Jaleh Komaili ,  John E. Vasa

IPC分类号： H04B1/44 ,  H04B1/30 ,  H04B1/04 ,  H04B1/52 ,  H04B7/212 ,  H04B1/38 ,  H04L5/16 ,  H03D1/04 ,  H04L25/03

CPC分类号： H04B1/0475 ,  H04B1/30 ,  H04B1/525 ,  H04L25/03878

摘要： A transmit signal second-order inter-modulation (IM2) canceller for a portable handset using a full duplex mode of operation (e.g., WCDMA) is used to controllably reduce IM2 introduced by a transmit signal that appears in a received signal in a receive channel of the portable handset. The transmit signal IM2 canceller includes a delay estimator and a digital signal adjuster. The delay estimator receives a first input from a receive channel and a second input from a transmit channel. The delay estimator generates an estimate of the IM2 that the transmit channel introduces in the receive channel. The digital signal adjuster removes the estimate of the IM2 before forwarding a modified receive channel signal to a baseband subsystem of the portable handset.

摘要翻译： 用于使用全双工操作模式（例如，WCDMA）的便携式手机的发射信号二阶互调制（IM2）消除器被用于可控制地减少出现在接收信道中的接收信号中的发射信号引入的IM2 的便携式手机。 发送信号IM2消除器包括延迟估计器和数字信号调节器。 延迟估计器从接收信道接收第一输入，并从发送信道接收第二输入。 延迟估计器产生发送信道在接收信道中引入的IM2的估计。 在将修改的接收信道信号转发到便携式手持机的基带子系统之前，数字信号调节器去除IM2的估计。

公开(公告)号：US08606311B2

公开(公告)日：2013-12-10

申请号：US12865687

申请日：2009-02-07

申请人： Yongqiang He ,  John E. Vasa ,  Masoud Kahrizi

发明人： Yongqiang He ,  John E. Vasa ,  Masoud Kahrizi

IPC分类号： H04B7/00

CPC分类号： H04W52/52 ,  H04W52/226 ,  H04W52/367

摘要： A mobile handset is arranged with an adaptive power controller to controllably adjust transmit power. The adaptive power controller is coupled to a power amplifier module to form a closed feedback loop. The adaptive power control module includes a first shifter, a first sealer, an accumulator and a hold element. The first shifter and first sealer receive respective bandwidth control signals and an error signal. The first shifter and first sealer generate a modified error signal that is forwarded to and filtered by the accumulator and the hold element to generate a power control signal. The power control signal, which is generated the radio frequency subsystem of the handset can quickly and accurately track rapid changes in transmit power.

摘要翻译： 移动手机配置有自适应功率控制器以可控地调节发射功率。 自适应功率控制器耦合到功率放大器模块以形成闭合反馈回路。 自适应功率控制模块包括第一变速器，第一闭合器，蓄能器和保持元件。 第一移位器和第一密封器接收相应的带宽控制信号和误差信号。 第一移位器和第一密封器产生经过累加器和保持元件转发和滤波的修正误差信号，以产生功率控制信号。 产生手机射频子系统的功率控制信号可以快速，准确地跟踪发射功率的快速变化。