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118 条记录 (耗时 0.027 秒)

    Communication station having an improved antenna system
    81.
    发明申请
    Communication station having an improved antenna system 审中-公开
    具有改进的天线系统的通信站

    公开(公告)号：US20070091865A1

    公开(公告)日：2007-04-26

    申请号：US11607484

    申请日：2006-12-01

    申请人： Gary Lomp ,  Leonid Kazakevich ,  Jeffrey Polan ,  David Mesecher

    发明人： Gary Lomp ,  Leonid Kazakevich ,  Jeffrey Polan ,  David Mesecher

    IPC分类号： H04B7/216

    CPC分类号： H04B7/0894 ,  H04J13/00 ,  H04W52/52

    摘要： A communication station includes an antenna system having multiple antennas and delay units for receiving a transmitted signal and outputting a combined signal having a known distortion imparted by the antenna system. The combined signal is in turn processed by a modem, which compensates for the known distortion in a manner which provides improved signal gain. The improved signal gain permits a reduction in transmit power and, accordingly, increased capacity of the communication station. Where the antenna system is to be remotely located from related signal processing equipment, separate units for the RF receiver/transmitter and the other signal processing equipment are provided so that the RF receiver/transmitter may also be remotely located along with the antenna system.

    摘要翻译： 通信站包括具有多个天线的天线系统和用于接收发送信号的延迟单元，并输出具有由天线系统赋予的已知失真的组合信号。 组合的信号又由调制解调器进行处理，调制解调器以提供改善的信号增益的方式补偿已知的失真。 改进的信号增益允许传输功率的降低，并因此降低通信站的容量。 在天线系统要远离相关信号处理设备的地方，RF接收机/发射机和其他信号处理设备的单独单元被提供，使得RF接收机/发射机也可以与天线系统一起远程定位。

    Precise sleep timer using a low-cost and low-accuracy clock
    82.
    发明授权
    Precise sleep timer using a low-cost and low-accuracy clock 失效
    使用低成本和低精度时钟的精确睡眠定时器

    公开(公告)号：US07197341B2

    公开(公告)日：2007-03-27

    申请号：US11000285

    申请日：2004-11-30

    申请人： Aykut Bultan ,  John W. Haim ,  Leonid Kazakevich

    发明人： Aykut Bultan ,  John W. Haim ,  Leonid Kazakevich

    IPC分类号： H04B1/38

    CPC分类号： H04W52/288 ,  H04W52/0216 ,  H04W52/0248 ,  H04W52/0293 ,  Y02D70/1242 ,  Y02D70/24

    摘要： A wireless transmit/receive unit (WTRU) uses an oscillator providing accuracy for synchronized communications parameters in an active mode, and operates at reduced power during a discontinuous reception (DRX) mode. A real time clock (RTC) is used as the frequency standard during the reduced power operation, and a frequency adjustment is effected while the RTC is used as the frequency standard. By effecting the frequency adjustment, the RTC is able to be used as the frequency standard for substantial time periods, thereby reducing power consumption of the WTRU during the DRX mode.

    摘要翻译： 无线发射/接收单元（WTRU）使用振荡器提供在活动模式下的同步通信参数的精度，并且在不连续接收（DRX）模式期间以降低的功率工作。 在降低功率运行期间，使用实时时钟（RTC）作为频率标准，并且在使用RTC作为频率标准时进行频率调整。 通过进行频率调整，RTC能够用作相当长的时间段的频率标准，从而在DRX模式期间降低了WTRU的功耗。

    System and method for a direct conversion multi-carrier processor
    83.
    发明授权
    System and method for a direct conversion multi-carrier processor 有权
    直接转换多载波处理器的系统和方法

    公开(公告)号：US07162218B2

    公开(公告)日：2007-01-09

    申请号：US10456300

    申请日：2003-06-06

    申请人： Timothy A. Axness ,  Leonid Kazakevich

    发明人： Timothy A. Axness ,  Leonid Kazakevich

    IPC分类号： H04B1/26 ,  H04B1/38

    CPC分类号： H04L5/06 ,  H03G3/3052 ,  H04B1/30 ,  H04L27/2608 ,  H04L27/3845

    摘要： A radio communications device such as a receiver, transmitter or transceiver provides direct conversion of quadrature signals between a radio frequency signal and a plurality of resolved channels. The device provides block processing of multiple RF carriers in a wireless communication system using a direct conversion transmitter/receiver and baseband signal processing.

    摘要翻译： 诸如接收机，发射机或收发机之类的无线电通信设备在射频信号和多个解决的信道之间提供正交信号的直接转换。 该设备使用直接转换发射机/接收机和基带信号处理在无线通信系统中提供多个RF载波的块处理。

    Transmitter circuit with modulated power amplifier bias control based on RF carrier envelope tracking
    86.
    发明申请
    Transmitter circuit with modulated power amplifier bias control based on RF carrier envelope tracking 审中-公开
    基于RF载波包络跟踪的调制功率放大器偏置控制的发射机电路

    公开(公告)号：US20060057980A1

    公开(公告)日：2006-03-16

    申请号：US11195887

    申请日：2005-08-03

    申请人： Tanbir Haque ,  Leonid Kazakevich

    发明人： Tanbir Haque ,  Leonid Kazakevich

    IPC分类号： H01Q11/12 ,  H04B1/04

    CPC分类号： H03F1/0272 ,  H03F1/02 ,  H03F1/0238 ,  H03F3/24 ,  H03F3/245 ,  H03F2200/435 ,  H04B1/0475 ,  H04B2001/045

    摘要： The present invention is a transmitter circuit in which envelope tracking of a power amplifier output is used to derive its power supply modulation. The circuit includes a power amplifier for amplifying an RF signal, a voltage power source and a switching amplifier for producing a modulated output responsive to the envelope of the amplified RF signal. The transmitter circuit further comprises a peak detector that eliminates the transmit carrier signal in the power supply modulation signal. A fraction of the PA output is utilized by the switching amplifier and the peak detector to produce a signal that follows the baseband signal envelope and is used to modulate the bias of the power amplifier.

    摘要翻译： 本发明是一种发射机电路，其中使用功率放大器输出的包络跟踪来导出其电源调制。 电路包括用于放大RF信号的功率放大器，电压电源和开关放大器，用于响应于放大的RF信号的包络产生调制的输出。 发射机电路还包括消除电源调制信号中的发射载波信号的峰值检测器。 开关放大器和峰值检测器利用PA输出的一小部分产生跟随基带信号包络的信号，并用于调制功率放大器的偏置。

    Communication transmission impairment emulator
    87.
    发明授权
    Communication transmission impairment emulator 失效
    通信传输损耗仿真器

    公开(公告)号：US07013257B1

    公开(公告)日：2006-03-14

    申请号：US09712888

    申请日：2000-11-15

    申请人： James Nolan ,  Leonid Kazakevich ,  Fryderyk Tyra ,  Robert Regis ,  Fred Schreider

    发明人： James Nolan ,  Leonid Kazakevich ,  Fryderyk Tyra ,  Robert Regis ,  Fred Schreider

    IPC分类号： G06F9/455

    CPC分类号： H04B17/0087

    摘要： A communication system emulator digitally emulates a plurality of signal impairments created by the transmitter and receiver components and communication medium in a typical communication system, for use in evaluating and refining modem design. A variety of linear and non-linear distortion characteristics are impressed on baseband signals between modulators and demodulators to evaluate and refine modem performance without requiring transmission frequency components or communication channel. The emulator comprises transmit modules, receive modules and communication media modules, and can accept or output analog or digital signals. Each module is configurable to allow modeling of simplex or duplex communication, or a common base station with multiple users transmitting or receiving, all configurations with or without communication media impairment emulation. Each module can be configured to add a plurality of linear and non-linear impairments to a baseband signal.

    摘要翻译： 通信系统仿真器在典型的通信系统中数字地仿真由发射机和接收机组件和通信介质创建的多个信号损伤，用于评估和完善调制解调器设计。 在调制器和解调器之间的基带信号上施加了各种线性和非线性失真特性，以评估和优化调制解调器性能，而不需要传输频率分量或通信信道。 仿真器包括发射模块，接收模块和通信媒体模块，并且可以接收或输出模拟或数字信号。 每个模块都可配置为允许对单通道或双工通信进行建模，或者是具有多个用户发送或接收的所有配置的通用介质损伤仿真的所有配置。 每个模块可以被配置为向基带信号添加多个线性和非线性损伤。

    Precise sleep timer using a low-cost and low-accuracy clock
    89.
    发明申请
    Precise sleep timer using a low-cost and low-accuracy clock 失效
    使用低成本和低精度时钟的精确睡眠定时器

    公开(公告)号：US20050153751A1

    公开(公告)日：2005-07-14

    申请号：US11000285

    申请日：2004-11-30

    申请人： Aykut Bultan ,  John Haim ,  Leonid Kazakevich

    发明人： Aykut Bultan ,  John Haim ,  Leonid Kazakevich

    IPC分类号： H04B1/16 ,  H04B7/005 ,  H04B7/01 ,  H04B7/015 ,  H04W52/28

    CPC分类号： H04W52/288 ,  H04W52/0216 ,  H04W52/0248 ,  H04W52/0293 ,  Y02D70/1242 ,  Y02D70/24

    摘要： A wireless transmit/receive unit (WTRU) uses an oscillator providing accuracy for synchronized communications parameters in an active mode, and operates at reduced power during a discontinuous reception (DRX) mode. A real time clock (RTC) is used as the frequency standard during the reduced power operation, and a frequency adjustment is effected while the RTC is used as the frequency standard. By effecting the frequency adjustment, the RTC is able to be used as the frequency standard for substantial time periods, thereby reducing power consumption of the WTRU during the DRX mode.

    摘要翻译： 无线发射/接收单元（WTRU）使用振荡器提供在活动模式下的同步通信参数的精度，并且在不连续接收（DRX）模式期间以降低的功率工作。 在降低功率运行期间，使用实时时钟（RTC）作为频率标准，并且在使用RTC作为频率标准时进行频率调整。 通过进行频率调整，RTC能够用作相当长的时间段的频率标准，从而在DRX模式期间降低了WTRU的功耗。