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    Method and Apparatus For Dynamically Adjusting a Transmitter's Impedance and Implementing a Hybrid Power Amplifier Therein Which Selectively Connects Linear and Switch-Mode Power Amplifiers in Series
    11.
    发明申请
    Method and Apparatus For Dynamically Adjusting a Transmitter's Impedance and Implementing a Hybrid Power Amplifier Therein Which Selectively Connects Linear and Switch-Mode Power Amplifiers in Series 审中-公开
    用于动态调整发射机阻抗和实现混合功率放大器的方法和装置，其中选择性地将线性和开关模式功率放大器连接在一起

    公开(公告)号：US20080214125A1

    公开(公告)日：2008-09-04

    申请号：US12121092

    申请日：2008-05-15

    申请人： Tanbir Haque ,  Alpaslan Demir ,  Leonid Kazakevich ,  Gerard Klahn

    发明人： Tanbir Haque ,  Alpaslan Demir ,  Leonid Kazakevich ,  Gerard Klahn

    IPC分类号： H04B1/40 ,  H04B1/04

    CPC分类号： H04B1/0458 ,  H03F1/0261 ,  H03F1/56 ,  H03F3/24 ,  H03F2200/207 ,  H03F2200/465 ,  H03G3/3042 ,  H04W52/52 ,  Y02D70/14

    摘要： A method and apparatus for dynamically adjusting the impedance between a transmitter's power amplifier (PA) and antenna to efficiently transfer power from the PA to the antenna. The impedance between the PA and the antenna is adjusted based on power level measurements and/or PA direct current (DC) consumption measurements, depending on whether the PA is a linear PA or a switch-mode PA. In another embodiment, a hybrid PA including a first stage linear PA and a second stage switch-mode PA is implemented in a transmitter. The hybrid PA selectively connects the output of the first stage linear PA to one of the input of the second stage switch-mode PA and the output of the hybrid PA, depending on the output power level of the first stage linear PA, the output power level of the hybrid PA, or a requirement indicated by a transmit power control (TPC) command.

    摘要翻译： 一种用于动态调整发射机功率放大器（PA）和天线之间的阻抗以有效地将功率从PA传输到天线的方法和装置。 根据PA是线性PA还是开关模式PA，PA和天线之间的阻抗根据功率电平测量和/或PA直流（DC）消耗测量值进行调整。 在另一个实施例中，包括第一级线性PA和第二级开关模式PA的混合PA实现在发射机中。 根据第一级线性PA的输出功率电平，混合PA选择性地将第一级线性PA的输出连接到第二级开关模式PA的输入和混合PA的输出之一，输出功率 混合PA的电平或由发射功率控制（TPC）指令指示的要求。

    DIGITAL TRANSMITTER
    12.
    发明申请
    DIGITAL TRANSMITTER 有权
    数字发射机

    公开(公告)号：US20070211821A1

    公开(公告)日：2007-09-13

    申请号：US11685003

    申请日：2007-03-12

    申请人： Tanbir Haque ,  Leonid Kazakevich

    发明人： Tanbir Haque ,  Leonid Kazakevich

    IPC分类号： H04L25/49 ,  H04L27/20

    CPC分类号： H04L27/361 ,  H03F3/217 ,  H03F3/24 ,  H03F2200/331 ,  H03F2200/336 ,  H04B1/0014 ,  H04B1/0475 ,  H04B2001/0408 ,  H04L27/362 ,  H04L27/364

    摘要： In a digital Cartesian modulation transmitter, an encoder generates 1-bit logic signals from in-phase and quadrature signals. A single bit digital modulator multiplexes the 1-bit logic signals for Cartesian I/Q modulation. A digital upconverter (DUC) upconverts the multiplexed 1-bit logic signal. A digital power amplifier (DPA) generates a radio frequency (RF) signal based on the upconverted signal. In a digital polar modulation transmitter, an encoder converts a magnitude signal to a first 1-bit logic signal. A digital phase modulator modulates a carrier using a phase signal to generate a second 1-bit logic signal. A DUC upconverts the second 1-bit logic signal. A first-in first-out (FIFO) memory stores the first 1-bit logic signal. A combiner combines angle information contained in the second 1-bit logic signal with magnitude information contained in the first 1-bit logic signal stored in the FIFO memory. A DPA generates an RF signal based on the combined signal.

    摘要翻译： 在数字笛卡尔调制发射机中，编码器从同相和正交信号中产生1位逻辑信号。 单位数字调制器将1位逻辑信号复用为笛卡尔I / Q调制。 数字上变频器（DUC）将多路复用的1位逻辑信号上变频。 数字功率放大器（DPA）基于上变频信号产生射频（RF）信号。 在数字极化调制发射机中，编码器将幅度信号转换为第一个1位逻辑信号。 数字相位调制器使用相位信号来调制载波以产生第二个1位逻辑信号。 DUC将第二个1位逻辑信号上变频。 先进先出（FIFO）存储器存储第一个1位逻辑信号。 组合器将包含在第二1位逻辑信号中的角度信息与存储在FIFO存储器中的第一1位逻辑信号中包含的幅度信息相结合。 DPA根据组合信号产生RF信号。

    Method and system for code reuse and capacity enhancement using null steering
    14.
    发明申请
    Method and system for code reuse and capacity enhancement using null steering 有权
    使用零转向的代码重用和容量增强的方法和系统

    公开(公告)号：US20070171962A1

    公开(公告)日：2007-07-26

    申请号：US11731617

    申请日：2007-03-30

    申请人： Nadar Bolourchi ,  Leonid Kazakevich ,  Rui Yang

    发明人： Nadar Bolourchi ,  Leonid Kazakevich ,  Rui Yang

    IPC分类号： H04B1/00

    CPC分类号： H01Q3/2611 ,  H04B7/0617 ,  H04B7/0669 ,  H04J13/0077 ,  H04W88/08

    摘要： The number of users and data capacity of wireless systems are increased by employing apparatus and method for increasing the number of spreading codes available in the system by providing a mechanism to reuse the already allocated spreading code or use the codes that may correlate to those already being used within the same sector/cell. This, in return, provides capacity improvement proportional to the number of added base station (BS) antennas for each cell. An antenna null steering technique for code allocation maintains the cross correlation properties of the codes only for the desired user and to obtain a gain in capacity improvement.

    摘要翻译： 通过采用用于增加系统中可用的扩展码数目的装置和方法来提高无线系统的用户数量和数据容量，提供一种机制来重用已经分配的扩展码或使用可能与已经分配的扩展码相关的代码 在相同的扇区/单元格内使用。 这反过来提供了与每个小区的增加的基站（BS）天线的数量成比例的能力提高。 用于代码分配的天线零点转向技术仅针对期望的用户维护代码的互相关性质，并获得容量改进的增益。

    Method and apparatus for delivery of universal mobile telecommunications systems (UMTS) based unidirectional services over a wireless local area network (WLAN)
    15.
    发明授权
    Method and apparatus for delivery of universal mobile telecommunications systems (UMTS) based unidirectional services over a wireless local area network (WLAN) 失效
    用于通过无线局域网（WLAN）传送基于通用移动电信系统（UMTS）的单向业务的方法和装置，

    公开(公告)号：US07173924B2

    公开(公告)日：2007-02-06

    申请号：US10872682

    申请日：2004-06-21

    申请人： Kamel M. Shaheen ,  Leonid Kazakevich

    发明人： Kamel M. Shaheen ,  Leonid Kazakevich

    IPC分类号： H04Q7/24 ,  H04L12/28 ,  H04J3/16

    CPC分类号： H04W92/02 ,  H04W4/12 ,  H04W88/06

    摘要： Method and apparatus for delivery of UMTS services to a dual mode mobile station through a WLAN when the mobile station is operating within a WLAN environment. UMTS services are transmitted to a WLAN through a UMTS repeater tuned to receive services addressed to registered IDs and transmit these services to that (those) WLAN(s) having mobile stations registered with the UMTS. The WLAN format converter converts the UMTS format into a WLAN message format and communicates the message to the registered users.

    摘要翻译： 当移动台在WLAN环境中操作时，通过WLAN向双模移动台传送UMTS业务的方法和装置。 通过经调谐以接收寻址到注册ID的服务的UMTS中继器将UMTS服务发送到WLAN，并将这些服务发送到具有向UMTS注册的移动站的那些（那些）WLAN。 WLAN格式转换器将UMTS格式转换成WLAN消息格式，并将消息传达给注册用户。

    Simple smart-antenna system for MUD-enabled cellular networks
    18.
    发明授权
    Simple smart-antenna system for MUD-enabled cellular networks 有权
    用于支持MUD的蜂窝网络的简单智能天线系统

    公开(公告)号：US07130662B2

    公开(公告)日：2006-10-31

    申请号：US10331073

    申请日：2002-12-27

    申请人： Leonid Kazakevich ,  Rui Yang ,  Alexander Reznik

    发明人： Leonid Kazakevich ,  Rui Yang ,  Alexander Reznik

    IPC分类号： H04B1/38 ,  H04M1/00

    CPC分类号： H04B7/04

    摘要： A “smart antenna” method and system for use in cellular networks where the wireless transmit receive unit and/or the base station utilize multi-user detection (MUD). The interference to and from other users is taken into consideration to maximize the desired signal while eliminating or reducing interfering signals, thereby increasing overall system capacity.

    摘要翻译： 一种在无线发射接收单元和/或基站利用多用户检测（MUD）的蜂窝网络中使用的“智能天线”方法和系统。 考虑到来自其他用户的干扰以最大化期望的信号，同时消除或减少干扰信号，从而增加整个系统容量。

    Balancing amplitude and phase
    19.
    发明申请
    Balancing amplitude and phase 有权
    平衡振幅和相位

    公开(公告)号：US20050213691A1

    公开(公告)日：2005-09-29

    申请号：US11126825

    申请日：2005-05-11

    申请人： Fatih Ozluturk ,  Stephen Dick ,  Leonid Kazakevich

    发明人： Fatih Ozluturk ,  Stephen Dick ,  Leonid Kazakevich

    IPC分类号： H04L27/00 ,  H04L27/01 ,  H04L27/22 ,  H04L27/32 ,  H04L27/36

    CPC分类号： H04L27/22 ,  H04L2027/0016 ,  H04L2027/0024

    摘要： A system for balancing a signal having I and Q components includes means for cross correlating the I and Q components to produce a cross correlation product; means for adjusting the gain of each I and Q signal component in accordance with said cross correlation product; and means for adding one component with the adjustable gain of the other component to produce a phase-balanced signal.

    摘要翻译： 用于平衡具有I和Q分量的信号的系统包括用于互相关联I和Q分量以产生互相关乘积的装置; 用于根据所述互相关乘积调整每个I和Q信号分量的增益的装置; 以及用于添加具有另一部件的可调增益的一个分量以产生相位平衡信号的装置。