公开(公告)号：US06888805B2

公开(公告)日：2005-05-03

申请号：US09816558

申请日：2001-03-23

申请人： Paul Bender ,  Ahmad Jalali ,  Bruce Judson ,  Roberto Padovani ,  Charles E. Wheatley, III

发明人： Paul Bender ,  Ahmad Jalali ,  Bruce Judson ,  Roberto Padovani ,  Charles E. Wheatley, III

IPC分类号： H04B7/26 ,  H04J3/00 ,  H04W16/02 ,  H04W16/12 ,  H04Q7/00 ,  H04B7/216 ,  H04Q7/20

CPC分类号： H04W16/12 ,  H04B7/2618 ,  H04W16/02

摘要： A “time multiplexed” transmission scheme capable of reducing the amount of interference from other cells operated at the same frequency band. Each cell in a system transmits in designated time intervals (e.g., time slots) during which other interfering cells may be prevented from transmitting. By temporarily “blanking” transmissions from interfering cells during the designated time slots, the amount of interference from these cells is reduced. The improved signal quality may support transmission at a desired or higher data rate, which may not be possible without cell blanking. In one variant, transmissions from the cells are staggered over different time slots. A set of one or more cells may be designated to transmit in each of a number of slot phases. The cells transmit in a staggered manner on these phases to reduce interference. The transmission scheme may be used for a various channel types (e.g., a control channel) and applications.

摘要翻译： “时分复用”传输方案能够减少在相同频带上工作的其他小区的干扰量。 系统中的每个小区以指定的时间间隔（例如，时隙）发送，在该时间间隔期间可以防止其他干扰小区的发射。 通过在指定时隙期间暂时从干扰小区“消隐”传输，减少了来自这些小区的干扰量。 改进的信号质量可以支持以期望的或更高数据速率的传输，这在没有小区消隐的情况下可能是不可能的。 在一个变型中，来自小区的传输在不同的时隙上交错。 可以指定一组一个或多个小区在多个时隙相位中的每一个中进行发送。 小区在这些相位上以交错的方式发送以减少干扰。 传输方案可以用于各种信道类型（例如，控制信道）和应用。

公开(公告)号：US07400606B2

公开(公告)日：2008-07-15

申请号：US10825748

申请日：2004-04-16

申请人： Roberto Padovani ,  Paul E. Bender ,  Ahmad Jalali ,  Bruce Judson ,  Charles E. Wheatley, III

发明人： Roberto Padovani ,  Paul E. Bender ,  Ahmad Jalali ,  Bruce Judson ,  Charles E. Wheatley, III

IPC分类号： H04B7/204

CPC分类号： H04W16/12 ,  H04W16/02

摘要： In a CDMA data communication system capable of variable rate transmission, utilization of beam switching techniques decreases the average interference caused by transmissions of a base station to subscriber stations within a cell, and in neighboring cells. Base stations utilize multiple transmit antennas, each transmitting signals at controlled amplitudes and phases, to form transmit signal corresponding to sector divisions. Data and reference signals are transmitted along sector division beams that alternate according to fixed time slots in order to increase system capacity and data rates by maximizing carrier-to-interference ratios (C/I) measured at subscriber stations.

摘要翻译： 在能够进行可变速率传输的CDMA数据通信系统中，波束切换技术的利用减少了由基站向小区内和相邻小区中的用户台的传输引起的平均干扰。 基站利用多个发射天线，每个发射天线以受控的幅度和相位传输信号，以形成对应于扇区划分的发射信号。 数据和参考信号沿着根据固定时隙交替的扇区分波束传输，以通过最大化在用户台测量的载波干扰比（C / I）来增加系统容量和数据速率。

公开(公告)号：US06751206B1

公开(公告)日：2004-06-15

申请号：US09608173

申请日：2000-06-29

申请人： Roberto Padovani ,  Paul E. Bender ,  Ahmad Jalali ,  Bruce Judson ,  Charles E. Wheatley, III

发明人： Roberto Padovani ,  Paul E. Bender ,  Ahmad Jalali ,  Bruce Judson ,  Charles E. Wheatley, III

IPC分类号： H04B7204

CPC分类号： H04W16/12 ,  H04W16/02

摘要： In a CDMA data communication system capable of variable rate transmission, utilization of beam switching techniques decreases the average interference caused by transmissions of a base station to subscriber stations within a cell, and in neighboring cells. Base stations utilize multiple transmit antennas, each transmitting signals at controlled amplitudes and phases, to form transmit signal corresponding to sector divisions. Data and reference signals are transmitted along sector division beams that alternate according to fixed time slots in order to increase system capacity and data rates by maximizing carrier-to-interference ratios (C/I) measured at subscriber stations.

摘要翻译： 在能够进行可变速率传输的CDMA数据通信系统中，波束切换技术的利用减少了由基站向小区内和相邻小区中的用户台的传输引起的平均干扰。 基站利用多个发射天线，每个发射天线以受控的幅度和相位传输信号，以形成对应于扇区划分的发射信号。 数据和参考信号沿着根据固定时隙交替的扇区分波束传输，以通过最大化在用户台测量的载波干扰比（C / I）来增加系统容量和数据速率。

公开(公告)号：US20100330948A1

公开(公告)日：2010-12-30

申请号：US12493568

申请日：2009-06-29

申请人： Bruce Judson ,  Cong T. Nguyen

发明人： Bruce Judson ,  Cong T. Nguyen

IPC分类号： H04B1/16 ,  H03K5/00

CPC分类号： H03H7/03 ,  H03H7/1775 ,  H03H11/06

摘要： A filter circuit enhances a deficient Q-value in a filter stage and buffers the filter stage from subsequent filter stages using a common active device. A filter circuit includes a first buffered filtering stage including a first Q-deficient filter stage to receive an input signal and a first Q-enhancement buffer stage. The first Q-enhancement buffer stage is coupled to the first Q-deficient filter stage, wherein the first Q-enhancement buffer stage includes a single active device to increase a Q-value of the first Q-deficient filter stage and isolate the first Q-deficient filter stage from any subsequent filter stage. A filtering method includes filtering an input signal in a first Q-deficient filter stage and enhancing a deficient Q-value of the first Q-deficient filter stage with an active device. The method further includes buffering the first Q-deficient filter stage from any subsequent filter stage with the active device.

摘要翻译： 滤波器电路增强滤波器级中的不足的Q值，并且使用公共有源器件来缓冲来自后续滤波器级的滤波器级。 滤波器电路包括第一缓冲滤波级，其包括用于接收输入信号的第一Q缺陷滤波器级和第一Q增强缓冲级。 第一Q增强缓冲级耦合到第一Q缺陷滤波级，其中第一Q增强缓冲级包括单个有源器件，以增加第一Q缺陷滤波级的Q值并隔离第一Q 任何后续过滤阶段的缺陷过滤阶段。 滤波方法包括在第一Q缺陷滤波器级中对输入信号进行滤波，并利用有源器件增强第一Q缺陷滤波器级的缺陷Q值。 该方法还包括用有源器件从任何后续滤波器级缓冲第一Q缺陷滤波器级。

公开(公告)号：US20110069749A1

公开(公告)日：2011-03-24

申请号：US12566479

申请日：2009-09-24

申请人： Aracely Forrester ,  Philip David Coan ,  Paul Draxler ,  Roberto Rimini ,  Bruce Judson ,  Joseph Patrick Burke

发明人： Aracely Forrester ,  Philip David Coan ,  Paul Draxler ,  Roberto Rimini ,  Bruce Judson ,  Joseph Patrick Burke

IPC分类号： H04L27/01

CPC分类号： H04L25/03038 ,  H04L25/0228 ,  H04L25/0242 ,  H04L27/366 ,  H04L2025/03477 ,  H04L2025/03617

摘要： Techniques for correcting for memory effects of a transmitter are described. In an exemplary design, a receiver obtains input samples including a desired signal transmitted by a transmitter having memory effects. The receiver performs nonlinear equalization on the input samples to obtain first equalized samples, performs linear equalization on the input samples to obtain second equalized samples, and determines output samples based on the first and second equalized samples. The nonlinear equalization corrects for the memory effects and nonlinearities of the transmitter and possibly nonlinearities and memory effects of the receiver. The receiver may jointly determine coefficients for both linear and nonlinear equalization based on an adaptive algorithm. The receiver processes (e.g., demodulates and decodes) the output samples to recover data sent in the desired signal by the transmitter.

摘要翻译： 描述用于校正发射机的记忆效应的技术。 在示例性设计中，接收机获得包括由具有记忆效应的发射机发送的期望信号的输入样本。 接收机在输入样本上执行非线性均衡以获得第一均衡样本，对输入样本执行线性均衡以获得第二均衡样本，并且基于第一和第二均衡样本确定输出样本。 非线性均衡校正了发射机的记忆效应和非线性以及接收机的可能的非线性和记忆效应。 接收机可以基于自适应算法共同确定线性和非线性均衡的系数。 接收机处理（例如，解调和解码）输出样本以恢复发射机在所需信号中发送的数据。

公开(公告)号：US20050288034A1

公开(公告)日：2005-12-29

申请号：US11055920

申请日：2005-02-10

申请人： Bruce Judson ,  Christopher Riddle

发明人： Bruce Judson ,  Christopher Riddle

IPC分类号： G01S1/00 ,  G01S5/14 ,  G01S19/48 ,  G01S19/51 ,  H01Q1/24 ,  H01Q3/02 ,  H01Q3/26 ,  H04W64/00 ,  H04W84/06 ,  H04W88/02 ,  H04W88/08 ,  H04Q7/20

CPC分类号： H01Q1/246 ,  G01S3/46 ,  G01S19/51 ,  G01S2205/008 ,  H01Q3/26 ,  H04W64/00 ,  H04W84/06 ,  H04W88/02 ,  H04W88/08

摘要： A novel mobile unit which communicates with a new and advantageous base station. The mobile unit includes a system for generation of position information and a transceiver for transmitting the position information. In the preferred embodiment, the transceiver is a CDMA system and the system for generating position information includes an arrangement for receiving a GPS signal. In the preferred embodiment, a GPS assisted arrangement is employed which is adapted to receive a signal from an airborne platform as well as from a satellite based platform. The inventive base station is adapted to receive position information from a remote unit and provide a received position signal in response thereto. The novel base station is further equipped with a mechanism for directing a beam in response to the received position signal. In the illustrative embodiment, the mechanism for directing the beam is a smart antenna system including an antenna array and a beamforming network for driving the array to output the directed beam.

摘要翻译： 与新的和有利的基站进行通信的新型移动单元。 移动单元包括用于产生位置信息的系统和用于发送位置信息的收发器。 在优选实施例中，收发器是CDMA系统，并且用于产生位置信息的系统包括用于接收GPS信号的装置。 在优选实施例中，采用GPS辅助装置，其适于从机载平台以及基于卫星的平台接收信号。 本发明的基站适于从远程单元接收位置信息并响应于此提供接收到的位置信号。 新型基站还配备有用于响应于接收到的位置信号来引导波束的机构。 在说明性实施例中，用于引导光束的机构是包括用于驱动阵列以输出定向光束的天线阵列和波束成形网络的智能天线系统。