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    • 1. 发明授权
    • Systems and methods for implementing large CDMA cell sizes
    • 用于实现大型CDMA小区大小的系统和方法
    • US06577616B1
    • 2003-06-10
    • US09473712
    • 1999-12-29
    • Shahid Rasul ChaudryMuhammad Khaledul IslamHong RenAzeem AhmadThomas Leonard Trevor PlestidNeil McGowanJames Russell WeisertBrian Douglas TroupDavid Andrew TetreauDavid Allan Boettger
    • Shahid Rasul ChaudryMuhammad Khaledul IslamHong RenAzeem AhmadThomas Leonard Trevor PlestidNeil McGowanJames Russell WeisertBrian Douglas TroupDavid Andrew TetreauDavid Allan Boettger
    • H04B7216
    • H04B1/7075H04B7/2628H04B2201/70702H04W24/00H04W74/00H04W76/10
    • Methods and apparatuses are provided for CDMA (code division multiple access) access availability to a large cell area, and for traffic channel establishment. A group of cell site modems are configured to look for access attempts generated in respective complete and/or sectorized circular or annular shaped areas centered at the center of the cell area, the areas collectively covering the cell area. To achieve this, each cell site modem has a local clock and the local clock within the first of the cell site modems is synchronized with a standard network time, and the local clock of each of the subsequent cell site modems is offset by a respective delay with respect to the standard network time which causes the cell site modem to search within its respective annular shaped area. A cell site modem is also made available as a traffic cell site modem and is operable to have its traffic acquisition search window centered at a location of an access attempt. Alternatively, a plurality of traffic cell site modems may be provided, each having dedicated circular or annular coverage areas within the cell. The traffic cell site modems also preferably have a local clock which may be synchronized, either to a standard network time, or to a respective delay which causes it to search in its respective area. Methods and for handing off between circular and annular shaped traffic coverage areas are also provided.
    • 为大容量区域的CDMA(码分多址)访问可用性和业务信道建立提供了方法和装置。 一组小区站点调制解调器被配置为寻找在以小区区域的中心为中心的各个完整和/或分区的圆形或环形区域中产生的访问尝试,区域集中地覆盖小区区域。 为了实现这一点,每个小区站点调制解调器具有本地时钟,并且第一小区站点调制解调器内的本地时钟与标准网络时间同步,并且后续小区站点调制解调器中的每一个的本地时钟被相应的延迟 相对于导致小区现场调制解调器在其各自的环形区域内搜索的标准网络时间。 小区站点调制解调器还可作为业务小区站点调制解调器使用,并且可操作以使其业务获取搜索窗口以访问尝试的位置为中心。 或者,可以提供多个业务小区站点调制解调器,每个业务小区站点调制解调器在小区内具有专用的圆形或环形覆盖区域。 业务小区站点调制解调器还优选地具有可以与标准网络时间同步的本地时钟,或者使得其在其相应区域中搜索的相应延迟。 还提供了在圆形和环形交通覆盖区域之间切断的方法。
    • 6. 发明授权
    • Symbol FFT RACH processing methods and devices
    • 符号FFT RACH处理方法和设备
    • US08634288B2
    • 2014-01-21
    • US13150565
    • 2011-06-01
    • Neil McGowanMarthuinus Willem Da Silveira
    • Neil McGowanMarthuinus Willem Da Silveira
    • H04J11/00
    • H04W74/0833H04L27/265H04L27/2655
    • Methods and devices for extracting a RACH preamble using as input a number of Fast Fourier Transformed symbols, in order to extract a random access channel (RACH) preamble from a signal received in a base station from a user device, in a radio communication system, are provided. An initial cyclic prefix (symbol CP) is removed prior to performing FFT on symbols. After (1) selecting from the FFT of a symbol frequencies corresponding to the RACH band all other non-RACH frequency bins having been set to zero, (2) shifting the signal to baseband and (3) performing a FFT on the baseband signal, a phase adjustment is performed to compensate for group delays due to symbol CP gaps occurring when generating the baseband signal, the phase adjustment being determined individually for each symbol.
    • 用于提取RACH前同步码的方法和装置,以便使用多个快速傅立叶变换符号来输入,以便在无线电通信系统中从用户装置在基站接收的信号中提取随机接入信道(RACH)前导码, 被提供。 在对符号执行FFT之前,删除初始循环前缀(符号CP)。 在(1)从FFT中选择与RACH频带对应的符号频率,所有其他非RACH频率仓已被设置为零,(2)将信号移位到基带,和(3)对基带信号执行FFT, 执行相位调整以补偿由于在生成基带信号时发生的符号CP间隙引起的组延迟,对于每个符号单独确定相位调整。
    • 7. 发明授权
    • Method and apparatus for processing multiple common frequency signals through a single cable using circulators
    • 通过使用循环器的单个电缆处理多个公共频率信号的方法和装置
    • US08599815B2
    • 2013-12-03
    • US12830651
    • 2010-07-06
    • Peter DeaneAbdelgader LegnainNeil McGowanMarthinus Da Silveira
    • Peter DeaneAbdelgader LegnainNeil McGowanMarthinus Da Silveira
    • H04H20/67H04B7/216
    • H04B1/40H04B1/18
    • A method and apparatus for processing multiple signals at a common frequency combined into a single radio frequency cable and subsequently recovering the signals without significant losses, distortion, or cross-talk. The method and apparatus includes processing multiple signals at a common frequency fed through a single radio frequency (RF) cable with or without one or more amplifiers and utilized for either forward or reverse link transmissions. The invention enables a single power amplifier to amplify multiple RF signals that occupy a common frequency channel and after amplification splitting these signals into amplified copies of the originals. The amplified signals may be sent to different antenna ports to illuminate different base station sectors if required. The signal splitting function is performed at the antenna masthead such that this method reduces the number of feeder cables running up the antenna tower by a factor of N, where N is the number of common frequency signals (e.g., the number of sectors) amplified by the single power amplifier. This invention enables a single power amplifier to simultaneously provide all the radio frequency signals necessary to feed a general N input phased array antenna system and form multiple antenna beams uniquely for several individual users simultaneously.
    • 一种用于以合并到单个射频电缆中的共同频率处理多个信号并且随后恢复信号而没有显着损失,失真或串扰的方法和装置。 该方法和装置包括在具有或不具有一个或多个放大器的单个射频(RF)电缆馈送的公共频率处理多个信号,并用于正向或反向链路传输。 本发明使得单个功率放大器可以放大占用公共频率信道的多个RF信号,并且在将这些信号分解成原稿的放大副本之后。 如果需要,放大的信号可以被发送到不同的天线端口以照亮不同的基站扇区。 信号分离功能在天线标头上进行,使得该方法将以天线塔运行的馈电电缆的数量减少N倍,其中N是通过频率信号放大的共频率信号(例如,扇区数) 单功率放大器。 本发明使得单个功率放大器能够同时提供馈送一般N输入相控阵天线系统所必需的所有射频信号,同时为多个个体用户同时形成多个天线波束。
    • 10. 发明授权
    • Methods, testing apparatuses and devices for removing cross coupling effects in antenna arrays
    • 用于去除天线阵列中的交叉耦合效应的方法,测试装置和装置
    • US08913513B2
    • 2014-12-16
    • US13126411
    • 2010-09-24
    • Neil McGowanPeter Deane
    • Neil McGowanPeter Deane
    • H04L12/26H04B7/00H01Q1/52H01Q3/26
    • H01Q1/523H01Q3/2617
    • Methods and devices for removing cross coupling effects between elements of an antenna array (110) are provided. Cross coupling coefficients between all pairs of antenna elements of the antenna array are predetermined to minimize a total power in theoretical null points calculated without considering the cross element effects. A transceiver (100) includes a multiplexing block (105) configured to receive data signals to be transmitted via the antenna elements and to output to at least one of the antenna elements, a sum signal including (i) a data signal, which data signal is designated for the at least one antenna element, and (ii) a linear combination of data signals designated for other antenna elements of the antenna array, each of the data signals in the linear combination being weighted by a respective cross coupling coefficient between the at least one antenna element and an antenna element emitting the each of the data signals.
    • 提供了用于去除天线阵列(110)的元件之间的交叉耦合效应的方法和装置。 预先确定天线阵列的所有天线元件对之间的交叉耦合系数以最小化在不考虑交叉元素效应的情况下计算的理论空点的总功率。 收发器(100)包括多路复用块(105),被配置为接收要通过天线元件传输的数据信号并将至少一个天线元件输出到和信号,该和信号包括(i)数据信号,哪个数据信号 被指定用于至少一个天线元件,以及(ii)被指定用于天线阵列的其他天线元件的数据信号的线性组合,线性组合中的每个数据信号由相应的交叉耦合系数 至少一个天线元件和发射每个数据信号的天线元件。