Use of orthogonal or near orthogonal codes in reverse link
    161.
    发明授权
    Use of orthogonal or near orthogonal codes in reverse link 有权
    在反向链路中使用正交或近似正交码

    公开(公告)号:US07529264B2

    公开(公告)日:2009-05-05

    申请号:US11152858

    申请日:2005-06-14

    Abstract: A technique for allowing a first and second group of users to share access to a communication channel such as a wireless radio channel is disclosed. The first group of users can be a group of legacy users such as those that use digital CDMA cellular telephone equipment based on the IS-95 standard. The second group of users can be a group of web surfers that code their transmissions using one of multiple formats. The first group of users can share one modulation structure such as, on a reverse link, using unique phase offsets of a common pseudorandom noise (PN) code. The second group of users can share another modulation structure, but in a manner that is consistent and compatible with the users of the first group. Specifically, the users of the second group may all use the same PN code and code phase offset. Each channel used by the second group of users can be uniquely identified by a corresponding unique orthogonal code.

    Abstract translation: 公开了一种用于允许第一组和第二组用户共享对诸如无线电频道之类的通信信道的接入的技术。 第一组用户可以是一组遗留用户,例如使用基于IS-95标准的数字CDMA蜂窝电话设备的用户。 第二组用户可以是一组网络冲浪者,可以使用多种格式之一对其传输进行编码。 第一组用户可以共享一个调制结构,例如在反向链路上,使用公共伪随机噪声(PN)码的唯一相位偏移。 第二组用户可以共享另一个调制结构,但是以与第一组的用户一致和兼容的方式。 具体来说,第二组的用户都可以使用相同的PN码和码相位偏移。 第二组用户使用的每个信道可以由相应的唯一正交码唯一地标识。

    System and method for controlling signal strength over a reverse link of a CDMA wireless communication system
    163.
    发明授权
    System and method for controlling signal strength over a reverse link of a CDMA wireless communication system 有权
    用于在CDMA无线通信系统的反向链路上控制信号强度的系统和方法

    公开(公告)号:US07496072B2

    公开(公告)日:2009-02-24

    申请号:US09997733

    申请日:2001-11-29

    Abstract: A service option overlay for a CDMA wireless communication in which multiple allocatable subchannels are defined on a reverse link by assigning different code phases of a given long pseudonoise (PN) code to each subchannel. The instantaneous bandwidth needs of each on-line subscriber unit are then met by dynamically allocating additional channel capacity on an as needed basis for each network layer connection. The system efficiently provides a relatively large number of virtual physical connections between the subscriber units and the base stations on the reverse link for extended idle periods such as when computers connected to the subscriber units are powered on, but not presently actively sending or receiving data. These maintenance subchannels permit the base station and the subscriber units to remain in phase and time synchronizm by monitoring power, carrier-to-interference (C/I), or signal-to-noise (SNR) ratios. The power levels over the subchannels is regulated to minimize interference. This in turn allows fast acquisition of additional capacity as needed by allocating additional orthogonal codes within the same code phase and by varying the spreading factor of the codes, as well as by adding additional code phases.

    Abstract translation: 一种用于CDMA无线通信的服务选项覆盖,其中通过向每个子信道分配给定长伪噪声(PN)码的不同码相位,在反向链路上定义多个可分配子信道。 然后通过根据需要基于每个网络层连接动态分配附加信道容量来满足每个在线用户单元的瞬时带宽需求。 系统有效地在用户单元和反向链路上的基站之间提供相对大量的虚拟物理连接,用于延长的空闲周期,例如当连接到订户单元的计算机被接通而不是当前主动发送或接收数据时。 这些维护子信道允许基站和用户单元通过监视功率,载波干扰(C / I)或信噪比(SNR)比来保持同步和时间同步。 调整子通道的功率电平以最大限度地减少干扰。 这又允许通过在相同代码阶段分配附加正交码并通过改变代码的扩展因子以及通过添加附加代码阶段来快速获取附加容量。

    Directional antenna configuration for TDD repeater
    164.
    发明授权
    Directional antenna configuration for TDD repeater 失效
    TDD中继器的定向天线配置

    公开(公告)号:US07463200B2

    公开(公告)日:2008-12-09

    申请号:US11602455

    申请日:2006-11-21

    CPC classification number: H04B7/1555 H01Q1/38 H01Q7/00 H01Q19/10 H04W88/085

    Abstract: A wireless communication node, such as a repeater, including a frequency translating repeater, a physical layer (PHY) repeater, time divisional duplex repeater (TDD) and the like, is configured with a pair of directional patch antennae and an omni-directional antenna. The patch antennae can be selected depending on the orientation of the repeater package to communicate with a station such as an access point or a base station. The omni-directional antenna can be directed toward another station such as a client. The patch antennae and the omni-directional antenna can be orthogonally polarized to increase isolation and reduce electromagnetic coupling. Multiple antennae can be used in multiple-input-multiple-output (MIMO) configurations.

    Abstract translation: 包括频率转换中继器,物理层(PHY)中继器,时分双工中继器(TDD)等的诸如中继器的无线通信节点被配置有一对定向贴片天线和全向天线 。 可以根据中继器包的方向来选择贴片天线,以与诸如接入点或基站的站进行通信。 全向天线可以被引导到诸如客户端的另一个站。 贴片天线和全向天线可以正交极化,以增加隔离度并减少电磁耦合。 多天线可用于多输入多输出(MIMO)配置。

    Antenna adaptation in a time division duplexing system
    165.
    发明授权
    Antenna adaptation in a time division duplexing system 有权
    时分双工系统中的天线适配

    公开(公告)号:US07308285B2

    公开(公告)日:2007-12-11

    申请号:US10434437

    申请日:2003-05-07

    Abstract: A technique for steering a directional antenna such as may be used with User Equipment (UE) in a wireless communication system. Optimum angle settings for the directional antenna are determined as different values for an uplink and downlink; that is for simple reception and simple transmission. Thus, rather than determine compromised directions that are picked in an attempt to optimize transmission and reception with the same directional setting, directional settings may be optimized independently. The invention is of particular use in a Time Division Duplex (TDD) system where transmit and receive functions can be operating independently at different times. In further aspects, an optimum direction is determined by estimating an interference signal power which is detected from signals emanating from adjacent base stations (access points) and determining a directional setting that minimizes interference to adjacent cells based upon such measurements. A further level of sophistication in antenna angle setting, is to monitor the loading of adjacent cell sites base stations and turning interference and determine the settings accordingly to minimize interference to such heavily loaded neighbors. Further aspects of the invention adapts to acquisition modes that accommodate the directional setting in active use of the system.

    Abstract translation: 用于在无线通信系统中用于指导定向天线的技术,例如可以与用户设备(UE)一起使用。 定向天线的最佳角度设置被确定为上行链路和下行链路的不同值; 这是为了简单的接收和简单的传输。 因此,可以独立地优化方向设置,而不是确定在尝试以相同的方向设置来优化发送和接收的挑选方向。 本发明在时分双工(TDD)系统中特别有用,其中发送和接收功能可以在不同时间独立运行。 在另外的方面,通过估计从相邻基站(接入点)发出的信号中检测到的干扰信号功率,并且基于这样的测量确定最小化对相邻小区的干扰的方向设置来确定最佳方向。 在天线角度设置方面的进一步的复杂程度是监视相邻小区站点基站的负荷和转向干扰,并相应地确定设置以最小化对这种负载较重的邻居的干扰。 本发明的另外的方面适应于在系统的主动使用中适应方向设置的采集模式。

    Reverse link correlation filter in wireless communication systems
    166.
    发明授权
    Reverse link correlation filter in wireless communication systems 有权
    无线通信系统中的反向链路相关滤波器

    公开(公告)号:US07272169B2

    公开(公告)日:2007-09-18

    申请号:US10957928

    申请日:2004-10-04

    Abstract: A single, common correlation filter (CF) core is provided in a wireless system using CDMA. A plurality of channels with different data rates are provided in the wireless system. The channels provided in the wireless system include the access channel, the maintenance channel, and the traffic channel in which information (e.g., pilot or data symbols or both) is transmitted at the tier 1, tier 2 and tier 3 rates. The data rate for transmitting the information is programmable by digital signal processor (DSP). A user-unique code, such as a PN code, is applied to the information being transmitted in the channels of the wireless system. The information is QPSK modulated and transmitted in any one of the channels at any data rate. The transmitted information is correlated at the smallest data rate (i.e., the tier 1 rate) in the correlation filter (CF) of the wireless system by time multiplexing delayed versions of the PN code to the correlation filter core. The correlated information is then demultiplexed and pilot aided QPSK demodulated. The demodulated information is summed at the proper integer multiple of the tier 1 rate to achieve the tier 2 and tier 3 rates. The three strongest multipaths (in terms of the received power) are selected in a window or time period for optimal information recovery. Furthermore, three outputs from the demodulated information can be provided and combined for temporal diversity. Spatial diversity is achieved by providing a plurality of antennas at each receiver and a single, common correlation filter at each of the plurality of antennas of the receivers in the wireless system.

    Abstract translation: 在使用CDMA的无线系统中提供单个公共相关滤波器(CF)核。 在无线系统中提供具有不同数据速率的多个信道。 在无线系统中提供的信道包括接入信道,维护信道和业务信道,信道(例如,导频或数据符号或两者)以层1,层2和层3速率被传输。 用于传输信息的数据速率可由数字信号处理器(DSP)编程。 诸如PN码的用户唯一码被应用于在无线系统的频道中发送的信息。 该信息以任何数据速率在任何一个信道中进行QPSK调制和传输。 所发送的信息通过将PN码的延迟版本时间复用到相关滤波器核心,以无线系统的相关滤波器(CF)中的最小数据速率(即,层1速率)相关。 然后将相关信息解复用并进行导频辅助QPSK解调。 解调信息以1级速率的适当整数倍相加,以实现2级和3级速率。 在窗口或时间段中选择三个最强的多路径(以接收功率计),以获得最佳信息恢复。 此外,可以提供来自解调信息的三个输出并将其组合用于时间分集。 通过在每个接收机处提供多个天线以及在无线系统中的接收机的多个天线的每个天线处提供单个公共相关滤波器来实现空间分集。

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