Adaptive receive and omnidirectional transmit antenna array
    23.
    发明授权
    Adaptive receive and omnidirectional transmit antenna array 有权
    自适应接收和全向发射天线阵列

    公开(公告)号:US06873293B2

    公开(公告)日:2005-03-29

    申请号:US10386393

    申请日:2003-03-10

    Abstract: An adaptive antenna used in a receive only mode with a separate omnidirectional transmit antenna. The arrangement is especially effective for small, handheld wireless devices. The transmit antenna maybe integrated with the receive array by utilizing a horizontally polarized transmit and vertically polarized receiver ray. In other embodiments, the transmit antenna may be physically separate and not integrated with the receive array. In either case there is separate receive and transmit signal port as an interface to radio transceiver equipment. The use of an adaptive antenna in the receive only direction has the potential to increase forward links capacity to levels equal to or greater than reverse link capacity. This allows for a significant increase in the overall number of users that may be active at the same time in a wireless system.

    Abstract translation: 在仅接收模式中使用的具有单独的全向发射天线的自适应天线。 该安排对于小型手持无线设备特别有效。 发射天线可以通过利用水平极化的发射和垂直极化的接收机射线与接收阵列集成。 在其他实施例中,发射天线可以是物理上分离的并且不与接收阵列集成。 在任一种情况下,都有单独的接收和发送信号端口作为无线电收发器设备的接口。 在接收方向上使用自适应天线具有将前向链路容量增加到等于或大于反向链路容量的电平的潜力。 这允许在无线系统中可以同时活动的用户的总数量的显着增加。

    Access probe acknowledgment including collision detection to avoid oversetting initial power level
    24.
    发明授权
    Access probe acknowledgment including collision detection to avoid oversetting initial power level 有权
    访问探测确认,包括碰撞检测,以避免初始功率级别过大

    公开(公告)号:US06545994B2

    公开(公告)日:2003-04-08

    申请号:US09792410

    申请日:2001-02-23

    Abstract: In an illustrative embodiment of the present invention, a first channel is allocated for transmitting sporadically generated messages from multiple field units to a base station. The first channel is preferably divided into time slots in which a field unit transmits an access request message to the base station for establishing a communication link. In response to an access request message, feedback information is provided from the base station to multiple field units indicating whether a collision was detected on the first channel for a message transmitted in a previous time slot. In an instance when a collision is detected, the field unit will re-transmit an access request message at a previous power level setting based on a random back off time. If no collision is detected and the base station fails to transmit an acknowledgment message from the base station to the access requesting field unit, the power output level of the field unit is increased for successive message transmissions until the message is received.

    Abstract translation: 在本发明的说明性实施例中,分配第一信道用于将来自多个场单元的偶发生成的消息发送到基站。 第一信道优选地被划分为时隙,其中,场单元向基站发送接入请求消息以建立通信链路。 响应于访问请求消息,反馈信息从基站提供给多个字段单元,指示在第一信道上是否检测到在先前时隙中发送的消息的冲突。 在检测到冲突的情况下,场单元将基于随机退避时间在先前功率电平设置下重新发送接入请求消息。 如果没有检测到冲突,并且基站无法从基站向接入请求字段单元发送确认消息,则对于连续的消息传输增加了现场单元的功率输出电平,直到接收到消息。

    Adaptive antenna for use in same frequency networks

    公开(公告)号:US06518920B2

    公开(公告)日:2003-02-11

    申请号:US09942257

    申请日:2001-08-28

    CPC classification number: H01Q3/2605 H01Q1/246 H04B7/0874

    Abstract: An antenna apparatus which can increase capacity in a cellular communication system. The antenna operates in conjunction with a mobile subscriber unit and provides a plurality of antenna elements, each coupled to a respective programmable phase shifter. The phase of each antenna element is programmed for optimum reception during, for example, an idle mode which receives a pilot signal. The antenna array creates a beamformer for signals to be transmitted from the mobile subscriber unit, and a directional receiving array to more optimally detect and receive signals transmitted from the base station. By directionally receiving and transmitting signals, multipath fading is greatly reduced as well as intercell interference. Various techniques for determining the proper phase of each antenna element are accommodated.

    Method and apparatus for creating non-interfering signals using non-orthogonal techniques
    26.
    发明授权
    Method and apparatus for creating non-interfering signals using non-orthogonal techniques 有权
    使用非正交技术创建非干扰信号的方法和装置

    公开(公告)号:US06212220B1

    公开(公告)日:2001-04-03

    申请号:US09255956

    申请日:1999-02-23

    CPC classification number: H04J13/0022 H04J13/10

    Abstract: A method and apparatus for creating non-interfering signals to be simultaneously transmitted over a common frequency in a wireless communication systems, such as a CDMA system, without the use of orthogonal codes and/or orthogonal code generation techniques. The system provides a pseudorandom combiner that receives the information signal and a pseudorandom code sequence and combines the information signal with the pseudorandom code sequence to produce the first combined signal. A channel sequence combiner receives the first combined signal and a repetitive maximum length channel sequence and combines these signals to produce a second combined signal. A selector receives the first combined signal, the second combined signal and a repetitive strobe signal, and selects either the first combined signal or the second combined signal to produce a modulated signal based upon a value of the repetitive strobe signal. The channel sequence values are non-orthogonal repetitive series of N bits, and the strobe signal is N+1 bits.

    Abstract translation: 一种在不使用正交码和/或正交码生成技术的情况下,在诸如CDMA系统的无线通信系统中创建要在公共频率上同时发送的非干扰信号的方法和装置。 该系统提供接收信息信号和伪随机码序列的伪随机组合器,并将信息信号与伪随机码序列组合以产生第一组合信号。 信道序列组合器接收第一组合信号和重复最大长度信道序列,并组合这些信号以产生第二组合信号。 选择器接收第一组合信号,第二组合信号和重复选通信号,并且基于重复选通信号的值选择第一组合信号或第二组合信号以产生调制信号。 信道序列值是N比特的非正交重复序列,选通信号是N + 1比特。

    Method and apparatus for allowing soft handoff of a CDMA reverse link utilizing an orthogonal channel structure
    28.
    发明授权
    Method and apparatus for allowing soft handoff of a CDMA reverse link utilizing an orthogonal channel structure 有权
    用于允许利用正交信道结构的CDMA反向链路的软切换的方法和装置

    公开(公告)号:US08676131B2

    公开(公告)日:2014-03-18

    申请号:US13069174

    申请日:2011-03-22

    Abstract: Method and apparatus for base stations and subscriber units allows soft handoff of a CDMA reverse link utilizing an orthogonal channel structure. Subscriber units transmit an orthogonally coded signal over a reverse link to the base stations. A given base station provides timing control of the timing offset of the reverse link signal. Based on at least one criterion, an alignment controller determines that the given base station should hand off timing control to another base station, and a soft handoff process ensues. In response to a command or message for soft handoff of the subscriber unit from the given base station to another base station, the subscriber unit makes a coarse timing adjustment to the timing of the coded signal. The subscriber unit may make fine timing adjustments based on feedback from the base station controlling timing. Multiple base stations may provide power control feedback to the subscriber unit.

    Abstract translation: 用于基站和用户单元的方法和装置允许使用正交信道结构的CDMA反向链路的软切换。 订户单元通过反向链路向基站发送正交编码的信号。 给定基站提供反向链路信号的定时偏移的定时控制。 基于至少一个准则,对准控制器确定给定的基站应该将定时控制切换到另一个基站,并且随后进行软切换处理。 响应于用户单元从给定基站到另一个基站的软切换的命令或消息,用户单元对编码信号的定时进行粗略的定时调整。 用户单元可以基于来自基站控制定时的反馈来进行精确的定时调整。 多个基站可以向用户单元提供功率控制反馈。

    Intelligent backhaul radio with zero division duplexing
    30.
    发明授权
    Intelligent backhaul radio with zero division duplexing 有权
    智能回程无线电与零分割双工

    公开(公告)号:US08422540B1

    公开(公告)日:2013-04-16

    申请号:US13609156

    申请日:2012-09-10

    Abstract: A intelligent backhaul radio is disclosed, which can operate by zero division duplexing for use in PTP or PMP topologies, providing for significant spectrum usage benefits among other benefits. Specific system architectures and structures to enable active cancellation of multiple transmit signals at multiple receivers within a MIMO radio are disclosed. Further disclosed aspects include the adaptive optimization of cancellation parameters or coefficients.

    Abstract translation: 公开了一种智能回程无线电,其可以通过零分割双工来运行以用于PTP或PMP拓扑,从而提供显着的频谱使用益处以及其他益处。 公开了能够在MIMO无线电中的多个接收机处主动取消多个发射信号的具体系统架构和结构。 进一步公开的方面包括消除参数或系数的自适应优化。

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