Multiple-antenna device having an isolation element
    11.
    发明授权
    Multiple-antenna device having an isolation element 有权
    具有隔离元件的多天线装置

    公开(公告)号:US07893889B2

    公开(公告)日:2011-02-22

    申请号:US12563777

    申请日:2009-09-21

    Abstract: A multiple-antenna device is provided, comprising: a printed circuit board having a ground plane configured to provide electromagnetic isolation between a first side of the printed circuit board and a second side of the printed circuit board; a first non-conductive support member formed over the first side of the printed circuit board; a second non-conductive support member formed over the second side of the printed circuit board; a first antenna formed over the first non-conductive support member; and a second antenna formed over the second non-conductive support member, wherein the first antenna is electrically connected to a first feed point on a first portion of the printed circuit board that is not connected to the ground plane, and wherein the second antenna is electrically connected to a second feed point on a second portion of the printed circuit board that is not connected to the ground plane.

    Abstract translation: 提供一种多天线装置,包括:印刷电路板,其具有被配置为在所述印刷电路板的第一侧和所述印刷电路板的第二侧之间提供电磁隔离的接地面; 形成在所述印刷电路板的所述第一侧上的第一非导电支撑构件; 形成在印刷电路板的第二侧上的第二非导电支撑构件; 形成在所述第一非导电支撑构件上的第一天线; 以及形成在所述第二非导电支撑构件上的第二天线,其中所述第一天线电连接到所述印刷电路板的未连接到所述接地平面的第一部分上的第一馈电点,并且其中所述第二天线是 电连接到印刷电路板的未连接到接地平面的第二部分上的第二馈电点。

    System and method for maintaining timing of synchronization messages over a reverse link of a CDMA wireless communication system
    12.
    发明授权
    System and method for maintaining timing of synchronization messages over a reverse link of a CDMA wireless communication system 有权
    用于通过CDMA无线通信系统的反向链路维持同步消息定时的系统和方法

    公开(公告)号:US07773566B2

    公开(公告)日:2010-08-10

    申请号:US10895591

    申请日:2004-07-21

    CPC classification number: H04J13/18 H04B1/7085 H04J13/0022 H04W74/00

    Abstract: A method for operating a subscriber unit that communicates with a code division multiple access (CDMA) wireless network is provided. At the subscriber unit, synchronization information is encoded with a CDMA code. The CDMA encoded synchronization information is transmitted from the subscriber unit in discrete repeating intervals. The discrete repeating intervals are separated by other discrete repeating intervals during which the subscriber unit does not transmit synchronization information.

    Abstract translation: 提供了一种用于操作与码分多址(CDMA)无线网络进行通信的用户单元的方法。 在用户单元处,用CDMA码对同步信息进行编码。 CDMA编码的同步信息以离散的重复间隔从用户单元发送。 离散的重复间隔由用户单元不发送同步信息的其他离散重复间隔隔开。

    Access channel structure for wireless communication system
    15.
    发明授权
    Access channel structure for wireless communication system 有权
    无线通信系统的接入信道结构

    公开(公告)号:US07483473B2

    公开(公告)日:2009-01-27

    申请号:US11103202

    申请日:2005-04-11

    CPC classification number: H04L5/0046 H04B1/707 H04B2201/70701 H04L7/041

    Abstract: A technique for efficient implementation of pilot signals on a reverse link in a wireless communication system. An access channel is defined for the reverse link such that within each frame, or epoch, a portion is dedicated to sending only pilot symbols. Another portion of the frame is reserved for sending mostly data symbols; however, within this second portion of the frame, additional pilot symbols are interleaved among the data symbols. The pilot symbol or preamble portion of the access channel frame allows for efficient acquisition of the access signal at the base station, while providing a timing reference for determining the effects of multipath fading. In particular, a pilot correlation filter provides a phase estimate from the pilot symbols in the preamble portion, which is then used to decode the data symbols in the payload portion. An access acquisition portion of the receiver uses the phase estimates provided by the pilot correlation filter to process the output of a data symbol correlation filter. The additional pilot symbols embedded in the payload portion are used in a cross product operation to further resolve the effects of multipath fading.

    Abstract translation: 一种在无线通信系统中在反向链路上有效实现导频信号的技术。 为反向链路定义了一个接入信道,使得在每个帧或时期内,一部分专用于仅发送导频符号。 帧的另一部分保留用于主要发送数据符号; 然而,在帧的该第二部分内,在数据符号之间交织附加的导频符号。 访问信道帧的导频符号或前导码部分允许在基站处有效地获取接入信号,同时提供用于确定多径衰落的影响的定时参考。 具体地,导频相关滤波器从前导码部分中的导频符号提供相位估计,然后该导频符号用于解码有效载荷部分中的数据符号。 接收机的访问获取部分使用由导频相关滤波器提供的相位估计来处理数据符号相关滤波器的输出。 嵌入在有效载荷部分中的附加导频符号用于交叉乘积运算,以进一步解决多路径衰落的影响。

    Power control protocol for highly variable data rate reverse link of a wireless communication system
    16.
    发明授权
    Power control protocol for highly variable data rate reverse link of a wireless communication system 有权
    用于无线通信系统高可变数据速率反向链路的功率控制协议

    公开(公告)号:US07184417B2

    公开(公告)日:2007-02-27

    申请号:US11250727

    申请日:2005-10-14

    Abstract: A technique for implementing closed loop power control in a wireless system using a modulation that requires synchronization over the radio channel, which dynamically assigns coded channels on a demand basis. The technique maintains a proper power level, even when no traffic channels are allocated, by determining a link quality metric based upon the reverse link power received. This determination is made in response to a heartbeat signal sent at a rate which is only sufficiently fast to maintain code phase lock, for example, depending upon the expected maximum rate at which the subscriber unit will travel.

    Abstract translation: 一种用于在无线系统中实现闭环功率控制的技术,其使用需要通过无线电信道进行同步的调制,其基于需求动态地分配编码信道。 即使没有业务信道被分配,该技术通过基于所接收的反向链路功率确定链路质量度量来维持适当的功率电平。 该确定响应于仅以足够快的速率发送的心跳信号,以维持代码锁相,例如,取决于用户单元将要行进的预期最大速率。

    Maintenance link using active/standby request channels

    公开(公告)号:US07079523B2

    公开(公告)日:2006-07-18

    申请号:US09775305

    申请日:2001-02-01

    CPC classification number: H04W56/0085 H04B7/2637

    Abstract: Multiple field units in a CDMA system are synchronized for communication with a base station using shared forward and reverse link channels. In an illustrative embodiment, each field unit is assigned a time slot in a forward link channel to receive messages from the base station. Likewise, each field unit is assigned a time slot on a common reverse link channel for transmitting messages to the base station. Timing alignment and power level control among each of many field units and the base station is achieved by analyzing messages received at the base station in a corresponding time slot as transmitted by each field unit. Thereafter, a message is transmitted from the base station in a corresponding time slot to a particular field unit for adjusting its timing or power level so that future messages transmitted from the field unit are received in the appropriate time slot at the base station at a desired power level. In this way, minimal resources are deployed to maintain communication and precise synchronization between a base station and each of multiple users, minimizing collisions between field units transmitting in adjacent time slots on the reverse link. This method reduces the frequency a field unit must rely on the use of a slotted aloha random access channel according to IS-95.

    Adaptive receive and omnidirectional transmit antenna array
    18.
    发明授权
    Adaptive receive and omnidirectional transmit antenna array 失效
    自适应接收和全向发射天线阵列

    公开(公告)号:US07034759B2

    公开(公告)日:2006-04-25

    申请号:US11076607

    申请日:2005-03-10

    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: 一种仅在接收模式下使用的独立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。

    Qualifying available reverse link coding rates from access channel power setting

    公开(公告)号:US07006483B2

    公开(公告)日:2006-02-28

    申请号:US09792637

    申请日:2001-02-23

    Abstract: Data rate allocation decisions are made for a communications channel, such as a wireless reverse link connection. A first parameter used in this determination is a path loss, which is determined by the following process. First, a message is sent from a first station to a second station, such as on a paging channel. The message indicates a forward Effective Radiated Power (ERP) of a pilot signal transmitted by the first station. The second station then determines the received signal strength of this pilot signal, taking into account receiver gains. The path loss can then be estimated by the second station as the difference between the forward ERP data value that it received and the detected received pilot power. The second station also then preferably determines a transmit power level when transmitting a message back to the first station. This transmit power level information is encoded as a digital data word together with the forward path loss information as calculated by the first station. Upon receipt of these two pieces of information by the first station, the forward path loss estimate as calculated by the second station, and the output power value of the second station, the first station can then determine the amount of excess power available at the field unit. This excess power difference is indicative of the amount of dynamic range available in the transmit power amplifier in the particular second station. With this information, the first station can then make a determination as to whether coding rates which require a higher dynamic range will be acceptable for use by the particular second station.

    Method for allowing multi-user orthogonal and non-orthogonal interoperability of code channels

    公开(公告)号:US07006428B2

    公开(公告)日:2006-02-28

    申请号:US09898514

    申请日:2001-07-03

    Abstract: A technique for allowing a first and second group of users to share access to a communication channel such as a radio channel. A first group of users is typically a legacy group of users such as those using digital CDMA cellular telephone equipment. The second group of users are a group of data users that code their transmissions in different formats optimized for data functionalities. The first group of users 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 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. However, they are uniquely identified such as, for example, assigning each of them a unique orthogonal code.

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