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    • 2. 发明授权
    • Preamble formats for MIMO wireless communications
    • 用于MIMO无线通信的前导格式
    • US08576695B2
    • 2013-11-05
    • US13593745
    • 2012-08-24
    • Christopher J. HansenJason A. TrachewskyRajendra Tushar MoortiMatthew James FischerChristopher Young
    • Christopher J. HansenJason A. TrachewskyRajendra Tushar MoortiMatthew James FischerChristopher Young
    • H04J3/06
    • H04B7/0667
    • A method for generating a preamble of a frame for a multiple input multiple output (MIMO) wireless communication begins by, for each transmit antenna, generating a carrier detect field. The method continues by, for a first grouping of the transmit antennas, generating a first guard interval, and at least one channel sounding field. Continuing, the method applies cyclical shift prior to transmission via the first grouping of the transmit antennas. When the MIMO wireless communication includes more than the first grouping of the transmit antennas, for another grouping of the transmit antennas. For the another grouping of the transmit antennas, generating at least one other channel sounding field. The method proceeds by generating the first guard interval prior to the at least one other channel sounding field, and applying another cyclical shift prior to transmission via the another grouping of the transmit antennas.
    • 用于生成多输入多输出(MIMO)无线通信的帧的前同步码的方法由每个发射天线开始,生成载波检测场。 对于发射天线的第一组,产生第一保护间隔和至少一个信道探测场,继续该方法。 继续地,该方法在通过发射天线的第一组发射之前应用周期性移位。 当MIMO无线通信包括多于发射天线的第一组时,对于另一组发射天线。 对于发射天线的另一组,产生至少一个其它信道探测场。 该方法通过在至少一个其它信道探测场之前产生第一保护间隔,并且在经由另一组发射天线的传输之前应用另一个循环移位来进行。
    • 3. 发明授权
    • Communications system and method
    • 通信系统和方法
    • US08437750B2
    • 2013-05-07
    • US11638452
    • 2006-12-14
    • Michael FitzgeraldGuy WaughRichard LordMichael GodleyChristopher YoungLiam KennyIan WalterTadhg Crotty
    • Michael FitzgeraldGuy WaughRichard LordMichael GodleyChristopher YoungLiam KennyIan WalterTadhg Crotty
    • H04Q7/20
    • H04W76/11H04Q2213/13098H04Q2213/13103H04Q2213/13109H04Q2213/13141H04Q2213/13217H04W8/02H04W92/12
    • A mobile network comprises remote base transceiver station (BTS) nodes (3, 4) linked with a central base station controller (BSC) node (9). The latter is in turn linked with a mobile switching center (MSC, 10), a visitor location register (VLR, 11), and a home location register (HLR, 8). Mobile stations (2, MS-A, MS-B, and MS-C) are located in the cells of the BTSs (3, 4). The remote nodes (3, 4, 3(a), 4(a)) are connected to the central node BSC (9) over a remote backhaul satellite connection. Calls are routed locally while the central nodes continue to manage calls and services from central feature-rich and typically more reliable switches of a core network. This means that calls set up between subscribers on the same remote node get connected within the remote node but call supervision is still carried out by the central nodes. The features and services of the existing core network are preserved. For example, if the calling subscriber is a pre-paid GSM subscriber and their account runs out during the call a release signal will still be sent from the central node to the remote even though the voice traffic is being handled by the remote node.
    • 移动网络包括与中央基站控制器(BSC)节点(9)链接的远程基站收发台(BTS)节点(3,4)。 后者又与移动交换中心(MSC,10),访问者位置寄存器(VLR,11)和归属位置寄存器(HLR,8)链接。 移动台(2,MS-A,MS-B和MS-C)位于BTS(3,4)的小区中。 远程节点(3,4,3(a),4(a))通过远程回程卫星连接连接到中央节点BSC(9)。 呼叫本地路由,而中央节点继续管理来自核心网络的中心功能丰富且通常更可靠的交换机的呼叫和服务。 这意味着在同一个远程节点的用户之间建立的呼叫在远程节点内连接,但呼叫监控仍由中央节点进行。 现有核心网络的功能和服务得以保留。 例如,如果主叫用户是预付费GSM用户,并且在呼叫期间他们的账户用尽,即使语音流量正在被远程节点处理,释放信号仍将从中央节点发送到远端。
    • 5. 发明授权
    • Power amplifier pre-distortion
    • 功率放大器预失真
    • US08294516B2
    • 2012-10-23
    • US12139634
    • 2008-06-16
    • Christopher YoungElias Simpson
    • Christopher YoungElias Simpson
    • H03F1/26
    • H03F1/3247H03F3/24H03F3/68H03F2200/451H03F2200/468H03F2201/3233
    • The present invention is directed to systems and methods for reducing the distortion of power amplifiers. In particular, methods and systems are described that enable a determination of a pre-distortion correction signal to be determined, which when added to the nominal signal, a reduction in the distortion of the power amplifier results. In addition, methods and systems are described that enable calibration of individual power amplifiers to be accomplished for use with the above described approach. More specifically, the methods and systems are described for use in a MIMO application. These approaches may be applied to on-chip power amplifiers, off-chip power amplifiers, or any combination thereof.
    • 本发明涉及用于减少功率放大器失真的系统和方法。 特别地,描述了使得能够确定要被确定的预失真校正信号的方法和系统,其在添加到标称信号时降低功率放大器结果的失真。 此外,描述了使得能够实现与上述方法一起使用的各个功率放大器的校准的方法和系统。 更具体地,描述了在MIMO应用中使用的方法和系统。 这些方法可以应用于片上功率放大器,片外功率放大器或其任何组合。