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    • 1. 发明授权
    • Alternate mobile network cell synchronization
    • 备用移动网络蜂窝小区同步
    • US08010138B2
    • 2011-08-30
    • US11893144
    • 2007-08-15
    • Lauri Kuru
    • Lauri Kuru
    • H04B15/00
    • H04B7/269H04B7/2693
    • A host base transceiver station BTS derives a reference timing signal from a physical layer training signal (such as a preamble) received from a neighbor network node/BTS. Downlink transmissions are then synchronized to the derived reference timing signal. This may be used as a holdover timing mode, such as when the host BTS determines that synchronization from a primary source is no longer reliable. In an embodiment, a reference oscillator of the host BTS is phase locked to the derived reference timing signal. Variations include one or multiple such training signals from one or multiple neighbor BTSs, selecting one BTS when the primary synchronization mechanism fails for several BTSs in the same area, and how to phase lock the oscillator without dithering about the target frequency. Apparatus and computer programs are also detailed.
    • 主机收发台BTS从相邻网络节点/ BTS接收的物理层训练信号(例如前导码)导出参考定时信号。 然后将下行链路传输与导出的参考定时信号同步。 这可以用作保持定时模式,例如当主机BTS确定来自主源的同步不再可靠时。 在一个实施例中,主机BTS的参考振荡器被锁相到导出的参考定时信号。 变化包括来自一个或多个相邻BTS的一个或多个这样的训练信号,当主同步机制对同一区域中的几个BTS进行故障时选择一个BTS,以及如何相位锁定振荡器而不对目标频率进行抖动。 仪器和计算机程序也是详细的。
    • 3. 发明申请
    • Synchronization of terminals in a radio link system
    • 无线电链路系统中终端的同步
    • US20050282570A1
    • 2005-12-22
    • US11212698
    • 2005-08-29
    • Otto PulkkinenJarmo MakinenLauri Kuru
    • Otto PulkkinenJarmo MakinenLauri Kuru
    • H04J3/06H04B7/26H04L7/00H04L12/28H04W56/00H04W92/10H04Q7/20
    • H04W56/0015H04B7/2678H04W92/10
    • The objective of the invention is to increase the potential hop density of single frequency TDD radio links by allowing a set of closely located terminals to use a single channel. This is possible when transmission and reception periods of the terminals are synchronized so that the transmit period of any of the terminals in a terminal group does not overlap with the receive period of any of the terminals in the group. Synchronization is achieved by selecting at least one terminal in a hub site as a super master terminal. This terminal gives timing through a common bus to the rest of the terminals in the group These terminals use the received timing for adjusting their own timing i.e. for adjusting the starting moment and ending moment of the transmission and reception periods in such a manner that none of terminals is sending a burst while another terminal is receiving.
    • 本发明的目的是通过允许一组紧密定位的终端来使用单个信道来增加单频TDD无线电链路的潜在跳跃密度。 这在终端的发送和接收周期是同步的情况下是可能的,使得终端组中的任何终端的发送周期与组中的任何终端的接收周期不重叠。 通过将集线器站点中的至少一个终端选择为超级主终端来实现同步。 该终端通过公共总线给组中的其余终端提供定时。这些终端使用接收到的定时来调整它们自己的定时,即用于调整发送和接收周期的起始时刻和结束时刻,使得没有一个 终端正在发送突发,而另一个终端正在接收。
    • 4. 发明授权
    • Synchronization of terminals in a radio link system
    • 无线电链路系统中终端的同步
    • US06954439B2
    • 2005-10-11
    • US09817886
    • 2001-03-26
    • Otto PulkkinenJarmo MäkinenLauri Kuru
    • Otto PulkkinenJarmo MäkinenLauri Kuru
    • H04J3/06H04B7/26H04L7/00H04L12/28H04W56/00H04W92/10H04J3/00
    • H04W56/0015H04B7/2678H04W92/10
    • The objective of the invention is to increase the potential hop density of single frequency TDD radio links by allowing a set of closely located terminals to use a single channel. This is possible when transmission and reception periods of the terminals are synchronized so that the transmit period of any of the terminals in a terminal group does not overlap with the receive period of any of the terminals in the group. Synchronization is achieved by selecting at least one terminal in a hub site as a super master terminal. This terminal gives timing through a common bus to the rest of the terminals in the group. These terminals use the received timing for adjusting their own timing i.e. for adjusting the starting moment and ending moment of the transmission and reception periods in such a manner that none of terminals is sending a burst while another terminal is receiving.
    • 本发明的目的是通过允许一组紧密定位的终端来使用单个信道来增加单频TDD无线电链路的潜在跳跃密度。 这在终端的发送和接收周期是同步的情况下是可能的,使得终端组中的任何终端的发送周期与组中的任何终端的接收周期不重叠。 通过将集线器站点中的至少一个终端选择为超级主终端来实现同步。 该终端通过公共总线给予组中其余终端的定时。 这些终端使用接收到的定时来调整其自身的定时,即用于调整发送和接收周期的起始时刻和结束时刻,使得终端在另一个终端正在接收时不发送突发。
    • 7. 发明申请
    • Alternate mobile network cell synchronization
    • 备用移动网络蜂窝小区同步
    • US20090047913A1
    • 2009-02-19
    • US11893144
    • 2007-08-15
    • Lauri Kuru
    • Lauri Kuru
    • H04B1/38
    • H04B7/269H04B7/2693
    • A host base transceiver station BTS derives a reference timing signal from a physical layer training signal (such as a preamble) received from a neighbor network node/BTS. Downlink transmissions are then synchronized to the derived reference timing signal. This may be used as a holdover timing mode, such as when the host BTS determines that synchronization from a primary source is no longer reliable. In an embodiment, a reference oscillator of the host BTS is phase locked to the derived reference timing signal. Variations include one or multiple such training signals from one or multiple neighbor BTSs, selecting one BTS when the primary synchronization mechanism fails for several BTSs in the same area, and how to phase lock the oscillator without dithering about the target frequency. Apparatus and computer programs are also detailed.
    • 主机收发台BTS从相邻网络节点/ BTS接收的物理层训练信号(例如前导码)导出参考定时信号。 然后将下行链路传输与导出的参考定时信号同步。 这可以用作保持定时模式,例如当主机BTS确定来自主源的同步不再可靠时。 在一个实施例中,主机BTS的参考振荡器被锁相到导出的参考定时信号。 变化包括来自一个或多个相邻BTS的一个或多个这样的训练信号,当主同步机制对同一区域中的几个BTS进行故障时选择一个BTS,以及如何相位锁定振荡器而不对目标频率进行抖动。 仪器和计算机程序也是详细的。
    • 10. 发明授权
    • Amplitude imbalance compensation of quadrature modulator
    • 正交调制器幅度不平衡补偿
    • US06700453B2
    • 2004-03-02
    • US10173574
    • 2002-06-18
    • Juha HeiskalaLauri Kuru
    • Juha HeiskalaLauri Kuru
    • H03K300
    • H04L27/368H03D3/009H04L2027/0016H04L2027/0018
    • A method and an arrangement for compensating for amplitude imbalance of a quadrature modulator including: determining a first correlation on the basis of a first modulation signal and an output signal of the quadrature modulator; determining a second correlation on the basis of a second modulation signal and the output signal of the quadrature modulator; producing a compensation signal proportional to the amplitude imbalance on the basis of a ratio of the determined correlations and the first and second modulation signals; and processing at least one of the modulation signals of the quadrature modulator with the compensation signal; wherein determining the correlations uses unprocessed modulation signals of the quadrature modulator for determining the correlations.
    • 一种用于补偿正交调制器的幅度不平衡的方法和装置,包括:基于正交调制器的第一调制信号和输出信号确定第一相关; 基于第二调制信号和正交调制器的输出信号确定第二相关; 基于所确定的相关性和第一和第二调制信号的比率产生与幅度不平衡成比例的补偿信号; 以及用所述补偿信号处理所述正交调制器的调制信号中的至少一个; 其中确定相关性使用正交调制器的未处理的调制信号来确定相关性。