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    • 1. 发明授权
    • Optimal control method for adaptive feedforward linear amplifier
    • 自适应前馈线性放大器的最优控制方法
    • US06232837B1
    • 2001-05-15
    • US09417651
    • 1999-10-14
    • Ki Suk YooSang Gee KangJae Ick ChoiJong Suk Chae
    • Ki Suk YooSang Gee KangJae Ick ChoiJong Suk Chae
    • H03F126
    • H03F1/3229
    • Provided with an optimal control method for an adaptive feedforward linear amplifier that includes an adaptive controller connected to first and second PLLs (Phase Locked Loops) respectively determining frequency bands for a main signal component and a distortion signal component. The adaptive controller adaptively controls control voltages of a first variable phase shifter and a first variable attenuator constituting a main signal cancellation loop and control voltages of a second variable phase shifter and a second variable attenuator constituting an error signal cancellation loop. The optimal control method includes the steps of: (a) after initialization of necessary parameters, reading a strength of an input signal, determining the initial optimal control voltages of the first and second variable phase shifters and the first and second variable attenuators, outputting the corresponding control voltages, and setting the first PLL to read a main signal strength of the main signal cancellation loop; (b) controlling the optimal control voltages of the first variable phase shifter and the first variable attenuator until the main signal strength becomes lower than a first threshold, if the main signal strength exceeds the first threshold; (c) determining the main signal strength read out from the error signal cancellation loop, if the main signal strength is greater than the first threshold, repeat step (b), otherwise; and (d) controlling the optimal control voltages for the second variable phase shifter and the second variable attenuator until the difference between the main signal strength and the distortion signal strength becomes lower than a second threshold, if the difference is greater than the second threshold.
    • 提供了一种用于自适应前馈线性放大器的最佳控制方法,该自适应前馈线性放大器包括连接到分别确定主信号分量和失真信号分量的频带的第一和第二PLL(锁相环)的自适应控制器。 自适应控制器自适应地控制构成主信号消除环路的第一可变移相器和第一可变衰减器的控制电压以及构成误差信号消除环路的第二可变移相器和第二可变衰减器的控制电压。 最优控制方法包括以下步骤:(a)在必要参数初始化之后,读取输入信号的强度,确定第一和第二可变移相器以及第一和第二可变衰减器的初始最佳控制电压,输出 相应的控制电压,并设置第一PLL以读取主信号消除环路的主信号强度; (b)如果主信号强度超过第一阈值,则控制第一可变移相器和第一可变衰减器的最佳控制电压,直到主信号强度变得低于第一阈值为止; (c)确定从误差信号消除回路读出的主信号强度,如果主信号强度大于第一阈值,则重复步骤(b),否则; 以及(d)如果差值大于第二阈值,则控制第二可变移相器和第二可变衰减器的最佳控制电压,直到主信号强度和失真信号强度之间的差变得低于第二阈值。
    • 4. 发明授权
    • Resource allocation method in wireless network
    • 无线网络资源分配方法
    • US08307070B2
    • 2012-11-06
    • US12621045
    • 2009-11-18
    • Wun Cheol JeongJong Moon ChungKi Yong JinSeong Soon JooJong Suk Chae
    • Wun Cheol JeongJong Moon ChungKi Yong JinSeong Soon JooJong Suk Chae
    • G06F15/173
    • H04W40/24H04W72/04H04W84/20Y02D70/122Y02D70/22
    • Provided is a resource allocation method performed in a wireless network formed of a plurality of nodes, the resource allocation method including the operations of forming clusters and electing cluster heads respectively for the clusters; determining whether a node from among the plurality of nodes forming the wireless network is an edge node; if the node is not the edge node according to a result of the determining, collecting link information related to other nodes in a cluster that comprises the node, and delivering the link information to a cluster head of the cluster; and if the node is the edge node according to a result of the determining, otherwise, obtaining link information and scheduling information from an edge node of another cluster within a communication range with the cluster comprising the edge node, and delivering the link information and scheduling information to the cluster head. The resource allocation method decentralizes a load of calculations to several nodes, wherein the load may be centralized to one node in a large ad-hoc network, so that an energy efficiency of the node may be increased, and since the several nodes sequentially perform simple calculation, a total of the resource allocation time may be reduced.
    • 提供了一种在由多个节点形成的无线网络中执行的资源分配方法,所述资源分配方法包括分别形成簇并分别为簇选择簇头的操作; 确定来自形成无线网络的多个节点中的节点是否是边缘节点; 如果所述节点根据确定结果不是所述边缘节点,则收集与包括所述节点的集群中的其他节点相关的链路信息,并将所述链路信息传递到所述集群的集群头; 如果所述节点是根据所述确定结果的所述边缘节点,否则,从与所述边缘节点的所述群集的通信范围内的另一群集的边缘节点获取链接信息和调度信息,并且传递所述链接信息和调度 信息到簇头。 资源分配方法将计算负载分散到若干节点,其中负载可以集中到大型自组织网络中的一个节点,使得节点的能量效率可以增加,并且由于几个节点顺序执行简单 计算时,总共可以减少资源分配时间。
    • 9. 发明授权
    • Microstrip patch array antenna for suppressing side lobes
    • 用于抑制旁瓣的微带贴片阵列天线
    • US06924765B2
    • 2005-08-02
    • US10618542
    • 2003-07-11
    • Haeng Sook RoSoon Ik JeonJong Suk Chae
    • Haeng Sook RoSoon Ik JeonJong Suk Chae
    • H01Q13/08H01Q3/26H01Q21/06H01Q21/22H01Q1/38
    • H01Q3/2617H01Q21/065H01Q21/22
    • A microstrip patch array antenna suppressing side lobes. The microstrip patch array antenna have a plurality of antenna array elements on two-dimensional planar having A axis and B axis for suppressing side lobes, wherein the antenna array elements are linearly arranged in a direction of the A axis by spacing a first predetermined distance between the antenna array elements, the arranged array elements are arranged in a direction of the B axis by spacing a second predetermined distance between the antenna array elements and a predetermined portion of the microstrip patch array antenna having the arranged array elements are horizontally shifted to a predetermined distance. The present invention can reduce leakage of signal or prevent to receive undesired signal and to transmit signals to undesired direction by using the above mentioned array pattern instead of reducing a distance of spacing between antenna elements.
    • 微带贴片阵列天线抑制旁瓣。 微带贴片阵列天线在具有A轴和B轴的二维平面上具有多个天线阵列元件,用于抑制旁瓣,其中天线阵列元件沿着A轴的方向线性排列,间隔第一预定距离 天线阵列元件通过间隔天线阵列元件之间的第二预定距离而布置在B轴的方向上,并且具有排列的阵列元件的微带贴片阵列天线的预定部分水平移位到预定的 距离。 本发明可以减少信号的泄漏或防止接收不期望的信号并通过使用上述阵列图案而将信号发送到不期望的方向,而不是减少天线元件之间的间隔距离。