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    • 21. 发明授权
    • Beamforming multiple-input multiple-output wireless techniques using spatial decomposition for frequency division duplex systems
    • 使用分频双工系统的空间分解对多输入多输出无线技术进行波束成形
    • US07876715B1
    • 2011-01-25
    • US12204867
    • 2008-09-05
    • Hang JinYanxin NaLi GuoJohn Grabner
    • Hang JinYanxin NaLi GuoJohn Grabner
    • H04B7/005
    • H04B7/043H04B7/0452
    • Techniques are provided herein to combine the advantages of beamforming with the advantages of multiple-input multiple output (MIMO) technology in a frequency division duplex (FDD) communication system, even when the uplink and downlink frequency separation exceeds the coherent bandwidth of the over-the-air-channels. At a first wireless communication device having M plurality of antennas, a wireless transmission is received that is sent from a second wireless communication device having P plurality of antennas. The first device computes spatial components associated with the transmission received at the M plurality of antennas. The first device selects the N strongest spatial components among the computed spatial components. The first device computes N beamforming weight vectors based on the N strongest spatial components. The first device then computes N MIMO beamforming weight vectors based on the N beamforming weight vectors. The N MIMO beamforming weight vectors are applied to N signal streams to be transmitted via the plurality of antennas of the first device to the plurality of antennas of the second device.
    • 本文提供了技术,即使当上行链路和下行链路频率间隔超过超分辨率的相干带宽时,波束成形的优点与频分双工(FDD)通信系统中的多输入多输出(MIMO)技术的优点相结合, 空中通道。 在具有M个多个天线的第一无线通信装置中,接收从具有多个天线的第二无线通信装置发送的无线传输。 第一设备计算与在M个多个天线处接收的传输相关联的空间分量。 第一个装置在计算的空间分量中选择N个最强的空间分量。 第一个设备基于N个最强的空间分量来计算N个波束成形权重向量。 然后,第一设备基于N个波束形成权重向量来计算N个MIMO波束成形加权向量。 N个MIMO波束成形加权矢量被施加到要经由第一设备的多个天线发送到第二设备的多个天线的N个信号流。
    • 26. 发明申请
    • Frequency reuse for wireless communication system
    • 无线通信系统的频率重用
    • US20060246917A1
    • 2006-11-02
    • US11204493
    • 2005-08-16
    • Hang JinJohn Grabner
    • Hang JinJohn Grabner
    • H04Q7/20
    • H04W16/04H04W16/02H04W16/06H04W28/16
    • A method for improving a frequency utilization efficiency for a wireless communication system having a plurality of cells includes the following steps. At least one primary channel is allocated for each cell, the primary channel being different from that of its neighboring cell. One or more secondary channels are allocated for each cell, which have the same frequencies as their corresponding primary channels but differ in configuration, the secondary channels being different in frequency from the primary channel of the same cell. The secondary channel of the cell is activated for carrying communication traffic when the primary channel of the same cell has a capacity of being used exceeding a predetermined threshold value.
    • 一种用于提高具有多个小区的无线通信系统的频率利用效率的方法包括以下步骤。 为每个小区分配至少一个主要信道,主要信道与其相邻小区的主信道不同。 为每个小区分配一个或多个次要信道,每个小区具有与其相应的主信道相同的频率,但是配置不同,次要信道的频率与同一小区的主信道不同。 当相同小区的主信道具有超过预定阈值的容量时,小区的辅助信道被激活以携带通信业务。