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    Improving the efficiency of power amplifiers in devices using transmit beamforming
    2.
    发明授权
    Improving the efficiency of power amplifiers in devices using transmit beamforming 有权
    提高使用发射波束成形的设备中功率放大器的效率

    公开(公告)号：US06871049B2

    公开(公告)日：2005-03-22

    申请号：US10249063

    申请日：2003-03-13

    申请人： Gary L. Sugar ,  Chandra Vaidyanathan ,  Sifen Luo

    发明人： Gary L. Sugar ,  Chandra Vaidyanathan ,  Sifen Luo

    IPC分类号： H01Q3/28 ,  H03G3/30 ,  H04B1/04 ,  H04B7/005 ,  H04B7/06 ,  H04B7/08 ,  H04L27/26 ,  H04B1/02 ,  H04Q11/12

    CPC分类号： H04W52/42 ,  H01Q3/28 ,  H03G3/3042 ,  H03G3/3089 ,  H04B1/0483 ,  H04B7/0615 ,  H04B7/0617 ,  H04B7/0669 ,  H04B7/0845 ,  H04B7/0857 ,  H04L27/2601

    摘要： Systems and methods for optimizing the efficiency of each of a plurality of power amplifiers that amplify a corresponding one of a plurality of radio frequency signals for transmission by a corresponding one of a plurality of antennas. Using transmit beamforming, the power of each amplified signal output by the power amplifiers may not be the same for all the power amplifiers, and may vary with changes in the communication channel between the transmitting device and receiving device. Each of the plurality of power amplifiers is controlled to operate with one or more operating parameters that optimize the efficiency for an output power level of corresponding ones of the radio frequency signals. By adjusting one or more operating parameters of each power amplifier according to changing requirements (e.g., the destination device and channel conditions), the efficiency of each power amplifier can be optimized. Consequently, one or more of the power amplifiers are operated with one or more operating parameters that reflects the output power actually needed for the corresponding radio frequency signal to be transmitted.

    摘要翻译： 用于优化多个功率放大器中的每一个功率放大器的效率的系统和方法，其放大多个射频信号中的相应一个，用于由多个天线中的相应一个发射。 使用发射波束形成，由功率放大器输出的每个放大信号的功率对于所有功率放大器可能不相同，并且可以随着发射装置和接收装置之间的通信信道的变化而变化。 多个功率放大器中的每一个被控制为利用一个或多个操作参数进行操作，该操作参数优化对应的一个射频信号的输出功率电平的效率。 通过根据变化的要求（例如，目的地设备和信道条件）调整每个功率放大器的一个或多个操作参数，可以优化每个功率放大器的效率。 因此，一个或多个功率放大器通过一个或多个反映要发射的相应射频信号实际需要的输出功率的工作参数来操作。

    Control of power amplifiers in devices using transmit beamforming
    3.
    发明授权
    Control of power amplifiers in devices using transmit beamforming 有权
    使用发射波束成形的设备中功率放大器的控制

    公开(公告)号：US07899414B2

    公开(公告)日：2011-03-01

    申请号：US12506813

    申请日：2009-07-21

    申请人： Gary L. Sugar ,  Chandra Vaidyanathan ,  Sifen Luo

    发明人： Gary L. Sugar ,  Chandra Vaidyanathan ,  Sifen Luo

    IPC分类号： H04B1/04

    CPC分类号： H04W52/42 ,  H01Q3/28 ,  H03G3/3042 ,  H03G3/3089 ,  H04B1/0483 ,  H04B7/0615 ,  H04B7/0617 ,  H04B7/0669 ,  H04B7/0845 ,  H04B7/0857 ,  H04L27/2601

    摘要： A radio transmitter and method controls efficiency of each of a plurality of power amplifiers that amplify a corresponding one of a plurality of radio frequency signals for a beamforming transmission by a corresponding one of a plurality of antennas. Each of the plurality of power amplifiers is controlled to operate with one or more operating parameters that optimize the efficiency for an output power level of corresponding ones of the radio frequency signals. Transmit weights for transmit signals are determined and updated on a per-packet basis.

    摘要翻译： 无线电发射机和方法控制多个功率放大器中的每一个的效率，所述功率放大器通过多个天线中的相应一个放大用于波束成形传输的多个射频信号中的相应一个。 多个功率放大器中的每一个被控制为利用一个或多个操作参数进行操作，该操作参数优化对应的一个射频信号的输出功率电平的效率。 基于每个分组确定和更新发送信号的发送权重。

    CONTROL OF POWER AMPLIFIERS IN DEVICES USING TRANSMIT BEAMFORMING
    6.
    发明申请
    CONTROL OF POWER AMPLIFIERS IN DEVICES USING TRANSMIT BEAMFORMING 有权
    使用发射波束对设备中的功率放大器进行控制

    公开(公告)号：US20090285331A1

    公开(公告)日：2009-11-19

    申请号：US12506813

    申请日：2009-07-21

    申请人： Gary L. Sugar ,  Chandra Vaidyanathan ,  Sifen Luo

    发明人： Gary L. Sugar ,  Chandra Vaidyanathan ,  Sifen Luo

    IPC分类号： H04L25/03

    CPC分类号： H04W52/42 ,  H01Q3/28 ,  H03G3/3042 ,  H03G3/3089 ,  H04B1/0483 ,  H04B7/0615 ,  H04B7/0617 ,  H04B7/0669 ,  H04B7/0845 ,  H04B7/0857 ,  H04L27/2601

    摘要： A radio transmitter and method controls efficiency of each of a plurality of power amplifiers that amplify a corresponding one of a plurality of radio frequency signals for a beamforming transmission by a corresponding one of a plurality of antennas. Each of the plurality of power amplifiers is controlled to operate with one or more operating parameters that optimize the efficiency for an output power level of corresponding ones of the radio frequency signals. Transmit weights for transmit signals are determined and updated on a per-packet basis.

    摘要翻译： 无线电发射机和方法控制多个功率放大器中的每一个的效率，所述功率放大器通过多个天线中的相应一个放大用于波束成形传输的多个射频信号中的相应一个。 多个功率放大器中的每一个被控制为利用一个或多个操作参数进行操作，该操作参数优化对应的一个射频信号的输出功率电平的效率。 基于每个分组确定和更新发送信号的发送权重。

    Techniques for correcting for phase and amplitude offsets in a MIMO radio device
    7.
    发明授权
    Techniques for correcting for phase and amplitude offsets in a MIMO radio device 失效
    用于校正MIMO无线电设备中的相位和幅度偏移的技术

    公开(公告)号：US07236750B2

    公开(公告)日：2007-06-26

    申请号：US10859255

    申请日：2004-06-02

    申请人： Chandra Vaidyanathan ,  Gary L. Sugar

    发明人： Chandra Vaidyanathan ,  Gary L. Sugar

    IPC分类号： H04B1/40

    CPC分类号： H04B7/04 ,  H01Q3/2605 ,  H04B1/0003 ,  H04B1/0475 ,  H04B1/0483 ,  H04B17/21

    摘要： Techniques to correct for phase and amplitude mismatches in a radio device in order to maintain channel symmetry when communicating with another device using MIMO radio communication techniques. Correction for the amplitude and phase mismatches among the plurality of transmitters and plurality of receivers of a device may be made at baseband using digital logic (such as in the modem) in the receiver path, the transmitter path or both paths of that device. In a device, amplitude and phase offsets are determined among the plurality of radio transmitter and radio receiver paths by measuring phase and amplitude responses when supplying a signal to a transmitter in a first antenna path of the device and coupling the radio signal from a first antenna to a second antenna path of that device where the signal is downconverted by a receiver associated with the second antenna path, and similarly coupling a signal from the second antenna path to the first antenna path. Measurements are obtained between the first antenna path and each of the other antenna paths when coupling a signal in both directions between them. Phase and amplitude offset correction values are computed from the phase and amplitude measurements during a self-calibration operation or mode of the device, and are used during a run-time operation or mode when processing the baseband transmit and/or receive signals to compensate for the phase and amplitude offsets among the plurality of transceiver paths of a device. Amplitude offset correction may not be necessary (or optional) for certain radio implementations or MIMO radio algorithms. The device may execute the self-calibration mode on device power-up, and then periodically thereafter. Self-calibration may also be performed at the factory on a device.

    摘要翻译： 用于校正无线电设备中的相位和幅度失配的技术，以便在使用MIMO无线电通信技术与另一设备通信时保持信道对称性。 在设备的多个发射机和多个接收机之间的幅度和相位不匹配的校正可以使用数字逻辑（例如在调制解调器中）在接收机路径，发射机路径或该设备的两个路径中进行。 在设备中，通过在设备的第一天线路径中向发射机提供信号并且将来自第一天线的无线电信号耦合时测量相位和幅度响应，在多个无线电发射机和无线电接收机路径中确定幅度和相位偏移 到该设备的第二天线路径，其中信号由与第二天线路径相关联的接收机下变频，并且类似地将来自第二天线路径的信号耦合到第一天线路径。 当在它们之间的两个方向上耦合信号时，在第一天线路径和每个其他天线路径之间获得测量。 在设备的自校准操作或模式期间，从相位和幅度测量中计算相位和幅度偏移校正值，并且在处理基带发射和/或接收信号的运行时操作或模式期间使用相位和振幅偏移校正值，以补偿 设备的多个收发器路径之间的相位和幅度偏移。 某些无线电实现或MIMO无线电算法可能不需要（或可选）幅度偏移校正。 设备可以在设备上电时执行自校准模式，然后定期执行。 自校准也可以在工厂在设备上进行。

    System and method for multiple-input multiple-output (MIMO) radio communication
    8.
    发明授权
    System and method for multiple-input multiple-output (MIMO) radio communication 有权
    用于多输入多输出（MIMO）无线电通信的系统和方法

    公开(公告)号：US07194237B2

    公开(公告)日：2007-03-20

    申请号：US10627537

    申请日：2003-07-25

    申请人： Gary L. Sugar ,  Chandra Vaidyanathan

    发明人： Gary L. Sugar ,  Chandra Vaidyanathan

    IPC分类号： H04B1/02 ,  H04M1/00

    CPC分类号： H04B7/0434 ,  H04B7/0465 ,  H04B7/0615 ,  H04B7/0697

    摘要： A system, method and device for MIMO radio communication of multiple signals between a first device having N plurality of antennas and a second device having M plurality of antennas. At the first device, a vector s representing L signals [s1 . . . sL] to be transmitted is processed with a transmit matrix A to maximize capacity of the channel between the first device and the second device subject to a power constraint that the power emitted by each of the N antennas is less than or equal to a maximum power. The power constraint for each antenna may be the same for all antennas or specific or different for each antenna. For example, the power constraint for each antenna may be equal to a total maximum power emitted by all of the N antennas combined divided by N. The transmit matrix A distributes the L signals [s1 . . . sL] among the N plurality of antennas for simultaneous transmission to the second device. At the second device, the signals received by the M plurality of antennas are processed with receive weights and the resulting signals are combined to recover the L signals.

    摘要翻译： 一种用于在具有N个多个天线的第一设备和具有M个多个天线的第二设备之间的多个信号的MIMO无线电通信的系统，方法和设备。 在第一设备处，表示L个信号[s 1]的向量s。 。 。 要发送的信号将被发送矩阵A处理，以使第一设备和第二设备之间的信道的容量达到最大限度的功率约束，N个天线中的每一个发射的功率是 小于或等于最大功率。 每个天线的功率约束对于所有天线可以是相同的，对于每个天线可以是特定的或不同的。 例如，每个天线的功率约束可以等于由N个天线组合所发射的总和最大功率除以N。发射矩阵A分配L个信号[s 1]。 。 。 在N个多个天线之间用于同时发送到第二设备。 在第二设备处，由M个多个天线接收的信号用接收权重进行处理，并将所得到的信号组合以恢复L个信号。