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    • 4. 发明申请
    • SMART ANTENNA ARRAY OVER FIBER
    • 智能天线阵列在光纤上
    • WO2007146175A3
    • 2008-05-15
    • PCT/US2007013597
    • 2007-06-08
    • POWERWAVE TECHNOLOGIES INCVASSILAKIS BILLRABINOVICH ALEXANDERHUNTON MATTHEW J
    • VASSILAKIS BILLRABINOVICH ALEXANDERHUNTON MATTHEW J
    • H01Q3/00
    • H01Q3/267H01Q1/246H01Q3/2676H01Q21/0025
    • A smart antenna system (100) includes a plurality of antennas (102), a plurality of Transmit - Receive Modules (TRMs) (112) coupled respectively to the plurality of antennas, and a beam steering module (116) coupled to the plurality of TRMs and providing radiation beam steering for the plurality of TRMs. The beam steering module (116) includes a pilot generator (316) for generating a pilot signal and providing it to the TRMs (112) to calibrate a receive (RX) reference plane. The pilot signal is injected at a first location before the receiver section into the RX path, and the pilot signal is sampled at a second location after the receiver section. The TRMs (112) and the beam steering module (116) can also be used to calibrate a transmit (TX) reference plane by sampling output signals from the TRMs. The output signals have a pilot signal component, and are sampled at the first location in the TX path after the transmitter section.
    • 智能天线系统(100)包括多个天线(102),分别耦合到多个天线的多个发射 - 接收模块(TRM)(112)和耦合到多个天线的波束导向模块 TRM并为多个TRM提供辐射束转向。 波束转向模块(116)包括用于产生导频信号并将其提供给TRM(112)以校准接收(RX)参考平面的导频发生器(316)。 导频信号在接收机部分之前的第一位置被注入到RX路径中,并且在接收器部分之后的第二位置对导频信号进行采样。 TRM(112)和波束转向模块(116)也可用于通过对来自TRM的输出信号进行采样来校准发​​射(TX)参考平面。 输出信号具有导频信号分量,并且在发射机部分之后的TX路径中的第一位置被采样。
    • 6. 发明申请
    • ENHANCED EFFICIENCY FEED FORWARD POWER AMPLIFIER UTILIZING REDUCED CANCELLATION BANDWIDTH AND SMALL ERROR AMPLIFIER
    • 增强效率的前馈功率放大器利用减少的取消带宽和小错误放大器
    • WO2004075397A2
    • 2004-09-02
    • PCT/US2004003847
    • 2004-02-11
    • POWERWAVE TECHNOLOGIES INCGURVICH MARKVASSILAKIS BILLARBAB EZMARAIRABINOVICH ALEXANDER
    • GURVICH MARKVASSILAKIS BILLARBAB EZMARAIRABINOVICH ALEXANDER
    • H03F1/32H03F
    • H03F1/3229H03F1/3247
    • A feed forward power amplifier is disclosed which utilizes three signal cancellation loops. Loop 1 includes a main amplifier (215) and is used to derive a carrier cancelled sample of the main amplifier output. Loop 2 includes an error amplifier (400) used to amplify the carrier cancelled signal derived from Loop 1 operation in order to cancel distortion products generated due to the nonlinear nature of the main amplifier (215). Loop 2 also utilizes a very short Loop 2 delay line (225). A significant efficiency gain is provided due to reduced output power losses associated with the Loop 2 delay line (225). Lower output losses also results in lower distortion levels produced by the main amplifier (2.15). This, in turn, reduces the size and performance requirements placed on the error amplifier (400). A smaller and more efficient error amplifier (400) is employed resulting in further amplifier system efficiency improvement. A spurious signal detector (805) for out-of-band distortion detection and an associated microcontroller (810) for Loop 1 and Loop 2 control are also provided. A third signal cancellation loop is utilized to sample the amplifier output and reduce the carrier level of the signals sampled at the output of the amplifier before providing the sampled output to the spurious signal detector (805). By significantly reducing the carrier power level relative to distortion power levels a cost effective spurious signal detector (805) can be utilized. This also provides a faster conversion time in Loop 2 cancellation and enhanced cancellation of out-of-band distortion products due to a greater useful dynamic range available for the DSP (817) employed in the spurious signal detector (805).
    • 公开了一种利用三个信号消除环路的前馈功率放大器。 环路1包括主放大器(215),并用于导出主放大器输出的载波消除采样。 环路2包括用于放大从环路1操作导出的载波消除信号的误差放大器(400),以便消除由于主放大器(215)的非线性特性而产生的失真产物。 环路2还使用非常短的环路2延迟线(225)。 由于与环路2延迟线(225)相关联的降低的输出功率损耗,提供了显着的效率增益。 较低的输出损耗也会导致主放大器产生的失真电平较低(2.15)。 这又降低了放置在误差放大器(400)上的尺寸和性能要求。 使用更小且更有效的误差放大器(400),导致进一步的放大器系统效率提高。 还提供了用于带外失真检测的杂散信号检测器(805)和用于环路1和环路2控制的相关联的微控制器(810)。 在将采样输出提供给寄生信号检测器(805)之前,利用第三信号消除环路对放大器输出进行采样并降低在放大器的输出处采样的信号的载波电平。 通过相对于失真功率电平显着降低载波功率电平,可以利用成本有效的寄生信号检测器(805)。 由于可用于寄生信号检测器(805)中使用的DSP(817)的更大的有用动态范围,这也提供了循环2消除中的更快的转换时间和带外失真产物的增强的消除。