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1. 发明申请

US20050270095A1 Paralleling digital-input amplifiers 有权
标题翻译：并联数字输入放大器
公开(公告)号：US20050270095A1
公开(公告)日：2005-12-08
申请号：US10861045
申请日：2004-06-04
申请人： Michael Burke , Josef Ocenasek , Jeffrey Siegel
发明人： Michael Burke , Josef Ocenasek , Jeffrey Siegel
IPC分类号： H03F1/02 , H03F1/34 , H03F1/36 , H03F3/60 , H03F3/68
CPC分类号： H03F1/34 , H03F1/02 , H03F3/602
摘要： Two or more digital-input RF amplifiers are configured in parallel such that a combiner combines their respective outputs to generate a relatively large composite RF output signal. A feedback control architecture minimizes the phase differences between the various amplifier outputs so that the outputs can be efficiently combined. The feedback control can measure the return loss for each amplifier to determine how to adjust each amplifier's phase. In some embodiments, the feedback control can also measure the composite RF output signal for use in phase adjustment. In certain implementations, phase adjustment is implemented by an iterative coarse phase-adjustment mode (e.g., based on either the return loss or the composite output signal) followed by an iterative fine phase-adjustment mode (e.g., based on the return loss).
摘要翻译：两个或多个数字输入RF放大器并联配置，使得组合器组合它们各自的输出以产生相对较大的复合RF输出信号。反馈控制架构最小化各种放大器输出之间的相位差，从而可以有效地组合输出。反馈控制可以测量每个放大器的回波损耗，以确定如何调整每个放大器的相位。在一些实施例中，反馈控制还可以测量用于相位调整的复合RF输出信号。在某些实施方案中，相位调整通过迭代粗略相位调整模式（例如，基于回波损耗或复合输出信号）实现，随后是迭代精细相位调整模式（例如，基于回波损耗）。

2. 发明申请

US20050101267A1 Frequency conversion techniques 失效
标题翻译：变频技术
公开(公告)号：US20050101267A1
公开(公告)日：2005-05-12
申请号：US10704336
申请日：2003-11-07
申请人： Antony Smithson
发明人： Antony Smithson
IPC分类号： H03C3/40 , H04B1/02 , H03C1/52 , H04L27/36
CPC分类号： H03C3/40
摘要： A frequency upconverter using mixers operating on one or more signals and inverted versions thereof and a subtractor, such as a balun, for subtractively combining the mixer outputs to produce an upconverted signal.
摘要翻译：使用在一个或多个信号和其反相版本上操作的混频器的频率上变频器以及用于减法地组合混频器输出以产生上变频信号的减法器（例如平衡 - 不平衡转换器）。

3. 发明申请

US20050040887A1 Amplifier linearization by pre-distorting a decomposed input signal 失效
标题翻译：放大器通过预分解输入信号进行线性化
公开(公告)号：US20050040887A1
公开(公告)日：2005-02-24
申请号：US10646058
申请日：2003-08-22
申请人： Christopher Zappala
发明人： Christopher Zappala
IPC分类号： H03F1/32 , H03F1/26
CPC分类号： H03F1/32 , H03F1/3241 , H03F1/3282
摘要： A power amplifier's complex pre-distortion curve is generated by decomposing a representation of an input signal, processing the resulting decomposed signals using analog techniques, and performing signal re-composition. In one implementation, two different halves of a transfer function corresponding to the amplitude characteristics of the amplifier are separately modeled and then combined to generate a control signal used to control a voltage-controlled attenuator that attenuates the input signal, while two different halves of a transfer function corresponding to the amplifier's phase characteristics are separately modeled and then combined to generate a different control signal used to control a voltage-controlled phase shifter that adjusts the phase of the input signal. The resulting output signal corresponds to an amplitude-and-phase pre-distorted signal that can be applied to linearize a corresponding (high power) amplifier.
摘要翻译：通过分解输入信号的表示，使用模拟技术处理所得到的分解信号，并执行信号重组，产生功率放大器的复合预失真曲线。在一个实现中，对应于放大器的幅度特性的传递函数的两个不同的两半被分别建模，然后被组合以产生用于控制衰减输入信号的电压控制衰减器的控制信号，而两个不同的一半对应于放大器的相位特性的传递函数被分别建模，然后组合以产生用于控制调节输入信号的相位的电压控制移相器的不同控制信号。所得到的输出信号对应于可应用于线性化相应（大功率）放大器的幅相和相位预失真信号。

4. 发明申请

US20040027198A1 Linearizing LINC amplifiers using pre-distortion 失效
标题翻译：使用预失真线性化LINC放大器
公开(公告)号：US20040027198A1
公开(公告)日：2004-02-12
申请号：US10634600
申请日：2003-08-05
申请人： Andrew Corporation, a Delaware corporation
发明人： Rajiv Chandrasekaran , Andrew Dodd
IPC分类号： H03F001/26
CPC分类号： H03F1/3241 , H03F1/0294 , H03F1/26
摘要： An input signal having amplitude information is pre-distorted and converted into two pre-distorted signals without amplitude information. The two pre-distorted signals are separately amplified and then recombined to generate a linearized amplified output signal having amplitude information. The pre-distortion and conversion may be implemented using a pre-distorter and a LINC modulator. Alternatively, the pre-distortion and conversion may be implemented in circuitry that combines the functions of a pre-distorter and a LINC modulator. The amplified, pre-distorted signals are preferably combined using circuitry that provides at least some impedance matching, such as a transformer or a transmission line tee with transmission line stubs.
摘要翻译：具有振幅信息的输入信号被预失真，并且被转换成没有振幅信息的两个预失真信号。两个预失真信号被分别放大，然后重新组合以产生具有振幅信息的线性化放大输出信号。可以使用预失真器和LINC调制器来实现预失真和转换。或者，可以在组合预失真器和LINC调制器的功能的电路中实现预失真和转换。放大的预失真信号优选地使用提供至少一些阻抗匹配的电路来组合，例如变压器或具有传输线存根的传输线T形。

5. 发明申请

US20030227981A1 Digital pre-distortion of input signals for reducing spurious emissions in communication networks 有权
标题翻译：用于减少通信网络中杂散发射的输入信号的数字预失真
公开(公告)号：US20030227981A1
公开(公告)日：2003-12-11
申请号：US10217930
申请日：2002-08-13
申请人： Andrew Corporation, a Delaware Corporation
发明人： George P. Vella-Coleiro , Ruikang Yang
IPC分类号： H04K001/02 , H04L025/03
CPC分类号： H04L27/367
摘要： Pre-distortion, whose magnitudenulland preferably phasenullare frequency-dependent, is applied to an input signal in order to reduce spurious emissions resulting from subsequent amplification of the signal. In preferred embodiments, the pre-distortion technique of the present invention is implemented in combination with the (frequency-independent) magnitude and phase pre-distortion technique described in U.S. patent application Ser. No. 09/395,490 (nullthe '490 applicationnull), where the frequency-dependent pre-distortion corresponds to amplifier distortion that has a magnitude that is proportional to the frequency offset from the carrier frequency and a phase shift of null90null on either side of the carrier frequency. The frequency-dependent pre-distortion is generated by differentiating waveforms corresponding to pre-distortion parameters with respect to time and then applying the resulting differentiated pre-distortion parameters to the input signal. Depending on the implementation, the waveforms may be differentiated in either the analog or digital domain.
摘要翻译：预失真（其幅度优选相位是频率依赖的）被施加到输入信号，以便减少由信号的后续放大引起的杂散发射。在优选实施例中，本发明的预失真技术结合在美国专利申请序列号（S-1）中描述的（频率无关）幅度和相位预失真技术来实现。第09 / 395,490号（“490应用”），其中频率相关的预失真对应于放大器失真，其具有与从载波频率的频率偏移成正比的幅度，并且相位偏移为±90° 载波频率的任一侧。频率相关的预失真是通过相对于时间对与预失真参数相对应的波形进行微分而产生的，然后将所得到的差分预失真参数应用于输入信号。根据实现情况，可以在模拟或数字域中区分波形。

6. 发明申请

US20050136877A1 Frequency offset correction in transmitters and receivers having non-ideal synthesizer channel spacing 有权
标题翻译：具有非理想合成信道间隔的发射机和接收机中的频偏校正
公开(公告)号：US20050136877A1
公开(公告)日：2005-06-23
申请号：US10739549
申请日：2003-12-18
申请人： Dennis Cleary , Carmine Pagano , Hayim Penso , John Rucki
发明人： Dennis Cleary , Carmine Pagano , Hayim Penso , John Rucki
IPC分类号： H03D7/16 , H03J1/00 , H04B1/04 , H04B1/26 , H04B1/40 , H04B15/00 , H04L25/03
CPC分类号： H03J1/005 , H03D7/161
摘要： In a receiver of a transmission system in which the data transmission rate is not an integer multiple of the spacing between transmission channels, a single oscillator is used to generate both the system clock used to process the data signal as well as the mixing signal used to downconvert the received RF signal to an intermediate frequency (IF). The frequency error in the IF signal that results from mixing the RF signal at a less-than-ideal mixing frequency is compensated by selecting an appropriate mixing signal frequency applied when downconverting the IF signal to baseband. In a transmitter, the mixing signal frequency used to upconvert the outgoing baseband signal to IF is selected to pre-compensate for the frequency error resulting from upconverting the IF signal to RF using a less-than-ideal mixing frequency. In either case, the receiver/transmitter can be implemented without having to provide a dedicated reference oscillator for converting signals between RF and IF.
摘要翻译：在其中数据传输速率不是传输信道之间的间隔的整数倍的传输系统的接收机中，使用单个振荡器来产生用于处理数据信号的系统时钟以及用于处理数据信号的混合信号将所接收的RF信号下变频到中频（IF）。通过选择在将IF信号下变频到基带时施加的适当的混频信号频率来补偿在不合理的混频时将RF信号混频所产生的IF信号中的频率误差。在发射机中，选择用于将输出基带信号上变频到IF的混频信号频率，用于对使用不太理想的混频的上变频IF信号导致的频率误差进行预补偿。在任一情况下，可以实现接收机/发射机，而不必提供用于在RF和IF之间转换信号的专用参考振荡器。

7. 发明申请

US20050052241A1 FREQUENCY-SELECTIVE PHASE/DELAY CONTROL FOR AN AMPLIFIER 失效
标题翻译：用于放大器的频率选择相位/延迟控制
公开(公告)号：US20050052241A1
公开(公告)日：2005-03-10
申请号：US10656753
申请日：2003-09-05
申请人： Michael Leffel
发明人： Michael Leffel
IPC分类号： H03F1/32 , H03G3/10
CPC分类号： H03F1/3247 , H03F1/3282 , H03F1/3288
摘要： The insertion phase or delay of an amplifier can be controlled by comparing signals from the amplifier path with signals from a corresponding reference path without requiring the overall signal delay through the reference path to nominally match the overall signal delay through the amplifier path. Amplifier and reference path signals can be combined to form a combined signal whose power is detected using a narrow-band, frequency-selective power detector. For given phase and delay offsets between the amplifier and reference paths, cancellation (i.e., perfectly destructive interference) will occur at a series of different frequencies. By operating the power detector at one of these cancellation frequencies, a variable phase or delay adjuster in the amplifier path can be controlled to minimize the detected power level in order to achieve a desired level of insertion phase for the amplifier, without having to implement an expensive delay element in the reference path.
摘要翻译：可以通过将来自放大器路径的信号与来自对应的参考路径的信号进行比较来控制放大器的插入相位或延迟，而不需要通过参考路径的总体信号延迟，从而名义上匹配通过放大器路径的总体信号延迟。可以将放大器和参考路径信号组合以形成其功率使用窄带，频率选择功率检测器检测的组合信号。对于放大器和参考路径之间的给定相位和延迟偏移，消除（即完全相消干涉）将发生在一系列不同的频率。通过以这些取消频率中的一个操作功率检测器，可以控制放大器路径中的可变相位或延迟调整器以最小化检测到的功率电平，以便实现放大器的期望的插入相位水平，而不必实现参考路径中昂贵的延迟元件。

8. 发明申请

US20030164732A1 Tuning feed-forward amplifiers and the like 失效
标题翻译：调谐前馈放大器等
公开(公告)号：US20030164732A1
公开(公告)日：2003-09-04
申请号：US10374642
申请日：2003-02-26
申请人： Andrew Corporation, a Delaware Corporation
发明人： James A. Bingham
IPC分类号： H03F001/26
CPC分类号： H03F1/3235
摘要： Signal handling equipment, such as a high power amplifier, is implemented with feed-forward compensation circuitry that adjusts the effective operation of the equipment (e.g., linearizes the amplifier). The compensation circuitry includes (i) a nulling loop, which generates an error signal based on the output from the amplifier, and (ii) an error loop, which generates, based on the error signal, a feed-forward compensation signal that is added to the output of the amplifier. The compensation circuitry is tuned by tuning the nulling loop and then iteratively tuning the error loop based on data generated by perturbing the tuning of the nulling loop. In one implementation, data corresponding to the amplitude of the output signal is analyzed to generate metric values that are used to iteratively adjust the tuning of the error loop.
摘要翻译：诸如高功率放大器之类的信号处理设备使用前馈补偿电路实现，该电路调节设备的有效操作（例如，使放大器线性化）。补偿电路包括（i）归零循环，其基于来自放大器的输出产生误差信号，以及（ii）误差环路，其基于误差信号产生前馈补偿信号，该前馈补偿信号被添加到放大器的输出。通过调整归零循环来调整补偿电路，然后基于通过扰乱归零循环的调谐产生的数据迭代地调整误差循环。在一个实现中，分析与输出信号的幅度相对应的数据，以产生用于迭代地调整误差环调谐的量度值。

9. 发明申请

US20040119534A1 MODEL-BASED FEED-FORWARD LINEARIZATION OF AMPLIFIERS 有权
标题翻译：基于模型的放大器的前馈线性化
公开(公告)号：US20040119534A1
公开(公告)日：2004-06-24
申请号：US10322953
申请日：2002-12-18
申请人： Andrew Corporation, a Delaware corporation
发明人： Rajiv Chandrasekaran
IPC分类号： H03F001/26
CPC分类号： H03F1/3229 , H03F1/3247
摘要： The signal generated by a high-power amplifier (HPA) operating in its non-linear region is linearized by an amplifier circuit using feed-forward compensation in which an auxiliary channel relies on a model of the HPA to generate an auxiliary signal that is combined with the HPA output to generate an amplified linearized output signal. The amplifier circuit may be implemented with a pre-distorter in the main amplifier channel to linearize the HPA using both pre-compensation and feed-forward compensation. Using the HPA model in the auxiliary channel enables the auxiliary signal to be generated without directly relying on the HPA output. This enables the amplifier circuit to be implemented without having to delay the high-power HPA output signal prior to being synchronously combined with the auxiliary signal. In preferred embodiments, the auxiliary channel signal is generated using a relatively low-power amplifier operating in its linear region.
摘要翻译：由在其非线性区域中工作的高功率放大器（HPA）产生的信号由使用前馈补偿的放大器电路线性化，其中辅助通道依赖于HPA的型号以产生组合的辅助信号 HPA输出端产生放大的线性化输出信号。放大器电路可以用主放大器通道中的预失真器来实现，以使用预补偿和前馈补偿来线性化HPA。在辅助通道中使用HPA模型可以生成辅助信号，而不需要直接依靠HPA输出。这使得能够实现放大器电路，而不必在与辅助信号同步组合之前延迟高功率HPA输出信号。在优选实施例中，使用在其线性区域中工作的相对低功率放大器来产生辅助信道信号。

10. 发明申请

US20060274865A1 Channel-dependent de-sensing of received signals 失效
公开(公告)号：US20060274865A1
公开(公告)日：2006-12-07
申请号：US11145622
申请日：2005-06-06
申请人： Sridhar Arunachalam
发明人： Sridhar Arunachalam
IPC分类号： H04L27/08 , H04L1/02
CPC分类号： H04L1/20 , H04L27/2647
摘要： A processor capable of independently adding a specified level of noise to each different frequency-based channel signal of a composite signal, where the specified levels of noise for at least two channel signals are different. In one embodiment, the processor operates in the digital domain after the composite signal can been channelized using a single set of time-multiplexed circuitry for all channel signals.

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