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1. 发明申请

US20120286985A1 Interpolation-Based Digital Pre-Distortion Architecture 有权
标题翻译：基于插值的数字预失真架构
公开(公告)号：US20120286985A1
公开(公告)日：2012-11-15
申请号：US13289010
申请日：2011-11-04
申请人： Rajiv Chandrasekaran , George P. Vella-Coleiro
发明人： Rajiv Chandrasekaran , George P. Vella-Coleiro
IPC分类号： H03M1/66
CPC分类号： H03F1/3247 , H03F3/24
摘要： A non-linear amplifier is linearized using interpolation-based digital pre-distortion (DPD). In one embodiment, the digital input signal is interpolated to generate a higher-sample-rate signal that is then pre-distorted. The resulting higher-sample-rate pre-distorted signal is then decimated to generate a final pre-distorted digital signal that is converted into an analog pre-distorted signal by a digital-to-analog converter (DAC) before being applied to the amplifier. In a polyphase embodiment, different versions of the original input digital signal are generated, where each version is then pre-distorted using a different DPD module to generate a different intermediate pre-distorted digital signal. The intermediate pre-distorted signals are filtered and combined to generate the final pre-distorted digital signal. In both embodiments, better linearization (e.g., less aliasing) can be achieved without increasing the sample rate of the DAC and, in the polyphase embodiment, without increasing the processing speed of the DPD modules.
摘要翻译：使用基于插值的数字预失真（DPD）线性化非线性放大器。在一个实施例中，内插数字输入信号以产生然后被预失真的较高采样率信号。然后抽取所得到的较高采样率预失真信号，以产生最终的预失真数字信号，该数字信号在施加到放大器之前由数模转换器（DAC）转换成模拟预失真信号。在多相实施例中，生成不同版本的原始输入数字信号，其中每个版本然后使用不同的DPD模块进行预失真以产生不同的中间预失真数字信号。中间预失真信号被滤波和组合以产生最终的预失真数字信号。在两个实施例中，可以在不增加DAC的采样率的同时在多相实施例中实现更好的线性化（例如，较少的混叠），而不增加DPD模块的处理速度。

2. 发明授权

US08537041B2 Interpolation-based digital pre-distortion architecture 有权
标题翻译：基于插值的数字预失真架构
公开(公告)号：US08537041B2
公开(公告)日：2013-09-17
申请号：US13289010
申请日：2011-11-04
申请人： Rajiv Chandrasekaran , George P. Vella-Coleiro
发明人： Rajiv Chandrasekaran , George P. Vella-Coleiro
IPC分类号： H03M1/66
CPC分类号： H03F1/3247 , H03F3/24
摘要： A non-linear amplifier is linearized using interpolation-based digital pre-distortion (DPD). In one embodiment, the digital input signal is interpolated to generate a higher-sample-rate signal that is then pre-distorted. The resulting higher-sample-rate pre-distorted signal is then decimated to generate a final pre-distorted digital signal that is converted into an analog pre-distorted signal by a digital-to-analog converter (DAC) before being applied to the amplifier. In a polyphase embodiment, different versions of the original input digital signal are generated, where each version is then pre-distorted using a different DPD module to generate a different intermediate pre-distorted digital signal. The intermediate pre-distorted signals are filtered and combined to generate the final pre-distorted digital signal. In both embodiments, better linearization (e.g., less aliasing) can be achieved without increasing the sample rate of the DAC and, in the polyphase embodiment, without increasing the processing speed of the DPD modules.
摘要翻译：使用基于插值的数字预失真（DPD）线性化非线性放大器。在一个实施例中，内插数字输入信号以产生然后被预失真的较高采样率信号。然后抽取所得到的较高采样率预失真信号，以产生最终的预失真数字信号，该数字信号在施加到放大器之前由数模转换器（DAC）转换成模拟预失真信号。在多相实施例中，生成不同版本的原始输入数字信号，其中每个版本然后使用不同的DPD模块进行预失真以产生不同的中间预失真数字信号。中间预失真信号被滤波和组合以产生最终的预失真数字信号。在两个实施例中，可以在不增加DAC的采样率的同时在多相实施例中实现更好的线性化（例如，较少的混叠），而不增加DPD模块的处理速度。

3. 发明授权

US08965454B2 Amplifier system for cell sites and other suitable applications 有权
标题翻译：放大器系统用于小区站点和其他适用的应用
公开(公告)号：US08965454B2
公开(公告)日：2015-02-24
申请号：US12397491
申请日：2009-03-04
申请人： George P. Vella-Coleiro , Josef Ocenasek , Jeffrey G. Strahler , Christopher F. Zappala
发明人： George P. Vella-Coleiro , Josef Ocenasek , Jeffrey G. Strahler , Christopher F. Zappala
IPC分类号： H04M1/00 , H04B1/04 , H04B17/00 , H04B1/02 , H04B7/14 , H04L25/49 , H04L25/03 , H04L27/00 , H03F1/30 , H03F3/68 , H03F3/60 , H01P1/213 , H03F1/32 , H03F3/19 , H03F3/24 , H04B1/00
CPC分类号： H03F3/602 , H01P1/213 , H03F1/3223 , H03F3/19 , H03F3/245 , H03F2200/111 , H03F2200/192 , H03F2200/198 , H03F2200/204 , H03F2200/451 , H04B1/0064
摘要： In one embodiment, an amplifier system has a tap, a delay filter, a linearized amplifier, and a hybrid combiner. The tapped portion of an input signal is amplified by the amplifier, the untapped portion of the input signal is delayed by the delay filter, and the combiner combines the resulting amplified, tapped portion and the delayed, untapped portion to generate an amplified output signal. By re-combining the delayed, untapped portion of the input signal with the amplified, tapped portion, the power of the untapped portion is not lost, and the amplifier does not have to compensate for all of the distortion that would otherwise be associated with the total output power level. Such an amplifier system is applicable, for example, in upgrading an existing GSM cell site to support both GSM communications as well as UMTS communications without degrading GSM operations.
摘要翻译：在一个实施例中，放大器系统具有抽头，延迟滤波器，线性放大器和混合组合器。输入信号的抽头部分由放大器放大，输入信号的未开关部分被延迟滤波器延迟，并且组合器组合所产生的放大的抽头部分和延迟的未开关部分以产生放大的输出信号。通过将输入信号的延迟的未开发部分与放大的抽头部分重新组合，未分配部分的功率不会丢失，并且放大器不必补偿否则将与总输出功率水平。这样的放大器系统例如可用于升级现有GSM小区站点以支持GSM通信以及UMTS通信，而不会降低GSM操作。

4. 发明授权

US5828946A CATV-based wireless communications scheme 失效
标题翻译：基于CATV的无线通信方案
公开(公告)号：US5828946A
公开(公告)日：1998-10-27
申请号：US755508
申请日：1996-11-22
申请人： Farid Feisullin , George P. Vella-Coleiro
发明人： Farid Feisullin , George P. Vella-Coleiro
IPC分类号： H04H60/97 , H04L12/28 , H04W88/08 , H04N7/173
CPC分类号： H04H60/97 , H04L12/2801 , H04W88/085
摘要： Radio frequency (RF) mobile telephone communications signals are converted to cable television (CATV) frequencies for transmission over existing CATV infrastructure. In the upstream path (i.e., from one or more mobile telephones to a base station), multiple receivers (called remote converters) receive and convert RF signals to cable signals. The cable signals from different receivers are combined by a remote cable node and transmitted over tie cable network to tie base station. In order to reduce noise in the combined cable signal, only those remote converters that receive RF signals of sufficient power level will contribute cable signals to the combined signal. This scheme enables the communications network to be configured with a greater number of relatively inexpensive, low-power remote converters for each remote cable node while still maintaining signal integrity.
摘要翻译：射频（RF）移动电话通信信号被转换成有线电视（CATV）频率，以便在现有CATV基础设施上传输。在上游路径（即，从一个或多个移动电话到基站）中，多个接收机（称为远程转换器）接收并将RF信号转换成电缆信号。来自不同接收机的电缆信号由远程电缆节点组合，并通过有线网络传输以连接基站。为了降低组合电缆信号中的噪声，只有接收足够功率电平的RF信号的那些遥控转换器才能将电缆信号提供给组合信号。该方案使通信网络能够为每个远程电缆节点配置更多数量相对便宜的低功率远程转换器，同时仍保持信号完整性。

5. 发明授权

US4825174A Symmetric integrated amplifier with controlled DC offset voltage 失效
标题翻译：具有受控直流失调电压的对称集成放大器
公开(公告)号：US4825174A
公开(公告)日：1989-04-25
申请号：US209462
申请日：1988-06-20
申请人： George P. Vella-Coleiro
发明人： George P. Vella-Coleiro
IPC分类号： H03F3/30 , H03F1/30 , H03F3/345 , H03K5/003 , H03F3/16
CPC分类号： H03F1/306 , H03F1/309
摘要： A symmetric integrated FET amplifier is disclosed which exhibits a DC offset voltage that is insensitive to power supply variations, as well as variations in the threshold voltages of the FETs forming the amplifier. These variations are known to be most prevalent in InP-based FET amplifier arrangements. The symmetry is achieved by using a pair of impedance matching elements in the input stage of the amplifier to essentially match the impedance of the input FET and its load element, and a matching buffer FET and diode level shifting arrangement are used to match similar elements present in the output branch of the amplifier structure. The impedance matching elements, as well as the level shifting diodes, may all be formed with FET structures to minimize fabrication problems. In accordance with the symmetric arrangement of the present invention, the output DC offset voltage will be maintained at zero volts, regardless of the variations noted above. A multistage symmetric amplifier may then be formed simply by directly connecting a number of single stage symmetric amplifiers together in series.

6. 发明申请

US20120286864A1 Linearization in the Presence of Phase Variations 有权
标题翻译：相位变化存在的线性化
公开(公告)号：US20120286864A1
公开(公告)日：2012-11-15
申请号：US13370544
申请日：2012-02-10
申请人： George P. Vella-Coleiro
发明人： George P. Vella-Coleiro
IPC分类号： H03F1/26
CPC分类号： H03F3/24 , H03F1/3247 , H03F1/3294 , H03F2200/336 , H04L27/368
摘要： In one embodiment, a non-linear power amplifier generates an amplified output signal based on a pre-distorted signal generated by a digital pre-distorter based on an input signal. A feedback path generates a feedback waveform based on the amplified output signal. The feedback waveform is aligned in time with the input signal at the waveform level to identify a corresponding reference waveform. The feedback waveform and the corresponding reference waveform are both divided into a plurality of sub-waveforms. Each feedback sub-waveform is independently aligned in phase with its corresponding reference sub-waveform. The resulting plurality of phase-aligned feedback sub-waveforms are then combined to form a hybrid-aligned waveform that is compared to the reference waveform to adaptively update the digital pre-distorter.
摘要翻译：在一个实施例中，非线性功率放大器基于由数字预失真器基于输入信号产生的预失真信号来产生放大的输出信号。反馈路径基于放大的输出信号产生反馈波形。反馈波形与波形电平上的输入信号及时对准，以识别相应的参考波形。反馈波形和相应的参考波形都被分成多个子波形。每个反馈子波形与其对应的参考子波形相位独立对齐。然后将所得到的多个相位对准反馈子波形组合以形成与参考波形进行比较的混合对准波形，以自适应地更新数字预失真器。

7. 发明申请

US20100227599A1 AMPLIFER SYSTEM FOR CELL SITES AND OTHER SUITABLE APPLICATIONS 有权
标题翻译：用于细胞场的放大器系统和其他适用的应用
公开(公告)号：US20100227599A1
公开(公告)日：2010-09-09
申请号：US12397491
申请日：2009-03-04
申请人： George P. Vella-Coleiro , Josef Ocenasek , Jeffrey G. Strahler , Christopher F. Zappala
发明人： George P. Vella-Coleiro , Josef Ocenasek , Jeffrey G. Strahler , Christopher F. Zappala
IPC分类号： H04M3/22 , H04M1/00 , H03F1/00
CPC分类号： H03F3/602 , H01P1/213 , H03F1/3223 , H03F3/19 , H03F3/245 , H03F2200/111 , H03F2200/192 , H03F2200/198 , H03F2200/204 , H03F2200/451 , H04B1/0064
摘要： In one embodiment, an amplifier system has a tap, a delay filter, a linearized amplifier, and a hybrid combiner. The tapped portion of an input signal is amplified by the amplifier, the untapped portion of the input signal is delayed by the delay filter, and the combiner combines the resulting amplified, tapped portion and the delayed, untapped portion to generate an amplified output signal. By re-combining the delayed, untapped portion of the input signal with the amplified, tapped portion, the power of the untapped portion is not lost, and the amplifier does not have to compensate for all of the distortion that would otherwise be associated with the total output power level. Such an amplifier system is applicable, for example, in upgrading an existing GSM cell site to support both GSM communications as well as UMTS communications without degrading GSM operations.
摘要翻译：在一个实施例中，放大器系统具有抽头，延迟滤波器，线性放大器和混合组合器。输入信号的抽头部分由放大器放大，输入信号的未开关部分被延迟滤波器延迟，并且组合器组合所产生的放大的抽头部分和延迟的未开关部分以产生放大的输出信号。通过将输入信号的延迟的未开发部分与放大的抽头部分重新组合，未分配部分的功率不会丢失，并且放大器不必补偿否则将与总输出功率水平。这样的放大器系统例如可用于升级现有GSM小区站点以支持GSM通信以及UMTS通信，而不会降低GSM操作。

8. 发明授权

US5613234A Receive filter using frequency translation for or in cellular telephony base station 失效
标题翻译：使用频率转换或在蜂窝电话基站中接收滤波器
公开(公告)号：US5613234A
公开(公告)日：1997-03-18
申请号：US330889
申请日：1994-10-28
申请人： George P. Vella-Coleiro
发明人： George P. Vella-Coleiro
IPC分类号： H03D7/16 , H04B1/26 , H04B7/00 , H04B1/10
CPC分类号： H04B7/00 , H03D7/163 , H04B1/26
摘要： A device for filtering wide-band signals at radio frequencies is usable either in a base station cellular telephony system or separately. The wide-band signal occupies a total frequency band comprising frequency bands allocated to that signal and a central frequency band extraneous to that wide-band signal. Within the device, the wide-band signal is mixed with a heterodyne wave to translate the signal from RF to IF. The signal at IF is then filtered by two surface acoustic wave (SAW) band-pass filters which have respective pass bands which correspond at IF to the allocated frequency bands of the wide-band signal, and which the SAW filters have the filtering effect of passing with low attenuation signals in those allocated bands while substantially attenuating signals and/or noise in the central extraneous frequency band between those allocated bands. The wide-band signal after being so filtered either remains at IF when supplied from the device or, in a subsequent stage of the device, is again mixed with the heterodyne wave to be restored back to RF. The heterodyne wave may be adjustable in frequency.
摘要翻译：用于在无线电频率上过滤宽带信号的装置可以在基站蜂窝电话系统中或单独使用。宽带信号占据包括分配给该信号的频带和与该宽带信号无关的中心频带的总频带。在器件内，宽带信号与外差波混合，将信号从RF转换为IF。然后通过两个表面声波（SAW）带通滤波器对IF处的信号进行滤波，这两个表面声波（SAW）带通滤波器具有在IF处对应于宽频带信号的分配频带的相应通带，并且SAW滤波器具有滤波效果在那些分配的频带中通过低衰减信号，同时在这些分配频带之间的中央外部频带中的信号和/或噪声基本上衰减。被滤波后的宽带信号在从器件提供时保持为IF，或者在器件的后续阶段再次与外差波混合，以恢复到RF。外差波可能在频率上可调。

9. 发明授权

US5278690A Apparatus and method for synchronizing a plurality of remote transmission and receiving stations and providing automatic gain control of the synchronizing signal 失效
标题翻译：用于同步多个远程发送和接收站并提供同步信号的自动增益控制的装置和方法
公开(公告)号：US5278690A
公开(公告)日：1994-01-11
申请号：US900766
申请日：1992-06-19
申请人： George P. Vella-Coleiro
发明人： George P. Vella-Coleiro
IPC分类号： H04B7/26 , H04J1/06 , H04J14/02 , H04W88/08 , H04B10/08 , H04B10/00 , H04B10/12
CPC分类号： H04W56/0035 , H04B7/2675 , H04J1/065 , H04W88/08 , H04J14/0298 , H04W88/085
摘要： System synchronization is achieved in a system of remote stations serving a particular cell site or base station by combining rf signals transmitted to the base station from the cell site with a reference signal to form a composite signal. This composite signal is used to modulate the output of a base station laser transmitter. The composite signal is transmitted to the remote station where the reference frequency is extracted and used to synchronize the rf circuits of the remote station. Special diagnostic features are built into the remote station transceivers so that equipment functioning may be monitored at the base station.
摘要翻译：通过将从小区站点发送到基站的rf信号与参考信号组合起来，在服务于特定小区站点或基站的远程站系统中实现系统同步，以形成复合信号。该复合信号用于调制基站激光发射机的输出。复合信号被发送到提取参考频率的远程站，并用于同步远程站的rf电路。远程站收发器内置了特殊诊断功能，从而可以在基站监控设备运行。

10. 发明授权

US08792583B2 Linearization in the presence of phase variations 有权
标题翻译：在存在相位变化的情况下进行线性化
公开(公告)号：US08792583B2
公开(公告)日：2014-07-29
申请号：US13370544
申请日：2012-02-10
申请人： George P. Vella-Coleiro
发明人： George P. Vella-Coleiro
IPC分类号： H04K1/02 , H04L27/36 , H03F1/32 , H03F3/24
CPC分类号： H03F3/24 , H03F1/3247 , H03F1/3294 , H03F2200/336 , H04L27/368
摘要： In one embodiment, a non-linear power amplifier generates an amplified output signal based on a pre-distorted signal generated by a digital pre-distorter based on an input signal. A feedback path generates a feedback waveform based on the amplified output signal. The feedback waveform is aligned in time with the input signal at the waveform level to identify a corresponding reference waveform. The feedback waveform and the corresponding reference waveform are both divided into a plurality of sub-waveforms. Each feedback sub-waveform is independently aligned in phase with its corresponding reference sub-waveform. The resulting plurality of phase-aligned feedback sub-waveforms are then combined to form a hybrid-aligned waveform that is compared to the reference waveform to adaptively update the digital pre-distorter.
摘要翻译：在一个实施例中，非线性功率放大器基于由数字预失真器基于输入信号产生的预失真信号来产生放大的输出信号。反馈路径基于放大的输出信号产生反馈波形。反馈波形与波形电平上的输入信号及时对准，以识别相应的参考波形。反馈波形和相应的参考波形都被分成多个子波形。每个反馈子波形与其对应的参考子波形相位独立对齐。然后将所得到的多个相位对准反馈子波形组合以形成与参考波形进行比较的混合对准波形，以自适应地更新数字预失真器。

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