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1. 发明授权

US10826731B2 Efficient implementation of noise whitening post-compensation for narrowband-filtered signals 有权
公开(公告)号：US10826731B2
公开(公告)日：2020-11-03
申请号：US16146079
申请日：2018-09-28
申请人： Ahmed Mohamed Ibrahim Medra , Hossein Najafi , Zhuhong Zhang
发明人： Ahmed Mohamed Ibrahim Medra , Hossein Najafi , Zhuhong Zhang
IPC分类号： H04L25/03 , H04B1/10
摘要： Apparatus and methods are provided for noise-whitening post-compensation in a receiver. A first apparatus includes a first whitening filter configured to filter a received signal comprising symbols to generate a first filtered signal. The first apparatus further includes a first decision feedback equalizer having an input coupled to an output of the first whitening filter to receive the first filtered signal. The first decision feedback equalizer is configured to apply decision feedback equalization to the first filtered signal to generate estimates for the symbols of the received signal. A second apparatus includes a decision device configured to generate a symbols decision based on a received signal comprising symbols, a noise predictor configured to predict noise in the received signal, and a subtractor configured to subtract the predicted noise from the received signal to generate a symbols estimate.

2. 发明授权

US10135540B2 System and method for Faster-than-Nyquist (FTN) transmission 有权
公开(公告)号：US10135540B2
公开(公告)日：2018-11-20
申请号：US15485272
申请日：2017-04-12
申请人： Ahmed Mohamed Ibrahim Medra , Jeebak Mitra , Lutz Hans-Joachim Lampe
发明人： Ahmed Mohamed Ibrahim Medra , Jeebak Mitra , Lutz Hans-Joachim Lampe
IPC分类号： H04B10/516
摘要： Systems and methods are disclosed that attempt to increase spectral efficiency by using Faster-than-Nyquist (FTN) transmission. In one embodiment, a method at a transmitter includes partitioning bits into K bit streams, obtaining K power scaled symbol streams, combining the K power scaled symbol streams to obtain a stream of transmission symbols, and transmitting the stream of transmission symbols using FTN signaling. At the receiver, the received symbols are partitioned into K symbol streams, and demodulation and decoding is performed by: (i) demodulating and decoding the Kth symbol stream of the K symbol streams to obtain a Kth set of bits; (ii) mapping the Kth set of bits to a Kth set of symbols; and (iii) for each one of k=K−1, . . . , 1: demodulating and decoding a kth symbol stream of the K symbol streams to obtain a kth set of bits. The demodulating and decoding includes performing interference cancellation.

3. 发明授权

US09651592B2 Impedance detector apparatus and method 有权
公开(公告)号：US09651592B2
公开(公告)日：2017-05-16
申请号：US14095169
申请日：2013-12-03
申请人： Russel J. Kerkman , Ahmed Mohamed Sayed Ahmed , Brian J. Seibel , Shiv Gupta , Prathamesh Ramesh Vadhavkar
发明人： Russel J. Kerkman , Ahmed Mohamed Sayed Ahmed , Brian J. Seibel , Shiv Gupta , Prathamesh Ramesh Vadhavkar
IPC分类号： G01R27/02 , G01R27/08 , G01R31/02 , G01R31/42
CPC分类号： G01R27/02 , G01R31/028 , G01R31/42
摘要： Impedance detection methods and systems are presented for automatic computation of an electrical component impedance value at one or more specific frequencies of interest using quadrature voltage and current values generated by quadrature tracking filters based on sensed or measured voltage and current signals or values and a base frequency input.

4. 发明授权

US09548714B2 Power converter with a dynamically configurable controller and output filter 有权
标题翻译：电源转换器配有可动态配置的控制器和输出滤波器
公开(公告)号：US09548714B2
公开(公告)日：2017-01-17
申请号：US12345242
申请日：2008-12-29
申请人： Ahmed Mohamed Abou-Alfotouh , Mirmira Ramarao Dwarakanath , Jeffrey Demski
发明人： Ahmed Mohamed Abou-Alfotouh , Mirmira Ramarao Dwarakanath , Jeffrey Demski
IPC分类号： H02M3/158 , H03H7/01
CPC分类号： H03H7/0115 , H02M3/1582
摘要： A controller and an output filter for a power converter, and a power converter employing at least one of the same. In one embodiment, the controller includes an error amplifier with first and second input terminals coupled to one of an operating characteristic and a reference voltage of the power converter, and a switch configured to couple the first and second input terminals to one of the operating characteristic and the reference voltage as a function of a power conversion mode of the power converter. In one embodiment, the output filter includes an output filter capacitor with a first terminal coupled to a first output terminal of a power converter, and an output filter inductor coupled between a second terminal of the output filter capacitor and a second output terminal of the power converter.
摘要翻译：用于功率转换器的控制器和输出滤波器，以及采用其中至少一个的功率转换器。在一个实施例中，控制器包括误差放大器，其具有耦合到功率转换器的工作特性和参考电压之一的第一和第二输入端子以及被配置为将第一和第二输入端子耦合到工作特性之一的开关以及作为功率转换器的功率转换模式的函数的参考电压。在一个实施例中，输出滤波器包括输出滤波电容器，其具有耦合到功率转换器的第一输出端的第一端子和耦合在输出滤波电容器的第二端子与功率的第二输出端子之间的输出滤波电感器转换器。

5. 发明申请

US20160052349A1 Internal Tire Repair Device and Method 审中-公开
标题翻译：内胎修复装置及方法
公开(公告)号：US20160052349A1
公开(公告)日：2016-02-25
申请号：US14464671
申请日：2014-08-20
申请人： Ziad Ahmed Mohamed Ali Hussein Elsawah
发明人： Ziad Ahmed Mohamed Ali Hussein Elsawah
IPC分类号： B60C19/12 , B29C73/22 , B29C73/16
CPC分类号： B29C73/22 , B29C73/166 , B60C19/122
摘要： A device and method for storing tire repair material in or around the wheel barrel of a tire. Also, a device and a method for repairing a compromised tire using tire repair material stored in or around the wheel barrel of a tire. In some embodiments, the means for storing the tire repair material in or around the wheel barrel may comprise non-interconnected bays. Device embodiments may also comprise a tire repair material applying means (for example, means utilizing some form of propulsion and/or spraying). Thus, in some embodiments, the tire repair material may be applied to a compromised section of the inside surface of the tire, originating from the direction of the wheel barrel. In some embodiments, the device may also comprise a means for detecting a compromised tire and the punctured section thereof, as well as a means for signaling commencement of application of the tire repair material.
摘要翻译：一种用于将轮胎修补材料存储在轮胎的轮筒内或周围的装置和方法。另外，使用存储在轮胎的轮筒内或周围的轮胎修补材料修复受损轮胎的装置和方法。在一些实施例中，用于将轮胎修补材料存储在轮筒内或周围的装置可以包括非互连的间隔。装置实施例还可以包括轮胎修补材料施加装置（例如，利用某种形式的推进和/或喷射的装置）。因此，在一些实施例中，可以将轮胎修补材料施加到来自轮筒的方向的轮胎内表面的折叠部分。在一些实施例中，装置还可以包括用于检测受损轮胎及其穿刺部分的装置，以及用于指示开始施加轮胎修补材料的装置。

6. 发明申请

US20150077167A1 ADAPTIVE ONLINE FILTER FOR DC OFFSET ELIMINATION 有权
标题翻译：适用于直流偏移消除的自适应在线滤波器
公开(公告)号：US20150077167A1
公开(公告)日：2015-03-19
申请号：US14551333
申请日：2014-11-24
申请人： Russel J. Kerkman , Ahmed Mohamed Sayed Ahmed , Brian J. Seibel
发明人： Russel J. Kerkman , Ahmed Mohamed Sayed Ahmed , Brian J. Seibel
IPC分类号： H03H11/04
CPC分类号： H03H11/04 , G01R25/00 , H02M1/4233 , H03F1/565 , H03H7/38 , Y02B70/126
摘要： A phase angle detector with a PLL, a power converter, and a method for reducing offsets in an input signal, in which an adaptive offset processor selectively removes a DC offset component from the input signal to generate a modified signal including a fundamental frequency component and higher order harmonics of the input signal with the DC offset component removed, and the PLL provides a phase angle signal at least partially according to the modified signal.
摘要翻译：具有PLL的相位角检测器，功率转换器和用于减少输入信号中的偏移的方法，其中自适应偏移处理器从输入信号中选择性地去除DC偏移分量，以产生包括基频分量的修正信号，去除DC偏移分量的输入信号的高阶谐波，并且PLL根据修改的信号至少部分地提供相位角信号。

7. 发明授权

US08895477B2 Method for preparing a gelling and viscosifying agent for drilling mud and the product thereof 有权
标题翻译：制备用于钻井泥浆的胶凝和增粘剂及其制品的方法
公开(公告)号：US08895477B2
公开(公告)日：2014-11-25
申请号：US13382489
申请日：2009-10-21
申请人： Mohamad Nasir Bin Mohamad Ibrahim , Mohamed Rashid Ahmed Mohamed Haras , Coswald Stephen Sipaut
发明人： Mohamad Nasir Bin Mohamad Ibrahim , Mohamed Rashid Ahmed Mohamed Haras , Coswald Stephen Sipaut
IPC分类号： C09K8/20 , C08H7/00 , C09K8/035 , C08H8/00
CPC分类号： C09K8/035 , C08H6/00 , C08H8/00
摘要： A method for preparing lignin graft copolymer comprising: reacting lignocellulosic materials with an acrylic compound by bulk condensation under nitrogen atmosphere in the presence of a non-oxidizing strong organic acid as catalyst; separating the reaction mixture to obtain a solid phase mainly containing lignocellulosic materials and a liquid phase containing lignin graft copolymer and unreacted acrylic compound; and removing solvent from the liquid phase to obtain the lignin graft copolymer.
摘要翻译：一种制备木质素接枝共聚物的方法，其包括：在非氧化性强有机酸作为催化剂的存在下，在氮气氛下，使木质纤维素材料与丙烯酸类化合物反应; 分离反应混合物得到主要含有木素纤维素材料和含有木质素接枝共聚物和未反应的丙烯酸化合物的液相的固相; 并从液相中除去溶剂，得到木质素接枝共聚物。

8. 发明申请

US20140003102A1 ADAPTIVE ONLINE FILTER FOR DC OFFSET ELIMINATION 有权
标题翻译：适用于直流偏移消除的自适应在线滤波器
公开(公告)号：US20140003102A1
公开(公告)日：2014-01-02
申请号：US13537993
申请日：2012-06-29
申请人： Russel J. Kerkman , Ahmed Mohamed Sayed Ahmed , Brian J. Seibel
发明人： Russel J. Kerkman , Ahmed Mohamed Sayed Ahmed , Brian J. Seibel
IPC分类号： H02M1/14 , H03L7/08 , H03H11/04
CPC分类号： H03H11/04 , G01R25/00 , H02M1/4233 , H03F1/565 , H03H7/38 , Y02B70/126
摘要： A phase angle detector with a PLL, a power converter, and a method for reducing offsets in an input signal, in which an adaptive offset processor selectively removes a DC offset component from the input signal to generate a modified signal including a fundamental frequency component and higher order harmonics of the input signal with the DC offset component removed, and the PLL provides a phase angle signal at least partially according to the modified signal.
摘要翻译：具有PLL的相位角检测器，功率转换器和用于减少输入信号中的偏移的方法，其中自适应偏移处理器从输入信号中选择性地去除DC偏移分量，以产生包括基频分量的修正信号，去除DC偏移分量的输入信号的高阶谐波，并且PLL根据修改的信号至少部分地提供相位角信号。

9. 发明授权

US08570773B2 Power converter system and method 有权
标题翻译：电源转换器系统及方法
公开(公告)号：US08570773B2
公开(公告)日：2013-10-29
申请号：US12787900
申请日：2010-05-26
申请人： Gary L. Skibinski , Ahmed Mohamed Sayed Ahmed
发明人： Gary L. Skibinski , Ahmed Mohamed Sayed Ahmed
IPC分类号： H02M1/12 , H02M5/45
CPC分类号： H02M5/458 , H02M1/126 , H02M2001/123 , H02P2209/01
摘要： A three-phase power converter includes a converter configured to convert a three phase AC power input to a DC power output, the DC power output being provided to high and low sides of a DC bus, and an inverter coupled to the DC bus and configured to convert the DC power to a three phase AC output. The inverter comprises three legs and each leg comprises a pair of solid state switches and a respective output therebetween. The power converter further includes a common mode voltage control filter comprising three filter inputs and two filter outputs, each filter input coupled to an output of a respective leg of the inverter and each filter output coupled to a respective side of the DC bus.
摘要翻译：三相电力转换器包括转换器，其被配置为将三相AC电力输入转换为DC电力输出，DC功率输出提供给DC总线的高低侧，以及反相器，其连接到DC总线并配置将直流电源转换为三相交流输出。逆变器包括三条腿，每条腿包括一对固态开关和它们之间的相应输出。功率转换器还包括共模电压控制滤波器，其包括三个滤波器输入和两个滤波器输出，每个滤波器输入耦合到反相器的相应支路的输出，并且每个滤波器输出耦合到DC总线的相应侧。

10. 发明申请

US20130249501A1 DOUBLE FED INDUCTION GENERATOR (DFIG) CONVERTER AND METHOD FOR IMPROVED GRID FAULT RIDETHROUGH 有权
标题翻译：双电源感应发电机（DFIG）转换器和改进的电网故障的方法RIDETHROUGH
公开(公告)号：US20130249501A1
公开(公告)日：2013-09-26
申请号：US13430504
申请日：2012-03-26
申请人： Haihui Lu , Zhenhuan Yuan , Lixiang Wei , Russel Kerkman , Richard Lukaszewski , Ahmed Mohamed Sayed Ahmed
发明人： Haihui Lu , Zhenhuan Yuan , Lixiang Wei , Russel Kerkman , Richard Lukaszewski , Ahmed Mohamed Sayed Ahmed
IPC分类号： H02P9/10
CPC分类号： H02P9/006 , F03D7/0224 , F03D7/0284 , F03D7/0288 , F03D7/04 , F03D9/255 , H02H7/06 , H02H7/12 , H02H9/002 , H02J3/386 , H02J2003/001 , H02P9/007 , H02P9/102 , H02P9/48 , H02P2101/15 , Y02E10/723 , Y02E10/763
摘要： A double fed induction generator (DFIG) converter method are presented in which rotor side current spikes are attenuated using series-connected damping resistance in response to grid fault occurrences or grid fault clearances.
摘要翻译：提出了一种双馈感应发电机（DFIG）转换器方法，其中转子侧电流尖峰响应于电网故障发生或电网故障间隙使用串联阻尼电阻衰减。

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