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1. 发明授权

US11108235B1 Double synchronous unified virtual oscillator control for grid-forming and grid-following power electronic converters 有权
公开(公告)号：US11108235B1
公开(公告)日：2021-08-31
申请号：US17173505
申请日：2021-02-11
申请人： North Carolina State University
发明人： M A Awal , Iqbal Husain
IPC分类号： H03B5/10 , H03J7/04 , H03L7/099 , H02J3/24 , H02J3/00 , H03B5/02
摘要： A power electronic converter can utilize exemplary double synchronous unified virtual oscillator control (DSUVOC) logic or circuitry to convert direct current to alternating current that is input into a power grid. An exemplary DSUVOC controller of the present disclosure includes a double synchronous space vector oscillator component, a sequence extraction component, a fault detection component, a pre-synchronization component, a virtual impedance component, a terminal voltage compensation component, and/or an active damping component, wherein the double synchronous unified virtual oscillator controller is capable of controlling a grid following or a grid forming power electronic converter enabling synchronization and fault ride-through under both balanced and unbalanced conditions.

2. 发明授权

US10693442B1 Universal automatic frequency control for multi-channel receivers 有权
公开(公告)号：US10693442B1
公开(公告)日：2020-06-23
申请号：US16655890
申请日：2019-10-17
申请人： Sirius XM Radio Inc.
发明人： Carl Scarpa , Robert Joseph Topper
IPC分类号： H04B1/12 , H03J7/04 , H03J1/00
摘要： Systems and methods for performing automatic frequency control are provided. Instead of relying on individual frequency tuners for each channel of a multi-channel receiver system, the present subject matter uses a single frequency tuner for receiving each channel of the multi-channel receiver system. A locked demodulator may be designated as a reference demodulator and frequency offset values associated with the reference demodulator may be applied to other demodulators of the multi-channel receiver. These frequency offset values may be used by individual demodulators of each channel for correcting corresponding frequency offsets.

3. 发明授权

US10355670B1 Active suppression controller with tracking and correction for multiple time-varying fundamental frequencies 有权
公开(公告)号：US10355670B1
公开(公告)日：2019-07-16
申请号：US15972130
申请日：2018-05-05
申请人： Baisheng Yu
发明人： Baisheng Yu
IPC分类号： H03J7/04 , H03J1/00 , G05B13/04 , G01R19/25 , F16F15/00
摘要： Provided an active suppression controller with an adaptive algorithm capable of tracking the fluctuation of multi-fundamental frequencies and correcting them while the deviation is divergence based on the DXHS (Delayed-X Harmonics Synthesizer). It includes a controller's architecture, an adaptive frequency tracking & correcting algorithm and its FPGA implementation structure in real-time.

4. 发明申请

US20180019771A1 Method and Radio Network Node for Compensation for Local Oscillator Pulling or Pushing 审中-公开
公开(公告)号：US20180019771A1
公开(公告)日：2018-01-18
申请号：US15541032
申请日：2015-01-05
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Yuanjun Xu , Youping Su
IPC分类号： H04B1/04 , H03J7/04 , H03L7/099 , H03L7/197 , H03L7/085 , H04B1/10
CPC分类号： H04B1/0475 , H03J7/04 , H03L7/085 , H03L7/099 , H03L7/1976 , H03L2207/50 , H04B1/1036
摘要： Disclosed is a method and a radio network node for compensating for local oscillator pulling or pushing. The method comprises determining, in a digital domain, a correction phase for the local oscillator to offset a phase error caused by the local oscillator pulling or pushing. The method also comprises correcting a phase of the baseband signal in the digital domain using the correction phase to compensate for the local oscillator pulling or pushing With the proposed method and radio network node, the phase error caused by the local oscillator pulling or pushing could be diminished due to phase correction in the digital domain.

5. 发明授权

US09277425B2 Systems and methods for automatic frequency control for mobile communication systems 有权
标题翻译：用于移动通信系统自动频率控制的系统和方法
公开(公告)号：US09277425B2
公开(公告)日：2016-03-01
申请号：US13783568
申请日：2013-03-04
申请人： Marvell World Trade Ltd.
发明人： Xiaojun Yin , Shiyi Zhu
IPC分类号： H04M1/00 , H04W24/02 , H03J7/04 , H04W88/06
CPC分类号： H04W24/02 , H03J7/04 , H04W88/06
摘要： System and methods are provided for communicating with multiple wireless networks using a mobile communication system. An example mobile communication system includes a first communication device configured to communicate with a first wireless network and generate a reference signal for determining a first frequency deviation between the first communication device and the first wireless network, and a second communication device configured to communicate with a second wireless network and determine a second frequency deviation between the second communication device and the second wireless network based at least in part on the reference signal.
摘要翻译：提供了系统和方法，用于使用移动通信系统与多个无线网络进行通信。一种示例性移动通信系统包括被配置为与第一无线网络通信并生成用于确定第一通信设备和第一无线网络之间的第一频率偏差的参考信号的第一通信设备，以及被配置为与第一无线网络通信的第二通信设备并且至少部分地基于所述参考信号来确定所述第二通信设备和所述第二无线网络之间的第二频率偏差。

6. 发明申请

US20130130637A1 Method of Receiving and Receivers 有权
标题翻译：接收方式
公开(公告)号：US20130130637A1
公开(公告)日：2013-05-23
申请号：US13677866
申请日：2012-11-15
申请人： RENESAS MOBILE CORPORATION
发明人： Jouni Kristian KAUKOVUORI , Aarno Tapio PARSSINEN , Antti Oskari IMMONEN
IPC分类号： H03J7/04
CPC分类号： H03J7/04 , H03D3/009
摘要： A receiver uses a local oscillator to receive data transmitted via a combination of radio frequency signals using carrier aggregation. Each radio frequency signal occupies a respective radio frequency band and the radio frequency hands are arranged in two groups, a first group and a second group, separated in frequency by a first frequency region, each of the groups including one or more radio frequency bands and the first group occupying a wider frequency region than the second group. The radio frequency signals are processed using the local oscillator by setting the local oscillator, during the processing, to a frequency that is offset from the centre of a band defined by outer edges of the frequency regions occupied by the two groups.
摘要翻译：接收机使用本地振荡器来接收通过使用载波聚合的射频信号的组合发送的数据。每个射频信号占据相应的无线电频带，并且射频手被分成两组，第一组和第二组，频率分开第一频率区，每个组包括一个或多个无线电频带，以及第一组占据比第二组更宽的频率区域。使用本地振荡器，通过将本地振荡器在处理期间设置为偏离由两组占据的频率区域的外边缘限定的频带的中心的频率来处理射频信号。

7. 发明申请

US20110080381A1 Portable Control Apparatus and Method Thereof 有权
标题翻译：便携式控制装置及其方法
公开(公告)号：US20110080381A1
公开(公告)日：2011-04-07
申请号：US12844413
申请日：2010-07-27
申请人： Huimin Tsai , Chi Kang Liu
发明人： Huimin Tsai , Chi Kang Liu
IPC分类号： G06F3/038 , H03J7/04
CPC分类号： H03J1/0008 , G06F1/08 , G09G2320/0693 , H03J7/04 , H03L7/06
摘要： A portable control apparatus includes a driver, a baseband controller, and a crystal oscillator. The driver includes an oscillating circuit that generates a feedback signal. The baseband controller coupled to the driver receives the feedback signal, and outputs a calibrating signal to the driver according to the feedback signal. The crystal oscillator coupled to the baseband controller generates an accurate output frequency for operating the baseband controller.
摘要翻译：便携式控制装置包括驱动器，基带控制器和晶体振荡器。驱动器包括产生反馈信号的振荡电路。耦合到驱动器的基带控制器接收反馈信号，并根据反馈信号向驱动器输出校准信号。耦合到基带控制器的晶体振荡器产生用于操作基带控制器的精确输出频率。

8. 发明申请

US20100214025A1 Low jitter and wide-range frequency synthesizer for low voltage operation 有权
标题翻译：低抖动和宽频率频率合成器，用于低电压操作
公开(公告)号：US20100214025A1
公开(公告)日：2010-08-26
申请号：US12656865
申请日：2010-02-18
申请人： Chun-Liang Chen , Hui-Chun Hsu
发明人： Chun-Liang Chen , Hui-Chun Hsu
IPC分类号： H03J7/04 , H03L7/00
CPC分类号： H03L7/183 , H03L7/0995
摘要： A low jitter and wide-range frequency synthesizer for low voltage operation includes a detector to generate a detection signal based on a logic level difference between an input signal and a feedback signal, a charge pump to generate a control signal based on the detection signal, a filter to generate a tuning signal based on the control signal, a bias circuit to generate a first bias signal and a second bias signal based on the tuning signal, a controllable oscillator to generate a differential output signal based on the first and the second bias signals, a differential to single ended converter to convert the differential output signal into an output signal, and a programmable frequency divider to generate the feedback signal based on the output signal.
摘要翻译：用于低电压操作的低抖动和宽范围频率合成器包括：检测器，用于基于输入信号和反馈信号之间的逻辑电平差产生检测信号;电荷泵，用于基于检测信号产生控制信号; 基于所述控制信号产生调谐信号的滤波器，基于所述调谐信号产生第一偏置信号和第二偏置信号的偏置电路，基于所述第一和第二偏置产生差分输出信号的可控振荡器信号，差分到单端转换器将差分输出信号转换成输出信号，以及可编程分频器，以基于输出信号产生反馈信号。

9. 发明申请

US20100127788A1 SELECTABLE LOCAL OSCILLATOR 有权
标题翻译：可选择本地振荡器
公开(公告)号：US20100127788A1
公开(公告)日：2010-05-27
申请号：US12277530
申请日：2008-11-25
申请人： Tony Meng Yuen Chan
发明人： Tony Meng Yuen Chan
IPC分类号： H03J7/04
CPC分类号： H03B21/02
摘要： A selectable local oscillator provides an output frequency signal having a selectable frequency within a desired output frequency range. The selectable local oscillator comprises first, second and third signal generators configured to provide first, second and third frequency signals having frequencies in first, second and third input frequency ranges. A first mixer provides a first mixed product signal having an upper sideband and a lower sideband. A frequency selector selects one of the upper and lower sidebands of the first mixed product signal. A second mixer provides a second mixed product signal having an upper sideband and a lower sideband. An output stage selects at least one of the upper and lower sidebands of the second mixed product signal as the output frequency signal.
摘要翻译：可选择的本地振荡器在期望的输出频率范围内提供具有可选频率的输出频率信号。可选择本地振荡器包括被配置为提供在第一，第二和第三输入频率范围内具有频率的第一，第二和第三频率信号的第一，第二和第三信号发生器。第一混合器提供具有上边带和下边带的第一混合产品信号。频率选择器选择第一混合乘积信号的上边带和下边带之一。第二混合器提供具有上边带和下边带的第二混合产品信号。输出级选择第二混合乘积信号的上边带和下边带中的至少一个作为输出频率信号。

10. 发明授权

US06980775B2 Automatic frequency control (AFC) system and method using an adaptive threshold to improve accuracy of the direct current (DC) component calculation for a received signal 有权
标题翻译：使用自适应阈值的自动频率控制（AFC）系统和方法来提高接收信号的直流（DC）分量计算的精度
公开(公告)号：US06980775B2
公开(公告)日：2005-12-27
申请号：US10331218
申请日：2002-12-30
申请人： Scott Michael Alazraki , Amish Pravinbhai Shah , Jesus Francisco Corretjer
发明人： Scott Michael Alazraki , Amish Pravinbhai Shah , Jesus Francisco Corretjer
IPC分类号： H03J7/04 , H04B1/40
CPC分类号： H03J7/04
摘要： A radio device requires a tunable transceiver such that the transceiver can be accurately set to a desired frequency. When a signal with known frequency accuracy is being received, an offset detector can determine the frequency offset generated by the transceiver due to improper tuning. An automatic frequency control (AFC) system (100) is comprised of a tunable transceiver, an adaptive detector (102) for comparing an incoming sample from the tunable transceiver to an adaptive maximum deviation threshold for determining if a sample from the tunable transceiver should be used for the direct current (DC) component of the AFC, an offset detector (103) and an AFC control processor (105) for utilizing information from the offset detector to reduce the inaccuracy in frequency by tuning the transceiver towards the received signal frequency. The AFC control processor (105) utilizes one of more threshold levels for defining a maximum correction threshold (311) based upon the desired maximum offset correction.
摘要翻译：无线电设备需要可调谐收发器，使得收发器可以被精确地设置到期望的频率。当接收到具有已知频率精度的信号时，偏移检测器可以由于不正确的调谐而确定由收发器产生的频率偏移。自动频率控制（AFC）系统（100）包括可调谐收发器，自适应检测器（102），用于将来自可调谐收发机的输入采样与自适应最大偏差阈值进行比较，用于确定来自可调谐收发器的样本是否应为用于AFC的直流（DC）分量，偏移检测器（103）和AFC控制处理器（105），用于利用来自偏移检测器的信息，通过将收发器调谐到接收信号频率来减少频率的不精确度。 AFC控制处理器（105）利用多个阈值电平中的一个来基于所需的最大偏移校正来定义最大校正阈值（311）。

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