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11. 发明授权

US07064708B2 Validation of beacon signals 失效
标题翻译：信标信号的验证
公开(公告)号：US07064708B2
公开(公告)日：2006-06-20
申请号：US10693332
申请日：2003-10-24
申请人： David Akopian , Harri Valio , Samuli Pietila , Jari Syrjarinne
发明人： David Akopian , Harri Valio , Samuli Pietila , Jari Syrjarinne
IPC分类号： G01S5/02 , H04B7/185
CPC分类号： G01S5/0221 , G01S19/20
摘要： A method for validating detected code modulated signals transmitted by beacons of a positioning system and received by a receiver comprises as a first step performing measurements for the detected beacon signals. Then, at least one of the detected beacon signals is selected as a calibration signal. In a next step, at least one allowed range for results of measurements for detected beacon signals other than the calibration signal are determined based on measurements for the detected calibration signal and on an available reference position of the receiver. Finally, each detection of a beacon signal for which results of performed measurements are outside of an allowed range is rejected. The invention relates equally to a corresponding receiver, to an electronic device comprising such a receiver, to a device cooperating with such a receiver and to a corresponding positioning system.
摘要翻译：用于验证由定位系统的信标发送并由接收机接收的检测到的码调制信号的方法包括作为对检测到的信标信号进行测量的第一步骤。然后，选择检测到的信标信号中的至少一个作为校准信号。在下一步骤中，基于检测到的校准信号的测量和接收机的可用参考位置来确定除了校准信号之外的检测到的信标信号的测量结果的至少一个允许范围。最后，拒绝对所执行的测量结果超出允许范围的信标信号的每次检测。本发明同样涉及对应的接收机，包括这种接收机的电子设备，与这种接收机配合的设备和相应的定位系统。

12. 发明授权

US09741256B2 Remote laboratory gateway 有权
公开(公告)号：US09741256B2
公开(公告)日：2017-08-22
申请号：US13291065
申请日：2011-11-07
申请人： David Akopian , Arsen Melkonyan , Murillo Pontual , Grant Huang , Andreas Robert Gampe
发明人： David Akopian , Arsen Melkonyan , Murillo Pontual , Grant Huang , Andreas Robert Gampe
IPC分类号： G09B5/00 , G06Q50/00
CPC分类号： G09B5/00 , G06F19/00 , G06Q50/00 , G09G2358/00 , G09G2370/02
摘要： A remote laboratory gateway enables a plurality of students to access and control a laboratory experiment remotely. Access is provided by an experimentation gateway, which is configured to provide secure access to the experiment via a network-centric, web-enabled interface graphical user interface. Experimental hardware is directly controlled by an experiment controller, which is communicatively coupled to the experimentation gateway and which may be a software application, a standalone computing device, or a virtual machine hosted on the experimentation gateway. The remote laboratory of the present specification may be configured for a software-as-a-service business model.

13. 发明授权

US07120191B2 Method and apparatus for acquiring a ranging signal of a positioning system 失效
公开(公告)号：US07120191B2
公开(公告)日：2006-10-10
申请号：US10016499
申请日：2001-12-12
申请人： David Akopian
发明人： David Akopian
IPC分类号： H04B1/69 , H04B1/707 , H04B1/713
CPC分类号： G01S19/29 , G01S19/37 , H04L2027/0065
摘要： A method and corresponding apparatus for accurately determining the offset of the carrier frequency of a received signal from a nominal frequency (the offset due to for example Doppler shifting), such as is done in a ranging receiver when acquiring or tracking a signal transmitted by a beacon (such as a satellite) of a positioning system. The method amplifies a conventional correlation by performing a special noncoherent integration of the real and imaginary components of the output of a conventional (coherent) correlation calculation, resulting in a complex phasor having a phase that bears information about the offset of the carrier frequency from the nominal carrier frequency.

14. 发明授权

US10470161B2 Method and system for measurement and characterization of channel delays for broadband power line communications 有权
公开(公告)号：US10470161B2
公开(公告)日：2019-11-05
申请号：US15548870
申请日：2016-02-05
申请人： David Akopian , Grant Huang , C. L. Philip Chen
发明人： David Akopian , Grant Huang , C. L. Philip Chen
IPC分类号： H04W72/00 , H04L1/16 , H04L1/24 , H04L5/14 , H04W52/22 , H04L12/24 , G06F11/34 , G06F17/18 , H04W84/04
摘要： Disclosed are various embodiments for a system and method of measuring and characterizing a PLC communication network comprising transmitting a plurality of packets from a PLC master device to a PLC terminal device via a PLC communication network, measuring a plurality of round-trip time (RTT) timestamps for the plurality of packets in the PLC master device, determining an observed probability density function based on the plurality of RTT timestamps, approximating a plurality of probability density functions, determining a rating for the probability density functions based on a comparison of the probability density functions to the observed probability density function, characterizing the PLC communication network based on the ratings of the plurality of probability density functions, and scheduling subsequent transmissions based on the characterization of the PLC Communication network.

15. 发明授权

US08548106B2 Crosscorrelation interference mitigating position estimation systems and methods therefor 有权
标题翻译：互相关干扰减轻位置估计系统及其方法
公开(公告)号：US08548106B2
公开(公告)日：2013-10-01
申请号：US12565434
申请日：2009-09-23
申请人： Catalin Lacatus , David Akopian , Mehdi Shadaram
发明人： Catalin Lacatus , David Akopian , Mehdi Shadaram
IPC分类号： H04L25/08 , H04B1/00
CPC分类号： G01S19/21 , H04B1/7097 , H04B2201/70715 , H04B2201/709709
摘要： Provided is a method that includes dynamically adjusting a GPS signature code to minimize the interference (e.g., the cross-correlation interference) experienced due to one or more other GPS signals. Further provided is a method that includes adjusting the complexity of an adaptive solution to reduce the time and processing power associated with tracking a GPS signal.
摘要翻译：提供了一种方法，其包括动态地调整GPS签名代码以最小化由于一个或多个其它GPS信号而遭受的干扰（例如，互相关干扰）。还提供了一种方法，其包括调整自适应解决方案的复杂性以减少跟踪GPS信号所需的时间和处理能力。

16. 发明申请

US20130117019A1 Remote Laboratory Gateway 有权
标题翻译：远程实验室网关
公开(公告)号：US20130117019A1
公开(公告)日：2013-05-09
申请号：US13291065
申请日：2011-11-07
申请人： David Akopian , Arsen Melkonyan , Murillo Pontual , Grant Huang , Andreas Robert Gampe
发明人： David Akopian , Arsen Melkonyan , Murillo Pontual , Grant Huang , Andreas Robert Gampe
IPC分类号： H04L12/56 , G10L13/00 , G10L15/26 , G06F15/16
CPC分类号： G09B5/00 , G06F19/00 , G06Q50/00 , G09G2358/00 , G09G2370/02
摘要： A remote laboratory gateway enables a plurality of students to access and control a laboratory experiment remotely. Access is provided by an experimentation gateway, which is configured to provide secure access to the experiment via a network-centric, web-enabled interface graphical user interface. Experimental hardware is directly controlled by an experiment controller, which is communicatively coupled to the experimentation gateway and which may be a software application, a standalone computing device, or a virtual machine hosted on the experimentation gateway. The remote laboratory of the present specification may be configured for a software-as-a-service business model.
摘要翻译：远程实验室门户使多个学生能够远程访问和控制实验室实验。访问由实验网关提供，实验网关被配置为通过网络为中心的启用Web的界面图形用户界面提供对实验的安全访问。实验硬件由实验控制器直接控制，实验控制器通信耦合到实验网关，可以是软件应用程序，独立计算设备或实验网关上托管的虚拟机。本规范的远程实验室可以配置为软件即服务业务模型。

17. 发明申请

US20080130883A1 Methods and Systems for Digital Image Security 有权
标题翻译：数字图像安全的方法和系统
公开(公告)号：US20080130883A1
公开(公告)日：2008-06-05
申请号：US11740742
申请日：2007-04-26
申请人： Sos S. Agaian , David Akopian , Ravindranath C. Cherukuri , Juan Pablo Perez , Benjamin M. Rodriguez , Ronnie R. Sifuentes
发明人： Sos S. Agaian , David Akopian , Ravindranath C. Cherukuri , Juan Pablo Perez , Benjamin M. Rodriguez , Ronnie R. Sifuentes
IPC分类号： G09C5/00 , G06K9/00
CPC分类号： G09C5/00 , G06T1/0028 , G06T1/0078 , G06T2201/0051 , G06T2201/0202
摘要： Methods and systems for securing digital imagery are provided. In one respect, embedding, compression, encryption, data hiding, and other imaging processing techniques and systems may be provided for digital image security. In one non-limiting example, a method for producing a compressed and encrypted image is provided. An image may be converted into a binary bit stream, and the bit stream may be decomposed into a plurality of segments. A binary sequence based on a first key may be generated and may be used to generate a code matrix. A distance between the code matrix and the distance may be determined for each of the plurality of segments. Using a combined first and second key, a compressed and encrypted image may be obtained.
摘要翻译：提供了保护数字图像的方法和系统。在一方面，可以提供嵌入，压缩，加密，数据隐藏和其他成像处理技术和系统以用于数字图像安全。在一个非限制性示例中，提供了一种用于产生压缩和加密图像的方法。图像可以被转换为二进制比特流，并且比特流可以被分解成多个片段。可以生成基于第一密钥的二进制序列并且可以用于生成代码矩阵。可以针对多个段中的每一个确定码矩阵和距离之间的距离。使用组合的第一和第二密钥，可以获得压缩和加密的图像。

18. 发明授权

US06833813B2 Method, receiver and system for determining the time of reception of a beacon signal 有权
标题翻译：用于确定信标信号的接收时间的方法，接收机和系统
公开(公告)号：US06833813B2
公开(公告)日：2004-12-21
申请号：US10403801
申请日：2003-03-28
申请人： David Akopian , Jari Syrjärinne
发明人： David Akopian , Jari Syrjärinne
IPC分类号： G01S100
CPC分类号： G01S19/24 , G01S19/23 , G01S19/256 , G01S19/258 , G01S19/27
摘要： The invention relates to a method and to devices for determining in a positioning system the time of reception of a beacon signal which was received and tracked by a receiver. In order to enable a re-acquisition of the system time based on a noisy received signal, it is proposed that the method comprises as a first step reconstructing a beacon signal for an interval based on available information. Then, a cross-correlation is performed between the reconstructed signal and the received signal at different relative positions to each other. Next, the time of transmission of the received signal is determined based on information for the reconstructed signal and on the relative position resulting in the maximum correlation value. Finally, a time of reception of said received signal is determined as the sum of the determined time of transmission of the received signal and of a calculated time of flight of the received signal.
摘要翻译：本发明涉及一种用于在定位系统中确定由接收机接收和跟踪的信标信号的接收时间的装置。为了能够基于噪声接收信号重新获取系统时间，提出了该方法包括作为基于可用信息的间隔重建信标信号的第一步骤。然后，在不同相对位置处的重构信号和接收信号之间进行互相关。接下来，基于重构信号的信息和导致最大相关值的相对位置来确定接收信号的发送时间。最后，所接收的信号的接收时间被确定为所确定的接收信号的传输时间与所计算的接收信号的飞行时间的和的总和。

19. 发明授权

US06810072B1 System for acquiring spread spectrum signals 失效
标题翻译：用于采集扩频信号的系统
公开(公告)号：US06810072B1
公开(公告)日：2004-10-26
申请号：US09580155
申请日：2000-05-30
申请人： David Akopian
发明人： David Akopian
IPC分类号： H04B169
CPC分类号： H04B1/708 , G01S19/29 , G01S19/30 , H04B1/70775 , H04B1/7087 , H04B1/7093 , H04B2201/70715 , H04L2027/0028 , H04L2027/0057
摘要： An apparatus, system, and corresponding method for acquiring a spread spectrum signal, where the acquiring includes matching the phase of a replica of a code component to the phase of the received code component and also determining the carrier frequency including any Doppler or other shifting, the apparatus including: a multi-section matched filter for providing successive section outputs each including elements corresponding to a different replica code phase; and a compensated acquisition module, responsive to each section output of each of the sections, for providing a sequence of frequency indicators, each corresponding to a different frequency offset, with each section output having elements each of which corresponds to a particular value of replica code phase, wherein each frequency indicator is based on a combining, phase element-wise, of the section outputs using compensating factors that depend on the corresponding frequency offset.
摘要翻译：一种用于获取扩频信号的装置，系统和相应方法，其中所述获取包括将代码分量的副本的相位与所接收的代码分量的相位进行匹配，并且还确定包括任何多普勒或其它移位的载波频率，所述装置包括：多段匹配滤波器，用于提供每个包括对应于不同复制码相位的元素的连续部分输出; 以及补偿获取模块，响应于每个部分的每个部分输出，用于提供频率指示符序列，每个频率指示符对应于不同的频率偏移，每个部分输出具有各自对应于复制代码的特定值的元素相位，其中每个频率指示器基于使用依赖于相应频率偏移的补偿因子的部分输出的组合，相位成分。

20. 发明授权

US06573799B1 Clock system and corresponding method for providing a clock time accounting for systematic error 失效
标题翻译：时钟系统和相应的方法提供时钟计时系统误差
公开(公告)号：US06573799B1
公开(公告)日：2003-06-03
申请号：US10016655
申请日：2001-12-12
申请人： David Akopian
发明人： David Akopian
IPC分类号： H03B100
CPC分类号： G01S19/40 , G01S19/09
摘要： Method for accounting for factors (such as temperature) causing systematic errors (time-varying or constant) in a clock, such as a clock used in a ranging receiver (for use with a positioning system such as the Global Positioning System), and a corresponding clock system (including a clock and a filter such as a Kalman filter) for providing clock time and error, used for example in a ranging receiver. The invention adds new state vector components to account for systematic error. The process update equation used in the navigation solution is accordingly extended to include the additional components of the state vector.
摘要翻译：用于考虑在时钟中引起系统误差（时变或恒定）的因素（如温度）的方法，例如测距接收机中使用的时钟（用于与诸如全球定位系统的定位系统一起使用），以及相应的时钟系统（包括时钟和滤波器，例如卡尔曼滤波器），用于提供时钟时间和误差，例如用于测距接收机。本发明增加了新的状态向量分量来解决系统误差。因此，导航解中使用的过程更新方程被扩展为包括状态向量的附加组件。

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