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1. 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.

2. 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.

3. 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。

4. 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.

5. 发明申请

US20050229068A1 Tracking a code modulated signal 失效
标题翻译：跟踪码调制信号
公开(公告)号：US20050229068A1
公开(公告)日：2005-10-13
申请号：US10735285
申请日：2003-12-12
申请人： David Akopian , Harri Valio
发明人： David Akopian , Harri Valio
IPC分类号： G06F17/15 , H04L1/00 , G06F11/00 , G06F11/30 , G08C25/00 , H03M13/00
CPC分类号： H04B1/7085 , G06F17/15 , H04B2201/70707
摘要： To reduce the complexity of the correlation in a correlation based tracking of a code modulated signal received at a receiver, received samples and available replica samples are aligned to each other and the positions of the samples in the received signal and in the replica code sequences are grouped, each group comprising all positions at which the composition of the values of the samples of all of the replica code sequences is similar. The values of the received samples which are associated to a respective group are combined separately for each group to obtain a respective intermediate result. Then, a correlation value is determined for each replica code sequence by combining the intermediate results obtained for all groups separately for each replica code sequence, taking into account the values of the samples of the replica sequences in the respective group.
摘要翻译：为了减少在接收机处接收的码调制信号的基于相关的跟踪中的相关性的复杂性，接收的样本和可用的副本样本彼此对准，并且接收信号和副本码序列中的样本的位置是分组，每个组包括所有复制代码序列的样本的值的组成相似的所有位置。将与各组相关联的接收样本的值分别组合为每组，以获得各自的中间结果。然后，考虑到各组中的副本序列的样本的值，通过组合针对每个复制码序列分别获得的针对所有组的中间结果，确定每个复制码序列的相关值。

6. 发明授权

US06909738B2 Method in a receiver and a receiver 有权
标题翻译：接收机和接收机中的方法
公开(公告)号：US06909738B2
公开(公告)日：2005-06-21
申请号：US09826260
申请日：2001-04-04
申请人： David Akopian , Ilkka Kontola , Harri Valio , Seppo Turunen
发明人： David Akopian , Ilkka Kontola , Harri Valio , Seppo Turunen
IPC分类号： H04B1/707 , H04L27/00 , H04L27/227 , H04L27/30
CPC分类号： G01S19/29 , H04B1/7075 , H04B2201/70715 , H04L27/2272 , H04L2027/0057 , H04L2027/0065
摘要： The invention relates to a method for acquiring a receiver (1) into a code modulated spread spectrum signal received by the receiver (1). In the method at least one replica code (r) is used which corresponds to a code used with the modulation having a pre-determined number of chips, and an examination phase is performed, in which a frequency shift of the signal within a selected frequency area is examined, and a code phase of the code used with the modulation is examined. In the method the frequency shift examination is divided into a first estimation phase and a second estimation phase, wherein in the first estimation phase the selected frequency area is divided into a first set of frequencies, and in the second estimation phase a second set of frequencies is examined nearby each frequency of the first set of frequencies. Further, a comparison for frequencies of the second set of frequencies is performed using the received signal and the replica code (r), and the results of the comparison are used to estimate the correct frequency shift.
摘要翻译：本发明涉及一种用于将接收机（1）采集到由接收机（1）接收的码调制扩频信号中的方法。在该方法中，使用至少一个复制码（r），其对应于具有预定数量的码片的调制使用的码，并且执行检查相位，其中在所选频率内的信号的频移检查区域，并且检查与调制一起使用的代码的代码相位。在该方法中，频移检查被分为第一估计阶段和第二估计阶段，其中在第一估计阶段中，将所选择的频率区域划分为第一组频率，在第二估计阶段中，将第二组频率在第一组频率的每个频率附近检查。此外，使用接收信号和复制码（r）进行第二组频率的频率比较，并且比较结果用于估计正确的频移。

7. 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。

8. 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。

9. 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。

10. 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。

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