公开(公告)号：US20120207138A1

公开(公告)日：2012-08-16

申请号：US13444218

申请日：2012-04-11

申请人： Arthur Korn ,  Dacfey Dzung ,  Guntram Scheible ,  Harald Vefling ,  Anne Vallestad

发明人： Arthur Korn ,  Dacfey Dzung ,  Guntram Scheible ,  Harald Vefling ,  Anne Vallestad

IPC分类号： H04W56/00 ,  H04J3/00 ,  H04W72/04

CPC分类号： H02M7/53871

摘要： A method for controlling a plurality of power converters connected to a power supply network is described. Each power converter includes high-power semiconductor devices. Control signals are sent between a controller and a wireless node of one or more of said plurality of power converters using a wireless communication system. The control signals are transmitted to a local wireless node of one or more of a plurality of power converters. The data transmissions include data packets including control information such that a clock of the local wireless node can be synchronized using time synchronization information of the wireless communication system. In other aspects of the invention a system employing the method and a computer program for carrying out the method are described.

摘要翻译： 描述了一种用于控制连接到电源网络的多个电力转换器的方法。 每个功率转换器包括大功率半导体器件。 使用无线通信系统在控制器和所述多个功率转换器中的一个或多个的无线节点之间发送控制信号。 控制信号被发送到多个功率转换器中的一个或多个的本地无线节点。 数据传输包括包括控制信息的数据分组，使得可以使用无线通信系统的时间同步信息来同步本地无线节点的时钟。 在本发明的其他方面，描述了采用该方法的系统和用于执行该方法的计算机程序。

公开(公告)号：US07752430B2

公开(公告)日：2010-07-06

申请号：US10928135

申请日：2004-08-30

申请人： Dacfey Dzung

发明人： Dacfey Dzung

IPC分类号： H04L29/06

CPC分类号： H04K1/00 ,  H04L27/2602 ,  H04L27/2626 ,  H04L27/2647

摘要： The present invention is concerned with a method to encrypt OFDM modulation, by multiplying its underlying QAM symbols by a complex-valued generalized key stream sequence. Performing encryption on the physical layer ensures that all services and applications running over the OFDM modem will be protected against eavesdropping. It is also proposed to include in the encryption any training symbols used for synchronization and channel estimation. Only the legitimate receiver knowing the encryption key is hence able to synchronize and correctly demodulate the received signal. Attackers will not even be able to acquire the encrypted signal.

摘要翻译： 本发明涉及通过将其基础QAM符号乘以复值广义密钥流序列来加密OFDM调制的方法。 在物理层上执行加密可确保通过OFDM调制解调器运行的所有服务和应用程序都将受到保护，防止窃听。 还提出在加密中包括用于同步和信道估计的任何训练符号。 只有知道加密密钥的合法接收者能够同步并正确解调接收到的信号。 攻击者甚至不能获得加密信号。

公开(公告)号：US08582426B2

公开(公告)日：2013-11-12

申请号：US11798765

申请日：2007-05-16

申请人： Hubert Kirrmann ,  Dacfey Dzung

发明人： Hubert Kirrmann ,  Dacfey Dzung

IPC分类号： G01R31/08 ,  G06F11/00 ,  G08C15/00 ,  H04J1/16 ,  H04J3/14 ,  H04L1/00 ,  H04L12/26

CPC分类号： H04L1/22 ,  H04L12/40189 ,  H04L12/413 ,  H04L41/0659 ,  H04L69/40 ,  H04L2012/40273 ,  Y04S40/166

摘要： The present disclosure relates to highly available communication networks, e.g., for industrial or utility applications such as substation automation. The devices are connected to two redundant lines through two independent transceivers and bus controllers, i.e. the physical layer and the link layer of the corresponding protocol stack is duplicated. For seamless operation, a sender sends frames simultaneously over both lines and a receiver accepts whichever frame of a pair comes first and ignores the late frame. An exemplary method is disclosed for discarding duplicate frames at the link layer without considering the higher protocol layers, based on a counter inserted in the frame and an algorithm for rejection, with a corresponding means to detect which frames operate according to the redundancy protocol.

摘要翻译： 本公开涉及高可用性通信网络，例如用于诸如变电站自动化的工业或公用事业应用。 这些设备通过两个独立的收发器和总线控制器连接到两条冗余线路，即相应协议栈的物理层和链路层被复制。 为了无缝操作，发送方通过两条线同时发送帧，接收器接收一对帧中的哪一帧，并忽略后期帧。 公开了一种用于在链路层丢弃重复帧的示例性方法，而不考虑基于插入在帧中的计数器的更高协议层和用于拒绝的算法，具有根据冗余协议检测哪些帧操作的相应装置。

公开(公告)号：US20070260879A1

公开(公告)日：2007-11-08

申请号：US11822275

申请日：2007-07-03

申请人： Dacfey Dzung

发明人： Dacfey Dzung

IPC分类号： H04L9/00

CPC分类号： H04L63/065 ,  H04L12/1886 ,  H04L63/104 ,  H04L63/126

摘要： A method of message authentication in communication networks with multicast-enabled routers or switches is disclosed. The latter are tasked to support the packet source authentication: On reception of a multicast packet, the router attests the authenticity of the sender of the packet, and adds corresponding authentication information to the packet, before forwarding it in the normal multicast manner. Any receiver of the multicast packet then uses the authentication information collected by the packet while traversing the network to verify the original packet source.

摘要翻译： 公开了一种在具有组播功能的路由器或交换机的通信网络中进行消息认证的方法。 后者的任务是支持分组源认证：接收到组播报文后，路由器验证报文发送方的真实性，并在正常组播方式转发报文前，将相应的认证信息加入到报文中。 组播报文的任何接收者随后使用通过网络收集的认证信息，以验证原始报文源。

公开(公告)号：US4862481A

公开(公告)日：1989-08-29

申请号：US196494

申请日：1988-05-20

申请人： Dacfey Dzung

发明人： Dacfey Dzung

IPC分类号： H04L27/20 ,  H04L25/03 ,  H04L27/22

CPC分类号： H04L25/03178 ,  H04L2025/03407

摘要： During a signal transmission process, digital data are reproduced in a transmitter in accordance with a given process for the continuous phase modulation of a carrier wave (CPM) in a time-dependent envelope curve, the envelope curve is transmitted by the carrier wave via a channel with a given unit pulse response, an additive, white Gaussian noise being superimposed, the digital data are sent through a channel-specific filter and sampled in a receiver, and a sequence of estimated symbols is determined with an optimization algorithm.

摘要翻译： 在信号传输过程中，根据给定的时间依赖包络线中载波（CPM）的相位调制的处理，在发射机中再现数字数据，包络线由载波经由 具有给定单位脉冲响应的信道，叠加的加性白高斯噪声，数字数据通过通道特定滤波器发送并在接收机中采样，并且利用优化算法确定估计符号序列。

公开(公告)号：US20110251810A1

公开(公告)日：2011-10-13

申请号：US13152926

申请日：2011-06-03

申请人： Dacfey DZUNG ,  Mats LARSSON

发明人： Dacfey DZUNG ,  Mats LARSSON

IPC分类号： G06F19/00 ,  G01R25/00

CPC分类号： G01B7/02 ,  G01R31/021

摘要： A method and system are provided for determining a length quantity of a power transmission line, which connects a first location with a second location. A first signal having a first carrier frequency is provided at the first location. The first signal is transmitted from the first location to the second location via the power transmission line. A second signal having a second frequency is provided at the second location. A first phase difference between the first signal and the second signal is measured at the second location, and the length quantity is calculated from the measured phase difference. In the system, a second receiver at the second location is configured to receive the first signal having the first carrier frequency from the first location. A frequency generator creates the second signal having the second frequency at the second location. The receiver includes a phase detection device configured to detect a first phase difference between the second frequency and the first carrier frequency at the second location.

摘要翻译： 提供一种方法和系统，用于确定连接第一位置与第二位置的输电线的长度数量。 具有第一载波频率的第一信号被提供在第一位置。 第一信号经由电力传输线从第一位置发送到第二位置。 在第二位置提供具有第二频率的第二信号。 在第二位置处测量第一信号和第二信号之间的第一相位差，并根据测量的相位差计算长度量。 在系统中，在第二位置处的第二接收机被配置为从第一位置接收具有第一载波频率的第一信号。 频率发生器在第二位置产生具有第二频率的第二信号。 接收机包括相位检测装置，其被配置为在第二位置处检测第二频率与第一载波频率之间的第一相位差。

公开(公告)号：US07865331B2

公开(公告)日：2011-01-04

申请号：US12698641

申请日：2010-02-02

申请人： Dacfey Dzung ,  Mats Larsson

发明人： Dacfey Dzung ,  Mats Larsson

IPC分类号： G04G5/00 ,  H04B1/06

CPC分类号： H04J3/0682 ,  H02J13/0017 ,  H04J3/0644 ,  Y02E60/7807 ,  Y04S10/527 ,  Y04S40/12

摘要： Time synchronization of two clocks is disclosed herein, such as two stationary clocks. A global time signal from a global time reference or common time source can be used to calculate a common view based clock offset between the two clocks. In parallel, a network based clock offset between the two clocks can be calculated based on messages exchanged over a communication network interconnecting the two clocks, without reverting to the global time reference. Two recent values (e.g., the two most recent values) of the common view clock offset and the network based clock offset can be combined or superposed in a seamless way to produce a final time offset estimate. The combination of independently calculated common view and network based clock offsets can be a weighted average of the two values, involving respective weights based on quality estimates of the latter. The time synchronization schemes based on a Global Positioning System (GPS) and a wide area communication network can be combined to synchronize the stationary clocks of phasor measurement units (PMUs) of a wide area monitoring system to a central server clock at a Network Control Center (NCC) of the system.

摘要翻译： 这里公开了两个时钟的时间同步，诸如两个固定时钟。 来自全局时间参考或公共时间源的全局时间信号可用于计算两个时钟之间的基于公共视图的时钟偏移。 并行地，可以基于通过互连两个时钟的通信网络交换的消息来计算两个时钟之间的基于网络的时钟偏移，而不返回到全局时间参考。 公共视图时钟偏移和基于网络的时钟偏移的两个最近的值（例如，两个最近的值）可以以无缝方式组合或重叠以产生最终时间偏移估计。 独立计算的共同视图和基于网络的时钟偏移的组合可以是两个值的加权平均值，涉及基于后者的质量估计的相应权重。 可以组合基于全球定位系统（GPS）和广域通信网络的时间同步方案，以将广域监控系统的相量测量单元（PMU）的固定时钟与网络控制中心的中央服务器时钟同步 （NCC）的系统。

公开(公告)号：US4750192A

公开(公告)日：1988-06-07

申请号：US64571

申请日：1987-06-22

申请人： Dacfey Dzung

发明人： Dacfey Dzung

IPC分类号： H04L27/18 ,  H04L27/20 ,  H04L27/12

CPC分类号： H04L27/2028

摘要： A method for transmitting digital data by means of continuous phase modulation (CPM), wherein the transmission signal s(t) is generated by retrieving stored digital values, which are allocated to a continuous sequence of symbols a.sub.i present at the transmitter input, from storage in a memory. In contrast to the conventional method, these stored digital values are not calculated from a predetermined frequency-base-band pulse g(t) by linear superposition but are optimized with respect to the in-band power emitted by means of an iterative method. This non-linear method leads to distinctly improved spectral characteristics of the transmission signal s(t).

摘要翻译： 一种用于通过连续相位调制（CPM）发送数字数据的方法，其中通过从存储器中检索分配给存在于发射器输入端的连续符号序列a 1的存储的数字值来产生传输信号s（t） 在记忆中 与常规方法相比，这些存储的数字值不是通过线性叠加从预定的频率基带脉冲g（t）计算的，而是相对于通过迭代方法发射的带内功率被优化。 这种非线性方法导致传输信号s（t）的明显改善的频谱特性。

公开(公告)号：US20100138187A1

公开(公告)日：2010-06-03

申请号：US12698641

申请日：2010-02-02

申请人： Dacfey DZUNG ,  Mats Larsson

发明人： Dacfey DZUNG ,  Mats Larsson

IPC分类号： G04G7/02 ,  G04G99/00

CPC分类号： H04J3/0682 ,  H02J13/0017 ,  H04J3/0644 ,  Y02E60/7807 ,  Y04S10/527 ,  Y04S40/12

摘要： Time synchronization of two clocks is disclosed herein, such as two stationary clocks. A global time signal from a global time reference or common time source can be used to calculate a common view based clock offset between the two clocks. In parallel, a network based clock offset between the two clocks can be calculated based on messages exchanged over a communication network interconnecting the two clocks, without reverting to the global time reference. Two recent values (e.g., the two most recent values) of the common view clock offset and the network based clock offset can be combined or superposed in a seamless way to produce a final time offset estimate. The combination of independently calculated common view and network based clock offsets can be a weighted average of the two values, involving respective weights based on quality estimates of the latter. The time synchronization schemes based on a Global Positioning System (GPS) and a wide area communication network can be combined to synchronize the stationary clocks of phasor measurement units (PMUs) of a wide area monitoring system to a central server clock at a Network Control Center (NCC) of the system.

摘要翻译： 这里公开了两个时钟的时间同步，诸如两个固定时钟。 来自全局时间参考或公共时间源的全局时间信号可用于计算两个时钟之间的基于公共视图的时钟偏移。 并行地，可以基于通过互连两个时钟的通信网络交换的消息来计算两个时钟之间的基于网络的时钟偏移，而不返回到全局时间参考。 公共视图时钟偏移和基于网络的时钟偏移的两个最近的值（例如，两个最近的值）可以以无缝方式组合或重叠以产生最终时间偏移估计。 独立计算的共同视图和基于网络的时钟偏移的组合可以是两个值的加权平均值，涉及基于后者的质量估计的相应权重。 可以组合基于全球定位系统（GPS）和广域通信网络的时间同步方案，以将广域监控系统的相量测量单元（PMU）的固定时钟与网络控制中心的中央服务器时钟同步 （NCC）的系统。

公开(公告)号：US20090191494A1

公开(公告)日：2009-07-30

申请号：US12403118

申请日：2009-03-12

申请人： Lorenzo Galfrascoli ,  Dacfey Dzung ,  Matteo Venturino ,  Olivier Steiger

发明人： Lorenzo Galfrascoli ,  Dacfey Dzung ,  Matteo Venturino ,  Olivier Steiger

IPC分类号： F23D14/46

CPC分类号： F23N5/082 ,  F23N5/08 ,  F23N2029/06 ,  F23N2029/18 ,  F23N2029/20 ,  F23N2900/05005

摘要： A flame detector is disclosed for monitoring a flame during a combustion process, comprising a camera and a carrier tube, wherein the camera is arranged at a front end of the carrier tube such that an optical access of the camera is directed toward the flame when the front end of the carrier tube is mounted in the vicinity of a burner nozzle aperture.

摘要翻译： 公开了一种用于在燃烧过程中监测火焰的火焰检测器，包括照相机和载体管，其中相机布置在承载管的前端，使得当照相机的光学接近指向火焰时 载体管的前端安装在燃烧器喷嘴孔附近。