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1. 发明授权

US07277644B2 Fade-resistant forward error correction method for free-space optical communications systems 失效
标题翻译：自由空间光通信系统的防褪色前向纠错方法
公开(公告)号：US07277644B2
公开(公告)日：2007-10-02
申请号：US10676450
申请日：2003-09-30
申请人： Gary W. Johnson , Farid U. Dowla , Anthony J. Ruggiero
发明人： Gary W. Johnson , Farid U. Dowla , Anthony J. Ruggiero
IPC分类号： H04B10/00
CPC分类号： H04B10/1121 , H03M13/1515 , H03M13/47 , H03M13/6306 , H04J14/02 , H04L1/0041 , H04L1/0045
摘要： Free-space optical (FSO) laser communication systems offer exceptionally wide-bandwidth, secure connections between platforms that cannot other wise be connected via physical means such as optical fiber or cable. However, FSO links are subject to strong channel fading due to atmospheric turbulence and beam pointing errors, limiting practical performance and reliability. We have developed a fade-tolerant architecture based on forward error correcting codes (FECs) combined with delayed, redundant, sub-channels. This redundancy is made feasible though dense wavelength division multiplexing (WDM) and/or high-order M-ary modulation. Experiments and simulations show that error-free communications is feasible even when faced with fades that are tens of milliseconds long. We describe plans for practical implementation of a complete system operating at 2.5 Gbps.
摘要翻译：自由空间光学（FSO）激光通信系统在平台之间提供了非常宽的带宽，安全连接，无法通过诸如光纤或电缆的物理手段连接。然而，FSO链路由于大气湍流和波束指向误差而受到强烈的信道衰落，限制了实际的性能和可靠性。我们已经开发出一种基于前向纠错码（FEC）与延迟冗余子信道相结合的可逆容忍架构。通过密集波分复用（WDM）和/或高阶M进制调制，这种冗余是可行的。实验和仿真表明，即使面对几十毫秒的衰落，无差错通信也是可行的。我们描述了实际运行2.5 Gbps系统的完整系统的计划。

2. 发明授权

US07962150B2 Ultra-wideband radios for time-of-flight-ranging and network position estimation 有权
标题翻译：用于飞行时间范围和网络位置估计的超宽带无线电
公开(公告)号：US07962150B2
公开(公告)日：2011-06-14
申请号：US11637388
申请日：2006-12-11
申请人： Claudia A. Hertzog , Farid U. Dowla , Gregory E. Dallum , Carlos E. Romero
发明人： Claudia A. Hertzog , Farid U. Dowla , Gregory E. Dallum , Carlos E. Romero
IPC分类号： H04Q7/20
CPC分类号： G01S5/0221 , G01S13/878
摘要： This invention provides a novel high-accuracy indoor ranging device that uses ultra-wideband (UWB) RF pulsing with low-power and low-cost electronics. A unique of the present invention is that it exploits multiple measurements in time and space for very accurate ranging. The wideband radio signals utilized herein are particularly suited to ranging in harsh RF environments because they allow signal reconstruction in spite of multipath propagation distortion. Furthermore, the ranging and positioning techniques discussed herein directly address many of the known technical challenges encountered in UWB localization regarding synchronization and sampling. In the method developed, noisy, corrupted signals can be recovered by repeating range measurements across a channel, and the distance measurements are combined from many locations surrounding the target in a way that minimizes the range biases associated to indirect flight paths and through-wall propagation delays.
摘要翻译：本发明提供了一种新颖的高精度室内测距装置，其使用具有低功率和低成本电子器件的超宽带（UWB）RF脉冲。本发明的独特之处在于其在时间和空间上利用多次测量以进行非常精确的测距。本文使用的宽带无线电信号特别适合于在恶劣的RF环境中进行测距，因为尽管存在多径传播失真，但是它们允许信号重构。此外，本文讨论的测距和定位技术直接涉及UWB定位中遇到的关于同步和采样的许多已知技术挑战。在开发的方法中，可以通过在通道上重复距离测量来恢复噪声，损坏的信号，并且距离测量结合来自目标周围的许多位置，以使与间接飞行路径和通过壁传播相关联的范围偏差最小化延误

3. 发明授权

US08188841B2 Method of remote powering and detecting multiple UWB passive tags in an RFID system 有权
标题翻译：远程供电和检测RFID系统中的多个UWB无源标签的方法
公开(公告)号：US08188841B2
公开(公告)日：2012-05-29
申请号：US11897773
申请日：2007-08-31
申请人： Farid U. Dowla , Faranak Nekoogar , David M. Benzel , Gregory E. Dallum , Alex Spiridon
发明人： Farid U. Dowla , Faranak Nekoogar , David M. Benzel , Gregory E. Dallum , Alex Spiridon
IPC分类号： H04Q5/22
CPC分类号： G06K19/0701 , G06K7/0008 , G06K7/10079 , G06K7/10306 , H04B1/71635
摘要： A new Radio Frequency Identification (RFID), tracking, powering apparatus/system and method using coded Ultra-wideband (UWB) signaling is introduced. The proposed hardware and techniques disclosed herein utilize a plurality of passive UWB transponders in a field of an RFID-radar system. The radar system itself enables multiple passive tags to be remotely powered (activated) at about the same time frame via predetermined frequency UWB pulsed formats. Once such tags are in an activated state, an UWB radar transmits specific “interrogating codes” to put predetermined tags in an awakened status. Such predetermined tags can then communicate by a unique “response code” so as to be detected by an UWB system using radar methods.
摘要翻译：引入了使用编码超宽带（UWB）信令的新的射频识别（RFID），跟踪，供电设备/系统和方法。本文公开的所提出的硬件和技术在RFID-雷达系统的领域中使用多个被动UWB转发器。雷达系统本身使得能够通过预定的UWB脉冲格式在大约相同的时间帧远程供电（激活）多个无源标签。一旦这样的标签处于激活状态，UWB雷达发送特定的“询问码”，将预定的标签置于唤醒状态。这样的预定标签然后可以通过唯一的“响应码”进行通信，以便由使用雷达方法的UWB系统检测。

4. 发明申请

US20100225541A1 Ultra-wideband radios for time-of-flight-ranging and network position estimation 有权
标题翻译：用于飞行时间范围和网络位置估计的超宽带无线电
公开(公告)号：US20100225541A1
公开(公告)日：2010-09-09
申请号：US11637388
申请日：2006-12-11
申请人： Claudia A. Hertzog , Farid U. Dowla , Gregory E. Dallum , Carlos E. Romero
发明人： Claudia A. Hertzog , Farid U. Dowla , Gregory E. Dallum , Carlos E. Romero
IPC分类号： G01S1/24
CPC分类号： G01S5/0221 , G01S13/878
摘要： This invention provides a novel high-accuracy indoor ranging device that uses ultra-wideband (UWB) RF pulsing with low-power and low-cost electronics. A unique of the present invention is that it exploits multiple measurements in time and space for very accurate ranging. The wideband radio signals utilized herein are particularly suited to ranging in harsh RF environments because they allow signal reconstruction in spite of multipath propagation distortion. Furthermore, the ranging and positioning techniques discussed herein directly address many of the known technical challenges encountered in UWB localization regarding synchronization and sampling. In the method developed, noisy, corrupted signals can be recovered by repeating range measurements across a channel, and the distance measurements are combined from many locations surrounding the target in a way that minimizes the range biases associated to indirect flight paths and through-wall propagation delays.
摘要翻译：本发明提供了一种新颖的高精度室内测距装置，其使用具有低功率和低成本电子器件的超宽带（UWB）RF脉冲。本发明的独特之处在于其在时间和空间上利用多次测量以进行非常精确的测距。本文使用的宽带无线电信号特别适合于在恶劣的RF环境中进行测距，因为尽管存在多径传播失真，但是它们允许信号重构。此外，本文讨论的测距和定位技术直接涉及UWB定位中遇到的关于同步和采样的许多已知技术挑战。在开发的方法中，可以通过在通道上重复距离测量来恢复噪声，损坏的信号，并且距离测量结合来自目标周围的许多位置，以使与间接飞行路径和通过壁传播相关联的范围偏差最小化延误

5. 发明授权

US5373486A Seismic event classification system 失效
标题翻译：地震事件分类系统
公开(公告)号：US5373486A
公开(公告)日：1994-12-13
申请号：US13268
申请日：1993-02-03
申请人： Farid U. Dowla , Stephen P. Jarpe , William Maurer
发明人： Farid U. Dowla , Stephen P. Jarpe , William Maurer
IPC分类号： G01V1/00 , G06F17/00 , H04B1/06
CPC分类号： G01V1/003
摘要： In the computer interpretation of seismic data, the critical first step is to identify the general class of an unknown event. For example, the classification might be: teleseismic, regional, local, vehicular, or noise. Self-organizing neural networks (SONNs) can be used for classifying such events. Both Kohonen and Adaptive Resonance Theory (ART) SONNs are useful for this purpose. Given the detection of a seismic event and the corresponding signal, computation is made of: the time-frequency distribution, its binary representation, and finally a shift-invariant representation, which is the magnitude of the two-dimensional Fourier transform (2-D FFT) of the binary time-frequency distribution. This pre-processed input is fed into the SONNs. These neural networks are able to group events that look similar. The ART SONN has an advantage in classifying the event because the types of cluster groups do not need to be pre-defined. The results from the SONNs together with an expert seismologist's classification are then used to derive event classification probabilities.
摘要翻译：在计算机解析地震资料时，关键的第一步是确定一个未知事件的一般类。例如，分类可能是：远地震，区域，地方，车辆或噪音。自组织神经网络（SONN）可用于对这些事件进行分类。 Kohonen和自适应共振理论（ART）SONNs都是有用的。给定地震事件的检测和相应的信号，计算时间频率分布，二进制表示，最后是移位不变表示，它是二维傅立叶变换（2-D FFT）二进制时频分布。该预处理的输入被馈送到SONN中。这些神经网络能够组合看起来相似的事件。 ART SONN在分类事件方面具有优势，因为不需要预先定义集群组的类型。然后将SONN的结果与专家地震学家的分类结果一起用于导出事件分类概率。

6. 发明申请

US20100309951A1 TRANSMIT-REFERENCE METHODS IN SOFTWARE DEFINED RADIO PLATFORMS FOR COMMUNICATION IN HARSH PROPAGATION ENVIRONMENTS AND SYSTEMS THEREOF 有权
标题翻译：软件中的发送参考方法定义了用于通信的无线电平台，其传播环境及其系统
公开(公告)号：US20100309951A1
公开(公告)日：2010-12-09
申请号：US12795571
申请日：2010-06-07
申请人： Farid U. Dowla , Faranak Nekoogar
发明人： Farid U. Dowla , Faranak Nekoogar
IPC分类号： H04K3/00 , H04B1/69
CPC分类号： H04K3/42 , H03K3/00 , H04B1/0003 , H04K3/44 , H04K3/45 , H04K2203/00 , H04W4/90
摘要： A method for adaptive Radio Frequency (RF) jamming according to one embodiment includes dynamically monitoring a RF spectrum; detecting any undesired signals in real time from the RF spectrum; and sending a directional countermeasure signal to jam the undesired signals. A method for adaptive Radio Frequency (RF) communications according to another embodiment includes transmitting a data pulse in a RF spectrum; and transmitting a reference pulse separated by a predetermined period of time from the data pulse; wherein the data pulse is modulated with data, wherein the reference pulse is unmodulated. A method for adaptive Radio Frequency (RF) communications according to yet another embodiment includes receiving a data pulse in a RF spectrum; and receiving a reference pulse separated in time from the data pulse, wherein the data pulse is modulated with data, wherein the reference pulse is unmodulated; and demodulating the pulses.
摘要翻译：根据一个实施例的自适应射频（RF）干扰的方法包括动态监测RF频谱; 从RF频谱中实时检测任何不需要的信号; 并发送方向性对策信号以阻塞不需要的信号。根据另一实施例的用于自适应射频（RF）通信的方法包括在RF频谱中发送数据脉冲; 以及从所述数据脉冲发送与预定时间间隔分开的参考脉冲; 其中数据脉冲被数据调制，其中参考脉冲是未调制的。根据又一实施例的用于自适应射频（RF）通信的方法包括在RF频谱中接收数据脉冲; 以及从所述数据脉冲接收在时间上分离的参考脉冲，其中所述数据脉冲用数据调制，其中所述参考脉冲未被调制; 并解调脉冲。

7. 发明申请

US20090074119A1 MULTI-PULSE FREQUENCY SHIFTED (MPFS) MULTIPLE ACCESS MODULATION FOR ULTRA WIDEBAND 有权
标题翻译：用于超宽带的多脉冲频率（MPFS）多路访问调制
公开(公告)号：US20090074119A1
公开(公告)日：2009-03-19
申请号：US12210827
申请日：2008-09-15
申请人： Faranak Nekoogar , Farid U. Dowla
发明人： Faranak Nekoogar , Farid U. Dowla
IPC分类号： H04B1/00
CPC分类号： H04B1/719 , H04B1/71632 , H04B1/7172
摘要： The multi-pulse frequency shifted technique uses mutually orthogonal short duration pulses o transmit and receive information in a UWB multiuser communication system. The multiuser system uses the same pulse shape with different frequencies for the reference and data for each user. Different users have a different pulse shape (mutually orthogonal to each other) and different transmit and reference frequencies. At the receiver, the reference pulse is frequency shifted to match the data pulse and a correlation scheme followed by a hard decision block detects the data.
摘要翻译：多脉冲频移技术在UWB多用户通信系统中使用相互正交的短持续时间脉冲o发送和接收信息。多用户系统对于每个用户使用具有不同频率的相同脉冲形状用于参考和数据。不同的用户具有不同的脉冲形状（彼此相互正交）和不同的发射和参考频率。在接收机处，参考脉冲被频移以匹配数据脉冲，相关方案后跟硬判决块检测数据。

8. 发明授权

US08971441B2 Transmit-reference methods in software defined radio platforms for communication in harsh propagation environments and systems thereof 有权
标题翻译：用于在恶劣传播环境中进行通信的软件定义无线电平台中的发射参考方法及其系统
公开(公告)号：US08971441B2
公开(公告)日：2015-03-03
申请号：US12795571
申请日：2010-06-07
申请人： Farid U. Dowla , Faranak Nekoogar
发明人： Farid U. Dowla , Faranak Nekoogar
IPC分类号： H04B15/00 , H04K3/00
CPC分类号： H04K3/42 , H03K3/00 , H04B1/0003 , H04K3/44 , H04K3/45 , H04K2203/00 , H04W4/90
摘要： A method for adaptive Radio Frequency (RF) jamming according to one embodiment includes dynamically monitoring a RF spectrum; detecting any undesired signals in real time from the RF spectrum; and sending a directional countermeasure signal to jam the undesired signals. A method for adaptive Radio Frequency (RF) communications according to another embodiment includes transmitting a data pulse in a RF spectrum; and transmitting a reference pulse separated by a predetermined period of time from the data pulse; wherein the data pulse is modulated with data, wherein the reference pulse is unmodulated. A method for adaptive Radio Frequency (RF) communications according to yet another embodiment includes receiving a data pulse in a RF spectrum; and receiving a reference pulse separated in time from the data pulse, wherein the data pulse is modulated with data, wherein the reference pulse is unmodulated; and demodulating the pulses.
摘要翻译：根据一个实施例的自适应射频（RF）干扰的方法包括动态监测RF频谱; 从RF频谱中实时检测任何不需要的信号; 并发送方向性对策信号以阻塞不需要的信号。根据另一实施例的用于自适应射频（RF）通信的方法包括在RF频谱中发送数据脉冲; 以及从所述数据脉冲发送与预定时间间隔分开的参考脉冲; 其中用数据调制数据脉冲，其中参考脉冲未被调制。根据又一实施例的用于自适应射频（RF）通信的方法包括在RF频谱中接收数据脉冲; 以及从所述数据脉冲接收在时间上分离的参考脉冲，其中所述数据脉冲用数据调制，其中所述参考脉冲未被调制; 并解调脉冲。

9. 发明授权

US07548576B2 Self organization of wireless sensor networks using ultra-wideband radios 失效
标题翻译：使用超宽带无线电的无线传感器网络的自组织
公开(公告)号：US07548576B2
公开(公告)日：2009-06-16
申请号：US11165867
申请日：2005-06-24
申请人： Farid U. Dowla , Franak Nekoogar , Alex Spiridon
发明人： Farid U. Dowla , Franak Nekoogar , Alex Spiridon
IPC分类号： H04B1/69
CPC分类号： H04B1/7183
摘要： A novel UWB communications method and system that provides self-organization for wireless sensor networks is introduced. The self-organization is in terms of scalability, power conservation, channel estimation, and node synchronization in wireless sensor networks. The UWB receiver in the present invention adds two new tasks to conventional TR receivers. The two additional units are SNR enhancing unit and timing acquisition and tracking unit.
摘要翻译：介绍了一种为无线传感器网络提供自组织的新型UWB通信方法和系统。自组织是在无线传感器网络中的可扩展性，功率节省，信道估计和节点同步方面。本发明中的UWB接收机为常规TR接收机增加了两个新任务。两个附加单元是SNR增强单元和定时采集和跟踪单元。

10. 发明授权

US07305052B2 UWB communication receiver feedback loop 失效
标题翻译： UWB通信接收机反馈回路
公开(公告)号：US07305052B2
公开(公告)日：2007-12-04
申请号：US10815450
申请日：2004-03-31
申请人： Alex Spiridon , Dave Benzel , Farid U. Dowla , Faranak Nekoogar , Erwin T. Rosenbury
发明人： Alex Spiridon , Dave Benzel , Farid U. Dowla , Faranak Nekoogar , Erwin T. Rosenbury
IPC分类号： H04L27/08 , H04L27/00 , H04B1/00 , H04B7/165 , H01Q11/12
CPC分类号： H04B1/719
摘要： A novel technique and structure that maximizes the extraction of information from reference pulses for UWB-TR receivers is introduced. The scheme efficiently processes an incoming signal to suppress different types of UWB as well as non-UWB interference prior to signal detection. Such a method and system adds a feedback loop mechanism to enhance the signal-to-noise ratio of reference pulses in a conventional TR receiver. Moreover, sampling the second order statistical function such as, for example, the autocorrelation function (ACF) of the received signal and matching it to the ACF samples of the original pulses for each transmitted bit provides a more robust UWB communications method and system in the presence of channel distortions.
摘要翻译：介绍了一种使UWB-TR接收机的参考脉冲信息提取最大化的新技术和结构。该方案在信号检测之前有效地处理输入信号以抑制不同类型的UWB以及非UWB干扰。这种方法和系统增加了反馈回路机制以增强传统TR接收机中参考脉冲的信噪比。此外，对诸如接收信号的自相关函数（ACF）的二阶统计函数进行采样，并将其与针对每个发送的位的原始脉冲的ACF采样进行匹配，提供了更稳健的UWB通信方法和系统存在通道失真。

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