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    Ultra-wideband communications system
    3.
    发明授权
    Ultra-wideband communications system 失效
    超宽带通信系统

    公开(公告)号：US06810087B2

    公开(公告)日：2004-10-26

    申请号：US09753443

    申请日：2001-01-03

    申请人： Ralph Thomas Hoctor ,  Harold Woodruff Tomlinson, Jr. ,  Kenneth Brakeley Welles, II ,  John Erik Hershey

    发明人： Ralph Thomas Hoctor ,  Harold Woodruff Tomlinson, Jr. ,  Kenneth Brakeley Welles, II ,  John Erik Hershey

    IPC分类号： H04L2700

    CPC分类号： H04B1/71632 ,  H04B1/71637 ,  H04B1/7172 ,  H04B2001/6908 ,  H04B2201/71636 ,  H04L25/4902 ,  H04L27/0004

    摘要： An ultra-wideband (UWB) communications system combines the techniques of a transmitted reference (TR) and a multiple access scheme called delay hopping (DH). Combining these two techniques using UWB signaling results in a penalty in signal-to-noise ratio (SNR) over conventional pulse position modulation (PPM) techniques but avoids the synchronization difficulties associated with conventional approaches. The signaling pulse waveforms are designed to insure that their power spectral densities, after any frequency translation to the center of an operating band, are essentially spectrally disjoint with frequencies that must be protected. This TR technique is combined with the DH multiple access technique to create a UWB communications scheme that has a greater multiple access capacity than does the UWB TR technique by itself.

    摘要翻译： 超宽带（UWB）通信系统结合了传输参考（TR）和称为延迟跳变（DH）的多址方案的技术。 结合使用UWB信令的这两种技术相比传统脉冲位置调制（PPM）技术导致信噪比（SNR）的损失，但是避免了与常规方法相关的同步困难。 信号脉冲波形被设计成确保在对工作频带的中心进行任何频率转换之后它们的功率谱密度与必须被保护的频率基本上是光谱不相交的。 这种TR技术与DH多址接入技术相结合，以创建具有比UWB TR技术本身更大的多接入容量的UWB通信方案。

    Time-delayed transmitted reference spread spectrum transmitter with digital noise generator
    5.
    发明授权
    Time-delayed transmitted reference spread spectrum transmitter with digital noise generator 有权
    具有数字噪声发生器的延时发射参考扩频发射机

    公开(公告)号：US07269201B2

    公开(公告)日：2007-09-11

    申请号：US10681705

    申请日：2003-10-09

    申请人： John Erik Hershey ,  Harold Woodruff Tomlinson, Jr. ,  Kenneth Brakeley Welles II

    发明人： John Erik Hershey ,  Harold Woodruff Tomlinson, Jr. ,  Kenneth Brakeley Welles II

    IPC分类号： H04B1/69

    CPC分类号： H04B1/707

    摘要： Circuits are provided for transmitted reference spread spectrum systems using a noise-like digital sequence with delayed replica. The circuits produce the digital spreading sequences at extremely high speed, and are capable of providing a great degree of signal spreading. A first embodiment is composed of a low speed section and a high-speed section. This embodiment allows for greater power efficiency without sacrificing sequence speed. In addition, the embodiment also allows shaping of the spectrum of the high-speed digital sequence. Further, this embodiment generates an m-sequence and its near delay by storing decimated pieces of the entire m-sequence over a plurality of end-around circulating shift registers or so-called ring counters. The ring counters can be run at low speed and there is no exclusive-oring operation. A time-delayed transmitted reference spread spectrum transmitter is provided using digital noise generators that are capable of very high speed operation.

    摘要翻译： 使用具有延迟复制品的类噪声数字序列的传输参考扩频系统提供电路。 这些电路以非常高的速度产生数字扩展序列，并且能够提供很大程度的信号扩展。 第一实施例由低速段和高速段组成。 该实施例允许更高的功率效率而不牺牲序列速度。 此外，该实施例还允许对高速数字序列的频谱进行整形。 此外，该实施例通过在多个周边循环移位寄存器或所谓的环形计数器上存储整个m序列的抽取的片段来生成m序列及其近似延迟。 环形计数器可以以低速运行，没有专用操作。 使用能够进行非常高速操作的数字噪声发生器来提供时间延迟的发射参考扩频发射机。

    Transmitter location for ultra-wideband, transmitted-reference CDMA communication system
    7.
    发明授权
    Transmitter location for ultra-wideband, transmitted-reference CDMA communication system 失效
    用于超宽带，发射参考CDMA通信系统的发射机位置

    公开(公告)号：US07269427B2

    公开(公告)日：2007-09-11

    申请号：US09973140

    申请日：2001-10-09

    申请人： Ralph Thomas Hoctor ,  John Erik Hershey ,  Nick Andrew Van Stralen ,  Harold Woodruff Tomlinson, Jr.

    发明人： Ralph Thomas Hoctor ,  John Erik Hershey ,  Nick Andrew Van Stralen ,  Harold Woodruff Tomlinson, Jr.

    IPC分类号： H04Q7/20 ,  H04M11/04 ,  H04B7/00 ,  H04B7/08 ,  H04B17/00 ,  G01S13/08

    CPC分类号： H04B1/7163 ,  G01S5/06

    摘要： A system and method involve tracking the location of objects within an area of interest using transmitted-reference ultra-wideband (TR-UWB) signals. The system includes at least three base stations communicating with a central processor, at least one mobile device and at least one fixed beacon transmitter of known location. The mobile device is equipped with a transmitter for transmitting a TR-UWB signal to a base station, which then determines a location of the mobile device based on time difference of arrival information between the beacon transmitters and mobile devices measured at all the base stations. Preferably, the area of interest includes a plurality of mobile devices each transmitting a delay-hopped TR-UWB signal according to a code-division multiple access scheme. The mobile devices may be attached to a patient and/or a medical asset within the hospital for tracking purposes. Additionally, patient medical information may be transmitted with the TR-UWB signals to allow patient monitoring to occur simultaneously with asset/patient tracking.

    摘要翻译： 一种系统和方法包括使用发射参考超宽带（TR-UWB）信号来跟踪感兴趣区域内的物体的位置。 该系统包括与中央处理器，至少一个移动设备和已知位置的至少一个固定信标发射机通信的至少三个基站。 移动设备配备有用于向基站发送TR-UWB信号的发射机，其基于在所有基站测量的信标发射机和移动设备之间的到达信息的时间差确定移动设备的位置。 优选地，感兴趣区域包括多个移动设备，每个移动设备根据码分多址方案发送延迟跳跃的TR-UWB信号。 移动设备可以附接到医院内的患者和/或医疗资产以用于跟踪目的。 另外，可以用TR-UWB信号发送患者医疗信息，以便患者监视与资产/患者跟踪同时发生。

    SYSTEM AND METHOD FOR OPTICAL LOCOMOTIVE DECOUPLING DETECTION
    9.
    发明申请
    SYSTEM AND METHOD FOR OPTICAL LOCOMOTIVE DECOUPLING DETECTION 审中-公开
    光学去磁检测系统与方法

    公开(公告)号：US20100148013A1

    公开(公告)日：2010-06-17

    申请号：US12638123

    申请日：2009-12-15

    申请人： Rahul Bhotika ,  Kenneth Brakeley Welles, II ,  John Erik Hershey ,  David Michael Davenport

    发明人： Rahul Bhotika ,  Kenneth Brakeley Welles, II ,  John Erik Hershey ,  David Michael Davenport

    IPC分类号： B61L23/00

    CPC分类号： B61L15/0054 ,  B61G7/14 ,  B61J3/00

    摘要： An apparatus and method for indicating whether a coupler of a locomotive is in a coupled or uncoupled state is provided. The apparatus comprising: an optical sensor positioned on a portion of the coupler, wherein the sensor provides a real-time signal indicative of either a coupled or an uncoupled state of a coupler, wherein the signal is transmitted wirelessly by a transmitter in operable communication with the sensor. The method comprising: providing a signal indicative of the presence or proximity of a second coupler to the first coupler, the signal being provided by an optical sensor configured to provide the signal as the state of the coupler has changed; transmitting the signal wirelessly to a controller; processing the signal with a control algorithm resident upon the controller; and providing visually perceivable indication of the position of the coupler.

    摘要翻译： 提供一种用于指示机车的耦合器是否处于耦合或非耦合状态的装置和方法。 所述装置包括：位于所述耦合器的一部分上的光学传感器，其中所述传感器提供指示耦合器的耦合或非耦合状态的实时信号，其中所述信号由与所述耦合器可操作地通信的发射机无线地传输， 传感器。 该方法包括：提供指示第二耦合器到第一耦合器的存在或接近的信号，所述信号由配置成随着耦合器的状态改变而提供信号的光学传感器提供; 将信号无线地发送到控制器; 用驻留在控制器上的控制算法处理信号; 并且提供耦合器的位置的视觉上可感知的指示。