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    • 4. 发明授权
    • Time-delayed transmitted reference spread spectrum transmitter with digital noise generator
    • 具有数字噪声发生器的延时发射参考扩频发射机
    • US07269201B2
    • 2007-09-11
    • US10681705
    • 2003-10-09
    • John Erik HersheyHarold Woodruff Tomlinson, Jr.Kenneth Brakeley Welles II
    • John Erik HersheyHarold Woodruff Tomlinson, Jr.Kenneth Brakeley Welles II
    • H04B1/69
    • H04B1/707
    • 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.
    • 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。
    • 7. 发明授权
    • Transmitter location for ultra-wideband, transmitted-reference CDMA communication system
    • 用于超宽带,发射参考CDMA通信系统的发射机位置
    • US07269427B2
    • 2007-09-11
    • US09973140
    • 2001-10-09
    • Ralph Thomas HoctorJohn Erik HersheyNick Andrew Van StralenHarold Woodruff Tomlinson, Jr.
    • Ralph Thomas HoctorJohn Erik HersheyNick Andrew Van StralenHarold Woodruff Tomlinson, Jr.
    • H04Q7/20H04M11/04H04B7/00H04B7/08H04B17/00G01S13/08
    • H04B1/7163G01S5/06
    • 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.
    • 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。
    • 8. 发明授权
    • Local communication network for power reduction and enhanced reliability
in a multiple node tracking system
    • 多节点跟踪系统的本地通信网络,用于降低功率并提高可靠性
    • US5691980A
    • 1997-11-25
    • US484750
    • 1995-06-07
    • Kenneth Brakeley Welles, IIJerome Johnson TiemannSandeep ChennakeshuHarold Woodruff Tomlinson, Jr.
    • Kenneth Brakeley Welles, IIJerome Johnson TiemannSandeep ChennakeshuHarold Woodruff Tomlinson, Jr.
    • G01C21/00B61L25/02G01S5/00G01S19/03G01S19/21G07C5/00G08B25/04G08G1/127H04B7/212H04L12/28H04B7/185
    • H04W84/20B61L25/021B61L25/025G01S5/0027G08G1/127B61L2205/04G01S2205/002Y02B60/50
    • A mobile local area network (LAN) of tracked assets utilizing minimal power and bandwidth allows a large number of assets to be tracked in a practical manner. The mobile LAN is established between a plurality of tracking units in close proximity. Assets are approximately located according to their connection in the mobile LAN where the exact location of at least one of the network nodes is known. Each tracked asset has capability to independently determine and report its position to a central station, and each asset also has capability to communicate locally with other cooperative assets via the LAN. The LAN is dynamically reconfigurable so that as other cooperative assets come into proximity, they can join the network, and as others move away, they can leave the network. Within the network, a protocol is followed which assigns one of the assets to be the "master" and all others to be "slaves". The master asset takes responsibility for determining its own exact geographical position via LORAN, OMEGA, Global Positioning System (GPS) or other navigational aid. When connected in a LAN, slave assets report their ID to the master asset and do not determine their own locations in order to conserve power. The master reports its location and ID, as well as the IDs of the other assets in the LAN, to the central station. Uncertainty in the location of a slave asset is limited by the known possible geographical extent of the LAN which is known a priori.
    • 使用最小功率和带宽的跟踪资产的移动局域网(LAN)允许以实际的方式跟踪大量资产。 在紧邻的多个跟踪单元之间建立移动LAN。 资产大致上根据它们在移动LAN中的连接而定位,其中至少一个网络节点的确切位置是已知的。 每个跟踪资产都有能力独立地确定并向中心站报告其位置,每个资产还具有通过局域网与其他合作资产进行本地通信的能力。 LAN可动态重新配置,以便随着其他合作资产的接近,他们可以加入网络,而随着其他人的移动,他们可以离开网络。 在网络中,遵循一个协议,将一个资产分配为“主”,所有其他资源都将作为“从属”。 主资产负责通过LORAN,OMEGA,全球定位系统(GPS)或其他导航辅助来确定其自己的确切地理位置。 当连接到局域网时,从属资产将其ID标识为主资产,并且不确定自己的位置以节省电力。 主人将其位置和ID以及LAN中其他资产的ID报告给中心站。 从属资产位置的不确定性受到先验已知的LAN已知可能的地理范围的限制。