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148 条记录 (耗时 0.031 秒)

    System and method for position determination by impulse radio
    73.
    发明授权
    System and method for position determination by impulse radio 有权
    脉冲无线电定位系统及方法

    公开(公告)号：US07710320B2

    公开(公告)日：2010-05-04

    申请号：US11979195

    申请日：2007-10-31

    申请人： Larry W. Fullerton ,  James L. Richards ,  Ivan A. Cowie

    发明人： Larry W. Fullerton ,  James L. Richards ,  Ivan A. Cowie

    IPC分类号： G01S1/24 ,  G06F1/10

    CPC分类号： H04B1/7183 ,  G01S13/42 ,  G01S13/76 ,  H04B2001/6908

    摘要： A method for producing a first time base for a first ultra wideband radio obtains a time reference signal and phase locks a clock signal to the time reference signal The clock signal is counted down using a counter to produce the first time base. The counter is a binary counter that has a modulo count equal to a modulo repeat length of a code corresponding to a ultra wideband signal.

    摘要翻译： 用于产生第一超宽带无线电的第一时基的方法获得时间参考信号，并将时钟信号锁定到时间参考信号。时钟信号使用计数器向下计数以产生第一时基。 计数器是一个二进制计数器，其具有等于与超宽带信号相对应的代码的模数重复长度的模数。

    System and method for intrusion detection using a time domain radar array
    74.
    发明授权
    System and method for intrusion detection using a time domain radar array 有权
    使用时域雷达阵列的入侵检测系统和方法

    公开(公告)号：US06710736B2

    公开(公告)日：2004-03-23

    申请号：US10449602

    申请日：2003-06-02

    申请人： Larry W. Fullerton ,  James L. Richards

    发明人： Larry W. Fullerton ,  James L. Richards

    IPC分类号： G01S1362

    CPC分类号： G01S13/888 ,  G01S7/003 ,  G01S7/4004 ,  G01S13/0209 ,  G01S13/04 ,  G01S13/56 ,  G01S13/87 ,  G01S13/878 ,  G01S13/88 ,  G01S13/89 ,  G08B13/1636

    摘要： A system and method for highly selective intrusion detection using a sparse array of time modulated ultra wideband (TM-UWB) radars. Two or more TM-UWB radars are arranged in a sparse array around the perimeter of a building. Each TM-UWB radar transmits ultra wideband pulses that illuminate the building and the surrounding area. Signal return data is processed to determine, among other things, whether an alarm condition has been triggered. High resolution radar images are formed that give an accurate picture of the inside of the building and the surrounding area. This image is used to detect motion in a highly selective manner and to track moving objects within the building and the surrounding area. Motion can be distinguished based on criteria appropriate to the environment in which the intrusion detection system operates.

    摘要翻译： 使用时间调制超宽带（TM-UWB）雷达的稀疏阵列进行高选择性入侵检测的系统和方法。 两个或多个TM-UWB雷达以围绕建筑物周边的稀疏阵列布置。 每个TM-UWB雷达都会传输照明建筑物和周围区域的超宽带脉冲。 处理信号返回数据以确定报警条件是否已被触发。 形成了高分辨率雷达图像，可以准确地显示建筑物及周边地区的内部图像。 该图像用于以高度选择性的方式检测运动并跟踪建筑物和周围区域内的运动物体。 运动可以根据适合入侵检测系统运行的环境的标准进行区分。

    System and method for distance measurement by inphase and quadrature signals in a radio system
    75.
    发明授权
    System and method for distance measurement by inphase and quadrature signals in a radio system 有权

    公开(公告)号：US06674396B2

    公开(公告)日：2004-01-06

    申请号：US09960278

    申请日：2001-09-21

    申请人： James L. Richards ,  Larry W. Fullerton

    发明人： James L. Richards ,  Larry W. Fullerton

    IPC分类号： G01S1376

    CPC分类号： G01S13/08 ,  G01S13/76 ,  G01S13/765 ,  G01S13/87 ,  G01S13/913

    摘要： A system and a method for distance measurement utilizes a radio system. The distance is measured by determining the time it takes a pulse train to travel from a first radio transceiver to a second radio transceiver and then from the second radio transceiver back to the first radio transceiver. The actual measurement is a two step process. In the first step, the distance is measured in coarse resolution, and in the second step, the distance is measured in fine resolution. A first pulse train is transmitted using a transmit time base from the first radio transceiver. The first pulse train is received at a second radio transceiver. The second radio transceiver synchronizes its time base with the first pulse train before transmitting a second pulse train back to the first radio transceiver, which then synchronizes a receive time base with the second pulse train. The time delay between the transmit time base and the receive time base can then be determined. The time delay indicates the total time of flight of the first and second pulse trains. The time delay comprises coarse and fine distance attributes. The coarse distance between the first and second radio transceivers is determined. The coarse distance represents the distance between the first and second radio transceivers in coarse resolution. An inphase (I) signal and a quadrature (Q) signal are produced from the time delay to determine the fine distance attribute. The fine distance indicates the distance between the first and second transceivers in fine resolution. The distance between the first and second radio transceivers is then determined from the coarse distance and the fine distance attributes.

    System and method for position determination by impulse radio using round trip time-of-flight
    76.
    发明授权
    System and method for position determination by impulse radio using round trip time-of-flight 有权
    通过脉冲无线电使用往返飞行时间进行位置确定的系统和方法

    公开(公告)号：US06611234B2

    公开(公告)日：2003-08-26

    申请号：US09954204

    申请日：2001-09-18

    申请人： Larry W. Fullerton ,  James L. Richards ,  Ivan A. Cowie

    发明人： Larry W. Fullerton ,  James L. Richards ,  Ivan A. Cowie

    IPC分类号： G01S302

    CPC分类号： H04B1/7183 ,  G01S13/42 ,  G01S13/76 ,  H04B2001/6908

    摘要： A system and a method for position determination by impulse radio using a first transceiver having a first clock providing a first reference signal and a second transceiver placed spaced from the first transceiver. The system determines the position of the second transceiver. The second transceiver has a second clock that provides a second reference signal. A first sequence of pulses are transmitted from the first transceiver. The first sequence of pulses are then received at the second transceiver and the second transceiver is then synchronized with the first sequence of pulses. A second sequence of pulses are transmitted from the second transceiver. The first transceiver receives the second sequence of pulses and the first transceiver is synchronized with the second sequence of pulses. A delayed first reference signal is generated in response to the synchronization with the second sequence of pulses. A time difference between the delayed first reference signal and the first reference signal is then measured. The time difference indicates a total time of flight of the first and second sequence of pulses. The distance between the first and the second transceiver is determined from the time difference. The direction of the second transceiver from the first transceiver is determined using a directional antenna. Finally, the position of the second transceiver is determined using the distance and the direction.

    摘要翻译： 一种利用具有提供第一参考信号的第一时钟和与第一收发器间隔开的第二收发器的第一收发器的脉冲无线电定位的系统和方法。 该系统确定第二收发器的位置。 第二收发器具有提供第二参考信号的第二时钟。 从第一收发器发送第一脉冲序列。 然后在第二收发器处接收第一脉冲序列，然后第二收发器与第一脉冲序列同步。 从第二收发器发送第二脉冲序列。 第一收发器接收第二脉冲序列，并且第一收发器与第二脉冲序列同步。 响应于与第二脉冲序列的同步而产生延迟的第一参考信号。 然后测量延迟的第一参考信号和第一参考信号之间的时间差。 时间差表示第一和第二脉冲序列的总飞行时间。 从时差确定第一和第二收发器之间的距离。 使用定向天线确定来自第一收发器的第二收发器的方向。 最后，使用距离和方向来确定第二收发器的位置。

    System for fast lock and acquisition of ultra-wideband signals
    78.
    发明授权
    System for fast lock and acquisition of ultra-wideband signals 有权
    用于快速锁定和采集超宽带信号的系统

    公开(公告)号：US06556621B1

    公开(公告)日：2003-04-29

    申请号：US09538292

    申请日：2000-03-29

    申请人： James L. Richards ,  Larry W. Fullerton ,  Ivan A. Cowie ,  William D. Welch, Jr. ,  Randall S. Stanley

    发明人： James L. Richards ,  Larry W. Fullerton ,  Ivan A. Cowie ,  William D. Welch, Jr. ,  Randall S. Stanley

    IPC分类号： H04B169

    CPC分类号： H04B1/71637 ,  H04B1/7183 ,  H04B1/719 ,  H04B2001/6908

    摘要： A system and method for detecting an impulse radio signal obtains a template pulse train and a received impulse radio signal. The system compares the template pulse train and the received impulse radio signal to obtain a comparison result. The system performs a threshold check on the comparison result. If the comparison result passes the threshold check, the system locks on the received impulse radio signal. The system may also perform a quick check, a sychronization check, and/or a command check of the impulse radio signal.

    摘要翻译： 用于检测脉冲无线电信号的系统和方法获得模板脉冲串和接收到的脉冲无线电信号。 该系统比较模板脉冲串和接收到的脉冲无线电信号以获得比较结果。 系统对比较结果进行阈值检查。 如果比较结果通过阈值检查，则系统锁定接收到的脉冲无线电信号。 系统还可以执行快速检查，同步检查和/或脉冲无线电信号的命令检查。

    Precision timing generator system and method
    80.
    发明授权
    Precision timing generator system and method 有权
    精密定时发生器系统及方法

    公开(公告)号：US06304623B1

    公开(公告)日：2001-10-16

    申请号：US09146524

    申请日：1998-09-03

    申请人： James L. Richards ,  Preston Jett ,  Larry W. Fullerton ,  Lawrence E. Larson ,  David A. Rowe

    发明人： James L. Richards ,  Preston Jett ,  Larry W. Fullerton ,  Lawrence E. Larson ,  David A. Rowe

    IPC分类号： H04C700

    CPC分类号： H03L7/18 ,  H04B1/7163 ,  H04B1/71635 ,  H04B1/7183

    摘要： A frame reference signal is produced as a function of a clock signal. A first timing generator generates a coarse timing signal having a nominal period and a transition occurring at a precise temporal position with respect to the nominal period. The nominal period is a function of the frame reference signal. The temporal position is a function of a first input timing command and the clock signal. A second timing generator generates at least one fine timing transition as a function of a second input timing command and the clock signal. A combiner circuit uses the coarse timing signal to select one of the at least one fine timing transitions to output a precise timing signal, wherein the precise timing signal has a high temporal precision with respect to the frame reference signal.

    摘要翻译： 作为时钟信号的函数产生帧参考信号。 第一定时发生器产生具有标称周期和在相对于标称周期的精确时间位置发生的转变的粗定时信号。 标称周期是帧参考信号的函数。 时间位置是第一输入定时命令和时钟信号的函数。 第二定时发生器产生作为第二输入定时命令和时钟信号的函数的至少一个精细定时转换。 组合器电路使用粗定时信号来选择至少一个精细定时转换中的一个以输出精确定时信号，其中精确定时信号相对于帧参考信号具有高的时间精度。