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    Vehicle tracker, mileage-time monitor and calibrator
    1.
    发明授权
    Vehicle tracker, mileage-time monitor and calibrator 有权
    车载追踪器，里程时间监视器和校准器

    公开(公告)号：US06353796B1

    公开(公告)日：2002-03-05

    申请号：US09513265

    申请日：2000-02-24

    申请人： John F. Schipper ,  Eric B. Rodal ,  James M. Janky ,  David J. Cowl

    发明人： John F. Schipper ,  Eric B. Rodal ,  James M. Janky ,  David J. Cowl

    IPC分类号： G06G778

    CPC分类号： G01C22/02 ,  B60G2400/824 ,  B60G2401/16 ,  B60G2600/202 ,  G01C21/26 ,  G01S19/39 ,  G01S19/47 ,  G01S19/52 ,  G01S2205/002

    摘要： A system for monitoring location and speed of a vehicle, using a location determination system such as GPS, GLONASS or LORAN and an optional odometer or speedometer, for determining and recording the locations and times at which vehicle speed is less than a threshold speed for at least a threshold time (called a “vehicle arrest event”). Vehicle arrest event locations, times and time intervals are stored and/or printed to provide trip and mileage records and for efficiency monitoring. A vehicle odometer and/or speedometer can also be calibrated and/or corrected using this approach.

    摘要翻译： 一种用于监测车辆的位置和速度的系统，使用诸如GPS，GLONASS或LORAN的位置确定系统和可选的里程表或速度计来确定和记录车辆速度小于阈值速度的位置和时间 至少一个门槛时间（称为“车辆逮捕事件”）。 车辆逮捕事件位置，时间和时间间隔被存储和/或打印以提供行程和里程记录以及效率监视。 车辆里程表和/或速度计也可以使用这种方法进行校准和/或校正。

    Antenna with curved dipole elements
    4.
    发明授权
    Antenna with curved dipole elements 失效
    具有弯曲偶极子元件的天线

    公开(公告)号：US5173715A

    公开(公告)日：1992-12-22

    申请号：US714192

    申请日：1991-06-12

    申请人： Eric B. Rodal ,  Michael C. Detro ,  David R. Gildea ,  James M. Janky

    发明人： Eric B. Rodal ,  Michael C. Detro ,  David R. Gildea ,  James M. Janky

    IPC分类号： H01Q21/20 ,  H01Q21/26

    CPC分类号： H01Q21/26 ,  H01Q21/205

    摘要： An antenna comprises a base plate forming a ground plane, a coaxial feed serving as a mast connected to the base plate and extending along an axis that is normal to the ground plane, and two orthogonal dipoles each formed of two elements. Each dipole element has a first end connected to and supported by the mast at a first location spaced apart from the ground plane by a predetermined distance and a second end closer to the ground plane and exhibits a curvature in a plane containing the mast.

    摘要翻译： 天线包括形成接地平面的基板，用作连接到基板并沿着垂直于接地平面的轴延伸的桅杆的同轴馈电，以及由两个元件形成的两个正交偶极子。 每个偶极元件具有在与接地平面隔开预定距离的第一位置处连接并由桅杆支撑的第一端，并且靠近接地平面的第二端并且在包含桅杆的平面中呈现曲率。

    Integrated circuit using a power supply input for digital logic
    5.
    发明授权
    Integrated circuit using a power supply input for digital logic 失效
    集成电路使用数字逻辑电源输入

    公开(公告)号：US6115595A

    公开(公告)日：2000-09-05

    申请号：US71977

    申请日：1998-05-04

    申请人： Eric B. Rodal ,  Chung Y. Lau

    发明人： Eric B. Rodal ,  Chung Y. Lau

    IPC分类号： H04B1/28

    CPC分类号： H04B1/28 ,  G01S19/34 ,  G01S19/32

    摘要： A GPS receiver including an RF GPS integrated circuit downconverter having a standby mode controlled by a power supply input used as a logic signal. The RF GPS integrated circuit includes a synthesizer for generating LO signals, first and second downconverters for using the LO signals for downconverting the GPS signal, and a sampler for using a clock signal for providing in-phase and quadrature phase sampled output signals representative of the GPS signal. The synthesizer includes a multi-mode divider for providing substantially the same first LO frequency at about the midpoint of the L1 and L2 GPS frequencies when either of an external or internally generated reference frequency is selected. A GPS digital signal processor integrated circuit issues the logic signal and the clock signal from a single pin.

    摘要翻译： 一种GPS接收机，包括具有由用作逻辑信号的电源输入控制的待机模式的RF GPS集成电路下变频器。 RF GPS集成电路包括用于产生LO信号的合成器，用于使用LO信号进行下变频的GPS信号的第一和第二下变频器，以及用于使用时钟信号的采样器，用于提供表示该信号的同相和正交相位采样的输出信号 GPS信号。 合成器包括多模式分频器，用于当选择外部或内部产生的参考频率时，在L1和L2 GPS频率的中点附近提供基本相同的第一LO频率。 GPS数字信号处理器集成电路从单个引脚发出逻辑信号和时钟信号。

    GPS receiver having a rapid acquisition of GPS satellite signals
    6.
    发明授权
    GPS receiver having a rapid acquisition of GPS satellite signals 失效
    具有快速获取GPS卫星信号的GPS接收机

    公开(公告)号：US5594453A

    公开(公告)日：1997-01-14

    申请号：US332958

    申请日：1994-11-01

    申请人： Eric B. Rodal ,  Dominic G. Farmer ,  Chung Y. Lau

    发明人： Eric B. Rodal ,  Dominic G. Farmer ,  Chung Y. Lau

    IPC分类号： G01S1/00 ,  G01S5/02

    CPC分类号： G01S19/235 ,  G01S19/34

    摘要： A GPS receiver having a rapid acquisition of a GPS satellite signal when a normal operational mode is entered after a low power standby mode. The GPS receiver includes an RF section for receiving the GPS satellite signal and providing an GPS IF signal, a correlator section for providing a correlation signal for the correlation between the GPS IF signal and a GPS replica signal, and a microprocessor section for receiving the correlation signal and calculating a geographical location of the GPS receiver. The GPS replica signal is based upon a reference frequency from a reference oscillator and a reference time from a timer. In the standby mode, the operation of the RF section, correlator section, and microprocessor section is inhibited while the reference oscillator and time continue to operate. In order to increase acquisition speed upon entering the normal mode, the microprocessor section provides the correlator section with an initial frequency adjustment to correct for drift in the reference frequency during the standby mode. The microprocessor section provides the initial frequency adjustment based upon a learned frequency correction that is based upon the frequency adjustment that results in acquisition of the GPS satellite signal after alternating one or more times between the standby mode and the normal mode. Alternately, the initial frequency adjustment is calculated from a stored frequency/temperature relationship and a temperature for the reference oscillator measured by a temperature sensor.

    摘要翻译： 当在低功率待机模式之后进入正常操作模式时，具有快速获取GPS卫星信号的GPS接收机。 GPS接收机包括用于接收GPS卫星信号并提供GPS IF信号的RF部分，用于提供GPS IF信号与GPS复制信号之间的相关性的相关信号的相关器部分和用于接收相关性的微处理器部分 信号并计算GPS接收机的地理位置。 GPS复制信号基于来自参考振荡器的参考频率和来自定时器的参考时间。 在待机模式下，当参考振荡器和时间继续工作时，禁止RF部分，相关器部分和微处理器部分的操作。 为了在进入正常模式时提高采集速度，微处理器部分为相关器部分提供初始频率调整，以在待机模式期间校正参考频率中的漂移。 微处理器部分基于在待机模式和正常模式之间交替一次或多次之后基于进行GPS卫星信号获取的频率调整的学习频率校正来提供初始频率调整。 或者，初始频率调整是由存储的频率/温度关系和由温度传感器测量的基准振荡器的温度计算的。

    GPS/radio antenna combination
    7.
    发明授权
    GPS/radio antenna combination 失效
    GPS /无线电天线组合

    公开(公告)号：US5654717A

    公开(公告)日：1997-08-05

    申请号：US510840

    申请日：1995-08-03

    申请人： Mark E. Nichols ,  Eric B. Rodal

    发明人： Mark E. Nichols ,  Eric B. Rodal

    IPC分类号： G01S1/00 ,  G01S5/14 ,  G01S19/48 ,  H01Q1/38 ,  H01Q9/04 ,  H01Q9/30 ,  H01Q9/32 ,  H01Q21/28 ,  H01Q21/30 ,  H04B7/185 ,  G01S5/02

    CPC分类号： H01Q1/38 ,  H01Q21/28 ,  H01Q21/30 ,  H01Q9/0407 ,  H01Q9/30 ,  H01Q9/32 ,  G01S19/36 ,  G01S19/41

    摘要： A GPS/radio antenna for receiving a GPS satellite signal and a DGPS radio signal. The GPS/radio antenna includes a GPS antenna using a microstrip antenna element for receiving the GPS signal having GPS location determination information, a radio antenna for receiving a DGPS radio signal in the FM broadcast frequency range having DGPS corrections, an enclosure, and a cable. The GPS/radio antenna may be included in a GPS/DGPS receiver system also including a receiver unit with an FM DGPS receiver for demodulating the DGPS radio signal and providing DGPS corrections, and a differential-ready GPS receiver for providing a differentially-corrected GPS location.

    摘要翻译： 一种用于接收GPS卫星信号和DGPS无线电信号的GPS /无线电天线。 GPS /无线电天线包括使用微带天线元件的GPS天线，用于接收具有GPS位置确定信息的GPS信号，用于在具有DGPS校正的FM广播频率范围中接收DGPS无线电信号的无线电天线，外壳和电缆 。 GPS /无线电天线可以包括在还包括具有用于解调DGPS无线电信号并提供DGPS校正的FM DGPS接收机的接收机单元的GPS / DGPS接收机系统中，以及用于提供差分校正的GPS 位置。

    Dual frequency vertical antenna
    8.
    发明授权
    Dual frequency vertical antenna 失效
    双频垂直天线

    公开(公告)号：US5604506A

    公开(公告)日：1997-02-18

    申请号：US354617

    申请日：1994-12-13

    申请人： Eric B. Rodal

    发明人： Eric B. Rodal

    IPC分类号： H01Q5/00 ,  H01Q5/357 ,  H01Q5/40 ,  H01Q9/40

    CPC分类号： H01Q9/40 ,  H01Q5/357 ,  H01Q5/40

    摘要： A dual frequency vertical antenna for radiating a first and a second airwave signal in response to a first and a second conducted signal, the first airwave signal having a first frequency and the second airwave signal having a second frequency lower than one-half the first frequency. The antenna includes a horizontal base member and a vertical mast, including a coaxially disposed rod, projecting upward from the base member to a masthead. For feeding the conducted signals, a lower mast extension projecting downward from the base member and a tuning sleeve projecting either upward or downward from the base member are tuned to 1/4 wavelength at the first frequency and a single coaxial cable is connected between the base member and a feedpoint on the rod. The first airwave signal radiates from a dipole formed of an 1/4 wavelength upper rod extension extending upward from the masthead and a concentric 1/4 wavelength upper sleeve external to the mast projecting downward from the masthead. The mast is 1/4 wavelength at the second frequency for radiating the second airwave signal from a dipole formed of the mast and the base member.

    摘要翻译： 一种双频垂直天线，用于响应于第一和第二传导信号辐射第一和第二空气波信号，所述第一空气波信号具有第一频率，并且所述第二空气波信号具有低于第一频率的二分之一的第二频率 。 天线包括水平基座构件和垂直桅杆，包括同轴设置的杆，从基座构件向上突出到桅顶。 为了馈送传导信号，从基座构件向下突出的下桅杆延伸部分和从底座部件向上或向下伸出的调谐套筒被调谐到+ E，第一频率的1/4 / EE +波长和单个同轴 电缆连接在基座和杆上的馈电点之间。 第一个空气波信号从由桅顶向上延伸的+ E，fra 1/4 + EE波长的上杆延伸部形成的偶极子辐射，并且在桅杆外部同心的+ E，fra 1/4 + EE波长上套筒向下突出 从桅顶。 桅杆是第二频率处的+ E，fra 1/4 + EE波长，用于从由桅杆和基座构件形成的偶极辐射第二空气波信号。

    Method and apparatus for providing a digital automatic gain control (AGC)
    9.
    发明授权
    Method and apparatus for providing a digital automatic gain control (AGC) 有权
    用于提供数字自动增益控制（AGC）的方法和装置

    公开(公告)号：US07936850B2

    公开(公告)日：2011-05-03

    申请号：US11654379

    申请日：2007-01-17

    申请人： Eric B. Rodal ,  Charles Abraham

    发明人： Eric B. Rodal ,  Charles Abraham

    IPC分类号： H04L27/08

    CPC分类号： H03G3/3052

    摘要： A method and apparatus for providing a digital automatic gain control (AGC) for a radio-frequency (RF) receiver. The receiver comprises a logarithmic analog-to-digital converter for sampling the analog RF signals, a FIR filter for filtering the digitized signals, a resampler for resampling the digitized signals, and an automatic gain control circuit. The AGC circuit controls the resampling process to provide automatic gain control function in the digital domain. The resampler circuit has as its input a digital signal having a first plurality of bits. The output signal from the resampler has a second plurality of bits, where the second plurality of bits are less than the first plurality of bits. The automatic gain control circuit controls the resampling of the first plurality of bits to form the second plurality of bits in accordance with an automatic gain control signal.

    摘要翻译： 一种用于为射频（RF）接收机提供数字自动增益控制（AGC）的方法和装置。 接收机包括用于对模拟RF信号进行采样的对数模数转换器，用于对数字化信号进行滤波的FIR滤波器，对数字化信号进行重新取样的重采样器和自动增益控制电路。 AGC电路控制重采样过程，以在数字域中提供自动增益控制功能。 重采样电路具有作为其输入的具有第一多个位的数字信号。 来自重采样器的输出信号具有第二多个位，其中第二多个位小于第一多个位。 自动增益控制电路根据自动增益控制信号控制第一多个比特的重采样以形成第二多个比特。

    RF integrated circuit for downconverting a GPS signal
    10.
    发明授权
    RF integrated circuit for downconverting a GPS signal 失效
    RF集成电路，用于下变频GPS信号

    公开(公告)号：US06356602B1

    公开(公告)日：2002-03-12

    申请号：US09073207

    申请日：1998-05-04

    申请人： Eric B. Rodal ,  Chung Y. Lau ,  Reed A. Parker ,  Gary L. Wagner

    发明人： Eric B. Rodal ,  Chung Y. Lau ,  Reed A. Parker ,  Gary L. Wagner

    IPC分类号： H04L2706

    CPC分类号： G01S19/36 ,  G01S19/34 ,  H03B5/1209 ,  H03B5/1231 ,  H03B5/124 ,  H03B2201/0208 ,  H03D7/163 ,  H03J1/0041 ,  H04L27/06

    摘要： A GPS receiver and an RF GPS integrated circuit for receiving a GPS signal. The GPS integrated circuit includes a synthesizer for generating LO signals, first and second downconverters for using the LO signals for downconverting the GPS signal, and a sampler for providing in-phase and quadrature phase sampled output signals representative of the GPS signal. The synthesizer includes a multi-mode divider for providing substantially the same first LO frequency at about the midpoint of the L1 and L2 GPS lo frequencies for either of two reference frequencies. The RF GPS integrated circuit uses an entirely on-chip voltage controlled oscillator (VCO) having a resonator for generating the LO signals and an entirely on-chip filter for filtering a first intermediate frequency signal.

    摘要翻译： GPS接收机和用于接收GPS信号的RF GPS集成电路。 GPS集成电路包括用于产生LO信号的合成器，用于使用LO信号进行下变频的GPS信号的第一和第二下变频器，以及用于提供表示GPS信号的同相和正交相位采样的输出信号的采样器。 合成器包括多模式分频器，用于在两个参考频率中的任一个的L1和L2 GPS lo频率的中点附近提供基本相同的第一LO频率。 RF GPS集成电路使用具有用于产生LO信号的谐振器的完全片上压控振荡器（VCO）和用于滤波第一中频信号的完全片上滤波器。