利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

14 条记录 (耗时 0.022 秒)

    Pseudorandom noise ranging receiver which compensates for multipath distortion by dynamically adjusting the time delay spacing between early and late correlators
    1.
    发明授权
    Pseudorandom noise ranging receiver which compensates for multipath distortion by dynamically adjusting the time delay spacing between early and late correlators 失效
    伪随机噪声测距接收机，通过动态调整早期和晚期相关器之间的时间间隔来补偿多径失真

    公开(公告)号：US5495499A

    公开(公告)日：1996-02-27

    申请号：US383725

    申请日：1995-02-03

    申请人： Patrick Fenton ,  Albert J. Van Dierendonck

    发明人： Patrick Fenton ,  Albert J. Van Dierendonck

    IPC分类号： G01S1/00 ,  H04B1/7085 ,  H04B1/709 ,  H04L9/00

    CPC分类号： H04B1/7085 ,  G01S19/215 ,  G01S19/22 ,  G01S19/30 ,  G01S19/37 ,  G01S19/426 ,  H04B1/709 ,  G01S19/29

    摘要： A receiver for pseudorandom noise (PRN) encoded signals consisting of a sampling circuit, multiple carrier and code synchronizing circuits, and multiple digital autocorrelators. The sampling circuit provides digital samples of a received composite signal to each of the several receiver channel circuits. The synchronizing circuits are preferably non-coherent, in the sense that they track any phase shifts in the received signal and adjust the frequency and phase of a locally generated carrier reference signal accordingly, even in the presence of Doppler or ionospheric distortion. The autocorrelators in each channel form a delay lock loop (DLL) which correlates the digital samples of the composite signal with locally generated PRN code values to produce a plurality of (early, late), or (punctual, early-minus-late) correlation signals. The time delay spacing between the (early, late), and (punctual, early-minus-late) correlation signals are dynamically adjusted, such that in an initial acquisition mode, the delay spacing is relatively wide, on the order of approximately one PRN code chip time; once PRN code lock is achieved, the code delay spacing is narrowed to a fraction of a PRN code chip time.

    摘要翻译： 用于由抽样电路，多载波和码同步电路以及多个数字自相关器组成的伪随机噪声（PRN）编码信号的接收机。 采样电路将接收到的复合信号的数字样本提供给几个接收机通道电路中的每一个。 在同步电路优选地是非相干的，即在它们跟踪接收信号中的任何相移并相应地调整本地产生的载波参考信号的频率和相位的意义上，即使在存在多普勒或电离层失真的情况下也是如此。 每个通道中的自相关器形成延迟锁定环（DLL），其将复合信号的数字样本与本地生成的PRN码值相关联，以产生多个（早，晚）或（准时，早 - 减 - 晚）相关 信号。 （早，晚）和（准时，早 - 晚 - 晚）相关信号之间的时间延迟间隔被动态调整，使得在初始采集模式中，延迟间隔相对较宽，约为一个PRN 代码片时间; 一旦实现了PRN码锁定，码延迟间隔被缩小到PRN码片片时间的一小部分。

    Pseudorandom noise ranging receiver which compensates for multipath distortion by dynamically adjusting the time delay spacing between early and late correlators
    2.
    发明授权
    Pseudorandom noise ranging receiver which compensates for multipath distortion by dynamically adjusting the time delay spacing between early and late correlators 失效
    伪随机噪声测距接收机，通过动态调整早期和晚期相关器之间的时间间隔来补偿多径失真

    公开(公告)号：US5390207A

    公开(公告)日：1995-02-14

    申请号：US217768

    申请日：1994-03-24

    申请人： Patrick Fenton ,  Albert J. Van Dierendonck

    发明人： Patrick Fenton ,  Albert J. Van Dierendonck

    IPC分类号： G01S1/00 ,  H04B1/7085 ,  H04B1/709 ,  G01S5/02 ,  H04B7/185

    CPC分类号： H04B1/7085 ,  G01S19/215 ,  G01S19/22 ,  G01S19/30 ,  G01S19/37 ,  G01S19/426 ,  H04B1/709 ,  G01S19/29

    摘要： A receiver for pseudorandom noise (PRN) encoded signals consisting of a sampling circuit, multiple carrier and code synchronizing circuits, and multiple digital autocorrelators. The sampling circuit provides digital samples of a received composite signal to each of the several receiver channel circuits. The synchronizing circuits are preferably non-coherent, in the sense that they track any phase shifts in the received signal and adjust the frequency and phase of a locally generated carrier reference signal accordingly, even in the presence of Doppler or ionospheric distortion. The autocorrelators in each channel form a delay lock loop (DLL) which correlates the digital samples of the composite signal with locally generated PRN code values to produce a plurality of (early, late), or (punctual, early-minus-late) correlation signals. Thus, during an initial acquisition mode, the delay spacing is relatively wide, on the order of approximately one PRN code chip time. However, once PRN code synchronism has been achieved, the code delay spacing is narrowed, to a fraction of a PRN code chip time. There are several advantages to this arrangement, especially in environments wherein multipath distortion in the received composite signal is of the same order of magnitude as a PRN code chip time.

    摘要翻译： 用于由抽样电路，多载波和码同步电路以及多个数字自相关器组成的伪随机噪声（PRN）编码信号的接收机。 采样电路将接收到的复合信号的数字样本提供给几个接收机通道电路中的每一个。 同步电路优选地是非相干的，即在它们跟踪接收信号中的任何相移并相应地调整本地产生的载波参考信号的频率和相位的意义上，即使在存在多普勒或电离层失真的情况下也是如此。 每个通道中的自相关器形成延迟锁定环（DLL），其将复合信号的数字样本与本地生成的PRN码值相关联，以产生多个（早，晚）或（准时，早 - 减 - 晚）相关 信号。 因此，在初始采集模式期间，延迟间隔相对较宽，大约为一个PRN码片时间。 然而，一旦实现了PRN代码同步，则代码延迟间隔变窄，达到PRN码片片时间的一小部分。 这种布置有几个优点，特别是在接收到的复合信号中的多径失真与PRN码片时间具有相同数量级的环境中。

    Spatial and time multiplexing of multi-band signals
    4.
    发明申请
    Spatial and time multiplexing of multi-band signals 有权
    多频带信号的空间和时间复用

    公开(公告)号：US20060227905A1

    公开(公告)日：2006-10-12

    申请号：US11104058

    申请日：2005-04-12

    申请人： Waldemar Kunysz ,  Patrick Fenton

    发明人： Waldemar Kunysz ,  Patrick Fenton

    IPC分类号： H04L27/08 ,  H04L1/02

    CPC分类号： H04B7/0822 ,  G01S19/32 ,  G01S19/33 ,  G01S19/36 ,  H04B7/086 ,  H04L5/06

    摘要： A multi-band receiver for use with satellite ranging systems is provided. The receiver has a simplified architecture in which input signals of various frequencies are multiplexed together to form a single composite analog signal. In accordance with one embodiment of the invention, this composite signal only requires a single RF circuit for down conversion to an intermediate frequency. The composite, downconverted signal is sampled, and the digitized samples are demultiplexed to form digital counterparts of the original signals from each frequency band. An embodiment for use with elements of a phased array antenna is also provided.

    摘要翻译： 提供了一种用于卫星测距系统的多频段接收机。 接收机具有简化的结构，其中各种频率的输入信号被多路复用在一起以形成单个复合模拟信号。 根据本发明的一个实施例，该复合信号仅需要单个RF电路来向下转换成中频。 复合下变频信号被采样，数字化样本被解复用以形成来自每个频带的原始信号的数字对应物。 还提供了一种与相控阵天线的元件一起使用的实施例。

    SEISMIC MEASURING SYSTEM INCLUDING GPS RECEIVERS
    7.
    发明申请
    SEISMIC MEASURING SYSTEM INCLUDING GPS RECEIVERS 有权
    包括GPS接收机在内的地震测量系统

    公开(公告)号：US20070268176A1

    公开(公告)日：2007-11-22

    申请号：US11835520

    申请日：2007-08-08

    申请人： Patrick Fenton

    发明人： Patrick Fenton

    IPC分类号： G01S1/02

    CPC分类号： G01V3/28 ,  G01S19/05 ,  G01S19/44 ,  G01V1/003 ,  G01V1/16 ,  G01V1/22 ,  G01V1/26

    摘要： A system for determining positions of fixed-position GPS receives that have restricted views of the sky includes a data recording and control center, and one or more base GPS receivers with associated antennas with a substantially unrestricted views of the sky. The system batch processes range information provided by the fixed-position GPS receivers over an extended period of time; determining which of the range data from the fixed-position receivers are valid, and using the valid range data to determine position. In this way, the precise positions of the respective fixed-position slave GPS receivers can be calculated, even if the fixed-position GPS receivers are able to observe and collect data from sets of two or more satellites for only three or four relatively short time intervals at various sky positions during the extended period.

    摘要翻译： 用于确定具有限制的天空视图的固定位置GPS接收的位置的系统包括数据记录和控制中心以及一个或多个基本GPS接收机，其具有天空的基本无限制视图。 系统批量处理固定位置GPS接收机在延长的时间段内提供的范围信息; 确定来自固定位置接收器的范围数据中的哪一个是有效的，并且使用有效范围数据来确定位置。 以这种方式，即使固定位置GPS接收机能够观察和收集来自两个或更多个卫星的集合的数据，只有三个或四个相对短的时间，也可以计算各个固定位置从属GPS接收机的精确位置 在长时间内处于不同天空位置的间隔。

    Apparatus for and method of determining quadrature code timing from pulse-shape measurements made using an in-phase code
    8.
    发明申请
    Apparatus for and method of determining quadrature code timing from pulse-shape measurements made using an in-phase code 有权
    用于使用同相代码从脉冲形状测量确定正交码定时的装置和方法

    公开(公告)号：US20070058700A1

    公开(公告)日：2007-03-15

    申请号：US11226174

    申请日：2005-09-14

    申请人： Patrick Fenton

    发明人： Patrick Fenton

    IPC分类号： H04B1/00

    CPC分类号： G01S19/30 ,  H04B1/7075 ,  H04B2201/70715

    摘要： A receiver employs a pre-correlation filter to determine the precise timing of, for example, a PRN code on the quadrature channel of a received signal, using an image of the average chip shape that the filter forms for a PRN code on the in-phase channel. The image is expressed as a time series of complex power measurements along the length of a single chip. The averaging process retains the detail of the composite in-phase signal (direct plus multipath signals) while reducing the level of signal noise by an amount proportional to the length of the averaging process. An analysis of the image reveals that there is, in the in-phase channel signal that is averaged, information from the quadrature channel signal. The quadrature channel signal information produces, in the image of the average chip shape of the in-phase channel PRN code, a “wiggle” that corresponds to the timing of the chips of the quadrature channel PRN code. The receiver detects the chip edges of the quadrature PRN code directly from an analysis of the high frequency phase modulations of the complex vector of samples that represents the average chip shape. Using GPS signals, the receiver detects the P-code transitions by synchronizing to the 10.23 MHz phase modulations in the complex vector of samples that represent the averaged chip shape. The receiver uses the detected P-code transitions and, more particularly, the P-code transitions that are closest to the C/A code transitions, to produce P-code phase information that the receiver uses pseudorange calculations to remove biases associated with timing differences between the transmission of the in-phase and quadrature PRN codes.

    摘要翻译： 接收机使用预相关滤波器来确定例如接收信号的正交信道上的PRN码的精确定时，使用滤波器对在内部信道上的PRN码形成的平均码片形状的图像， 相位通道。 图像表示为沿着单个芯片的长度的复杂功率测量的时间序列。 平均过程保留复合同相信号（直接加多径信号）的细节，同时将信号噪声的水平降低与平均过程的长度成比例的量。 对图像的分析显示，在平均的同相信道信号中存在来自正交信道信号的信息。 正交信道信号信息在同相信道PRN码的平均码片形状的图像中产生对应于正交信道PRN码的码片的定时的“摆动”。 接收机直接从代表平均芯片形状的样本的复矢量的高频相位调制的分析中检测正交PRN码的码片边缘。 使用GPS信号，接收机通过与表示平均芯片形状的样本的复矢量中的10.23MHz相位调制同步来检测P码转换。 接收机使用检测到的P码转换，更具体地，最接近于C / A码转换的P码转换，以产生接收机使用伪距计算去除与定时差相关的偏差的P码相位信息 在同相和正交PRN码的传输之间。

    ALTBOC RECEIVER
    9.
    发明申请
    ALTBOC RECEIVER 有权
    ALTBOC接收器

    公开(公告)号：US20080094280A1

    公开(公告)日：2008-04-24

    申请号：US11756744

    申请日：2007-06-01

    申请人： Patrick Fenton

    发明人： Patrick Fenton

    IPC分类号： H04L17/16 ,  G01S5/00 ,  G01C21/00

    CPC分类号： H04L27/2032 ,  G01S19/02 ,  G01S19/30 ,  H04J13/102

    摘要： An AltBoc receiver accumulates power measurements over code chip ranges that are associated with time slots that span the code chips. The receiver combines a received signal with code and carrier phase offsets that correspond to the time slots to produce the power measurements, with the code phase offsets determined from compressed signals representing one or a combination of the codes in the AltBoc signal. The receiver recovers navigation data from the data channels of the received signal and combines the recovered data with the corresponding locally generated PRN codes to produce a locally generated 4 code signal that is then used track the full 8PSK AltBoc received signal. The receiver rotates and shifts the phase of the received signal in order to line up the subcarrier splitting code zero crossings. The pulse shape of this rotated and shifted signal is measured. The resulting sharp edges of the recovered subcarrier are used to control the code phase of the receiver.

    摘要翻译： AltBoc接收器在与跨越码片的时隙相关联的码片范围内累积功率测量。 接收机将接收到的信号与对应于时隙的编码和载波相位偏移组合以产生功率测量，其中代码相位偏移由表示AltBoc信号中的一个或代码组合的压缩信号确定。 接收机从接收信号的数据信道中恢复导航数据，并将恢复的数据与相应的本地生成的PRN码组合，以产生本地产生的4码信号，然后使用该信号跟踪完整的8PSK AltBoc接收信号。 接收机旋转并移位接收信号的相位，以便对准子载波分割码零交叉。 测量该旋转和移位信号的脉冲形状。 所得到的副载波的尖锐边缘用于控制接收机的码相位。

    ASSISTED SEISMIC MEASURING SYSTEM INCLUDING GPS RECEIVERS
    10.
    发明申请
    ASSISTED SEISMIC MEASURING SYSTEM INCLUDING GPS RECEIVERS 审中-公开
    辅助地震测量系统，包括GPS接收机

    公开(公告)号：US20070213936A1

    公开(公告)日：2007-09-13

    申请号：US11537719

    申请日：2006-10-02

    申请人： Patrick Fenton ,  Norman Heidebrecht

    发明人： Patrick Fenton ,  Norman Heidebrecht

    IPC分类号： G01V1/00

    CPC分类号： G01V3/28 ,  G01S19/05 ,  G01S19/44 ,  G01V1/003 ,  G01V1/16 ,  G01V1/22 ,  G01V1/26

    摘要： A system for analyzing three-dimensional seismic data includes a plurality of digitizer units, each with a configuration of geophones, a data recording and control center, a base GPS receiver with an associated antenna with a substantially unrestricted view of the sky and at the respective digitizer units low-power slave GPS receivers that acquire and track GPS satellite signals using tracking assistance information provided by the base GPS receiver. The slave GPS receivers use the tracking assistance information to acquire and track GPS satellite signals that may be relatively weak at the receivers, due to conditions at the site, such as foliage canopies and so forth. The system processes range information provided by the slave GPS receivers over an extended period of time. In this way, the precise positions of the respective slave GPS receivers, and thus, the digitizer units, can be calculated, even if the slave GPS receivers are able to observe and collect data from sets of two or more satellites for only three or four relatively short time intervals at various sky positions during the extended period. The slave GPS receivers then locally produce for the digitizer units timing signals that are based on the GPS codes and synchronized across the system. If a given slave GPS receiver cannot, at a given time, track any GPS satellite signals, a nearby slave GPS receiver supplies the timing information required for the geophone data gathering operations.

    摘要翻译： 用于分析三维地震数据的系统包括多个数字化仪单元，每个数字化仪单元具有地震检波器的配置，数据记录和控制中心，具有相关天线的基本GPS接收器，其具有天空的基本上无限制的视图， 数字转换器单元低功率从站GPS接收机，采用GPS卫星信号采集和跟踪GPS接收机提供的跟踪辅助信息。 从属GPS接收机使用跟踪辅助信息来获取和跟踪在接收机处可能相对较弱的GPS卫星信号，这是由于现场的状况，例如叶面檐篷等等。 该系统在较长时间内处理由从属GPS接收机提供的范围信息。 以这种方式，即使从属GPS接收机能够观察和收集来自两个或更多个卫星的数据的数据只能三或四个，也可以计算各个从属GPS接收机以及因此数字转换器单元的精确位置 在长时间内在各种天空位置的相对较短的时间间隔。 然后，从属GPS接收机本地产生用于数字转换器单元的基于GPS代码并基于系统同步的定时信号。 如果给定的从属GPS接收机在给定时间不能跟踪任何GPS卫星信号，则附近的从属GPS接收器提供地震检波器数据采集操作所需的定时信息。