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    Digital system for estimating signal non-energy parameters using a digital phase locked loop
    1.
    发明授权
    Digital system for estimating signal non-energy parameters using a digital phase locked loop 有权
    用于使用数字锁相环估计信号非能量参数的数字系统

    公开(公告)号：US09584308B2

    公开(公告)日：2017-02-28

    申请号：US14654905

    申请日：2015-01-26

    Applicant: Topcon Positioning Systems, Inc.

    Inventor： Mark I. Zhodzishsky ,  Victor A. Prasolov ,  Dmitry M. Zhodzishsky

    IPC: H04L7/033 ,  H03L7/08 ,  H03L7/085

    CPC classification number: H04L7/0331 ,  H03L7/08 ,  H03L7/085 ,  H04L7/0332

    Abstract: A digital system of measuring parameters of the signal (phase, frequency and frequency derivative) received in additive mixture with Gaussian noise. The system is based on the use of variables of a PLL for calculating preliminary estimates of parameters and calculating the corrections for these estimates when there is a spurt frequency caused by a receiver motion with a jerk. A jerk is determined if the low pass filtered signal of the discriminator exceeds a certain threshold. The jerk-correction decreases the dynamic errors. Another embodiment includes a tracking filter for obtaining preliminary estimates of parameters to reduce the fluctuation errors. Estimates are taken from the tracking filter when there is no jerk and from the block of jerk-corrections when there is a jerk.

    Abstract translation: 一种数字系统，用于测量加性混合中高斯噪声信号（相位，频率和频率导数）的参数。 该系统基于使用PLL的变量来计算参数的初步估计，并且当由于具有突跳的接收器运动引起的突发频率时，计算这些估计的校正。 如果鉴别器的低通滤波信号超过一定阈值，则确定抖动。 抖动校正减少动态错误。 另一个实施例包括用于获得参数的初步估计以减少波动误差的跟踪滤波器。 当没有冲击时，从跟踪过滤器获取估计值，并且当存在冲击时从抖动修正块获取。

    METHOD AND APPARATUS OF GNSS RECEIVER HEADING DETERMINATION
    2.
    发明申请
    METHOD AND APPARATUS OF GNSS RECEIVER HEADING DETERMINATION 有权
    GNSS接收机测头的方法与装置

    公开(公告)号：US20150097724A1

    公开(公告)日：2015-04-09

    申请号：US14325446

    申请日：2014-07-08

    Applicant: Topcon Positioning Systems, Inc.

    Inventor： Vladimir V. Veitsel ,  Dmitry P. Nikitin ,  Andrey V. Plenkin ,  Andrey V. Veitsel ,  Mark I. Zhodzishsky ,  Victor A. Prasolov

    IPC: G01S19/13

    CPC classification number: G01S19/13 ,  G01S19/52

    Abstract: The present invention relates to processing information generated by GNSS receivers received signals such as GPS, GLONASS, etc. GNSS receivers can determine their position in space. The receivers are capable of determining both coordinates and velocity of their spatial movement. When a receiver is used in any machine control systems, velocity vector heading (in other words, velocity vector orientation) should be determined along with velocity vector's absolute value. Angle, determining velocity vector orientation, is calculated based on velocity vector projections which are computed in navigation receivers. The accuracy of velocity vector orientation calculated based on velocity vector projections strongly enough depends on velocity vector's absolute value. To enhance the accuracy, a method of smoothing primary estimates of velocity vector orientation angles using a modified Kalman filter has been proposed. The bandwidth of this filter is varied depending on current estimates of velocity vector's absolute value which were calculated based on the same velocity vector projections.

    Abstract translation: 本发明涉及由GNSS接收机生成的接收信号（例如GPS，GLONASS等）的处理信息。GNSS接收机可以确定它们在空间中的位置。 接收机能够确定其空间运动的坐标和速度。 当接收机用于任何机器控制系统时，速度矢量标题（换句话说，速度矢量方向）应与速度矢量的绝对值一起确定。 基于在导航接收机中计算的速度矢量投影计算角度，确定速度矢量方向。 基于速度矢量投影计算出的速度矢量方向的精确度足够高取决于速度矢量的绝对值。 为了提高准确性，已经提出了使用改进的卡尔曼滤波器来平滑速度矢量定向角的初级估计的方法。 该滤波器的带宽根据基于相同速度矢量投影计算的速度矢量绝对值的当前估计而变化。

    Digital filter for narrowband interference rejection
    7.
    发明授权
    Digital filter for narrowband interference rejection 有权
    用于窄带干扰抑制的数字滤波器

    公开(公告)号：US09391655B2

    公开(公告)日：2016-07-12

    申请号：US14993130

    申请日：2016-01-12

    Applicant: Topcon Positioning Systems, Inc.

    Inventor： Andrey V. Veitsel ,  Victor A. Prasolov ,  Dmitry D. Murzinov

    IPC: H04B1/00 ,  H04B1/10

    CPC classification number: H04B1/1036 ,  H04B1/10 ,  H04B1/109 ,  H04B1/7101 ,  H04B2001/1063 ,  H04B2201/709709

    Abstract: A digital filter for narrowband interference rejection, including modules of narrowband interference rejection connected in series, each of which includes the following elements connected in series: a block of successive vector rotation based on the CORDIC vector rotation algorithm for integers, a block of reduction of the length of the rotated vector to maintain the same number of bits for digital signal representation, a block of high-pass filters for orthogonal components of the reduced vector in order to remove the interference from zero frequency region. The filter can be implemented without multiplication.

    Abstract translation: 一种用于窄带干扰抑制的数字滤波器，包括串联连接的窄带干扰抑制模块，每个模块包括串联连接的以下元件：基于用于整数的CORDIC矢量旋转算法的连续矢量旋转块， 旋转矢量的长度以维持数字信号表示相同数量的比特，用于减少向量的正交分量的高通滤波器块，以便消除来自零频率区域的干扰。 滤波器可以无乘法实现。

    Digital sweep type spectrum analyzer with up/down frequency conversion
    9.
    发明授权
    Digital sweep type spectrum analyzer with up/down frequency conversion 有权

    公开(公告)号：US09759753B2

    公开(公告)日：2017-09-12

    申请号：US14654881

    申请日：2014-11-18

    Applicant: Topcon Positioning Systems, Inc.

    Inventor： Andrey V. Veitsel ,  Victor A. Prasolov ,  Dmitry D. Murzinov ,  Igor A. Orlovsky

    IPC: G01R23/16 ,  G01R23/173

    CPC classification number: G01R23/16 ,  G01R23/173

    Abstract: System for digital sweep type spectrum analysis with up/down frequency provides measurements of frequency spectrum of complex analog baseband input signal. The signal is quantized into three levels with fs based on the bandwidth of the input signal. Four multiplexers, a first block of registers and a block of adders perform operations equivalent to complex multiplication of the quadrature components. Two complex signals with up and down shifted spectrum are produced by the adders. The quadrature components are inputted to the accumulators with reset, which act as low-pass filters and accumulate several samples at a constant frequency fLO of the local oscillator. Levels of two accumulated complex samples are estimates of input signal spectrum in two frequency points +fLO and −fLO. A sweep controller changes a frequency of the local oscillator from zero up to fs/2. Estimates of the input signal spectrum are generated sequentially in range −fs/2 to +fs/2.

    Method and apparatus of GNSS receiver heading determination
    10.
    发明授权
    Method and apparatus of GNSS receiver heading determination 有权
    GNSS接收机航向确定方法和装置

    公开(公告)号：US09052388B2

    公开(公告)日：2015-06-09

    申请号：US14325446

    申请日：2014-07-08

    Applicant: Topcon Positioning Systems, Inc.

    Inventor： Vladimir V. Veitsel ,  Dmitry P. Nikitin ,  Andrey V. Plenkin ,  Andrey V. Veitsel ,  Mark I. Zhodzishsky ,  Victor A. Prasolov

    IPC: G01S19/13

    CPC classification number: G01S19/13 ,  G01S19/52

    Abstract: The present invention relates to processing information generated by GNSS receivers received signals such as GPS, GLONASS, etc. GNSS receivers can determine their position in space. The receivers are capable of determining both coordinates and velocity of their spatial movement. When a receiver is used in any machine control systems, velocity vector heading (in other words, velocity vector orientation) should be determined along with velocity vector's absolute value. Angle, determining velocity vector orientation, is calculated based on velocity vector projections which are computed in navigation receivers. The accuracy of velocity vector orientation calculated based on velocity vector projections strongly enough depends on velocity vector's absolute value. To enhance the accuracy, a method of smoothing primary estimates of velocity vector orientation angles using a modified Kalman filter has been proposed. The bandwidth of this filter is varied depending on current estimates of velocity vector's absolute value which were calculated based on the same velocity vector projections.

    Abstract translation: 本发明涉及由GNSS接收机生成的接收信号（例如GPS，GLONASS等）的处理信息。GNSS接收机可以确定它们在空间中的位置。 接收机能够确定其空间运动的坐标和速度。 当接收机用于任何机器控制系统时，速度矢量标题（换句话说，速度矢量方向）应与速度矢量的绝对值一起确定。 基于在导航接收机中计算的速度矢量投影计算角度，确定速度矢量方向。 基于速度矢量投影计算出的速度矢量方向的精确度足够高取决于速度矢量的绝对值。 为了提高准确性，已经提出了使用改进的卡尔曼滤波器来平滑速度矢量定向角的初级估计的方法。 该滤波器的带宽根据基于相同速度矢量投影计算的速度矢量绝对值的当前估计而变化。

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