Patents by Inventor Victor A. Prasolov
Victor A. Prasolov has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240085570Abstract: Digital anti-jam apparatus includes a CPU; N spectrum analysis and band rejection (SABR) modules, each receiving a digital quadrature signal input, outputting a spectral data output, and outputting a quadrature output with interference band rejected; the CPU first places the SABR modules into a spectral analysis (SA) mode, and upon detection of interference, places the SABR modules into a band rejection (BR) mode while the interference continues; N N-to-1 multiplexers, whose quadrature outputs are connected to corresponding SABR modules, wherein the CPU controls whether to connect an input of each multiplexer either to the quadrature signal input or to the quadrature band-reject output of any other SABR module; a (N+1)-to-1 multiplexer, connected to the quadrature signal input or to the quadrature output of any SABR module; and a frequency conversion module, that receives output of the (N+1)-to-1 multiplexer and shifts a spectrum of the digital quadrature signal input.Type: ApplicationFiled: August 13, 2019Publication date: March 14, 2024Inventors: ANDREY V. VEITSEL, PAVEL V. KALMYKOV, IGOR A. ORLOVSKY, VICTOR A. PRASOLOV, EVGENY N. SIDOROV
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Patent number: 9759753Abstract: 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.Type: GrantFiled: November 18, 2014Date of Patent: September 12, 2017Assignee: Topcon Positioning Systems, Inc.Inventors: Andrey V. Veitsel, Victor A. Prasolov, Dmitry D. Murzinov, Igor A. Orlovsky
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Patent number: 9729308Abstract: 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.Type: GrantFiled: December 20, 2016Date of Patent: August 8, 2017Assignee: Topcon Positioning Systems, Inc.Inventors: Mark I. Zhodzishsky, Victor A. Prasolov, Dmitry M. Zhodzishsky
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Publication number: 20170104578Abstract: 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.Type: ApplicationFiled: December 20, 2016Publication date: April 13, 2017Inventors: Mark I. Zhodzishsky, Victor A. Prasolov, Dmitry M. Zhodzishsky
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Publication number: 20170104579Abstract: 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.Type: ApplicationFiled: December 20, 2016Publication date: April 13, 2017Inventors: Mark I. Zhodzishsky, Victor A. Prasolov, Dmitry M. Zhodzishsky
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Patent number: 9584308Abstract: 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.Type: GrantFiled: January 26, 2015Date of Patent: February 28, 2017Assignee: Topcon Positioning Systems, Inc.Inventors: Mark I. Zhodzishsky, Victor A. Prasolov, Dmitry M. Zhodzishsky
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Publication number: 20160341774Abstract: 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.Type: ApplicationFiled: November 18, 2014Publication date: November 24, 2016Inventors: Andrey V. Veitsel, Victor A. Prasolov, Dmitry D. Murzinov, Igor A. Orlovsky
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Publication number: 20160315759Abstract: 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.Type: ApplicationFiled: January 26, 2015Publication date: October 27, 2016Inventors: Mark I. Zhodzishsky, Victor A. Prasolov, Dmitry M. Zhodzishsky
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Patent number: 9391655Abstract: 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.Type: GrantFiled: January 12, 2016Date of Patent: July 12, 2016Assignee: Topcon Positioning Systems, Inc.Inventors: Andrey V. Veitsel, Victor A. Prasolov, Dmitry D. Murzinov
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Patent number: 9350414Abstract: 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.Type: GrantFiled: October 28, 2013Date of Patent: May 24, 2016Assignee: Topcon Positioning Systems, Inc.Inventors: Andrey V. Veitsel, Victor A. Prasolov, Dmitry D. Murzinov
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Publication number: 20160126991Abstract: 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.Type: ApplicationFiled: January 12, 2016Publication date: May 5, 2016Inventors: Andrey V. Veitsel, Victor A. Prasolov, Dmitry D. Murzinov
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Publication number: 20150244416Abstract: 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.Type: ApplicationFiled: October 28, 2013Publication date: August 27, 2015Inventors: Andrey V. Veitsel, Victor A. Prasolov, Dmitry D. Murzinov
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Patent number: 9052388Abstract: 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.Type: GrantFiled: July 8, 2014Date of Patent: June 9, 2015Assignee: Topcon Positioning Systems, Inc.Inventors: Vladimir V. Veitsel, Dmitry P. Nikitin, Andrey V. Plenkin, Andrey V. Veitsel, Mark I. Zhodzishsky, Victor A. Prasolov
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Patent number: 9020088Abstract: The present invention proposes a digital system and method of measuring (estimating) non-energy parameters of the signal (phase, frequency and frequency rate) received in additive mixture with Gaussian noise. The first embodiment of the measuring system consists of a PLL system tracking variable signal frequency, a block of NCO full phase computation (OFPC), a block of signal phase primary estimation (SPPE) and a first type adaptive filter filtering the signal from the output of SPPE. The second embodiment of the invention has no block SPPE, and NCO full phase is fed to the input of a second type adaptive filter. The present invention can be used in receivers of various navigation systems, such as GPS, GLONASS and GALILEO, which provide precise measurements of signal phase at different rates of frequency change, as well as systems using digital PLLs for speed measurements.Type: GrantFiled: September 12, 2012Date of Patent: April 28, 2015Assignee: Topcon Positioning Systems, Inc.Inventors: Mark I. Zhodzishsky, Victor A. Prasolov, Alexey S. Lebedinsky, Daniel S. Milyutin
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Publication number: 20150097724Abstract: 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.Type: ApplicationFiled: July 8, 2014Publication date: April 9, 2015Inventors: Vladimir V. Veitsel, Dmitry P. Nikitin, Andrey V. Plenkin, Andrey V. Veitsel, Mark I. Zhodzishsky, Victor A. Prasolov
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Patent number: 8982937Abstract: Navigation satellite receivers have a large number of channels, where phase discriminators and loop filter of a PLL operate in phase with data bits and control of numerically controlled oscillator (NCO) carried out simultaneously on all channels. Since symbol boundaries for different satellites do not match, there is a variable time delay between the generation of control signals and NCO control time. This delay may be measured by counting a number of samples in the delay interval. A proposed system measures non-energy parameters of the BPSK-signal carrier received in additive mixture with noise when a digital loop filter of PLL controls NCO with a constant or changing in time delay. A control unit controls bandwidth and a LF order by changing transfer coefficients based on analyzing estimated signal parameters and phase tracking error at a PD output.Type: GrantFiled: October 30, 2014Date of Patent: March 17, 2015Assignee: Topcon Positioning Systems, Inc.Inventors: Mark I. Zhodzishsky, Victor A. Prasolov, Vladimir V. Veitsel, Dmitry M. Zhodzishsky, Alexey S. Lebedinsky, Ilya V. Ivantsov
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Publication number: 20150063432Abstract: Navigation satellite receivers have a large number of channels, where phase discriminators and loop filter of a PLL operate in phase with data bits and control of numerically controlled oscillator (NCO) carried out simultaneously on all channels. Since symbol boundaries for different satellites do not match, there is a variable time delay between the generation of control signals and NCO control time. This delay may be measured by counting a number of samples in the delay interval. A proposed system measures non-energy parameters of the BPSK-signal carrier received in additive mixture with noise when a digital loop filter of PLL controls NCO with a constant or changing in time delay. A control unit controls bandwidth and a LF order by changing transfer coefficients based on analyzing estimated signal parameters and phase tracking error at a PD output.Type: ApplicationFiled: October 30, 2014Publication date: March 5, 2015Inventors: Mark I. Zhodzishsky, Victor A. Prasolov, Vladimir V. Veitsel, Dmitry M. Zhodzishsky, ALEXEY S. LEBEDINSKY, ILYA V. IVANTSOV
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Patent number: 8891687Abstract: Navigation satellite receivers have a large number of channels, where phase discriminators and loop filter of a PLL operate in phase, with data bits and control of numerically controlled oscillator (NCO) carried out simultaneously on all channels. Since symbol boundaries for different satellites do not match, there is a variable time delay between the generation of control signals and NCO control time. This delay may be measured by counting a number of samples in the delay interval. A proposed system measures non-energy parameters of the BPSK signal carrier received in additive mixture with noise when a digital loop filter of PLL controls NCO with a constant or changing in time delay. A control unit controls bandwidth and a LF order by changing transfer coefficients based on analyzing estimated signal parameters and phase tracking error at a PD output.Type: GrantFiled: June 26, 2013Date of Patent: November 18, 2014Assignee: Topcon Positioning Systems, Inc.Inventors: Mark I. Zhodzishsky, Victor A. Prasolov, Vladimir V. Veitsel, Dmitry M. Zhodzishsky, Alexey S. Lebedinsky, Ilya V. Ivantsov
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Patent number: 8818720Abstract: 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.Type: GrantFiled: June 28, 2011Date of Patent: August 26, 2014Assignee: Topcon Positioning Systems, Inc.Inventors: Vladimir V. Veitsel, Dmitry P. Nikitin, Andrey V. Plenkin, Andrey V. Veitsel, Mark I. Zhodzishsky, Victor A. Prasolov
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Publication number: 20140072084Abstract: The present invention proposes a digital system and method of measuring (estimating) non-energy parameters of the signal (phase, frequency and frequency rate) received in additive mixture with Gaussian noise. The first embodiment of the measuring system consists of a PLL system tracking variable signal frequency, a block of NCO full phase computation (OFPC), a block of signal phase primary estimation (SPPE) and a first type adaptive filter filtering the signal from the output of SPPE. The second embodiment of the invention has no block SPPE, and NCO full phase is fed to the input of a second type adaptive filter. The present invention can be used in receivers of various navigation systems, such as GPS, GLONASS and GALILEO, which provide precise measurements of signal phase at different rates of frequency change, as well as systems using digital PLLs for speed measurements.Type: ApplicationFiled: September 12, 2012Publication date: March 13, 2014Applicant: Topcon Positioning Systems, Inc.Inventors: Mark I. Zhodzishsky, Victor A. Prasolov, Alexey S. Lebedinsky, Daniel S. Milyutin