Patents by Inventor Paul W. Dent

Paul W. Dent 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).

  • Publication number: 20200150256
    Abstract: A chip-implementation of a millimeter wave MIMO radar comprises transmitters for transmitting short bursts of digitally modulated radar carrier signals and receivers for receiving delayed echoes of those signals. Various signal formats defined by the number of bits per transmit burst, the transmit burst duration, the receive period duration, the bitrate, the number of range bins, and the number of bursts per scan, facilitate the choice of modulating bit patterns such that when correlating for target echoes over an entire scan, the correlation codes for different ranges and different transmitters are mutually orthogonal or nearly so. In the event of imperfect orthogonality, simple orthogonalization schemes are revealed, such as subtraction of strong already-detected target signals for better detecting weaker signals or moving targets that are rendered non-orthogonal by their Doppler shift.
    Type: Application
    Filed: November 5, 2019
    Publication date: May 14, 2020
    Inventors: Paul W. Dent, Curtis Davis, Murtaza Ali
  • Publication number: 20200136385
    Abstract: A smart load center panel (10) accepts two hot legs from each of two power sources, and selectively connects each of a plurality of breakers to one of the two power sources under processor control. A dielectric chassis (12) provides structural support and electrical isolation for a plurality of individual circuit boards (28), each including a pair of breaker stabs (26) and a relay (24) operative to selectively connect each breaker stab (26) to a different power source. A bus bar assembly (20) comprises two bus bars for the hot legs of each of two power sources, and insulates the bus bars from each other and from inadvertent contact. A master printed circuit board (40) comprises slits (43, 45) defining the individual circuit board (28) except at the edges. After mounting and soldering, the edges are cut away, yielding a plurality of individual circuit boards (28). Neutral and ground bus bars (46, 52) are mounted to the side of the panel housing (12), behind a flange of a front opening.
    Type: Application
    Filed: September 12, 2017
    Publication date: April 30, 2020
    Inventors: Curtis W. Thornton, Paul Wilkinson Dent
  • Patent number: 10551482
    Abstract: A radar system is described that comprises a transmitter and a receiver. The transmitter transmits radio signals. The receiver receives interfering signals due to local signal coupling of transmitted signals. The local signal coupling comprises at least one interfering path or mechanism. The receiver is configured to output a replica of each of the interfering signals. Each replica is configured to replicate a particular interfering signal received. The receiver is configured to combine into a signal path a replica of an interfering signal to subtract the interfering signal from the signal path. The receiver receives the transmitted radio signals transmitted by the transmitter and reflected from objects in an environment without saturating the signal path due to the subtraction of the interfering signal from the signal path.
    Type: Grant
    Filed: May 31, 2018
    Date of Patent: February 4, 2020
    Assignee: Uhnder, Inc.
    Inventors: Aria Eshraghi, Jean P. Bordes, Curtis Davis, Raghunath K. Rao, Murtaza Ali, Paul W. Dent
  • Publication number: 20190271776
    Abstract: A radar system has different modes of operation. In a method for operating the radar system, at least one of one or more transmitters are configured to transmit modulated continuous-wave radio signals, while at least one of one or more receivers are configured to receive radio signals. The received radio signals include the transmitted radio signals transmitted by the one or more transmitters and reflected from objects in the environment. The method further includes selectively modifying an operational parameter of at least one of the transmitters or at least one of the receivers. The selected operational parameter is modified to meet changing operational requirements of the radar sensing system.
    Type: Application
    Filed: April 15, 2019
    Publication date: September 5, 2019
    Inventors: Curtis Davis, Monier Maher, Jean P. Bordes, Manju Hegde, Otto A. Schmid, Raghunath K. Rao, Marius Goldenberg, Aria Eshraghi, Vito Giannini, David S. Trager, Nikhilesh Bhagat, Srikanth Gollapudi, Sundar Govindarajan, Steve Borho, Jonathan Preussner, Paul W. Dent, Paul Bassett, Stephen W. Alland, Fred Harris, Wayne E. Stark, Murtaza Ali
  • Patent number: 10261179
    Abstract: A radar system has different modes of operation. In one mode, the radar operates as a single-input, multiple output (SIMO) radar system utilizing one transmitted signal from one antenna at a time. Codes with known excellent autocorrelation properties are utilized in this mode. At each receiver the response after correlating with various possible transmitted signals is measured in order to estimate the interference that each transmitter will represent at each receiver. The estimated effect of the interference from one transmitter to a receiver that correlates with a different code is used to mitigate the interference. In another mode, the radar operates as a multi-input, multiple-output (MIMO) radar system utilizing all the antennas at a time. Interference cancellation of the nonideal cross-correlation sidelobes when transmitting in the MIMO mode are employed to remove ghost targets due to unwanted sidelobes.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: April 16, 2019
    Assignee: Uhnder, Inc.
    Inventors: Curtis Davis, Monier Maher, Jean P. Bordes, Manju Hegde, Otto A. Schmid, Raghunath K. Rao, Marius Goldenberg, Aria Eshraghi, Vito Giannini, David S. Trager, Nikhilesh Bhagat, Srikanth Gollapudi, Sundar Govindarajan, Steve Borho, Jonathan Preussner, Paul W. Dent, Paul Bassett, Stephen W. Alland, Fred Harris, Wayne E. Stark, Murtaza Ali
  • Publication number: 20190094353
    Abstract: A radar system processes signals in a flexible, adaptive manner to determine range, Doppler (velocity) and angle of objects in an environment. The radar system processes the received signal to achieve different objectives depending on one or more of a selected range resolution, a selected velocity resolution, and a selected angle of arrival resolution, as defined by memory requirements and processing requirements. The system allows improved resolution of range, Doppler and/or angle depending on the memory requirements and processing requirements. The system also adapts to changing environmental conditions including interfering radio signals.
    Type: Application
    Filed: December 3, 2018
    Publication date: March 28, 2019
    Inventors: Curtis Davis, Monier Maher, Jean P. Bordes, Manju Hegde, Otto A. Schmid, Raghunath K. Rao, Marius Goldenberg, Aria Eshraghi, Vito Giannini, David S. Trager, Nikhilesh Bhagat, Srikanth Gollapudi, Sundar Govindarajan, Steve Borho, Jonathan Preussner, Paul W. Dent, Paul Bassett, Stephen W. Alland, Fred Harris, Wayne E. Stark, Murtaza Ali
  • Patent number: 10145954
    Abstract: A radar system processes signals in a flexible, adaptive manner to determine range, Doppler (velocity) and angle of objects in an environment. The radar system processes the received signal to achieve different objectives depending on one or more of a selected range resolution, a selected velocity resolution, and a selected angle of arrival resolution, as defined by memory requirements and processing requirements. The system allows improved resolution of range, Doppler and/or angle depending on the memory requirements and processing requirements.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: December 4, 2018
    Assignee: Uhnder, Inc.
    Inventors: Curtis Davis, Monier Maher, Jean P. Bordes, Manju Hegde, Otto A. Schmid, Raghunath K. Rao, Marius Goldenberg, Aria Eshraghi, Vito Giannini, David S. Trager, Nikhilesh Bhagat, Srikanth Gollapudi, Sundar Govindarajan, Steve Borho, Jonathan Preussner, Paul W. Dent, Paul Bassett, Stephen W. Alland, Fred Harris, Wayne E. Stark, Murtaza Ali
  • Publication number: 20180329027
    Abstract: A radar system is described that comprises a transmitter and a receiver. The transmitter transmits radio signals. The receiver receives interfering signals due to local signal coupling of transmitted signals. The local signal coupling comprises at least one interfering path or mechanism. The receiver is configured to output a replica of each of the interfering signals. Each replica is configured to replicate a particular interfering signal received. The receiver is configured to combine into a signal path a replica of an interfering signal to subtract the interfering signal from the signal path. The receiver receives the transmitted radio signals transmitted by the transmitter and reflected from objects in an environment without saturating the signal path due to the subtraction of the interfering signal from the signal path.
    Type: Application
    Filed: May 31, 2018
    Publication date: November 15, 2018
    Inventors: Aria Eshraghi, Jean P. Bordes, Curtis Davis, Raghunath K. Rao, Murtaza Ali, Paul W. Dent
  • Publication number: 20180252809
    Abstract: A radar system has different modes of operation. In one mode, the radar operates as a single-input, multiple output (SIMO) radar system utilizing one transmitted signal from one antenna at a time. Codes with known excellent autocorrelation properties are utilized in this mode. At each receiver the response after correlating with various possible transmitted signals is measured in order to estimate the interference that each transmitter will represent at each receiver. The estimated effect of the interference from one transmitter to a receiver that correlates with a different code is used to mitigate the interference. In another mode, the radar operates as a multi-input, multiple-output (MIMO) radar system utilizing all the antennas at a time. Interference cancellation of the nonideal cross-correlation sidelobes when transmitting in the MIMO mode are employed to remove ghost targets due to unwanted sidelobes.
    Type: Application
    Filed: April 25, 2017
    Publication date: September 6, 2018
    Inventors: Curtis Davis, Monier Maher, Jean P. Bordes, Manju Hegde, Otto A. Schmid, Raghunath K. Rao, Marius Goldenberg, Aria Eshraghi, Vito Giannini, David S. Trager, Nikhilesh Bhagat, Srikanth Gollapudi, Sundar Govindarajan, Steve Borho, Jonathan Preussner, Paul W. Dent, Paul Bassett, Stephen W. Alland, Fred Harris, Wayne E. Stark, Murtaza Ali
  • Patent number: 9989627
    Abstract: A radar system is described that comprises a transmitter, a receiver, a spillover cancellation unit, and a combiner. The transmitter transmits radio signals. The receiver receives interfering signals due to local signal coupling of transmitted signals. The local signal coupling comprises at least one interfering path or mechanism. The spillover cancellation unit is configured to output a replica of each of the interfering signals. Each replica is configured to replicate a particular interfering signal received through a particular interfering path or mechanism. The combiner is configured to combine into a signal path of the receiver, a replica of an interfering signal to subtract the interfering signal from the receiver's signal path. The receiver receives the transmitted radio signals reflected from objects in the environment without saturating the signal path of the receiver due to the subtraction of the interfering signal from the receiver's signal path.
    Type: Grant
    Filed: October 12, 2017
    Date of Patent: June 5, 2018
    Assignee: Uhnder, Inc.
    Inventors: Aria Eshraghi, Jean P. Bordes, Curtis Davis, Raghunath K. Rao, Murtaza Ali, Paul W. Dent
  • Publication number: 20180100918
    Abstract: A radar system processes signals in a flexible, adaptive manner to determine range, Doppler (velocity) and angle of objects in an environment. The radar system processes the received signal to achieve different objectives depending on one or more of a selected range resolution, a selected velocity resolution, and a selected angle of arrival resolution, as defined by memory requirements and processing requirements. The system allows improved resolution of range, Doppler and/or angle depending on the memory requirements and processing requirements.
    Type: Application
    Filed: December 18, 2017
    Publication date: April 12, 2018
    Inventors: Curtis Davis, Monier Maher, Jean P. Bordes, Manju Hegde, Otto A. Schmid, Raghunath K. Rao, Marius Goldenberg, Aria Eshraghi, Vito Giannini, David S. Trager, Nikhilesh Bhagat, Srikanth Gollapudi, Sundar Govindarajan, Steve Borho, Jonathan Preussner, Paul W. Dent, Paul Bassett, Stephen W. Alland, Fred Harris, Wayne E. Stark, Murtaza Ali
  • Publication number: 20180031675
    Abstract: A radar system is described that comprises a transmitter, a receiver, a spillover cancellation unit, and a combiner. The transmitter transmits radio signals. The receiver receives interfering signals due to local signal coupling of transmitted signals. The local signal coupling comprises at least one interfering path or mechanism. The spillover cancellation unit is configured to output a replica of each of the interfering signals. Each replica is configured to replicate a particular interfering signal received through a particular interfering path or mechanism. The combiner is configured to combine into a signal path of the receiver, a replica of an interfering signal to subtract the interfering signal from the receiver's signal path. The receiver receives the transmitted radio signals reflected from objects in the environment without saturating the signal path of the receiver due to the subtraction of the interfering signal from the receiver's signal path.
    Type: Application
    Filed: October 12, 2017
    Publication date: February 1, 2018
    Inventors: Aria Eshraghi, Jean P. Bordes, Curtis Davis, Raghunath K. Rao, Murtaza Ali, Paul W. Dent
  • Patent number: 9846228
    Abstract: A radar system processes signals in a flexible, adaptive manner to determine range, Doppler (velocity) and angle of objects in an environment. The radar system processes the received signal to achieve different objectives depending on the environment, the current information stored in the radar system, and/or external information provided to the radar system. The system allows improved resolution of range, Doppler and/or angle depending on the desired objective.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: December 19, 2017
    Assignee: UHNDER, INC.
    Inventors: Curtis Davis, Monier Maher, Jean P. Bordes, Manju Hegde, Otto A. Schmid, Raghunath K. Rao, Marius Goldenberg, Aria Eshraghi, Vito Giannini, David S. Trager, Nikhilesh Bhagat, Srikanth Gollapudi, Sundar Govindarajan, Steve Borho, Jonathan Preussner, Paul W. Dent, Paul Bassett, Stephen W. Alland, Fred Harris, Wayne E. Stark, Murtaza Ali
  • Publication number: 20170307729
    Abstract: A digital FMCW radar is described that simultaneously transmits and receives digitally frequency modulated signals using multiple transmitters and multiple receivers and associated antennas. Several sources of nearby spillover from transmitters to receivers that would otherwise degrade receiver performance are subtracted by a cancellation system in the analog radio frequency domain that adaptively synthesizes an analog subtraction signal based on residual spillover measured by a correlator operating in the receivers' digital signal processing domains and based on knowledge of the transmitted waveforms. The first adaptive cancellation system achieves a sufficient reduction of transmit-receive spillover to avoid receiver saturation or other non-linear effects, but is then added back in to the signal path in the digital domain after analog-to-digital conversion so that spillover cancellation can also operate in the digital signal processing domain to remove deleterious spillover components.
    Type: Application
    Filed: April 25, 2017
    Publication date: October 26, 2017
    Inventors: Aria Eshraghi, Jean P. Bordes, Curtis Davis, Raghunath K. Rao, Murtaza Ali, Paul W. Dent
  • Patent number: 9791551
    Abstract: A digital FMCW radar is described that simultaneously transmits and receives digitally frequency modulated signals using multiple transmitters and multiple receivers and associated antennas. Several sources of nearby spillover from transmitters to receivers that would otherwise degrade receiver performance are subtracted by a cancellation system in the analog radio frequency domain that adaptively synthesizes an analog subtraction signal based on residual spillover measured by a correlator operating in the receivers' digital signal processing domains and based on knowledge of the transmitted waveforms. The first adaptive cancellation system achieves a sufficient reduction of transmit-receive spillover to avoid receiver saturation or other non-linear effects, but is then added back in to the signal path in the digital domain after analog-to-digital conversion so that spillover cancellation can also operate in the digital signal processing domain to remove deleterious spillover components.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: October 17, 2017
    Assignee: UHNDER, INC.
    Inventors: Aria Eshraghi, Jean P. Bordes, Curtis Davis, Raghunath K. Rao, Murtaza Ali, Paul W. Dent
  • Publication number: 20170293025
    Abstract: A radar system processes signals in a flexible, adaptive manner to determine range, Doppler (velocity) and angle of objects in an environment. The radar system processes the received signal to achieve different objectives depending on the environment, the current information stored in the radar system, and/or external information provided to the radar system. The system allows improved resolution of range, Doppler and/or angle depending on the desired objective.
    Type: Application
    Filed: April 25, 2017
    Publication date: October 12, 2017
    Inventors: Curtis Davis, Monier Maher, Jean P. Bordes, Manju Hegde, Otto A. Schmid, Raghunath K. Rao, Marius Goldenberg, Aria Eshraghi, Vito Giannini, David S. Trager, Nikhilesh Bhagat, Srikanth Gollapudi, Sundar Govindarajan, Steve Borho, Jonathan Preussner, Paul W. Dent, Paul Bassett, Stephen W. Alland, Fred Harris, Wayne E. Stark, Murtaza Ali
  • Patent number: 9559768
    Abstract: A satellite broadcasts radio programs to mobile and fixed receivers at various locations. Ground stations supplement the satellite broadcasts in areas where the satellite signal may be shadowed. Likewise, the satellite signal supplements the terrestrial transmissions in areas with marginal terrestrial signal strength. Ground stations and a satellite transmit the same digital symbol stream over a same frequency spectrum. The symbol streams arrive in each service area of the ground stations with a relative delay that is within a window for which a receiver is adapted to decode efficiently. Spectral efficiency is achieved by allowing the ground stations to share the same frequencies as the satellites.
    Type: Grant
    Filed: February 20, 2008
    Date of Patent: January 31, 2017
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: Paul W. Dent
  • Patent number: 8401487
    Abstract: A receiver and receive processing method described herein improves the accuracy of channel estimates by correcting for the assumption that the Doppler shift (or rate-of-change-of-delay) stays constant for each frequency within a signal bandwidth of a received signal. To that end, a receiver according to the present invention comprises a channel processor having multiple processing units. A first processing unit processes reference values (e.g., pilot signals) received for each of a plurality of frequencies within a signal bandwidth at a plurality of different signal times (or the complex propagation channel coefficients estimated therefrom) to determine a set of complex wave amplitudes either for each of multiple frequencies in the signal bandwidth or for each of the different signal times.
    Type: Grant
    Filed: December 30, 2009
    Date of Patent: March 19, 2013
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Paul W. Dent, Leonid Krasny
  • Patent number: 8279745
    Abstract: A wire-based infrastructure capable of delivering high data rates is described herein. A transmission system, reception system, and/or repeater uses wire-mapping code matrices to reduce interference in multi-wire cables to increase the data rate provided by such multi-wire cables. More particularly, code mapping matrices are applied to transmission and/or received input signals to generate a mapped signal for each output wire or corresponding to each input wire such that each mapped signal comprises a different combination of all of the input signals. Different ones of the wire-mapped signals are ultimately transmitted on different wires. In so doing, the present invention facilitates crosstalk reduction, and therefore, provides a technique that increases the data rate available on multi-wire cables.
    Type: Grant
    Filed: November 23, 2009
    Date of Patent: October 2, 2012
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventor: Paul W. Dent
  • Patent number: 8265565
    Abstract: Transmitting non-polluting dummy pilot signals in a wireless communication network permits estimation of the downlink propagation channels between a number of joint transmitters and a lesser number of receivers. With fewer receivers than transmitters, loop back information from the receivers is not sufficient to determine the downlink propagation channels between the transmitters and receivers. For N transmitters and M receivers, (N?M) dummy pilot symbols are transmitted to facilitate downlink channel estimation. Each dummy pilot signal is transmitted to an imagined or dummy receiver that is virtually located such that its downlink channel coefficient vector is orthogonal to those of the real receivers. Transmit pre-filtering based on estimated propagation channels is applied to the information signals for the real receivers and to the dummy pilot signals. The extent to which the dummy pilot signals interfere at each receiver is an indication of mismatch between estimated and actual propagation channels.
    Type: Grant
    Filed: February 6, 2007
    Date of Patent: September 11, 2012
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventor: Paul W. Dent