Patents by Inventor Kent Falk

Kent Falk 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: 20240045023
    Abstract: The present disclosure relates to a multiple-input multiple-output (MIMO) radar system comprising an antenna comprising at least two sparse transmit arrays, each sparse transmit array comprising a plurality of antenna elements. The antenna elements of each sparse transmit arrays are at least partially overlapping with the antenna elements of the other sparse transmit arrays of the at least two sparse transmit arrays. Further, there is control circuitry connected to the antenna. The control circuitry is configured to transmit a signal having a waveform by means of each sparse transmit array, wherein the waveform of each signal is substantially orthogonal relative to a waveform of each other signal of each other sparse transmit arrays of the at least two sparse transmit arrays.
    Type: Application
    Filed: November 22, 2021
    Publication date: February 8, 2024
    Inventor: Kent FALK
  • Patent number: 11662428
    Abstract: A radar system and method for maintaining radar performance of radar system in jammed environment are provided. The radar system has main antenna arrangement for transmitting and/or receiving electromagnetic waves. Main antenna arrangement includes at least one main antenna element and at least one main electronics module for transmitting and/or receiving signals to/from at least one main antenna element. The system has auxiliary antenna arrangement for transmitting and/or receiving electromagnetic waves, auxiliary antenna arrangement includes at least one auxiliary antenna element and at least one auxiliary electronics module for transmitting and/or receiving signals to/from the at least one auxiliary antenna element. System has a controller connected to main antenna arrangement and to auxiliary antenna arrangement. Controller is configured to transmit first radar waveform from main antenna element, and transmit second radar waveform from auxiliary antenna element.
    Type: Grant
    Filed: October 25, 2018
    Date of Patent: May 30, 2023
    Assignee: SAAB AB
    Inventor: Kent Falk
  • Publication number: 20210389419
    Abstract: A radar system and method for maintaining radar performance of radar system in jammed environment are provided. The radar system has a main antenna arrangement for transmitting and/or receiving electromagnetic waves. Main antenna arrangement includes at least one main antenna element and at least one main electronics module for transmitting and/or receiving signals to/from at least one main antenna element. The system has auxiliary antenna arrangement for transmitting and/or receiving electromagnetic waves, auxiliary antenna arrangement includes at least one auxiliary antenna element and at least one auxiliary electronics module for transmitting and/or receiving signals to/from the at least one auxiliary antenna element. System has a controller connected to main antenna arrangement and to auxiliary antenna arrangement. Controller is configured to transmit first radar waveform from main antenna element, and transmit second radar waveform from auxiliary antenna element.
    Type: Application
    Filed: October 25, 2018
    Publication date: December 16, 2021
    Inventor: Kent FALK
  • Patent number: 9170321
    Abstract: A method for suppressing repetition jammer signals and/or clutter signals by using a radar system wherein said radar system comprises, at least one wideband arbitrary waveform generator, for creating arbitrary waveforms, and at least one antenna operating with wide instantaneous bandwidth, enabling direction dependent waveform radiation, wherein said method comprises the steps of transmitting different waveforms in different directions; adapting transmitted waveforms in different directions depending on received waveforms such that a normalised signal to noise-jammer ratio, NSNJR, is maximized; and thereby providing received signals from repetition jammers and/or clutter that are substantially orthogonal to a received signal from a target; thereby achieving suppression of the repetition jammers and/or clutter.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: October 27, 2015
    Assignee: SAAB AB
    Inventor: Kent Falk
  • Patent number: 8571508
    Abstract: A method to minimize influence of interference sources by control of a signal to noise/interference ratio of a wideband antenna system connected to an electronic system. The wideband antenna system includes at least one array of at least two antenna elements/sub arrays. The signal to noise/interference ratio control includes establishing of cancellation directions for interfering frequencies in the antenna pattern in the direction of interference sources. The wideband antenna system is operational over a system bandwidth and operates with an instantaneous bandwidth. Estimation of interference source parameters is performed in an evaluation process. A wideband antenna system implementing the method.
    Type: Grant
    Filed: July 16, 2009
    Date of Patent: October 29, 2013
    Assignee: Saab AB
    Inventor: Kent Falk
  • Publication number: 20130234877
    Abstract: A method for suppressing repetition jammer signals and/or clutter signals by using a radar system wherein said radar system comprises, at least one wideband arbitrary waveform generator, for creating arbitrary waveforms, and at least one antenna operating with wide instantaneous bandwidth, enabling direction dependent waveform radiation, wherein said method comprises the steps of transmitting different waveforms in different directions; adapting transmitted waveforms in different directions depending on received waveforms such that a normalised signal to noise-jammer ratio, NSNJR, is maximized; and thereby providing received signals from repetition jammers and/or clutter that are substantially orthogonal to a received signal from a target; thereby achieving suppression of the repetition jammers and/or clutter.
    Type: Application
    Filed: November 19, 2010
    Publication date: September 12, 2013
    Applicant: SAAB AB
    Inventor: Kent Falk
  • Publication number: 20120115429
    Abstract: A method to minimize influence of interference sources by control of a signal to noise/interference ratio of a wideband antenna system connected to an electronic system. The wideband antenna system includes at least one array of at least two antenna elements/sub arrays. The signal to noise/interference ratio control includes establishing of cancellation directions for interfering frequencies in the antenna pattern in the direction of interference sources. The wideband antenna system is operational over a system bandwidth and operates with an instantaneous bandwidth. Estimation of interference source parameters is performed in an evaluation process. A wideband antenna system implementing the method.
    Type: Application
    Filed: July 16, 2009
    Publication date: May 10, 2012
    Applicant: SAAB AB
    Inventor: Kent Falk
  • Publication number: 20120098702
    Abstract: Embodiments of the invention include a method to control an antenna pattern of a wideband array antenna wherein a wideband array antenna unit comprising the wideband array antenna and transforming means is accomplished. Embodiments of the invention further include the corresponding wideband array antenna unit and transforming means arranged to control an antenna pattern of an antenna system. The separation between antenna elements in the wideband array antenna can be increased to above one half wavelength of a maximum frequency within a system bandwidth when the array antenna is arranged to operate with an instantaneously wideband waveform.
    Type: Application
    Filed: December 27, 2011
    Publication date: April 26, 2012
    Applicant: SAAB AB
    Inventor: Kent Falk
  • Patent number: 8115679
    Abstract: Embodiments include a method to suppress side lobes of a main antenna by creating cancellation directions using a Side Lobe Canceller (SLC). Various embodiments also provide the Side Lobe Canceller.
    Type: Grant
    Filed: February 5, 2009
    Date of Patent: February 14, 2012
    Assignee: SAAB AB
    Inventor: Kent Falk
  • Patent number: 8111191
    Abstract: Embodiments of the invention include a method to control an antenna pattern of a wideband array antenna wherein a wideband array antenna unit comprising the wideband array antenna and transforming means is accomplished. Embodiments of the invention further include the corresponding wideband array antenna unit and transforming means arranged to control an antenna pattern of an antenna system. The separation between antenna elements in the wideband array antenna can be increased to above one half wavelength of a maximum frequency within a system bandwidth when the array antenna is arranged to operate with an instantaneously wideband waveform.
    Type: Grant
    Filed: February 5, 2009
    Date of Patent: February 7, 2012
    Assignee: Saab AB
    Inventor: Kent Falk
  • Patent number: 7944392
    Abstract: A method for processing received radar returns of a radiated wide-band arbitrary waveform in a wide-band radar processing system using spectral processing. The received wide-band radar returns are undersampled by using a first sampling rate to obtain an undersampled digital wide-band radar waveform. Spectral processing is performed on the power spectrum of the undersampled digital wide-band radar waveform in order to obtain a discrete ripple frequency power spectrum of the undersampled digital wide-band radar waveform. Ripple frequencies indicating radar targets are located in the discrete ripple frequency power spectrum of the undersampled digital wide-band radar waveform. A radar receiver, a digital wide-band radar processing system and a computer program product.
    Type: Grant
    Filed: March 24, 2009
    Date of Patent: May 17, 2011
    Assignee: SAAB AB
    Inventor: Kent Falk
  • Patent number: 7755535
    Abstract: A radar system comprising at least two spatially separated antenna units, each comprising one antenna. Each antenna unit comprising a signal generator connected to an antenna constitutes a transmitting antenna unit, and each antenna comprising a receiver connected to an antenna constitutes a receiving antenna. At least one receiving antenna unit is arranged for receiving at least one reflected signal, comprising signals transmitted from at least one transmitting antenna unit, having been reflected from at least one object, where the number of antenna units exceeds two. A processing unit is arranged to perform a correlation calculation, comparing at least one received signal with a set of mathematically manipulated copies. From said set, there is only one match for each reflected signal. The present invention also relates to corresponding methods.
    Type: Grant
    Filed: February 9, 2006
    Date of Patent: July 13, 2010
    Assignee: Telefonaktiebolaget LM Ericsson (Pub)
    Inventor: Kent Falk
  • Patent number: 7696945
    Abstract: A sparse array antenna is disclosed. The antenna comprises series-fed antenna array columns tuned to a respective transmit and receive frequency. The transmitting and receiving radiation elements are formed with a given distance between each transmitting radiator element and each receiving radiator element, and the series-fed antenna columns are arranged in parallel, perpendicular to a symmetry line forming a symmetric interleaved transmit/receive array. Furthermore the receiving array columns operate as parasitic elements in a transmit mode and transmitting array columns operate as parasitic elements in a receive mode, thereby reducing creation of grating lobes. The created sparse array antenna may further be arranged to be scannable to also provide reduced sidelobes entering visual space when scanning the main radiation lobe from an off boresight direction. Typically the series-fed array columns may be formed as extended ridged slotted wave-guides tuned to a respective transmitting or receiving frequency.
    Type: Grant
    Filed: November 27, 2003
    Date of Patent: April 13, 2010
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Bengt Svensson, Kent Falk, Ulrika Engström
  • Publication number: 20090295623
    Abstract: A method for processing received radar returns of a radiated wide-band arbitrary waveform in a wide-band radar processing system using spectral processing. The received wide-band radar returns are undersampled by using a first sampling rate to obtain an undersampled digital wide-band radar waveform. Spectral processing is performed on the power spectrum of the undersampled digital wide-band radar waveform in order to obtain a discrete ripple frequency power spectrum of the undersampled digital wide-band radar waveform. Ripple frequencies indicating radar targets are located in the discrete ripple frequency power spectrum of the undersampled digital wide-band radar waveform. A radar receiver, a digital wide-band radar processing system and a computer program product.
    Type: Application
    Filed: March 24, 2009
    Publication date: December 3, 2009
    Applicant: SAAB AB
    Inventor: Kent FALK
  • Publication number: 20090267836
    Abstract: A system and method for detecting and locating a radio frequency emitter. A number, N, of receiving units using the same bandwidth, center frequency, and measurement time duration receive signals from the emitter. Higher Order Statistics (HOS) are used to calculate a correlation function between the received signals using one of the received signals as a reference. Results of the correlation function are used to form volumes of probabilities in a subset of an N?1 dimensional space of information regarding the location of the emitter. Each correlation function result in the subset corresponds to a single point in physical space.
    Type: Application
    Filed: June 27, 2006
    Publication date: October 29, 2009
    Applicant: TELEFONAKETIEBOLAGET L M ERICSSON
    Inventor: Kent Falk
  • Publication number: 20090256749
    Abstract: Embodiments include a method to suppress side lobes of a main antenna by creating cancellation directions using a Side Lobe Canceller (SLC). Various embodiments also provide the Side Lobe Canceller.
    Type: Application
    Filed: February 5, 2009
    Publication date: October 15, 2009
    Applicant: SAAB ABSE-581
    Inventor: Kent Falk
  • Publication number: 20090201214
    Abstract: Embodiments of the invention include a method to control an antenna pattern of a wideband array antenna wherein a wideband array antenna unit comprising the wideband array antenna and transforming means is accomplished. Embodiments of the invention further include the corresponding wideband array antenna unit and transforming means arranged to control an antenna pattern of an antenna system. The separation between antenna elements in the wideband array antenna can be increased to above one half wavelength of a maximum frequency within a system bandwidth when the array antenna is arranged to operate with an instantaneously wideband waveform.
    Type: Application
    Filed: February 5, 2009
    Publication date: August 13, 2009
    Applicant: SAAB ABSE-581
    Inventor: Kent Falk
  • Publication number: 20090027256
    Abstract: A radar system comprising at least two spatially separated antenna units, each comprising one antenna. Each antenna unit comprising a signal generator connected to an antenna constitutes a transmitting antenna unit, and each antenna comprising a receiver connected to an antenna constitutes a receiving antenna. At least one receiving antenna unit is arranged for receiving at least one reflected signal, comprising signals transmitted from at least one transmitting antenna unit, having been reflected from at least one object, where the number of antenna units exceeds two. A processing unit is arranged to perform a correlation calculation, comparing at least one received signal with a set of mathematically manipulated copies. From said set, there is only one match for each reflected signal. The present invention also relates to corresponding methods.
    Type: Application
    Filed: February 9, 2006
    Publication date: January 29, 2009
    Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventor: Kent Falk
  • Patent number: 7432850
    Abstract: The invention refers to a method and device for wideband radar, the method comprising: —generating a wideband signal (1, 6) with a bandwidth B; —copying the wideband signal (1, 6); —transmitting the wideband signal (6?); —receiving a returned echo signal (11) from the transmitted signal (6?); —dividing the copied signal into a number, Nf, of subsequent frequency bands b; —manipulating the copied and divided signal into an anticipated signal (10) by adding a number Nd of anticipated delays and a number of ND Doppler stretches to the copied and divided signal for each Nf subsequent frequency band b; —dividing the received signal (17) into a number, Nf, of subsequent frequency bands b; —correlating corresponding frequency bands in the divided received signal (17) and the anticipated signal (10) giving NdND correlated signals (19) for determining range (R) to a target and velocity (v) of the target.
    Type: Grant
    Filed: October 13, 2004
    Date of Patent: October 7, 2008
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventor: Kent Falk
  • Publication number: 20070273603
    Abstract: A sparse array antenna is disclosed. The antenna comprises series-fed antenna array columns tuned to a respective transmit and receive frequency. The transmitting and receiving radiation elements are formed with a given distance between each transmitting radiator element and each receiving radiator element, and the series-fed antenna columns are arranged in parallel, perpendicular to a symmetry line forming a symmetric interleaved transmit/receive array. Furthermore the receiving array columns operate as parasitic elements in a transmit mode and transmitting array columns operate as a parasitic elements in a receive mode, thereby reducing creation of grating lobes. The created sparse array antenna may further be arranged to be scanable to also provide reduced sidelobes entering visual space when scanning the main radiation lobe from an off boresight direction. Typically the series-fed array columns may be formed as extended ridged slotted wave-guides tuned to a respective transmitting or receiving frequency.
    Type: Application
    Filed: November 27, 2003
    Publication date: November 29, 2007
    Inventors: Bengt Svensson, Kent Falk, Ulrika Engstrom