Patents by Inventor Ofer Friedman

Ofer Friedman 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).

  • Patent number: 10381724
    Abstract: A parabolic cylindrical reflector antenna that comprises two or more antenna feeds each directed towards a parabolic cylindrical reflector, wherein the antenna feeds are positioned in one or more line-arrays parallel to a focal line of the parabolic cylindrical reflector, and the line-array is substantially centered opposing the reflector. The antenna comprises a controller configured to scan along a straight edge of the reflector by electronically adjusting a phase of each of the antenna feeds, thereby changing the incident angle of an energy beam relative to the reflector. The controller is configured to scan along a curved edge of the reflector by moving, using a mechanical positioning mechanism, the antenna feeds in a direction parallel to a directrix of the reflector while maintaining the positioning or by electronically selecting one of two or more parallel line-arrays.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: August 13, 2019
    Assignee: International Business Machines Corporation
    Inventors: Danny Elad, Daniel Friedman, Noam Kaminski, Ofer Markish, Alberto Valdes Garcia
  • Patent number: 9538325
    Abstract: A method for determining a location of a wireless tag, the method may include generating or receiving, by a tagged mobile device, an estimated location of another tag that communicates with the tagged mobile device; receiving or generating, by the tagged mobile device, multiple distance measurements that are obtained during different points of time; wherein the multiple distance measurements are obtained during a rotational movement of the tagged mobile device and represent distances between the tagged mobile device and the other tag; finding a certain angle of rotation of the mobile device that corresponds to a minimal distance measurement of the multiple distance measurements; and amending the estimated location of the other tag based upon the certain angle of rotation.
    Type: Grant
    Filed: July 22, 2015
    Date of Patent: January 3, 2017
    Assignee: PIXIE TECHNOLOGY INC.
    Inventors: Ofer Friedman, Noam Lavi
  • Patent number: 9519812
    Abstract: A method for managing a sphere of wireless tags, the method comprises programming, by a wireless reader, a group of wireless tags to belong to the sphere of wireless tags; sending by the wireless reader sphere beacons aimed to the wireless tags of the sphere; detecting a loss of a wireless tag of the sphere if the wireless tag did not respond to a predetermined number of sphere beacons; and responding to the detecting of the loss of the wireless tag.
    Type: Grant
    Filed: November 21, 2013
    Date of Patent: December 13, 2016
    Assignee: PIXIE TECHNOLOGY INC.
    Inventors: Amir Bassan-Eskenazi, Naftaly Sharir, Ofer Friedman, Gili Elias, Giora Sussman, Eran Aharonson
  • Publication number: 20160341820
    Abstract: Method for determining a distance between a first wireless transceiver of a first device and a second wireless transceiver of a second device, the method may include sending, by the first wireless transceiver and to the second wireless transceiver, (i) a first wideband message that consists essentially of a first synchronization preamble and (ii) a first narrowband message that may include first ranging information and does not include the first synchronization preamble; receiving, by the first wireless transceiver and from the second wireless transceiver, (i) a second wideband message that consists essentially of a second synchronization preamble and (ii) a second narrowband message that may include second ranging information and does not include the second synchronization preamble; and calculating, by the first device and based on portions of the first and second ranging information, a first estimate of the distance between the first wireless transceiver and the second wireless transceiver.
    Type: Application
    Filed: May 18, 2016
    Publication date: November 24, 2016
    Inventors: Ofer Friedman, Tsach Shwartz, Gili Elias
  • Patent number: 9390302
    Abstract: A method for determining a location of a group of wireless tags, the method may include receiving first information indicative of distances between each wireless tag of the group and between at least three other wireless tags of the group; tracking a first movement of a certain tag of the group of wireless tag in relation to other wireless tags of the group to provide first movement information; receiving, after the performing of the first movement, second information indicative of distances between each wireless tag of the group and between at least three other wireless tags of the group; and determining locations of the wireless tags of the group in response to the first information, second information and the first movement information.
    Type: Grant
    Filed: November 21, 2013
    Date of Patent: July 12, 2016
    Assignee: PIXIE TECHNOLOGY INC.
    Inventors: Amir Bassan-Eskenazi, Naftaly Sharir, Ofer Friedman
  • Publication number: 20150362581
    Abstract: A method for determining a location of a wireless tag, the method may include generating or receiving, by a tagged mobile device, an estimated location of another tag that communicates with the tagged mobile device; receiving or generating, by the tagged mobile device, multiple distance measurements that are obtained during different points of time; wherein the multiple distance measurements are obtained during a rotational movement of the tagged mobile device and represent distances between the tagged mobile device and the other tag; finding a certain angle of rotation of the mobile device that corresponds to a minimal distance measurement of the multiple distance measurements; and amending the estimated location of the other tag based upon the certain angle of rotation.
    Type: Application
    Filed: July 22, 2015
    Publication date: December 17, 2015
    Inventors: Ofer Friedman, Noam Lavi
  • Publication number: 20150243158
    Abstract: A method, that may include determining, by a wireless reader, at least one locations of at least one wireless tag; determining, by a mobile device, which wireless tag out of the at least one wireless tag is a viewable wireless tag that is within a field of view of a camera of the mobile device; wherein the mobile device is either coupled to the wireless reader or comprises the wireless reader; and providing, by the mobile device, for each viewable wireless tag, a viewable wireless tag indication that is indicative of a location of each viewable wireless tag.
    Type: Application
    Filed: February 4, 2015
    Publication date: August 27, 2015
    Inventors: Amir Bassan-Eskenazi, Eran Aharonson, Ofer Friedman
  • Publication number: 20140145828
    Abstract: A method for managing a sphere of wireless tags, the method comprises programming, by a wireless reader, a group of wireless tags to belong to the sphere of wireless tags; sending by the wireless reader sphere beacons aimed to the wireless tags of the sphere; detecting a loss of a wireless tag of the sphere if the wireless tag did not respond to a predetermined number of sphere beacons; and responding to the detecting of the loss of the wireless tag.
    Type: Application
    Filed: November 21, 2013
    Publication date: May 29, 2014
    Inventors: Amir Bassan-Eskenazi, Naftaly Sharir, Ofer Friedman, Gili Elias, Giora Sussman, Eran Aharonson
  • Publication number: 20140145831
    Abstract: A method, comprising: receiving during a wideband reception period and by a wideband reception circuit of a first wireless transceiver a wideband ranging message; transmitting during a wideband transmission period and by a wideband transmission circuit of the first wireless transceiver a wideband ranging response message; receiving by a narrowband reception circuit of the first wireless transceiver received narrowband messages; and transmitting by a narrowband transmission circuit of the first wireless transceiver transmitted narrowband messages.
    Type: Application
    Filed: November 21, 2013
    Publication date: May 29, 2014
    Inventors: Amir Bassan-Eskenazi, Naftaly Sharir, Ofer Friedman, Gili Elias, Giora Sussman, Eran Aharonson
  • Publication number: 20140145881
    Abstract: A method, comprising: generating or receiving information about multiple distance measurements of distances between the wireless tag and the wireless reader at different points of time; wherein the wireless reader is positioned at different locations in relation to the wireless reader at the different points of time; generating or receiving information about a spatial relationship between the different locations or receiving information indicative of the spatial; and determining the location of the wireless tag in response to the multiple range measurements and the spatial relationship between the different locations.
    Type: Application
    Filed: November 21, 2013
    Publication date: May 29, 2014
    Inventors: Amir Bassan-Eskenazi, Naftaly Sharir, Ofer Friedman, Giora Sussman
  • Publication number: 20140148195
    Abstract: A method for determining a location of a group of wireless tags, the method may include receiving first information indicative of distances between each wireless tag of the group and between at least three other wireless tags of the group; tracking a first movement of a certain tag of the group of wireless tag in relation to other wireless tags of the group to provide first movement information; receiving, after the performing of the first movement, second information indicative of distances between each wireless tag of the group and between at least three other wireless tags of the group; and determining locations of the wireless tags of the group in response to the first information, second information and the first movement information.
    Type: Application
    Filed: November 21, 2013
    Publication date: May 29, 2014
    Inventors: Amir Bassan-Eskenazi, Naftaly Sharir, Ofer Friedman
  • Publication number: 20140148196
    Abstract: A method for locating a user within an indoor space, the method comprises: receiving by a computer, distance information about distances between multiple wireless tags that are positioned within the indoor space; wherein the distance information is obtained by the multiple wireless tags during a first type of distance estimation process that comprises wirelessly transmitting messages between the multiple wireless tags; determining locations of the wireless tags in the indoor space in response to the distance information and to calibration information indicative of an actual or estimated location of at least one wireless tag in the indoor space; receiving, from a user device, user device location information related to a location of the user device in relation to a sub-set of the wireless tags; determining a location of the user device within the indoor space in response to the user device location information and to locations of the wireless tags of the sub-set of wireless tags in the indoor space.
    Type: Application
    Filed: November 21, 2013
    Publication date: May 29, 2014
    Inventors: Amir Bassan-Eskenazi, Naftaly Sharir, Ofer Friedman
  • Publication number: 20140145829
    Abstract: A method for detecting a presence of a tagged item within a tagged enclosure, the method comprising performing distance measurements between at least one wireless tag of the tagged enclosure and the tagged item to determine the spatial relationship between the tagged enclosure and the tagged item.
    Type: Application
    Filed: November 21, 2013
    Publication date: May 29, 2014
    Inventors: Amir Bassan-Eskenazi, Naftaly Sharir, Ofer Friedman
  • Patent number: 8189456
    Abstract: A novel and useful mechanism for reducing the required backoff and the peak to average power ratio (PAPR) needed for an OFDM transmitter whiles still meeting spectral mask and EVM specifications. The mechanism searches, for each packet to be transmitted, for several possible scrambler and encryption sequences that would yield the best spectral mask and EVM with lowest PAPR. The search can be performed using the existing transmitter and receiver PHY circuit chain to modulate and demodulate the candidate hypotheses. Once the scrambler sequence and/or encryption sequence is selected, the packet is transmitted using the selected scrambler and encryption sequences. In addition, the invention exploits the fact that even for very low backoff margins, a reduced number of candidate hypotheses may be tested while still yielding a high probability of meet the spectral mask and EVM specifications.
    Type: Grant
    Filed: January 31, 2007
    Date of Patent: May 29, 2012
    Assignee: Texas Instruments Incorporated
    Inventors: Yossi Tsfaty, Ofer Friedman, Itay Sherman, Avi Baum
  • Patent number: 7787563
    Abstract: A transmitter employing a sigma delta modulator having a noise transfer function adapted to shift quantization noise outside at least one frequency band of interest. A technique is presented to synthesize the controllers within a single-loop sigma delta modulator such that the noise transfer function can be chosen arbitrarily from a family of functions satisfying certain conditions. Using the novel modulator design technique, polar and Cartesian (i.e. quadrature) transmitter structures are supported. A transmitter employing polar transmit modulation is presented that shapes the spectral emissions of the digitally-controlled power amplifier such that they are significantly and sufficiently attenuated in one or more desired frequency bands. Similarly, a transmitter employing Cartesian transmit modulation is presented that shapes the spectral emissions of a hybrid power amplifier such that they are significantly and sufficiently attenuated in one or more desired frequency bands.
    Type: Grant
    Filed: December 7, 2005
    Date of Patent: August 31, 2010
    Assignee: Texas Instruments Incorporated
    Inventors: Nir Tal, Sameh S. Rezeq, Robert B. Staszewski, Oren E. Eliezer, Ofer Friedman
  • Patent number: 7787630
    Abstract: A novel system and method for correcting the residual phase offset between a recovered pilot signal and the received stereo signal. The invention uses a Costas loop as an auxiliary loop in addition to the pilot recovery phase locked loop (PLL) to lock onto the stereo component itself. This auxiliary loop functions to generate a pilot to stereo component phase correction signal that is added to the stereo carrier phase The resultant phase is used to generate the recovered pilot carrier used to demodulate the stereo MPX signal. The Costas loop is activated together with the main pilot recovery PLL that locks onto the pilot tone in the demodulated MPX signal. The auxiliary Costas loop is operative to track and determine a residual phase error of up to several degrees.
    Type: Grant
    Filed: August 16, 2006
    Date of Patent: August 31, 2010
    Assignee: Texas Instruments Incorporated
    Inventors: Gregory Lerner, Nir Tal, Ofer Friedman
  • Patent number: 7701997
    Abstract: A novel and useful fast hopping frequency synthesizer and transmitter associated therewith. The frequency synthesizer and transmitter incorporates a digitally controlled oscillator (DCO) adapted to operate open loop. Instantaneous frequency switching is achieved by changing an oscillator tuning word (OTW) to imitate the three oscillators of a UWB transmitter. In one embodiment, the DCO can change the frequency instantaneously within the 1/fT of the varactor devices used to construct the DCO. An all digital phase lock loop (ADPLL) is used for offline calibration prior to the start of packet transmission or reception. Any phase shift during the switching is tracked by a digital circuit in the transmitter. In a second embodiment, additional frequency accuracy is provided by use of a numerically controlled oscillator (NCO) that functions to generate a fine resolution complex exponential waveform which effectively shifts the synthesized frequency.
    Type: Grant
    Filed: September 18, 2007
    Date of Patent: April 20, 2010
    Assignee: Texas Instruments Incorporated
    Inventors: Nir Tal, Robert B. Staszewski, Ofer Friedman
  • Patent number: 7460499
    Abstract: An on-chip reduced complexity modulation noise estimation mechanism for performing nonlinear signal processing to analyze modulation noise to determine whether a semiconductor device under test complies with the performance criteria set by specifications or a standard corresponding thereto. When used in a two-point transmitter modulation architecture, the mechanism relies on the fact that the noise statistics at the output of the transmitter can be determined by observing the phase error output of the phase detector within the phase locked loop. In the digital embodiment of the mechanism, the phase error signal is compared to a configurable threshold value to generate an exception event. If the number of exception events exceeds a configurable max_fail value after comparisons of a configurable number of phase error samples, the test fails. A pass/fail signal is output reflecting the result of the test.
    Type: Grant
    Filed: January 16, 2004
    Date of Patent: December 2, 2008
    Assignee: Texas Instruments Incorporated
    Inventors: Oren Eliezer, Bogdan Staszewski, Ofer Friedman
  • Publication number: 20080043818
    Abstract: A novel and useful fast hopping frequency synthesizer and transmitter associated therewith. The frequency synthesizer and transmitter incorporates a digitally controlled oscillator (DCO) adapted to operate open loop. Instantaneous frequency switching is achieved by changing an oscillator tuning word (OTW) to imitate the three oscillators of a UWB transmitter. In one embodiment, the DCO can change the frequency instantaneously within the 1/fT of the varactor devices used to construct the DCO. An all digital phase lock loop (ADPLL) is used for offline calibration prior to the start of packet transmission or reception. Any phase shift during the switching is tracked by a digital circuit in the transmitter. In a second embodiment, additional frequency accuracy is provided by use of a numerically controlled oscillator (NCO) that functions to generate a fine resolution complex exponential waveform which effectively shifts the synthesized frequency.
    Type: Application
    Filed: September 18, 2007
    Publication date: February 21, 2008
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Nir Tal, Robert Staszewski, Ofer Friedman
  • Patent number: D747989
    Type: Grant
    Filed: June 20, 2014
    Date of Patent: January 26, 2016
    Assignee: PIXIE TECHNOLOGY INC.
    Inventors: Amir Bassan-Eskenazi, Giora Sussman, Ofer Friedman, Yoav Tikochinsky, Ran Litvak, David Damshek, Eyal Carmi