Patents by Inventor Ahmadreza Rofougaran

Ahmadreza Rofougaran 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: 20190190551
    Abstract: In an outphasing radio frequency (RF) transmitter, detecting differences of a first plurality of signal characteristics of a first plurality of amplified RF signals across at least a transmitter antenna or a plurality of load impedances, wherein the first plurality of amplified RF signals correspond to a first plurality of constant-envelope signals, and controlling generation of a second plurality of constant-envelope signals on a plurality of transmission paths. The second plurality of constant-envelope signals are generated based on the detected differences of the first plurality of signal characteristics. At least one of first calibrating or second calibrating, a second plurality of signal characteristics of the second plurality of constant-envelope signals. The first calibrating and the second calibrating are based on the controlled generation of the second plurality of constant-envelope signals.
    Type: Application
    Filed: November 30, 2018
    Publication date: June 20, 2019
    Inventors: Farid Shirinfar, Ahmadreza Rofougaran, Sam Gharavi, Kartik Sridharan, Michael Boers, Seunghwan Yoon, Donghyup Shin, Stephen Wu, Maryam Rofougaran
  • Patent number: 10323943
    Abstract: A wireless receiver includes an antenna panel providing input to an H-combined/V-combined generation block, a hybrid tracking system receiving input from the H-combined/V-combined generation block, the hybrid tracking system comprising location, heading and motion (LOHMO) sensors for providing a general position input to a digital core, the hybrid tracking system further comprising first and second power detectors for measuring power received from the antenna panel and for providing a precise position input to the digital core, the hybrid tracking system providing phase feedback signals to the H-combined/V-combined generation block. At least one of the phase feedback signals is provided to at least one phase shifter in the H-combined/V-combined generation block to cause a phase shift in at least one linearly polarized signal received from at least one antenna in the antenna panel.
    Type: Grant
    Filed: August 1, 2016
    Date of Patent: June 18, 2019
    Assignee: Movandi Corporation
    Inventors: Sam Gharavi, Farid Shirinfar, Seunghwan Yoon, Alfred Grau Besoli, Maryam Rofougaran, Ahmadreza Rofougaran
  • Publication number: 20190181916
    Abstract: In a first radio frequency (RF) device, circuits determine a non-line-of-sight (NLOS) radio path, and select a first plurality of reflector devices associated with the NLOS radio path from a second plurality of reflector devices. The first plurality of reflector devices, are selected based on a first set of criteria, includes an active reflector device and a passive reflector device, and are controlled to transmit a plurality of RF signals to a second RF device based on a second set of criteria. The second RF device is associated with electronic devices. The first RF signal interferes with a second RF signal of the RF signals. A first type of signal associated with the plurality of RF signals is converted to a second type of signal at the second RF device, and the second type of signal is transmitted by the second RF device to the one or more electronic devices.
    Type: Application
    Filed: August 24, 2018
    Publication date: June 13, 2019
    Inventors: Ahmadreza Rofougaran, Seunghwan Yoon
  • Publication number: 20190181920
    Abstract: A system, in a radio frequency (RF) transmitter device, dynamically selects one or more reflector devices along a non-line-of-sight (NLOS) radio path based on a defined criteria. Further, the dynamically selected one or more reflector devices are controlled based on one or more conditions. In an RF receiver device, communicates with the dynamically selected one or more reflector devices comprising an active reflector device. The active reflector device comprises at least a first antenna array and a second antenna array. The first antenna array transmits a first set of beams of RF signals to at least the RF transmitter device and the RF receiver device. The second antenna array receives a second set of beams of RF signals from at least the RF transmitter device and the RF receiver device.
    Type: Application
    Filed: December 7, 2017
    Publication date: June 13, 2019
    Inventors: Ahmadreza Rofougaran, Seunghwan Yoon
  • Publication number: 20190181560
    Abstract: A system, in a programmable active reflector (AR) device associated with a first radio frequency (RF) device and a second RF device, receives a request and associated metadata from the second RF device via a first antenna array. Based on the received request and associated metadata, one or more antenna control signals are received from the first RF device. The programmable AR device is dynamically selected and controlled by the first RF device based on a set of criteria. A controlled plurality of RF signals is transmitted, via a second antenna array, to the second RF device within a transmission range of the programmable AR device based on the associated metadata. The controlled plurality of RF signals are cancelled at the second RF device based on the associated metadata.
    Type: Application
    Filed: December 8, 2017
    Publication date: June 13, 2019
    Inventors: Kartik Sridharan, Ahmadreza Rofougaran, Michael Boers, Seunghwan Yoon, Sam Gharavi, Donghyup Shin, Farid Shirinfar, Stephen Wu, Maryam Rofougaran
  • Patent number: 10321332
    Abstract: A system, in an active reflector device, adjusts a first amplification gain of each of a plurality of radio frequency (RF) signals received at a receiver front-end from a first equipment via a first radio path of an NLOS radio path. A first phase shift is performed on each of the plurality of RF signals with the adjusted first amplification gain. A combination of the plurality of first phase-shifted RF signals is split at a transmitter front-end. A second phase shift on each of the split first plurality of first phase-shifted RF signals is performed. A second amplification gain of each of the plurality of second phase-shifted RF signals is adjusted.
    Type: Grant
    Filed: May 30, 2017
    Date of Patent: June 11, 2019
    Assignee: MOVANDI CORPORATION
    Inventors: Ahmadreza Rofougaran, Sam Gharavi, Kartik Sridharan, Michael Boers, Seunghwan Yoon, Donghyup Shin, Farid Shirinfar, Stephen Wu, Maryam Rofougaran
  • Patent number: 10298275
    Abstract: An outphasing transmitter includes a decomposition block, first and second power amplifiers, and a dual-polarized antenna in a phased array antenna panel. The decomposition block decomposes a composite input signal into first and second decomposed RF signals. The first and second decomposed RF signals are coupled to the first and second power amplifiers. The first power amplifier is coupled to a vertically-polarized probe, and the second power amplifier is coupled to a horizontally-polarized probe. A plurality of dual-polarized antennas may be utilized. The first power amplifier is coupled to each vertically-polarized probe; while the second power amplifier is coupled to each horizontally-polarized probe.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: May 21, 2019
    Assignee: Movandi Corporation
    Inventors: Sam Gharavi, Ahmadreza Rofougaran, Maryam Rofougaran, Farid Shirinfar
  • Patent number: 10298284
    Abstract: A full duplex transceiver includes a phased array antenna panel transmitter and a phased array antenna panel receiver. The full duplex transceiver may include at least one dummy antenna row situated between the phased array antenna panel transmitter and the phased array antenna panel receiver, the at least one dummy antenna row having at least one dummy antenna connected to a terminating resistor. The phased array antenna panel transmitter forms a desired radio frequency (RF) transmit beam at a target angle, and forms a null at an angle so as to minimize reception of offending transmit signals at said phased array antenna panel receiver. The phased array antenna panel receiver may receive offending transmit signals from the phased array antenna panel transmitter and a desired receive signal at a combined input power level.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: May 21, 2019
    Assignee: Movandi Corporation
    Inventors: Sam Gharavi, Seunghwan Yoon, Ahmadreza Rofougaran
  • Patent number: 10291296
    Abstract: A wireless transceiver using a phased array antenna panel for producing multiple beams includes receive antennas forming a receive configuration and transmit antennas forming a transmit configuration. The receive antennas form a plurality of receive beams and the transmit antennas form a plurality of transmits beams, based on phase and amplitude information provided by a master chip in the phased array antenna panel. The receive and transmit configurations can include sub-configurations, each sub-configuration forming one of the plurality of receive beams or one of the plurality of transmit beams. At least one receive antenna and at least one transmit antenna can be connected to a corresponding plurality of receive phase shifters and a corresponding plurality of transmit phase shifters respectively. The wireless transceiver can form a relay transmit beam based on a receive beam provided by a hardwire connection.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: May 14, 2019
    Assignee: Movandi Corporation
    Inventors: Sam Gharavi, Ahmadreza Rofougaran, Farid Shirinfar, Michael Boers, Seunghwan Yoon, Alfred Grau Besoli, Maryam Rofougaran
  • Patent number: 10290920
    Abstract: A wireless receiver includes an antenna panel divided into a plurality of segments, each segment having a group of antennas, each segment having a set of radio frequency (RF) front end chips. Each RF front end chip is coupled to some antennas in the group of antennas. A master chip is configured to drive in parallel a plurality of control buses. Each control bus is coupled to a respective one of the plurality of segments, where each RF front end chip in the set of RF front end chips is serially coupled to another RF front end chip in the set of RF front end chips. Each control bus carries phase shift signals and amplitude control signals from the master chip to a respective set of RF front end chips in each segment. The master chip and the plurality of segments in the antenna panel are integrated on a single printed circuit board.
    Type: Grant
    Filed: August 2, 2016
    Date of Patent: May 14, 2019
    Assignee: Movandi Corporation
    Inventors: Michael Boers, Farid Shirinfar, Sam Gharavi, Seunghwan Yoon, Alfred Grau Besoli, Maryam Rofougaran, Ahmadreza Rofougaran
  • Publication number: 20190109627
    Abstract: Select, from transmit paths within the transmitter chip, a first transmit path for a first transmit signal and a second transmit path for a second transmit signal. The transmit paths are associated with a plurality of antenna elements of an antenna array. Determine of an added signal and/or a subtracted signal associated with the first transmit signal and the second transmit signal. Determine at least one of a first signal strength value of the added signal or a second signal strength value of the subtracted signal. Adjust a first signal parameter of the second transmit signal relative to a corresponding first signal parameter of the first transmit signal until the first signal strength value is a first value or the second signal strength value is a second value. Calibrate an offset of the corresponding first signal parameter based on the adjusted first signal parameter in the second transmit path.
    Type: Application
    Filed: November 30, 2018
    Publication date: April 11, 2019
    Inventors: Kartik Sridharan, Ahmadreza Rofougaran, Michael Boers, Seunghwan Yoon, Sam Gharavi, Donghyup Shin, Farid Shirinfar, Stephen Wu, Maryam Rofougaran
  • Patent number: 10256537
    Abstract: A lens-enhanced phased array antenna panel includes a phased array antenna panel and at least one lens situated over the phased array antenna panel. The phased array antenna panel has a plurality of antennas arranged in a plurality of antenna segments. Each lens corresponds to at least one of the antenna segments. Each lens is configured to increase a gain of its corresponding antenna segment. Each lens increases a total gain of the phased array antenna panel. Additionally, each lens can provide an angular offset to direct a radio frequency (RF) beam onto its corresponding antenna segment.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: April 9, 2019
    Assignee: Movandi Corporation
    Inventors: Alfred Grau Besoli, Seunghwan Yoon, Ahmadreza Rofougaran, Farid Shirinfar, Sam Gharavi, Michael Boers, Maryam Rofougaran
  • Publication number: 20190103911
    Abstract: A base station is configured to transmit a substantially unidirectional RF beam to a donor. The donor is in close proximity to a building, and provides communication signals corresponding to the unidirectional RF beam to a relay inside the building. The relay includes a phased array antenna panel having a staggered antenna assignment with predetermined phases for antennas in the phased array antenna panel to produce omnidirectional broad-beam RF signals inside the building.
    Type: Application
    Filed: December 4, 2018
    Publication date: April 4, 2019
    Inventors: Sam Gharavi, Ahmadreza Rofougaran, Maryam Rofougaran, Farid Shirinfar
  • Publication number: 20190097305
    Abstract: A phased array antenna panel includes a first plurality of antennas, a first radio frequency (RF) front end chip, a second plurality of antennas, a second RF front end chip, and a combiner RF chip. The first and second RE front end chips receive respective first and second input signals from the first and second pluralities of antennas, and produce respective first and second output signals based on the respective first and second input signals. The combiner RF chip can receive the first and second output signals and produce a power combined output signal that is a combination of powers of the first and second output signals. Alternatively, a power combiner can receive the first and second output signals and produce a power combined output signal, and the combiner RF chip can receive the power combined output signal.
    Type: Application
    Filed: November 29, 2018
    Publication date: March 28, 2019
    Inventors: Ahmadreza ROFOUGARAN, Seunghwan YOON, Alfred Grau Besoli, Farid SHIRINFAR, Sam GHARAVI, Michael BOERS, Maryam ROFOUGARAN
  • Patent number: 10243594
    Abstract: The circuit includes a transformer having a first primary coil coupled to a first power amplifier (PA), a second primary coil coupled to a second PA, and a secondary coil. The secondary coil supplies a current to an antenna based on a first direction of a first phase of a first amplified constant-envelope signal in the first primary coil with respect to a second phase of a second amplified constant-envelope signal in the second primary coil. A first load impedance is associated with the first PA and a second load impedance is associated with the second PA. The first load impedance and the second load impedance receive currents from the first PA and second PA, respectively, based on a second direction of the first phase of the first amplified constant-envelope signal with respect to the second phase of the second amplified constant-envelope signal.
    Type: Grant
    Filed: March 19, 2018
    Date of Patent: March 26, 2019
    Assignee: MOVANDI CORPORATION
    Inventors: Ahmadreza Rofougaran, Sam Gharavi, Farid Shirinfar, Kartik Sridharan, Michael Boers, Seunghwan Yoon, Donghyup Shin, Stephen Wu, Maryam Rofougaran
  • Publication number: 20190087049
    Abstract: An assistive device and method for non-visually discerning a three-dimensional (3D) real-world area surrounding a user, comprises a haptic feedback interface that includes a plurality of haptic elements. The assistive device receives sensor data of the 3D real-world area within a first proximity range of the assistive device from a plurality of different types of sensors that are communicatively coupled to the assistive device. The assistive device establishes a mapping of a plurality of objects within the first proximity range to the plurality of haptic elements in a defined region of the haptic feedback interface, based on the received sensor data. A haptic feedback generator generates a touch-discernible feedback on the haptic feedback interface based on the established mapping. The touch-discernible feedback comprises a plurality of differential touch-discernible cues to enable the user to non-visually discern the 3D real-world area surrounding the user.
    Type: Application
    Filed: September 20, 2017
    Publication date: March 21, 2019
    Inventors: Alex Hamid Mani, Ahmadreza Rofougaran
  • Patent number: 10199717
    Abstract: A phased array antenna panel includes a first plurality of antennas, a first radio frequency (RF) front end chip, a second plurality of antennas, a second RF front end chip, and a combiner RF chip. The first and second RF front end chips receive respective first and second input signals from the first and second pluralities of antennas, and produce respective first and second output signals based on the respective first and second input signals. The combiner RF chip can receive the first and second output signals and produce a power combined output signal that is a combination of powers of the first and second output signals. Alternatively, a power combiner can receive the first and second output signals and produce a power combined output signal, and the combiner RF chip can receive the power combined output signal.
    Type: Grant
    Filed: November 18, 2016
    Date of Patent: February 5, 2019
    Assignee: MOVANDI CORPORATION
    Inventors: Ahmadreza Rofougaran, Seunghwan Yoon, Alfred Grau Besoli, Farid Shirinfar, Sam Gharavi, Michael Boers, Maryam Rofougaran
  • Publication number: 20190028127
    Abstract: The circuit includes a transformer having a first primary coil coupled to a first power amplifier (PA), a second primary coil coupled to a second PA, and a secondary coil. The secondary coil supplies a current to an antenna based on a first direction of a first phase of a first amplified constant-envelope signal in the first primary coil with respect to a second phase of a second amplified constant-envelope signal in the second primary coil. A first load impedance is associated with the first PA and a second load impedance is associated with the second PA. The first load impedance and the second load impedance receive currents from the first PA and second PA, respectively, based on a second direction of the first phase of the first amplified constant-envelope signal with respect to the second phase of the second amplified constant-envelope signal.
    Type: Application
    Filed: March 19, 2018
    Publication date: January 24, 2019
    Inventors: Ahmadreza Rofougaran, Sam Gharavi, Farid Shirinfar, Kartik Sridharan, Michael Boers, Seunghwan Yoon, Donghyup Shin, Stephen Wu, Maryam Rofougaran
  • Publication number: 20190020402
    Abstract: An active repeater device includes a primary sector and at least a secondary sector communicatively coupled to the primary sector receives or transmits a first beam of input RF signals having a first beam pattern from or to a base station, respectively. The primary sector includes an baseband signal processor and a first radio head (RH) unit. The secondary sector comprises a second RH unit. The first beam pattern covers a first geographical area. Beamforming coefficients are generated to convert the first beam pattern of the first beam of input RF signals to a second beam pattern. A second beam of output RF signals in the second beam pattern is transmitted from or received by, respectively, the secondary sector to or from, respectively, a plurality of user equipment (UEs) based on the generated beamforming coefficients and the received first beam of input RF signals.
    Type: Application
    Filed: July 11, 2018
    Publication date: January 17, 2019
    Inventors: Sam GHARAVI, Ahmadreza ROFOUGARAN, Michael BOERS, Seunghwan YOON, Kartik SRIDHARAN, Donghyup SHIN, Farid SHIRINFAR, Stephen WU, Maryam ROFOUGARAN
  • Publication number: 20190020407
    Abstract: An active repeater device including a first antenna array, a controller, and one or more secondary sectors receives or transmits a first beam of input RF signals from or to, respectively, a first base station operated by a first service provider and a second beam of input RF signals from or to, respectively, a second base station operated by a second service provider. A controller assigns a first beam setting to a first group of customer premises equipment (CPEs) and a second beam setting to a second group of CPEs, based on one or more corresponding signal parameters associated with the each corresponding group of CPEs. A second antenna array of the second RH unit concurrently transmits or received a first beam of output RF signals to or from the first group of CPEs and a second beam of output RF signals to the second group of CPEs.
    Type: Application
    Filed: July 11, 2018
    Publication date: January 17, 2019
    Inventors: Sam GHARAVI, Ahmadreza ROFOUGARAN, Michael BOERS, Seunghwan YOON, Kartik SRIDHARAN, Donghyup SHIN, Farid SHIRINFAR, Stephen WU, Maryam ROFOUGARAN