-
公开(公告)号：US12009890B2
公开(公告)日：2024-06-11
申请号：US17856305
申请日：2022-07-01
Applicant: NEC Laboratories America, Inc.
Inventor： Mohammad Khojastepour , Nariman Torkzaban
IPC: H04B7/0456 , H04B7/06
CPC classification number: H04B7/0482 , H04B7/0617
Abstract: A communications system for hybrid beamforming is provided. The communications system includes a base station encoding data into a plurality of streams, each transmitted through a radio frequency chain. The communication system further includes a beamforming codebook including a set of beamforming codewords. The communications system also includes a beamformer transmitting a given one of the plurality of streams through multiple antennas by adjusting a phase and a gain of symbols of the given one of the plurality of streams for each of the multiple antennas by using a corresponding beamforming coefficient of a given beamforming codeword chosen from the beamforming codebook. A beam and its corresponding beamforming codeword is designed such that the mean squared error between the beam pattern generated with the given beamforming codeword and a given beam pattern is minimized.
-
公开(公告)号：US11743163B2
公开(公告)日：2023-08-29
申请号：US17331078
申请日：2021-05-26
Applicant: NEC Laboratories America, Inc.
Inventor： Mohammad Khojastepour , Shahram Shahsavari
IPC: H04L43/12 , H04W16/28 , H04B7/0408 , H04B7/06 , H04W72/044
CPC classification number: H04L43/12 , H04B7/0408 , H04B7/0617 , H04B7/0619 , H04B7/0695 , H04W16/28 , H04W72/046
Abstract: Methods for transmitting data include sending a first probing packet using a first scanning beam, selected from a set of scanning beams. Feedback about the first probing packet is determined. A second probing packet is sent using a second scanning beam, selected from the set of scanning beams based on the determined feedback about the first probing packet. Feedback about the second probing packet is determined. A data transmission beam is determined based on the set of scanning beams and the received feedback about the first probing packet and the second probing packet. Data is transmitted using an antenna that is configured according to the determined transmission beam.
-
公开(公告)号：US11620880B2
公开(公告)日：2023-04-04
申请号：US17171155
申请日：2021-02-09
Applicant: NEC Laboratories America, Inc.
Inventor： Mohammad Khojastepour , Mustafa Arslan , Sampath Rangarajan , Eugene Chai , Carlos Bocanegra
IPC: G07G1/00 , G06Q20/20 , G06K7/10 , G06K19/07 , G06N3/04 , G06N3/08 , G06Q10/08 , G06Q20/18 , G07C9/00 , G06Q10/087
Abstract: Systems and methods for is provided for self-checkout at a point-of-sale. The system and method includes a plurality of radio frequency identification (RFID) transceivers, an RFID reader, wherein the RFID reader is configured to receive a response with an RFID code from each of a plurality of RFID tags activated simultaneously by at least one of the plurality of radio frequency identification (RFID) transceivers, and decode the RFID code from the response received from each of the RFID tags, and a classifier configured to determine whether each of the plurality of RFID tags is inside or outside a walk-through checkout area inside a store, wherein the system calculates an amount charged to a customer based on the cost of the items identified as within the walk-through checkout area.
-
公开(公告)号：US11415669B2
公开(公告)日：2022-08-16
申请号：US16578967
申请日：2019-09-23
Applicant: NEC Laboratories America, Inc.
Inventor： Mohammad Khojastepour , Mustafa Arslan , Sampath Rangarajan
Abstract: Devices and systems for implementing a walk-through gate are provided. The devices include a walk-through gate structure having boundaries that have curved inner surfaces on each side of a cavity. The curved inner surfaces are partially covered by a reflective material. The devices include radio frequency (RF) signal transmitters positioned tangent to the curved inner surfaces and RF signal receivers. The devices also include apertures that provide access to the cavity of the walk-through gate structure.
-
公开(公告)号：US20220229187A1
公开(公告)日：2022-07-21
申请号：US17575193
申请日：2022-01-13
Applicant: NEC Laboratories America, Inc.
Inventor： Eugene Chai , Karthikeyan Sundaresan , Mohammad Khojastepour , Timothy Woodford
Abstract: A method is provided for beam management. The method includes obtaining, by a Light Detection and Radar (LiDAR) sensor having one or more LiDAR cameras performing ray-tracing, out-of-band infrared measurements of a surrounding environment. The method further includes selecting, by a base station, a transmission and reception beam pair for use in the surrounding environment from a plurality of available transmission and reception beam pairs responsive to the out-of-band measurements of the surrounding environment.
-
Patent Agency Ranking
公开(公告)号：US20210377144A1
公开(公告)日：2021-12-02
申请号：US17331112
申请日：2021-05-26
Applicant: NEC Laboratories America, Inc.
Inventor： Mohammad Khojastepour , Shahram Shahsavari
Abstract: Transmission systems include a configurable antenna, that transmits according to a configured beam, a hardware processor, and a memory that stores a computer program product. When the computer program product is executed by the hardware processor, it causes the hardware processor to send a first probing packet on the antenna using a first scanning beam, selected from a set of scanning beams, to determine feedback about the first probing packet, to send a second probing packet on the antenna using a second scanning beam, selected from the set of scanning beams based on the determined feedback about the first probing packet, to determine feedback about the second probing packet, to determine a data transmission beam based on the set of scanning beams and the received feedback about the first probing packet and the second probing packet, and to transmit data using the antenna, configured according to the determined transmission beam.
-
公开(公告)号：US20210312146A1
公开(公告)日：2021-10-07
申请号：US17219948
申请日：2021-04-01
Applicant: NEC Laboratories America, Inc.
Inventor： Mohammad Khojastepour , Mustafa Arslan , Sampath Rangarajan
Abstract: A method for employing cycle counting is presented. The method includes interrogating, by an RFID reader, RFID tags by using a plurality of antenna ports, determining, by an activation sequencer, an activation sequence of the plurality of antenna ports that have been enabled, collecting RFID tag responses from each of the RFID tags, and matching one or more of the RFID tag responses to a particular antenna port of the plurality of antenna ports in an activation cycle.
-
公开(公告)号：US11120233B2
公开(公告)日：2021-09-14
申请号：US16376039
申请日：2019-04-05
Applicant: NEC Laboratories America, Inc.
Inventor： Mohammad Khojastepour , Mustafa Arslan , Sampath Rangarajan
Abstract: A Radio Frequency Identification (RFID) localization system is provided. The system includes a set of passive RFID tags, each for reflecting transmitted signals. The system further includes an RFID reader for detecting the reflected signals by the passive RFID tags. The system also includes a processor for localizing an object in an area based on the reflected signals by computing signatures using probabilistic macro-channels between the RFID reader and locations of the passive RFID tags. The transmitted signals form inputs to the probabilistic macro-channels, and the signatures form outputs from the probabilistic macro-channels.
-
公开(公告)号：US20210248580A1
公开(公告)日：2021-08-12
申请号：US17171143
申请日：2021-02-09
Applicant: NEC Laboratories America, Inc.
Inventor： Mohammad Khojastepour , Mustafa Arslan , Sampath Rangarajan , Eugene Chai , Carlos Bocanegra
Abstract: Systems and methods for self-checkout at a point-of-sale are provided. The system and method includes using a plurality of radio frequency identification (RFID) transceivers within a store, and an RFID reader configured to receive an RFID code from an RFID tag activated by the plurality of radio frequency identification (RFID) transceivers. The system and method also includes using a classifier configured to determine whether the RFID tag is inside or outside a designated area, wherein the classifier is trained in a manner that a number of items incorrectly identified as being purchased is below a threshold to minimize customer dissatisfaction (CDS) determined as the ratio of the value of items charged to the customer but not purchased by a customer to the total charge to the customer.
-
公开(公告)号：US20210218459A1
公开(公告)日：2021-07-15
申请号：US17143422
申请日：2021-01-07
Applicant: NEC Laboratories America, Inc.
Inventor： Mohammad Khojastepour
Abstract: A computer-implemented method is provided for finding a data transmission beam from an Access Point (AP) to a User Equipment (UE) in a communication system. The method includes selecting a probing beam from a set of probing beams. The method further includes sending a plurality of probing packets from the AP to the UE using a dedicated probing beam selected for each probing packet from among the set of probing beams. The method also includes receiving feedback from the UE regarding the plurality of probing packets. The method additionally includes computing the data transmission beam based on the received feedback and the set of probing beams.
-
-
-
-
-
-
-
-
-
Search Results
140
records
(took 0.03 seconds)
