公开(公告)号：US20230384437A1

公开(公告)日：2023-11-30

申请号：US18328256

申请日：2023-06-02

Applicant: QUALCOMM Incorporated

Inventor： Solomon Trainin ,  Assaf Kasher ,  Alecsander Eitan ,  Ariel Sagi

IPC: G01S13/00 ,  G01S13/32

CPC classification number: G01S13/003 ,  G01S13/325

Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for multistatic radar communications. In some implementations, a transmitting device may transmit, to a receiving device, a radar alert frame followed by a codeword and one or more radar pulses. The radar pulses are transmitted, using beamforming, in a number of directions. The timing information indicates a timing offset or delay between one or more codewords of the codeword sequence and the beginning of the radar pulses. The receiving device may detect one or more codewords of the codeword sequence and an echo of at least one of the radar pulses, and determine the time at which the corresponding pulse was transmitted by the transmitting device. The receiving device may compare the timing of the echo with the timing of the transmitted pulse to determine a relative distance of an object that produced the echo.

公开(公告)号：US11703582B2

公开(公告)日：2023-07-18

申请号：US17111386

申请日：2020-12-03

Applicant: QUALCOMM Incorporated

Inventor： Solomon Trainin ,  Assaf Kasher ,  Alecsander Eitan ,  Ariel Sagi

IPC: G01S13/00 ,  G01S13/32

CPC classification number: G01S13/003 ,  G01S13/325

Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for multistatic radar communications. In some implementations, a transmitting device may transmit, to a receiving device, a radar alert frame followed by a codeword and one or more radar pulses. The radar pulses are transmitted, using beamforming, in a number of directions. The timing information indicates a timing offset or delay between one or more codewords of the codeword sequence and the beginning of the radar pulses. The receiving device may detect one or more codewords of the codeword sequence and an echo of at least one of the radar pulses, and determine the time at which the corresponding pulse was transmitted by the transmitting device. The receiving device may compare the timing of the echo with the timing of the transmitted pulse to determine a relative distance of an object that produced the echo.

公开(公告)号：US20210173065A1

公开(公告)日：2021-06-10

申请号：US17111386

申请日：2020-12-03

Applicant: QUALCOMM Incorporated

Inventor： Solomon Trainin ,  Assaf Kasher ,  Alecsander Eitan ,  Ariel Sagi

IPC: G01S13/00 ,  G01S13/32

Abstract: This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for multistatic radar communications. In some implementations, a transmitting device may transmit, to a receiving device, a radar alert frame followed by a codeword and one or more radar pulses. The radar pulses are transmitted, using beamforming, in a number of directions. The timing information indicates a timing offset or delay between one or more codewords of the codeword sequence and the beginning of the radar pulses. The receiving device may detect one or more codewords of the codeword sequence and an echo of at least one of the radar pulses, and determine the time at which the corresponding pulse was transmitted by the transmitting device. The receiving device may compare the timing of the echo with the timing of the transmitted pulse to determine a relative distance of an object that produced the echo.

公开(公告)号：US10560917B2

公开(公告)日：2020-02-11

申请号：US15693391

申请日：2017-08-31

Applicant: QUALCOMM Incorporated

Inventor： Assaf Yaakov Kasher ,  Amichai Sanderovich ,  Alecsander Eitan

IPC: H04W64/00 ,  H04W72/04 ,  G01S5/12 ,  H04W4/02 ,  H04L27/26

Abstract: In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may include a processing system configured to generate a frame including a data field and a plurality of training subfields. The data field may include information indicating a different direction for transmitting each of the training subfields. The apparatus may include an interface configured to output the frame for transmission with the data field in a first direction and the training subfields in their respective directions.

公开(公告)号：US10379196B2

公开(公告)日：2019-08-13

申请号：US15191498

申请日：2016-06-23

Applicant: QUALCOMM Incorporated

Inventor： Carlos Horacio Aldana ,  Jeff Smith ,  Xiaoxin Zhang ,  Chia-Hui Lin ,  Yen-Feng Lee ,  Ravi Gidvani ,  Alecsander Eitan ,  Rahul Malik

IPC: G01S5/00 ,  H04W4/02 ,  G01S5/02 ,  H04W24/10 ,  H04W88/02 ,  H04W84/12

Abstract: Disclosed embodiments facilitate wireless channel calibration, ranging, and direction finding, between networked devices. A method on a first station (STA) may comprise: broadcasting, at a first time, a first NDPA frame to a plurality of second STAs. The first NDPA frame may include a first bit indicating that one or more subsequent frames comprise ranging or angular information. After a Short Interval Frame Space (SIFS) time interval from the first time, a second frame may be broadcast. The second frame may be a Null Data Packet (NDP) frame. In response, a plurality of Compressed Beamforming (CBF) frames may be received at the first STA where each CBF frame may be received from a distinct corresponding second STA, and may include Channel Feedback Information field with information pertaining to communication channel between the first STA and the corresponding second STA. The communications may be encoded using Orthogonal Frequency Division Multiple Access.

公开(公告)号：US10333669B2

公开(公告)日：2019-06-25

申请号：US15439048

申请日：2017-02-22

Applicant: QUALCOMM Incorporated

Inventor： Alecsander Eitan ,  Amichai Sanderovich ,  Gal Basson

IPC: H04L5/00 ,  H04W52/52 ,  H04B7/0413 ,  H04L27/26 ,  H04L25/02

Abstract: Disclosed is an apparatus for wireless communications. The apparatus includes a processing system configured to generate a single-channel frame, a bonded channel frame, or a MIMO channel frame. Each of the frame types includes a first portion and a second portion, said first portion being decodable by a first device operating according to a first protocol, said second portion not being decodable by the first device, wherein the first and second portions are decodable by a second device operating according to a second protocol; and an interface configured to output the frame for transmission. The second portion includes a first field including frequency-domain PRBS data for AGC, a second field including a time-domain sequence for timing of input sample window for FFT processing, and a third field including frequency-domain pilots for channel estimation. For MIMO, these fields for different transmit chains are transmitted in a time aligned manner.

公开(公告)号：US20190081693A1

公开(公告)日：2019-03-14

申请号：US15700461

申请日：2017-09-11

Applicant: QUALCOMM Incorporated

Inventor： Alecsander Eitan ,  Amichai Sanderovich

IPC: H04B7/08 ,  H01Q3/36

Abstract: In certain aspects of the present disclosure, an apparatus for wireless communications is provided. The apparatus comprises a plurality of block circuits, wherein each one of the plurality of block circuits is configured to receive a respective plurality of signals from a respective subset of antenna elements of an antenna array. Each one of the plurality of block circuits comprises a respective plurality of phase shifters configured to shift phases of the respective plurality of signals to obtain a respective plurality of phase-shifted signals, and a respective combiner configured to combine the respective plurality of phase-shifted signals into a respective combined signal. The apparatus also comprises a plurality of time-delay elements configured to delay the combined signals to obtain a plurality of delayed combined signals, and a combiner configured to combine the plurality of delayed combined signals into a total combined signal.

公开(公告)号：US20190068133A1

公开(公告)日：2019-02-28

申请号：US15688766

申请日：2017-08-28

Applicant: QUALCOMM Incorporated

Inventor： Igor Gutman ,  Ariel Sagi ,  Alecsander Eitan

IPC: H03F1/32

Abstract: Certain aspects of the present disclosure are directed to a digital predistortion (DPD) device for use within a wireless transmitter that permits the use of a downstream digital-to-analog converter that operates at a clock rate close to the bandwidth of a digital baseband input signal. In some examples, a sampling rate of a digital baseband input signal is increased using an upsampler to obtain an increased rate digital input signal. Predistortion is applied to the increased rate digital input signal using a DPD device to obtain a predistorted digital signal. The sampling rate of the predistorted digital signal is then decreased using a downsampler to obtain a lower-rate predistorted digital signal with a sampling rate below the increased rate of the upsampler (e.g. close to the bandwidth of a digital baseband input signal). A low pass filter may be provided to filter out-of-band signal components from the predistorted digital signal.

公开(公告)号：US10135640B2

公开(公告)日：2018-11-20

申请号：US15393763

申请日：2016-12-29

Applicant: QUALCOMM Incorporated

Inventor： Amichai Sanderovich ,  Ran Hay ,  Reuven Alpert ,  Alecsander Eitan

IPC: H04L25/03 ,  H04B7/08 ,  H04B7/06 ,  H04L5/00 ,  H04W16/28

Abstract: A technique is disclosed for reducing interference in a communication system including a plurality of wireless devices. A first device transmits an RTS-TRN frame including a Request to Send (RTS) portion and a first beam training sequence to determine whether a communication medium is available to communicate with a second device. If the communication medium is available, the second device transmits a CTS-TRN frame including a Clear to Send (CTS) portion and a second beam training sequence. One or more neighboring devices that receive the RTS-TRN frame and/or the CTS-TRN frame configure their respective antennas to generate one or more nulls aimed at the first and second devices when transmitting signals, as long as the first and second devices are communicating based on a duration field in the RTS-TRN frame and/or CTS-TRN frame. This reduces interference at the first and/or second devices.

公开(公告)号：US20170250831A1

公开(公告)日：2017-08-31

申请号：US15191493

申请日：2016-06-23

Applicant: QUALCOMM Incorporated

Inventor： Carlos Horacio Aldana ,  Jeff Smith ,  Xiaoxin Zhang ,  Chia-Hui Lin ,  Yen-Feng Lee ,  Ravi Gidvani ,  Alecsander Eitan ,  Rahul Malik

IPC: H04L12/18 ,  H04W24/10 ,  H04L12/841

CPC classification number: G01S5/0009 ,  G01S5/021 ,  G01S5/0226 ,  H04W4/02 ,  H04W4/029 ,  H04W24/10 ,  H04W84/12 ,  H04W88/02

Abstract: Disclosed embodiments facilitate wireless channel calibration, including ranging and direction finding, between wirelessly networked devices. In some embodiments. a method on a first station (STA) may comprise: transmitting a first NDPA frame to one or more second stations (STAs), the first NDPA frame comprising a first bit indicating that one or more subsequent frames comprise ranging or angular information; and transmitting, after a Short Interval Frame Space (SIFS) time interval, a second frame. The second frame may be one of: a Null Data Packet az (NDP_az) frame with information about a time of transmission of the NDP_az frame, or a Null Data Packet (NDP) frame, or a Beam Refinement Protocol (BRP) frame. The first NDPA frame may be unicast, multicast, or broadcast.