公开(公告)号：US11822000B2

公开(公告)日：2023-11-21

申请号：US17453594

申请日：2021-11-04

Applicant: NXP B.V.

Inventor： Michael Schober ,  Pablo Corbalán Pelegrín ,  Shengyang Xu

IPC: G01S5/04 ,  G01S3/48 ,  G01S3/46 ,  G01S3/02 ,  H04B1/7163

CPC classification number: G01S3/48 ,  G01S3/46 ,  G01S3/023 ,  H04B1/7163

Abstract: A method is provided for estimating a signal's angle of arrival (AOA) in a communications system. Starting values for each of a horizontal AOA and a vertical AOA are estimated. The estimated vertical AOA starting value is used to select a horizontal PDOA trace of horizontal PDOA calibration data. The selected horizontal PDOA trace is interpolated to determine a best horizontal AOA estimate for a current iteration. The estimated horizontal AOA starting value is used to select a vertical PDOA trace of vertical PDOA calibration data. The selected vertical PDOA trace is interpolated to determine a best vertical AOA estimate for the current iteration. After each iteration, determining if a maximum number of iterations has been reached or if the best horizontal or vertical AOA estimate has not changed by a predetermined amount. When one of these is true, the best horizontal and vertical AOA estimates are used.

公开(公告)号：US20230134329A1

公开(公告)日：2023-05-04

申请号：US17453594

申请日：2021-11-04

Applicant: NXP B.V.

Inventor： Michael Schober ,  Pablo Corbalán Pelegrín ,  Shengyang Xu

IPC: G01S3/48 ,  H04B1/7163 ,  G01S3/02

Abstract: A method is provided for estimating a signal’s angle of arrival (AOA) in a communications system. Starting values for each of a horizontal AOA and a vertical AOA are estimated. The estimated vertical AOA starting value is used to select a horizontal PDOA trace of horizontal PDOA calibration data. The selected horizontal PDOA trace is interpolated to determine a best horizontal AOA estimate for a current iteration. The estimated horizontal AOA starting value is used to select a vertical PDOA trace of vertical PDOA calibration data. The selected vertical PDOA trace is interpolated to determine a best vertical AOA estimate for the current iteration. After each iteration, determining if a maximum number of iterations has been reached or if the best horizontal or vertical AOA estimate has not changed by a predetermined amount. When one of these is true, the best horizontal and vertical AOA estimates are used.

公开(公告)号：US10992419B1

公开(公告)日：2021-04-27

申请号：US16816993

申请日：2020-03-12

Applicant: NXP B.V.

Inventor： Jun Zhou ,  Shengyang Xu ,  Abdul Wahid Abdul Kareem ,  Radha Srinivasan ,  Brima Babatunde Ibrahim

IPC: H04B7/04 ,  H04L1/06 ,  H04L27/26 ,  H04B7/0413 ,  H04L5/00 ,  H04L25/02 ,  H04W24/10 ,  H04B7/06 ,  H04W72/04

Abstract: A method and device using a single transmitter (TX) and/or a single receiver (RX) is provided for determining an angle measurement between the transmitter and receiver for an ultra-wideband (UWB) system. A plurality of RX antennas is coupled to the receiver and a plurality of TX antennas is coupled to the transmitter. An IEEE 802.15.4z standard provides a silent period or gap before and after scrambled timestamp sequences (STS) in a frame. An active antenna is switched to a different antenna in the gaps. This allows the angle measurements to be performed with only a single transmitter and receiver within one channel impulse response (CIR) measurement cycle.

公开(公告)号：US11722171B2

公开(公告)日：2023-08-08

申请号：US17455437

申请日：2021-11-18

Applicant: NXP B.V.

Inventor： Diwakar Subraveti ,  Abdul Wahid Abdul Kareem ,  Shengyang Xu ,  Atmaram Kota Rajaram ,  Ajay A Jampale

IPC: H04B1/7176 ,  H04B1/7183

CPC classification number: H04B1/7176 ,  H04B1/7183

Abstract: UWB ranging methods and apparatus are disclosed. The method comprises a ranging communication with a plurality of responder devices, the ranging communication comprising: transmitting, by an initiator device, a polling signal in a time slot; receiving a respective response from each of the plurality of responder devices, overlapping and in a next time slot, each response comprising: synchronization bits, and a frame comprising Start of Frame Delimiter, and a Scrambled Timestamp Sequence; wherein the STS comprises a sequence of segments each preceded by a respective guard interval, wherein a specific one of the segments comprises data derived from a ranging key and a responder-identifier each unique to the respective responder among the plurality of responders, wherein a sequence-number of the specific segment is unique to the respective response, and wherein a remainder of the segments each comprise the same data derived from a predetermined common key and predetermined common data.

公开(公告)号：US20220200656A1

公开(公告)日：2022-06-23

申请号：US17455437

申请日：2021-11-18

Applicant: NXP B.V.

Inventor： Diwakar Subraveti ,  Abdul Wahid Abdul Kareem ,  Shengyang Xu ,  Atmaram Kota Rajaram ,  Ajay A. Jampale

IPC: H04B1/7176 ,  H04B1/7183

Abstract: UWB ranging methods and apparatus are disclosed. The method comprises a ranging communication with a plurality of responder devices, the ranging communication comprising: transmitting, by an initiator device, a polling signal in a time slot; receiving a respective response from each of the plurality of responder devices, overlapping and in a next time slot, each response comprising: synchronization bits, and a frame comprising Start of Frame Delimiter, and a Scrambled Timestamp Sequence; wherein the STS comprises a sequence of segments each preceded by a respective guard interval, wherein a specific one of the segments comprises data derived from a ranging key and a responder-identifier each unique to the respective responder among the plurality of responders, wherein a sequence-number of the specific segment is unique to the respective response, and wherein a remainder of the segments each comprise the same data derived from a predetermined common key and predetermined common data.