公开(公告)号：US10386481B1

公开(公告)日：2019-08-20

申请号：US16040191

申请日：2018-07-19

Applicant: KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Hui Chen ,  Tarig Ballal Khidir Ahmed ,  Mohamed Saadeldin ,  Tareq Yousef Al-Naffouri

IPC: G08B21/00 ,  G01S15/58 ,  G01S15/87 ,  G06F3/01

Abstract: A method and system for gesture recognition using angle-of-arrival information. The method includes generating ultrasound waves with a transmitter; receiving the ultrasound waves at a receiver that includes two pairs of sensors that record the ultrasound waves; estimating with a processor, first and second angle-of-arrivals θx(ti),θy(ti) for the ultrasound waves, where x and y indicate two perpendicular axes that form a plane in which the two pairs of sensors are distributed and the first and second angle-of-arrivals are defined relative to the plane; grouping N estimated first and second angle-of-arrivals θx(ti),θy(ti) values to form a matrix g that corresponds to the predetermined path; comparing the matrix g with plural gesture templates from a gesture dictionary; identifying a gesture template from the plural gesture templates that corresponds to the predetermined path; and displaying the gesture template associated with the predetermined path.

公开(公告)号：US12092718B2

公开(公告)日：2024-09-17

申请号：US17603401

申请日：2020-04-16

Applicant: KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Mohammed Hussain Alsharif ,  Tareq Yousef Alnaffouri ,  Mohamed Saadeldin ,  Mohamed Siala

IPC: H04J13/00 ,  G01S3/808 ,  G01S11/14 ,  G01S15/74

CPC classification number: G01S11/14 ,  G01S3/808 ,  G01S15/74 ,  H04J13/0062

Abstract: A method for estimating a range of a moving target, the method including emitting, from a target, a first ultrasound signal T, wherein the first ultrasound signal T is generated based on a first differential Zadoff-Chu sequence x; receiving, at a receiver, a second ultrasound signal R, which corresponds to the first ultrasound signal T, wherein the second ultrasound signal R includes a second differential Zadoff-Chu sequence y; correlating the first ultrasound signal T with the second ultrasound signal R to calculate an initial time of flight estimate taucorr; and calculating an initial range estimate dcorr by multiplying the initial time of flight estimate taucorr with a speed of sound c. A differential Zadoff-Chu sequence is different from a Zadoff-Chu sequence.

公开(公告)号：US11947003B2

公开(公告)日：2024-04-02

申请号：US17599171

申请日：2020-04-16

Applicant: KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Mohammed Hussain Alsharif ,  Tareq Yousef Al-Naffouri ,  Mohamed Saadeldin ,  Mohamed Siala

IPC: G01S15/00 ,  G01S15/52 ,  G01S15/89

CPC classification number: G01S15/52 ,  G01S15/8984

Abstract: A method for estimating a range of a moving target includes emitting, from a target, a first ultrasound signal T, wherein the first ultrasound signal T is generated based on a first differential Zadoff-Chu sequence x; receiving, at a receiver, a second ultrasound signal R, which corresponds to the first ultrasound signal T, wherein the second ultrasound signal R includes a second differential Zadoff-Chu sequence y; applying a maximum likelihood estimator to the first ultrasound signal T and the second ultrasound signal R to calculate an initial time of flight estimate taucorr; and calculating an initial range estimate dcorr of the target by multiplying the initial time of flight estimate taucorr with a speed of sound c. A differential Zadoff-Chu sequence is different from a Zadoff-Chu sequence.