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1.发明授权公开(公告)号：US11947003B2
公开(公告)日：2024-04-02
申请号：US17599171
申请日：2020-04-16
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.
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公开(公告)号：US11630518B2
公开(公告)日：2023-04-18
申请号：US16969037
申请日：2019-01-22
Inventor： Hui Chen , Tarig Ballal Khidir Ahmed , Tareq Yousef Al-Naffouri
Abstract: A method for motion tracking and text recognition, the method including a step of generating ultrasound waves with a transmitter; a step of receiving the ultrasound waves at a receiver, the receiver including sensors that record the ultrasound waves; a step of estimating with a processor, angle-of-arrival information for the ultrasound waves; a step of associating the angle-of-arrival information with a gesture; a step of extracting features from the gesture; and a step of classifying the gesture as a specific text character based on the extracted features by comparing the extracted features with known text characters stored in one or more templates.
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公开(公告)号：US10386481B1
公开(公告)日：2019-08-20
申请号：US16040191
申请日：2018-07-19
Inventor： Hui Chen , Tarig Ballal Khidir Ahmed , Mohamed Saadeldin , Tareq Yousef Al-Naffouri
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.
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公开(公告)号：US11207017B2
公开(公告)日：2021-12-28
申请号：US16468855
申请日：2017-12-12
Inventor： Furrukh Sana , Tarig Ballal Khidir Ahmed , Ibrahim Hoteit , Tareq Yousef Al-Naffouri
Abstract: A method of estimating fetal electrocardiogram (FECG) signals utilizes a plurality of ECG signals measured along the mother's abdomen. The method includes defining an MECG (ECG) dictionary of symbols and projecting the plurality of abdominal ECG signals onto the MECG dictionary to estimate MECG signals within each of the plurality of abdominal ECG signals. The estimated MECG signals are subtracted from the plurality of measured abdominal ECG signals to estimate FECG signals and the plurality of estimated FECG signals are combined to generate a representation of the FECG source signal.
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