Search results for: Md. Omar Khyam
article
IEEE Sensors Journal > 2017 > 17 > 2 > 434 - 443
Ultrasonic-based distance measurements using time-of-flight (TOF) is a fundamental technique for different applications across a wide variety of fields. In general, cross correlation between a transmitted and received signal is considered to be the optimal TOF estimation technique, which produces a peak at the time delay between them. Cross correlation provides a superior performance in conjunction...
article
IEEE Sensors Journal > 2016 > 16 > 13 > 5325 - 5336
Ultrasonic positioning systems (UPSs) are used for various types of applications across a wide variety of fields, including robot navigation, device location, and pose estimation. In this paper, the focus is on investigating two major problems in the signaling and positioning the phases of existing UPSs and providing corresponding solutions. First, most of the existing UPSs use a single tone or a...
chapter
Estimation of bottom profile is one of the important geo-acoustic reversal problems in underwater acoustics that gives an idea about depth and structure of the sub-bottom layers of the ocean. Estimation of time of arrival (TOA) of bottom and sub-bottom reflections are the key to these estimations. To estimate TOAs from different bottom layers, an active sonar transmits a signal and receive its bottom...
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Ultrasonic positioning systems are used for various types of applications across a wide variety of fields, including robot navigation, device location and pose estimation. Current ultrasonic positioning systems have limitations when simultaneously locating multiple transmitters in three-dimensional (3D) space using narrowband ultrasonic transducers. They are also unable to calculate a transmitter's...
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Typically, indoor positioning systems require higher precision than outdoor positioning systems. Outdoor positioning technologies such as GPS provide poor accuracy in indoor environments due to signal attenuation by the building fabric. In indoor environments, commercial motion-capture systems are proficient at measuring the 3D position of an object precisely. The main disadvantages of this method...
chapter
Three dimensional (3D) positioning systems are used in many applications across a wide variety of fields, including entertainment, sports science and medical treatment. Among the medical applications, emerging areas include: gait analysis, rehabilitation, medical robotics and biofeedback systems. Traditionally, these positioning systems use optical motion capture techniques. The main disadvantages...
