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Kaveh Pahlavan
Worcester Polytechnic Institute
309Publications
43H-index
8,954Citations
Publications 309
Newest
Umair Khan7
Estimated H-index: 7
(Worcester Polytechnic Institute),
Yunxing Ye (Audi)+ 2 AuthorsKaveh Pahlavan43
Estimated H-index: 43
(Worcester Polytechnic Institute)
In this paper, we compute and examine two-way localization limits for an RF endoscopy pill as it passes through an individuals gastrointestinal (GI) tract. We obtain finite-difference time-domain and finite element method-based simulation results position assessment employing time of arrival (TOA). By means of a 3-D human body representation from a full-wave simulation software and lognormal models for TOA propagation from implant organs to body surface, we calculate bounds on location estimator...
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2018
Chen Li (Worcester Polytechnic Institute), Yu Li (Worcester Polytechnic Institute)+ 2 AuthorsKaveh Pahlavan43
Estimated H-index: 43
(Worcester Polytechnic Institute)
The use of consumer drones has increased greatly in the last few years. It is important in many situations to be able to determine the location of unwanted drones for the sake of privacy, security, and safety. In this paper, a localization system is designed to determine the location of an unwanted drone in an outdoor line of sight (LOS) situation by using its wireless signal transmitted for communication with the controller. Two algorithms using the received signal strength (RSS) of the unwante...
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2018
Liyuan Xu2
Estimated H-index: 2
(University of Science and Technology Beijing),
Jie He12
Estimated H-index: 12
(University of Science and Technology Beijing)
+ 3 AuthorsQin Wang7
Estimated H-index: 7
(University of Science and Technology Beijing)
In emergent scenarios, such as firefighting, the rescuer can be guided to the trapped person efficiently with the knowledge of relative positional relationship. In this paper, we presented a body motion assisted indoor geolocation system using time-of-arrival (TOA) and received-signal-strength (RSS) values of ultra-wide-band (UWB) signal, in which the human body acts as a single reference point. Measurements of TOA and RSS of UWB signal with different settings have been conducted in typical indo...
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2018 in IEEE AccessIF: 3.56
Liyuan Xu2
Estimated H-index: 2
(University of Science and Technology Beijing),
Jie He12
Estimated H-index: 12
(University of Science and Technology Beijing)
+ 3 AuthorsQin Wang7
Estimated H-index: 7
(University of Science and Technology Beijing)
To find the relative positional relationship accurately and efficiently without pre-installed infrastructure in emergent scenarios like firefighting, we proposed a rotating-anchor based indoor geolocation system using time of arrival (TOA) technique in this paper. In this system, the positioning problem is regarded as a template-matching problem to estimate direction of the target. Based on preliminary results, further measurements that the tester held the locator and turned around continuously ...
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Fardad Askarzadeh1
Estimated H-index: 1
(Worcester Polytechnic Institute),
Kaveh Pahlavan43
Estimated H-index: 43
(Worcester Polytechnic Institute)
+ 3 AuthorsUmair Khan7
Estimated H-index: 7
(Worcester Polytechnic Institute)
In line-of-sight (LoS) conditions, the accuracy of time-of-arrival (ToA) based localization has proven to be superior to the received-signal-strength (RSS) and the angle-of-arrival (AoA) localization techniques. The accuracy of TOA ranging is limited to unexpected ranging errors caused by the human body obstructing the direct path (DP) between a transmitter and a receiver. Validated analysis of this effect is a challenging problem, and this paper proposes an analytical Uniform Geometrical Theory...
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Seongah Jeong6
Estimated H-index: 6
(Harvard University),
Joonhyuk Kang12
Estimated H-index: 12
(KAIST)
+ 1 AuthorsVahid Tarokh57
Estimated H-index: 57
(Harvard University)
In this paper, performance analysis of hybrid localization based on radio-frequency (RF) and inertial measurement unit (IMU) measurements for a single wireless capsule endoscopy (WCE) traveling the gastrointestinal tract is studied. Specifically, the multiple body-mounted sensors are considered which are located on the front and back of a patient’s medical jacket and form the uniform rectangular arrays (URAs). With the aim of locating the WCE, two types of RF measurements, namely time-of-arrival...
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2017
Hamza Abujrida , Emmanuel Agu10
Estimated H-index: 10
,
Kaveh Pahlavan43
Estimated H-index: 43
People afflicted with Parkinson's Disease (PD) experience impairment of their gait (the way a person walks), which frequently results in falls. In this paper we investigate a machine learning method to assess PD severity using accelerometer data passively crowdsourced from participants' smartphones while they walked. Time and frequency domain features such as entropy rate and peak frequency, and postural sway features were extracted from accelerometer data and classified. Our work is the first t...
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2017 in Personal, Indoor and Mobile Radio Communications
Julang Ying1
Estimated H-index: 1
(Worcester Polytechnic Institute),
Kaveh Pahlavan43
Estimated H-index: 43
(Worcester Polytechnic Institute),
Xinrong Li18
Estimated H-index: 18
(Worcester Polytechnic Institute)
With the emergence of the Internet-of-Things (IoT), a number of low-power RF devices with diversified power levels will be deployed in the smart buildings. The radiated Received-Signal-Strength (RSS) from these devices can be used to improve the precision of the commonly used RSS-based Wi-Fi localization. In this paper, we introduce an analytical framework for calculation of the Cramer-Rao Lower Bound (CRLB) in an environment with variable radiated powers from sensors to complement the Wi-Fi loc...
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2016 in IEEE Sensors JournalIF: 2.62
Nader Bargshady3
Estimated H-index: 3
(Worcester Polytechnic Institute),
Gabe Garza1
Estimated H-index: 1
,
Kaveh Pahlavan43
Estimated H-index: 43
(Worcester Polytechnic Institute)
Precise tracking of things (PToT) using RF signals has posed a serious challenge in indoor environment. However, the need for more precision in tracking people and inventories in indoor environment has been gaining traction. Furthermore, there are demands for location-based services, such as micro-fencing for targeted advertisement. Precision is key for successful launch of the aforementioned applications. PToT relies on two main components, a novel hybrid 3-D fingerprint database and precise na...
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