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Search Publications by: Kamran Sayrafian (Fed)

Displaying 126 - 150 of 178

Self-Deployment Algorithms for Field Coverage in a Network of Nonidentical Mobile Sensors

June 1, 2011

Author(s)

Kamran Sayrafian

In this paper, efficient deployment algorithms are proposed for a mobile sensor network to improve coverage. The proposed algorithms calculate the position of the sensors iteratively based on the existing coverage holes in the target field. The

Impact of an Aortic Valve Implant on Body Surface UWB Propagation: A Preliminary Study

March 1, 2011

Author(s)

Kamran Sayrafian, Wen-Bin Yang

Efficient transceiver design in body area networks requires in-depth understanding of the propagation channel which in this case involves the human body. Several studies have been done to characterize RF propagation on the body surface and determine the

A DS-CDMA Interference Cancellation Technique for Body Area Networks

September 27, 2010

Author(s)

Wen-Bin Yang, Kamran Sayrafian

A low complexity Parallel Interference Cancellation (PIC) technique that is applicable to body area networks is presented. Using Direct-Sequence Code Division Multiple Access (DS-CDMA), the technique aims at suppressing interference caused by rapid changes

Simulation Model for the IEEE 802.15.3/3b WPAN Standard

September 15, 2010

Author(s)

Kamran Sayrafian

The1IEEE 802.15.3 is an emerging technology for high data rate wireless multimedia applications in Wireless Personal Area Networks (WPAN). In this paper, a discrete event simulation model has been implemented using OPNET2 Modeler to simulate the essential

Towards Evolutionary-Pricing Framework for Mobile Sensor Network Self-organization

July 18, 2010

Author(s)

Vladimir V. Marbukh, Kamran Sayrafian, Hamid Mahboubi, Ahmadreza Momeni, Amir G. Aghdam

This paper reports on work in progress on developing a unified co-evolutionary/pricing framework for Mobile Sensor Networks (MSN) self-organization. MSN self-organization involves cooperative sensor positioning and formation of a multi-hop Mobile Ad-hoc

Optimal Target Tracking Strategy with Controlled Node Mobility in Mobile Sensor Networks

June 30, 2010

Author(s)

Kamran Sayrafian, Vladimir V. Marbukh, Hamid Mahboubi, Ahmadreza Momeni, Amir G. Aghdam

This paper is concerned with target tracking using a network of collaborative sensors. The objective is to compute (online) the desired sensing and communication radii of sensors as well as their location at each time instant, such that a set of prescribed

Statistical Modeling of Harvestable Kinetic Energy for Wearable Medical Sensors

June 15, 2010

Author(s)

Nathalie Yarkony, Kamran Sayrafian, Antonio Possolo

Energy Harvesting (EH) refers to the process of capturing and storing energy from external sources or ambient environment. Kinetic energy harvested from the human body motion seems to be one of the most convenient and attractive solution for wearable

A Low Complexity Interference Cancellation Technique for Multi-User DS-CDMA Communications

May 27, 2010

Author(s)

Wen-Bin Yang, Kamran Sayrafian

A low complexity Parallel Interference Cancellation (PIC) technique is proposed to suppress Multi-Access Interference (MAI) and minimize near-far effect for multi-user communication using Direct-Sequence Code Division Multiple Access (DS-CDMA)

Self-Deployment Algorithms for Coverage Problem in a Network of Mobile Sensors with Unidentical Sensing Range

December 6, 2009

Author(s)

Vladimir V. Marbukh, Kamran Sayrafian, Hamid Mahboubi, Kaveh Moezzi, Amir G. Aghdam

In this paper, efficient sensor deployment algorithms are proposed to improve the coverage area in the target field. The proposed algorithms calculate the position of the sensors iteratively based on the existing coverage holes in the target field. The

Simulation Study of Body Surface RF Propagation for UWB Wearable Medical Sensors

November 17, 2009

Author(s)

Kamran Sayrafian, Wen-Bin Yang

Ultra Wide-Band (UWB) is a favorable technology for wearable medical sensors that monitor vital signs and other health-related information. Efficient transceiver design requires in-depth understanding of the propagation media which in this case is the

A Statistical Path Loss Model for Medical Implant Communication Channels

September 16, 2009

Author(s)

Kamran Sayrafian, Wen-Bin Yang, John G. Hagedorn, Judith E. Terrill, Kamya Yazdandoost

Knowledge of the propagation media is a key step toward a successful transceiver design. Such information is typically gathered by conducting physical experiments, measuring and processing the corresponding data to obtain channel characteristics. In case

Mobile Sensor Networks Self-organization for System Utility Maximization: Work in Progress

August 23, 2009

Author(s)

Vladimir V. Marbukh, Kamran Sayrafian

This paper reports on work in progress on mobile sensor network self-organization for system utility maximization with system utility being the difference between the aggregate utility of sensor information and penalty associated with sensor battery energy

A Framework for Joint Cross-Layer and Node Location Optimization in Mobile Sensor Networks

September 10, 2008

Author(s)

Vladimir V. Marbukh, Kamran Sayrafian

This paper proposes an extension to Network Utility Maximization (NUM) framework, referred to as L-NUM (Location-aware NUM). This framework is intended to characterize both, the amount of the received sensor information and the network ability to deliver