In this paper, we derive and analyze cooperative localization bounds for endoscopic wireless capsule as it passes through the human gastrointestin (GI) tract. We derive the Cramer-Rao lower bound (CRLB) variance limits on location estimators which use measured received signal strength(RSS) and ranging error limits using time of arrival (TOA). Using a three-dimension human body model from a full...

We study the problem of beamforming design for a Cognitive Radio (CR) system in which a multiple-input multipleoutput (MIMO) link, identified as secondary link, wants to opportunistically communicate without harming a licensed MIMO system, called primary. In the proposed solution the opportunistic user designs its beamformer in order to span the noise subspace at the primary receiver, thus inte...

This paper considers N mobile nodes that move together in the vicinity of each other, whose initial poses as well as subsequent movements must be accurately tracked in real time with the assist of M(≥ 3) reference nodes. By engaging the neighboring mobile nodes in a simple but effective cooperation, and by exploiting both the timeof-arrival (TOA) information (between mobile nodes and reference ...

The most important components of the cognitive radio concept is its ability to measure, sense and learn. One also should be aware of the parameters related to the radio channel characteristics and the availability of spectrum and power. In cognitive radio technology, primary users can be defined as the users who have the highest priority on the usage of a specific part of the spectrum. Secondar...

Distributed power delivery is blooming in SoC power system because the fine-grained power management needs separate power sources to adjust each voltage island dynamically. In addition, dedicated power sources for critical circuit blocks can achieve better signal integrity. To extensively utilize the power modules when they are redundant and idle, this work applies the cooperation concept in So...

SIGNAL is a synchronized data flow language designed for programming real-time systems. A SIGNAL program defines both data and control processing, from a system of equations, the variables of the system are signals. These equations can be organized as sub-systems (or processes). A signal is a sequence of values which has a clock associated with; this clock specifies the instants at which the va...

Title of dissertation: ALIGNMENT AND COOPERATION FOR SECRECY IN MULTI-USER CHANNELS Raef Bassily Doctor of Philosophy, 2011 Dissertation directed by: Professor Şennur Ulukuş Department of Electrical and Computer Engineering The study of the physical layer has offered a new perspective to the problem of communication security. This led to the development of a vast set of ideas and techniques roo...

Title of Dissertation: CROSS-LAYER DESIGN FOR COOPERATIVE COMMUNICATIONS AND NETWORKING Ahmed K. Sadek, Doctor of Philosophy, 2007 Dissertation directed by: Professor K. J. Ray Liu Department of Electrical and Computer Engineering Cooperative communications is a new communication paradigm in which different terminals in the wireless network share their antennas and resources for distributed tra...