Distributed Estimation (Wireless Sensor Network) Research Papers (original) (raw)

The nanosatellites typically use either magnetic rods or coil to generate magnetic moment which consequently interacts with the earth magnetic field to generate torque. In this research, we present a novel design which integrates printed... more

The nanosatellites typically use either magnetic rods or coil to generate magnetic moment which consequently interacts with the earth magnetic field to generate torque. In this research, we present a novel design which integrates printed embedded coils, compact coils and magnetic rods in a single package which is also complaint with 1U CubeSat. These options provide maximum flexibility, redundancy and scalability in the design. The printed coils consume no extra space because the copper traces are printed in the internal layers of the printed circuit board (PCB). Moreover, they can be made reconfigurable by printing them into certain layers of the PCB, allowing the user to select any combination of series and parallel coils for optimized design. The compact coil is wound around the available space in a 1U complaint CubeSat panel and it can accommodate much more number of turns compared to printed coil; consequently generating more torque. The magnetic rod is made complaint with the ...

This work proposes the development of a robot to perform appropriate tasks to assist low income older adults based on the merging of two previous studies, one which focused on task investigation and deployment of mobile robots in elder... more

This work proposes the development of a robot to perform appropriate tasks to assist low income older adults based on the merging of two previous studies, one which focused on task investigation and deployment of mobile robots in elder care facilities and the other on design investigation for a socially assistive robot using low-cost and modular hardware and software design. We identified that hydration, walking and socialization were tasks appropriate for the robot and most impactful to the older adults. Another outcome was the level of importance of the HRI component in the implementation of these tasks, thus merging both studies to initially investigate preferences in service robots for elder care is proposed.

In a multi-robot system consisting of numerous agents, it may be impractical to individually identify each agent. Consequently, issuing specific commands to each agent might not be feasible. We therefore, introduce the concept of a... more

In a multi-robot system consisting of numerous agents, it may be impractical to individually identify each agent. Consequently, issuing specific commands to each agent might not be feasible. We therefore, introduce the concept of a Statistical multi-robot system (SMRS). Such systems comprises a very large number of agents that cannot be identified or located individually. Moreover, Since it is impractical to track and communicate the complete configuration of an SMRS, we resort to statistical physics methods, specifically gas kinetic knowledge, to extract their distribution. But unlike in Thermodynamics, we employ the fact robotic agents can sense their environment, communicate their microscopic state, and change their local behavior to enable control. The concept of an SMRS suggests that the comprising agents should be as simple as possible, for practical reasons. In this study, we demonstrate how an SMRS comprised of single-degree-of-freedom agents can be controlled by a global controller. Using the same rationale, we define a successful mission of an SMRS as one in which a sufficient portion of the agents accomplish the mission. To demonstrate the efficacy of our approach, we provide a motion planner and exemplify our formalism in both simulations and real-world experiments.

The ability to blend diverse sensors in close proximity promises to usher in a new generation of electronic skins that hold the potential for revolutionary applications.

This paper enlightens security features of WSNs (Wireless Sensor Networks) in terms of data confidentiality, data authentication and data integrity. The optimized security protocol has been designed to fulfil utmost prerequisite security... more

This paper enlightens security features of WSNs (Wireless Sensor Networks) in terms of data confidentiality, data authentication and data integrity. The optimized security protocol has been designed to fulfil utmost prerequisite security features for WSNs. Efforts have been made not only to make secure protocol but energy efficient too. The Optimized Security Protocol (OSP) techniques are constituted to abide security requirements for message confidentiality, message authentication and message integrity. Further, proposed OSP design intends a solution that is secure as well as energy efficient. The Rabbit stream cipher has been the main focus for confidentiality provided by our OSP design. Also Rabbit based MAC function is being used extensively for the purpose.

In wireless sensor networks, geographic adaptive fidelity (GAF) is one of the most popular energy-aware routing protocols. It conserves energy by identifying equivalence between sensors from a routing perspective and then turning off... more

In wireless sensor networks, geographic adaptive fidelity (GAF) is one of the most popular energy-aware routing protocols. It conserves energy by identifying equivalence between sensors from a routing perspective and then turning off unnecessary sensors, while maintaining the connectivity of the network. Nevertheless, the traditional GAF still cannot reach the optimum energy usage since it needs more number of hops to transmit data packets to the sink. As a result, it also leads to higher packet delay. In this paper, we propose a modified version of GAF to minimize hop count for data routing, called two-level GAF (T-GAF). Furthermore, we use a generalized version of GAF called Diagonal-GAF (DGAF) where two diagonal adjacent grids can also directly communicate. It has an advantage of less overhead of coordinator election based on the residual energy of sensors. Analysis and simulation results show significant improvements of the proposed work comparing to traditional GAF in the aspec...

The property of scalability for a given system indicates the ability of a system or a subsystem to be modified with changing load on the system. For a sufficiently large complex system, there are several factors that influence the ability... more

The property of scalability for a given system indicates the ability of a system or a subsystem to be modified with changing load on the system. For a sufficiently large complex system, there are several factors that influence the ability of the system to scale. It is necessary to incorporate solutions to these factors (or bottlenecks) in the design for scalability of a given system. In this paper, we discuss such design principles to handle the key factors that influence the scalability of large complex systems. Specifically, we demonstrate design and implementation of simple, innovative, and relatively less expensive methodology to guarantee that a large complex system (such as network of sensors) is scalable under varying load conditions.

A network of distributed acoustic sensor systems on the ground and/or in the air can be used effectively for autonomous and remote intelligence, surveillance, and reconnaissance (ISR) applications. However interoperability of disparate... more

A network of distributed acoustic sensor systems on the ground and/or in the air can be used effectively for autonomous and remote intelligence, surveillance, and reconnaissance (ISR) applications. However interoperability of disparate sensor systems is a major challenge for current coalition force applications. Specifically, a network of acoustic sensor nodes can exhibit heterogeneity in a variety of dimensions. At the sensor-level, the acoustic sensors can vary in their types (e.g., cardioid vs. omni-direction) and in their responsiveness to transient and continuous sources. At the node-level, the acoustic systems can vary in their array configuration, platform mobility, node reactiveness (e.g., timeliness of response), and information processing and output. At the network-level, the acoustic systems can vary in their communication protocols and access mediums. Current R&D efforts within the US-UK International Technology Alliance seek to develop a "sensor fabric" techno...

Change in patients requirements has lead to new cochlear implants architecture specifications. In t his paper, we proposed the receiver chain architecture study and design for new type of cochlear implants. Two receiver archite ctures... more

Change in patients requirements has lead to new cochlear implants architecture specifications. In t his paper, we proposed the receiver chain architecture study and design for new type of cochlear implants. Two receiver archite ctures were compared in terms of power consumption and Noise Fi gure, both of fundamental importance in biomedical embedd ed systems. SPICE simulations of the these architectur es were carried out and transient results were presented fo r the solution retained. Furthermore optimization of the Low Noise Amplifier (LNA) using mathematical computations is presented, increasing the entire receiver performances.

Publication in the conference proceedings of EUSIPCO, Florence, Italy, 2006