A Primer on Software Defined Radios

The commercial success of cellular phone systems during the late 1980s and early 1990 years heralded the wireless revolution that became apparent at the turn of the 21st century and has led the modern society to a highly interconnected world where ubiquitous connectivity and mobility are enabled by powerful wireless terminals. Software defined radio (SDR) technology has played a major role in accelerating the pace at which wireless capabilities have advanced, in particular over the past 15 years, and SDRs are now at the core of modern wireless communication systems. In this paper we give an overview of SDRs that includes a discussion of drivers and technologies that have contributed to their continuous advancement, and presents the theory needed to understand the architecture and operation of current SDRs. We also review the choices for SDR platforms and the programming options that are currently available for SDR research, development, and teaching, and present case studies illustrating SDR use. Our hope is that the paper will be useful as a reference to wireless researchers and developers working in the industry or in academic settings on further advancing and refining the capabilities of wireless systems

A Primer on Software Defined Radios

The commercial success of cellular phone systems during the late 1980s and early 1990 years heralded the wireless revolution that became apparent at the turn of the 21st century and has led the modern society to a highly interconnected world where ubiquitous connectivity and mobility are enabled by powerful wireless terminals. Software defined radio (SDR) technology has played a major role in accelerating the pace at which wireless capabilities have advanced, in particular over the past 15 years, and SDRs are now at the core of modern wireless communication systems. In this paper we give an overview of SDRs that includes a discussion of drivers and technologies that have contributed to their continuous advancement, and presents the theory needed to understand the architecture and operation of current SDRs. We also review the choices for SDR platforms and the programming options that are currently available for SDR research, development, and teaching, and present case studies illustrating SDR use. Our hope is that the paper will be useful as a reference to wireless researchers and developers working in the industry or in academic settings on further advancing and refining the capabilities of wireless systems

Multi-hop wireless sensor networks with mobile sink

Energy efficiency is a very important goal in wireless sensor networks. In order to achieve it, many recent solutions use mobile sinks that move either randomly or along a predefined path. In this paper we propose an adaptive mobility solution; the sink moves inside the sensor network according to the current events, so as to minimize the energy consumption incurred by the multi-hop transmission of the event-related data. Categories and Subject Descriptors C.2.1 [Computer-communication networks]: Network Architecture and Design – distributed networks, wireless communicatio

Protocol design for group and mobility management in a multicast environment

PARIS-BIUSJ-Thèses (751052125) / SudocPARIS-BIUSJ-Mathématiques rech (751052111) / SudocSudocFranceF

Mobile and Ambient Environments of the Future - Research Challenges for Wireless Ad-hoc and Sensor Networks

There are two important trends that seem to be the driving forces in the evolution of communication networks. On the one hand, mobility support becomes a "must" for emerging services and technologies. On the other hand, services tend to have a ubiquitous nature, they are based on intelligent devices being embedded in the ambient environment surroundig us. These new trends result in new research challenges as well. In this paper we first present the specificities of wireless ad-hoc and sensor networks, technologies that were developed to support these new requirements. Then, we highlight the most important and most challenging issues that arise from these specificities

Mobility and Multicast: Protocol Design and Analysis

International audienc