Energy-Efficient Collaborative Communications for Wireless Sensor Networks
type: CreativeWork
description: In this thesis an energy efficient collaborative communication system for wireless sensor networks is presented in order to reduce the energy consumption of wireless sensor networks in the presence of AWGN and Rayleigh fading without decreasing the quality of service of data transmission. Due to the reduction of energy consumption of wireless sensor networks, the life time of sensor networks is extended. In collaborative communications, a set of transmitter nodes transmits the same data at the same time towards a common receiver, denoted as the base station, where the received signals are combined coherently. A coherently combined signal at the receiver indicates that a large amount of transmitted power is combined; this is referred to as constructive interference. As a result of this constructive interference, collaborative communications produce a substantial power gain, as well as a considerable reduction in bit error rate and a significant gain in capacity. The main focus in this thesis is on theoretical aspects of the development of a collaborative communication system. The key factors that degrade the performance of collaborative communication systems i.e., phase, frequency and time synchronization errors, are identified. A synchronization process is designed to reduce the phase and frequency synchronization errors among the collaborative nodes and the base station. The theoretical model of the collaborative communication system with imperfect phase and frequency synchronization in the presence of AWGN and Rayleigh fading is proposed, modelled, theoretically analyzed and simulated. The performance of collaborative communication system is evaluated by investigating several figures of merit. The considered figures of merit are received power, bit error rate, energy efficiency and channel capacity. The theoretical findings of the collaborative communication system are verified using Monte Carlo simulation by considering the parameters of off-the-shelf products i.…
abstract: In this thesis an energy efficient collaborative communication system for wireless sensor networks is presented in order to reduce the energy consumption of wireless sensor networks in the presence of AWGN and Rayleigh fading without decreasing the quality of service of data transmission. Due to the reduction of energy consumption of wireless sensor networks, the life time of sensor networks is extended. In collaborative communications, a set of transmitter nodes transmits the same data at the same time towards a common receiver, denoted as the base station, where the received signals are combined coherently. A coherently combined signal at the receiver indicates that a large amount of transmitted power is combined; this is referred to as constructive interference. As a result of this constructive interference, collaborative communications produce a substantial power gain, as well as a considerable reduction in bit error rate and a significant gain in capacity. The main focus in this thesis is on theoretical aspects of the development of a collaborative communication system. The key factors that degrade the performance of collaborative communication systems i.e., phase, frequency and time synchronization errors, are identified. A synchronization process is designed to reduce the phase and frequency synchronization errors among the collaborative nodes and the base station. The theoretical model of the collaborative communication system with imperfect phase and frequency synchronization in the presence of AWGN and Rayleigh fading is proposed, modelled, theoretically analyzed and simulated. The performance of collaborative communication system is evaluated by investigating several figures of merit. The considered figures of merit are received power, bit error rate, energy efficiency and channel capacity. The theoretical findings of the collaborative communication system are verified using Monte Carlo simulation by considering the parameters of off-the-shelf products i.…
author: Naqvi, Syed
license: https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm
date published: 2012
date modified: 2026-07-24T01:05:11Z
provider: University of Auckland
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: ResearchSpace@Auckland

PropertyValue
property ID: Handle
value: https://hdl.handle.net/2292/19794