Characteristics of WLAN Transmission in an Indoor Environment

This thesis describes the study of a deterministic model for WLAN system in indoor environment. The measurement system consists of a spectrum analyzer and a log-periodic antenna. A computer program has been developed to acquire measured field strength data from the spectrum analyzer by using Agilent...

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Main Author:	Cheng, Ee Meng
Format:	Thesis
Language:	English English
Published:	2006
Subjects:	Wireless LANs Extranets (Computer networks)
Online Access:	http://psasir.upm.edu.my/id/eprint/5397/1/IPM_2006_3.pdf
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id	my-upm-ir.5397
record_format	uketd_dc
spelling	my-upm-ir.53972013-05-27T07:22:32Z Characteristics of WLAN Transmission in an Indoor Environment 2006 Cheng, Ee Meng This thesis describes the study of a deterministic model for WLAN system in indoor environment. The measurement system consists of a spectrum analyzer and a log-periodic antenna. A computer program has been developed to acquire measured field strength data from the spectrum analyzer by using Agilent VEE and analyzed the data by using MATLAB software. Both line-of-sight (LOS) propagation (empty room or corridor) and non-line-of-sight (NLOS) propagation (furnished room) have been investigated. The measured path losses have been compared with deterministic model, namely Geometrical Optics (GO) and Uniform Theory of Diffraction (UTD) with the aid of image theory. The predicted results show good agreement with measurement data for the NLOS environment with absolute mean error ranging between 1.61 dB and 3.07 dB. However, the multiple reflections (third order of multiple reflections estimated the highest order in all cases) and direct ray condition which estimated significant in Instrumentation Laboratory (periodical structural ground) gave poor result when compared with the measured path losses. A typical mean relative error and absolute mean error of direct ray model was found to be within 55.04 % and 7.47 dB, but was further reduced to less than 7.43 % and 0.69 dB after optimization. Wireless LANs Extranets (Computer networks) 2006 Thesis http://psasir.upm.edu.my/id/eprint/5397/ http://psasir.upm.edu.my/id/eprint/5397/1/IPM_2006_3.pdf application/pdf en public masters Universiti Putra Malaysia Wireless LANs Extranets (Computer networks) Mathematical Research English
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English English
topic	Wireless LANs Extranets (Computer networks)
spellingShingle	Wireless LANs Extranets (Computer networks) Cheng, Ee Meng Characteristics of WLAN Transmission in an Indoor Environment
description	This thesis describes the study of a deterministic model for WLAN system in indoor environment. The measurement system consists of a spectrum analyzer and a log-periodic antenna. A computer program has been developed to acquire measured field strength data from the spectrum analyzer by using Agilent VEE and analyzed the data by using MATLAB software. Both line-of-sight (LOS) propagation (empty room or corridor) and non-line-of-sight (NLOS) propagation (furnished room) have been investigated. The measured path losses have been compared with deterministic model, namely Geometrical Optics (GO) and Uniform Theory of Diffraction (UTD) with the aid of image theory. The predicted results show good agreement with measurement data for the NLOS environment with absolute mean error ranging between 1.61 dB and 3.07 dB. However, the multiple reflections (third order of multiple reflections estimated the highest order in all cases) and direct ray condition which estimated significant in Instrumentation Laboratory (periodical structural ground) gave poor result when compared with the measured path losses. A typical mean relative error and absolute mean error of direct ray model was found to be within 55.04 % and 7.47 dB, but was further reduced to less than 7.43 % and 0.69 dB after optimization.
format	Thesis
qualification_level	Master's degree
author	Cheng, Ee Meng
author_facet	Cheng, Ee Meng
author_sort	Cheng, Ee Meng
title	Characteristics of WLAN Transmission in an Indoor Environment
title_short	Characteristics of WLAN Transmission in an Indoor Environment
title_full	Characteristics of WLAN Transmission in an Indoor Environment
title_fullStr	Characteristics of WLAN Transmission in an Indoor Environment
title_full_unstemmed	Characteristics of WLAN Transmission in an Indoor Environment
title_sort	characteristics of wlan transmission in an indoor environment
granting_institution	Universiti Putra Malaysia
granting_department	Mathematical Research
publishDate	2006
url	http://psasir.upm.edu.my/id/eprint/5397/1/IPM_2006_3.pdf
_version_	1747810415771910144

Characteristics of WLAN Transmission in an Indoor Environment

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