Title page for ETD etd-0430104-121009

Document Type thesis

Author Name Alsindi, Nayef Ali

URN etd-0430104-121009

Title Performance of TOA Estimation Algorithms in Different Indoor Multipath Conditions

Degree MS

Department Electrical & Computer Engineering

Advisors
Professor Kaveh Pahlavan, Advisor
Professor Wenjing Lou, Committee Member
Professor Fred Looft, Department Head

Keywords
indoor radio propagation
time of arrival estimation
indoor geolocation
super-resolution algorithms

Date of Presentation/Defense 2004-04-26

Availability unrestricted

Abstract
Using Time of Arrival (TOA) as ranging metric is the most popular technique for accurate indoor positioning. Accuracy of measuring the distance using TOA is sensitive to the bandwidth of the system and the multipath condition between the wireless terminal and the access point.

In a telecommunication-specific application, the channel is divided into Line of Sight (LOS) and Obstructed Line of Sight (OLOS) based on the existence of physical obstruction between the transmitter and receiver. In indoor geolocation application, with extensive multipath conditions, the emphasis is placed on the behavior of the first path and the channel conditions are classified as Dominant Direct Path (DDP), Nondominant Direct Path (NDDP) and Undetected Direct Path (UDP). In general, as the bandwidth increases the distance measurement error decreases. However, for the so called UDP conditions the system exhibits substantially high distance measurement errors that can not be eliminated with the increase in the bandwidth of the system.

Based on existing measurements performed in CWINS, WPI a measurement database that contains adequate number of measurement samples of all the different classification is created. Comparative analysis of TOA estimation in different multipath conditions is carried out using the measurement database. The performance of super-resolution and traditional TOA estimation algorithms are then compared in LOS, OLOS DDP, NDDP and UDP conditions. Finally, the analysis of the effect of system bandwidth on the behavior of the TOA of the first path is presented.

Files
alsindi.pdf

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Document Type	thesis
Author Name	Alsindi, Nayef Ali
URN	etd-0430104-121009
Title	Performance of TOA Estimation Algorithms in Different Indoor Multipath Conditions
Degree	MS
Department	Electrical & Computer Engineering
Advisors	Professor Kaveh Pahlavan, Advisor Professor Wenjing Lou, Committee Member Professor Fred Looft, Department Head
Keywords	indoor radio propagation time of arrival estimation indoor geolocation super-resolution algorithms
Date of Presentation/Defense	2004-04-26
Availability	unrestricted
Abstract Using Time of Arrival (TOA) as ranging metric is the most popular technique for accurate indoor positioning. Accuracy of measuring the distance using TOA is sensitive to the bandwidth of the system and the multipath condition between the wireless terminal and the access point. In a telecommunication-specific application, the channel is divided into Line of Sight (LOS) and Obstructed Line of Sight (OLOS) based on the existence of physical obstruction between the transmitter and receiver. In indoor geolocation application, with extensive multipath conditions, the emphasis is placed on the behavior of the first path and the channel conditions are classified as Dominant Direct Path (DDP), Nondominant Direct Path (NDDP) and Undetected Direct Path (UDP). In general, as the bandwidth increases the distance measurement error decreases. However, for the so called UDP conditions the system exhibits substantially high distance measurement errors that can not be eliminated with the increase in the bandwidth of the system. Based on existing measurements performed in CWINS, WPI a measurement database that contains adequate number of measurement samples of all the different classification is created. Comparative analysis of TOA estimation in different multipath conditions is carried out using the measurement database. The performance of super-resolution and traditional TOA estimation algorithms are then compared in LOS, OLOS DDP, NDDP and UDP conditions. Finally, the analysis of the effect of system bandwidth on the behavior of the TOA of the first path is presented.
Files	alsindi.pdf