Investigative Study on Frame Synchronization for TDMA Data Link Design

Bibliographic Details
Main Author:	Sapru, Arun
Language:	English
Published:	University of Toledo / OhioLINK 2010
Subjects:	Electrical Engineering TDMA Frame Synchronization Initial Acquisition Unique-Word Detection
Online Access:	http://rave.ohiolink.edu/etdc/view?acc_num=toledo1279298966

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spelling	ndltd-OhioLink-oai-etd.ohiolink.edu-toledo12792989662021-08-03T06:07:48Z Investigative Study on Frame Synchronization for TDMA Data Link Design Sapru, Arun Electrical Engineering TDMA Frame Synchronization Initial Acquisition Unique-Word Detection <p>Rapid advancements in wireless technology and evolution of a broad spectrum of applications have created a need to develop techniques and algorithms for precise operation of a satellite communication link. This necessitates an investigation of various components involved in a satellite communication. For e.g., channel sharing, data structure, signal specifications, transmitter and receiver processing, etc. are some of the areas in which a research can focus on. Since Time Division Multiple Access (TDMA) is one of the most common multiple access techniques utilized in satellite communication, this thesis focuses on the investigation of some of the critical network management and control processes pertaining to TDMA environment. As the name implies, a TDMA network allows multiple transmitting stations to access the channel by allocating each one of them different time slots. In other words, multiple earth stations can transmit data intermittently on the same frequency, due to which special steps have to be taken in order to avoid interference among data transmitted by different stations. This is in addition to the Quality of Service (QoS) demands from the network. These requirements have created a critical importance for the development of efficient acquisition and synchronization algorithms. Moreover, the pace at which new applications based on satellite communications are being developed has resulted in rapid changes in satellite technology as well, which in turn has imposed additional constraints on acquisition and synchronization algorithms. This thesis is an investigative study on some of the techniques involved in accomplishing frame acquisition and synchronization. </p><p>Data in TDMA communication is formatted in the form of frames which comprises traffic information, in the form of bursts, from all participating earth stations in a network. In addition to traffic data, each burst is prefixed with a preamble that aids frame synchronization as well as carrier synchronization. This thesis focuses on different types of bursts and the role of preamble, Unique Word (UW) in particular, for attaining frame acquisition and synchronization. Most of the widely used algorithms for frame synchronization are based on conventional correlation or maximum likelihood (ML) estimators for the detection of UW. This research is an analysis of the impact of format and length of UW, different types of bursts, on the performance of different synchronization techniques. We have considered PN sequences, Barker codes, Neuman-Hofman codes for studying the performance of correlation detectors and ML estimators, for a QPSK based TDMA system. In addition, ML decision rules that take into consideration the structural properties of a burst structure to estimate the location of UW were analyzed.</p><p>Results show that Barker code of length 13 QPSK symbols produces the best estimate for achieving synchronization, followed by Neuman-Hofman code. Among the different synchronization techniques analyzed the ML estimators delivered the best results in the presence of high frequency and phase offsets. In addition, the structural properties of different types of bursts have an impact on the performance of the decision rules for detecting the UW.</p> 2010-09-13 English text University of Toledo / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=toledo1279298966 http://rave.ohiolink.edu/etdc/view?acc_num=toledo1279298966 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection	NDLTD
language	English
sources	NDLTD
topic	Electrical Engineering TDMA Frame Synchronization Initial Acquisition Unique-Word Detection
spellingShingle	Electrical Engineering TDMA Frame Synchronization Initial Acquisition Unique-Word Detection Sapru, Arun Investigative Study on Frame Synchronization for TDMA Data Link Design
author	Sapru, Arun
author_facet	Sapru, Arun
author_sort	Sapru, Arun
title	Investigative Study on Frame Synchronization for TDMA Data Link Design
title_short	Investigative Study on Frame Synchronization for TDMA Data Link Design
title_full	Investigative Study on Frame Synchronization for TDMA Data Link Design
title_fullStr	Investigative Study on Frame Synchronization for TDMA Data Link Design
title_full_unstemmed	Investigative Study on Frame Synchronization for TDMA Data Link Design
title_sort	investigative study on frame synchronization for tdma data link design
publisher	University of Toledo / OhioLINK
publishDate	2010
url	http://rave.ohiolink.edu/etdc/view?acc_num=toledo1279298966
work_keys_str_mv	AT sapruarun investigativestudyonframesynchronizationfortdmadatalinkdesign
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Investigative Study on Frame Synchronization for TDMA Data Link Design

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