Ici Cancellation in Ofdm System

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  • Topic: Modulation, Phase-shift keying, Quadrature amplitude modulation
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AN EFFICIENT ICI CANCELLATION TECHNIQUE FOR OFDM COMMUNICATION SYSTEMS

A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF

Master of Technology In Electronics System and Communication

By BRAHMAJI T.A.R.K.

Department of Electrical Engineering National Institute of Technology Rourkela 2009

AN EFFICIENT ICI CANCELLATION TECHNIQUE FOR OFDM COMMUNICATION SYSTEMS A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF

Master of Technology In Electronics System and Communication

By BRAHMAJI T.A.R.K.
Under the Guidance of

Prof. SUSMITA DAS

Department of Electrical Engineering National Institute of Technology Rourkela 2009

National Institute of Technology Rourkela

This

is

to

certify

that

the

thesis

entitled

“AN

EFFICIENT

ICI

CANCELLATION TECHNIQUE FOR OFDM COMMUNICATION SYSTEMS” submitted by BRAHMAJI T.A.R.K. in partial fulfillment of the requirements for the award of Master of Technology in the Department of Electrical Engineering, with specialization in ‘Electronics System and Communication’ at National Institute of Technology, Rourkela (Deemed University) is an authentic work carried out by him under my supervision and guidance. To the best of my knowledge, the matter embodied in this thesis has not been submitted to any other University/Institute for the award of any Degree or Diploma.

Date : Place :

PROF. SUSMITA DAS
SUPERVISOR

ACKNOWLEDGEMENTS
On the submission of my thesis report ―AN EFFICIENT ICI CANCELLATION TECHNIQUE FOR OFDM COMMUNICATION SYSTEMS‖, I would like to extend my gratitude & my sincere thanks to my supervisor Dr. SUSMITA DAS, Department of Electrical Engineering for her constant motivation and support during the course of my work in the last one year. I truly appreciate and value her esteemed guidance and encouragement from the beginning to the end of this thesis. I am indebted to her for having helped me to shape the problem and providing insights towards the solution.

I express my gratitude to Dr. B.D.SUBUDHI, Professor and Head of the Department, Electrical Engineering for his invaluable suggestions and constant encouragement all through the thesis work.

I also thank all the teaching and non-teaching staff for their nice cooperation to the students.

I would like to thank all whose direct and indirect support helped me completing my thesis in time.

This thesis would have been impossible if not for the perpetual moral support from my family members, and my friends. I would like to thank them all.

BRAHMAJI T.A.R.K. M. Tech (Electronics System and Communication)

CONTENTS
ABSTRACT LIST OF ACRONYMS LIST OF FIGURES LIST OF TABLES i iii v vi

1

INTRODUCTION 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Introduction History of Mobile Wireless Communications Generation of telecommunication Motivation Literature Survey Contribution Objective and Outline of Thesis

01 02 04 06 08 10 11 11 12 13 13 13 14 14 14 17 19 21 22 23 24 25 26 30 31 32

2

BASICS OF OFDM 2.1 2.2 Introduction Evolution of OFDM 2.2.1 2.2.2 2.2.3 2.3 2.4 2.5 Frequency Division Multiplexing (FDM) Multicarrier Communication (MC) Orthogonal Frequcny Division Multiplexing

Orthogonality Principle of OFDM Transmission Technology OFDM Generation and Reception 2.5.1 2.5.2 2.5.3 Signal Mapping Serial to Parallel Conversion and Parallel to Serial conversion Frequency to Time Domain Conversion

2.6 2.7 2.8 2.9 2.10 2.11

Intersymbol Interference and inter carrier interference Guard Period AWGN channel Advantages of OFDM Disadvantages of OFDM Applications of OFDM

3

DIGITAL MODULATION SCHEME AND RADIO PROPAGATION 3.1 3.2 3.3 3.4 3.5 3.6 Modulation Digital Modulation Phase Shift Keying (PSK) Binary phase-shift keying (BPSK) Quadrature phase-shift keying (QPSK) Radio Propagation 3.6.1 3.6.2 3.6.3 3.6.4 3.6.5 Attenuation Fading Effects Multipath Fading Delay Spread Doppler Shift

35 36 36 37 40 42 45 46 46...
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