Download OFDM PDF

Tags Electrical Engineering Modulation Wireless Lan Orthogonal Frequency Division Multiplexing
File Size478.0 KB
Total Pages78
Table of Contents
Modeling Wireless Channels
	Basic Characteristics of Mobile Radio Channels
	Microscopic or Small Scale Fading
		Doppler Spread: Time Selective Fading
		Delay spread: Frequency Selective Fading
	Tapped Delay Line Model for Frequency Selective Fading Channels
Baseband OFDM System
	Introduction to OFDM
	Discrete Baseband Block Transmissions
	Discrete-Time OFDM Model
Carrier Frequency Offset
	Carrier Synchronization Error
	Frequency Offset Estimation
		Frequency Domain Autocorrelation
		Maximum Likelihood Estimation
	ICI Cancelation Schemes
		Self-ICI Cancelation Scheme
Peak to Average Power Ratio
	Problem Formulation
	PAPR Mitigation Methods
		Signal Distortion Techniques
		Coding and Scrambling
Simulation of the Performance of OFDM Systems
	Performance of an OFDM System
		The Basic OFDM System
		Carrier Frequency Offset
		PAPR Simulations
Authors' Biographies
Document Text Contents
Page 1

OFDM Systems
for Wireless Communications

Page 39


bands, leading to the addition of spurious bits and causing a loss in SNR. Thus, the choice of
canceling scheme leads to a trade-off between data rate and SNR, which is dictated by the system
design [43].

Page 77


Authors’ Biographies

Adarsh Narasimhamurthy is a Ph.D. candidate at the School of Electrical, Computer and Energy
Engineering in Arizona State University, Tempe. He obtained his B.E. with distinction in 2005
from the Bangalore University, Karnataka, India and the M.S. degree in Electrical Engineering
from Arizona State University, Tempe in 2007. Currently, he is a part of the Signal Processing for
Wireless Communications Lab headed by Dr. Cihan Tepedelenlioğlu and also a member of the
SenSIP consortium.

Mr. Narasimhamurthy was awarded a Research Assistantship in the year 2006 and the subse-
quent year a Graduate Teaching Associate position from the Department of Electrical Engineering.
His research interests include MIMO systems, OFDM systems, reduced complexity diversity com-
bining techniques and multiuser communication. Mr. Narasimhamurthy is also a member of the Eta
Kappa Nu honor society and an IEEE student member.

Mahesh K. Banavar received the B.E. degree in telecommunications engineering from Visvesvaraya
Technological University, Karnataka, India, in 2005 and the M.S. degree in electrical engineering
from Arizona State University,Tempe, in 2008. He is pursuing the Ph.D. degree with Arizona State
University, specializing in Signal Processing and Communications, and doing research in wireless
communications and sensor networks.

Mr. Banavar is a member of the Eta Kappa Nu electrical and computer engineering honor

CihanTepedelenlioğlu was born in Ankara,Turkey in 1973.He received his with highest
honors from Florida Institute of Technology in 1995, and his M.S. degree from the University of
Virginia in 1998, both in Electrical Engineering. From January 1999 to May 2001 he was a research
assistant at the University of Minnesota, where he completed his Ph.D. degree in Electrical and
Computer Engineering. He is currently an Associate Professor of Electrical Engineering at Arizona
State University. He was awarded the NSF (early) Career grant in 2001, and has served as an
Associate Editor for several IEEE Transactions including IEEE Transactions on Communications,
and IEEE Signals Processing Letters.

Page 78


His research interests include statistical signal processing, system identification, wireless com-
munications, estimation and equalization algorithms for wireless systems, multi-antenna commu-
nications, filterbanks and multirate systems, OFDM, ultra-wideband systems, distributed detection
and estimation.

Similer Documents