|
Channel Estimation for Chaotic
Sequence based Communication Systems in a Multipath Environment
S.J. Thiruvengadam, M.S.K
Manikandan, A.R.Karthikeyan, S.Munivel
TIFAC CORE in Wireless Technologies,
Thiagarajar College of Engineering,
Madurai 625 015, India
Abstract
Chaos based
communication systems represent a new category of spread spectrum
communication systems, whose working principle differs significantly
from conventional direct sequence and frequency hopping spread spectrum
systems. Owing to the wideband nature of chaotic signals, the received
response has multiple reflections, imposing a multipath assumption on
the channel. The estimation of the channel parameters, namely
attenuation and delay incurred by signal echoes along the propagation
paths are to be carried out with maximum likelihood (ML) method, due to
its consistency. The performance of ML based channel estimation for
spread spectrum communication system is dependent on the correlation
properties of the spreading sequences. In case of chaos based
communication system, chaotic signals are used as the spreading
sequences. The attractive property of chaotic signal is that it is not
periodic and its evolution cannot be predicted for a long time interval,
which makes it suitable for secure communication. However, the
correlation property of chaotic signal is not well suited for applying
the ML method directly to estimate channel parameters. This paper
proposes a novel method to improve the accuracy of ML estimates of
channel parameters using correlation property of chaotic signal.
Keywords:
Chaos, Maximum Likelihood Method,
Multipath channel, Estimation
( Full
paper, 416 KB )
Biography:
 |
 S
J Thiruvengadam received his Bachelor's degree in
Electronics and Communication Engineering and Master's degree in
Applied Electronics from Thiagarajar College of Engineering,
Madurai, and College of Engineering, Anna University in 1991 and
1994 respectively. He received his PhD Degree from Madurai
Kamaraj University in 2005. Currently, he is associate professor
at Baseband Processing laboratory, TIFAC CORE in Wireless
Technologies at Thiagarajar College of Engineering, Madurai. His
research interests are signal processing for communications,
Ultrawideband Systems
|
 |
M S K Manikandan received his
Bachelor's degree in Electronics and Communication Engineering
and Master's degree in Communication system from National
Institute of Technology (NIT), Tiruchirappalli, and Thiagarajar
College of Engineering, Madurai, in 1998 and 2000 respectively.
Currently he is pursuing PhD and working as a Lecturer in
Thiagarajar College of Engineering, Madurai. His research
interests are signal processing for communications, Ultra
wideband Systems and wireless security
|
 |
A R Karthikeyan received his
Bachelor's degree in Electronics and Communication Engineering
and Master's degree in Wireless Technologies from Thiagarajar
College of Engineering, Madurai, India in 2002 and 2005
respectively. During his master’s, he worked as a project
associate in Baseband Laboratory, Thiagarajar Advanced Research
Centre, Thiagarajar College of Engineering, Madurai. He worked
as Senior Engineer in Research & Technology (Wireless) Division
of Honeywell Technology Solutions Lab, India from July 2005 to
July2006. He is currently a graduate student at Electrical
Engineering Department, Indian Institute of Technology, Madras.
His research interests are signal processing for communications,
nonlinear fiber optics. |
 |
 S.
Munivel received his Bachelor's degree in Electronics
and Communication Engineering and Master's degree in
Communication System from Priyadharshini College of Engineering,
Vaniampadi, and Thiagarajar College of Engineering, Madurai, in
1998 and 2001 respectively. Currently, he is at TIFAC CORE in
Wireless Technologies at Thiagarajar College of Engineering,
Madurai. His research interests are signal processing for
communications and radar signal processing.
|
BibTex:
@ARTICLE{P1180638001,
AUTHOR = {S.J. Thiruvengadam
and M.S.K Manikandan and A.R.Karthikeyan and S.Munivel},
TITLE ={Channel Estimation for Chaotic
Sequence based Communication Systems in a Multipath
Environment},
JOURNAL = {ICGST International
Journal on Digital Signal Processing, DSP},
YEAR ={2006},
VOLUME = {6},
ISSUE ={1},
PAGES = {65--70}
}
(Full
paper, 416 KB )
|
