On Channel Estimation in MB-OFDM UWB Systems with Time Varying Dispersive Fading Channel
Author(s)

S. M. Riazul Islam, Kyung Sup Kwak
Telecommunication Engineering Research Lab, Inha University, Incheon, 402-751, Korea
riazuldu@yahoo.com and kskwak@inha.ac.kr
doi: 10.4156/jdcta.vol4.issue2.2

Published in:

JDCTA (International Journal of Digital Content Technology and its Applications)
Volume 4 Issue 2, April, 2010
Pages 18-24
ISSN 1975-9339 (Print) 2233-9310 (Online)
GlobalCIS (Convergence Information Society, Republic of Korea)
Abstract

New channel estimation technique is proposed for multiband orthogonal frequecny division multiplexing (MB-OFDM) ultra wideband (UWB) systems in multipath time varying wireless channels. Two-stages approch has been used to achieve this purpose. In first stage, Winner-Hopf filtration has been employed for the interpolation of unknown channel state information (CSI) using comb-type known pilots. In second stage, interpolated channel statistics are then modeled as autoregressive (AR) process and fed into kalman filter. Moreover, inorder to suppress intercarrier interference (ICI), an ICI mitigation filter does joinly work with kalman filter. A mathematical framework is given for the ralization of our proposed system. Link level simulation (LLS) urgs that this new tecnique shows exact channel tarcking and provides better symbol error rate (SER) performance.
Keyword

MB-OFDM, UWB, Channel Estimation, Kalman Filter and Interpolation.

2010 Article
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