Paper Info
Title
A Multi-Band Timing Estimation and Compensation Scheme for Ultra-Wideband Communications
Abstract
An Ultra-Wideband (UWB) channel exhibits frequency dependent delay characteristics in different bands of transmission. In [6] we studied and quantified the differences of delay parameters over frequency bands 3.1-4.6GHz in several UWB channel models (CM). Based on this observation, we proposed an adaptive timing synchronization scheme (ATS) which estimates and maintains the timing delays of each band separately. In this paper, we modify our ATS algorithm [6] by optimal selection of the threshold for timing estimation to reduce the mean-squared-error (MSE) and increase the synchronization probability of the estimator. The performance of UWB Multi-band OFDM (MB-OFDM) system with modified ATS algorithm is studied through computer simulations. We show that modified ATS gives signal-to-noise ratio (SNR) improvement of 1.7 dB at Bit Error Rate (BER) of 2x10(-2), 2.2 dB at BER of 7x10(-3), and 1.1 dB at BER of 5x10(-3) for CM4, CM3, and CM2 respectively for uncoded MB-OFDM system over a non-adaptive synchronization scheme [5]. Also, algorithmic computational complexity analysis of modified ATS is provided for its usability evaluation.
Year
DOI
Venue
2008
10.1109/GLOCOM.2008.ECP.754
IEEE Global Telecommunications Conference (Globecom)
Keywords
Field
DocType
MB-OFDM,synchronization,UWB
Synchronization,Computer science,Mean squared error,Communication channel,Real-time computing,Ultra-wideband,Radio spectrum,Orthogonal frequency-division multiplexing,Bit error rate,Estimator
Conference
ISSN
Citations 
PageRank 
1930-529X
5
0.58
References 
Authors
8
3
Name
Order
Citations
PageRank
Debarati Sen111619.01
Saswat Chakrabarti216422.77
R V. Raja Kumar33910.24