Title :
Design and Analysis of Channel Estimation for Multi-Band OFDM-UWB Systems
Author :
Wang, Zhongjun ; Xin, Yan ; Tomisawa, Masayuki
Author_Institution :
Wipro Techno Centre, Singapore
Abstract :
This paper presents an efficient channel estimation scheme for multi-band orthogonal frequency division multiplexing based ultra-wideband communications. The scheme is based on a simple least-square (LS) algorithm, but enhanced with channel frequency response aided decision-directed detection as well as frequency-domain smoothing. The mean-squared error performance and computational complexity of the scheme are investigated. Numerical examples show that the proposed scheme significantly outperforms the conventional LS solutions and performs comparable to the maximum-likelihood solutions.
Keywords :
OFDM modulation; channel estimation; computational complexity; frequency-domain analysis; least squares approximations; maximum likelihood estimation; smoothing methods; ultra wideband communication; channel estimation; channel frequency response; decision-directed detection; frequency-domain smoothing; least-square algorithm; maximum-likelihood solutions; mean-squared error performance; multiband OFDM-UWB systems; ultrawideband communications; Channel estimation; Computational complexity; Frequency estimation; Frequency response; Maximum likelihood detection; Maximum likelihood estimation; OFDM; Payloads; Smoothing methods; Ultra wideband technology;
Conference_Titel :
Global Telecommunications Conference, 2008. IEEE GLOBECOM 2008. IEEE
Conference_Location :
New Orleans, LO
Print_ISBN :
978-1-4244-2324-8
DOI :
10.1109/GLOCOM.2008.ECP.851
