Title :
A Convergence Study of Iterative Channel Estimation Algorithms for OFDM Systems in Dispersive Time-Varying Channels
Author :
Du, Zheng ; Song, Xuegui ; Cheng, Julian ; Beaulieu, Norman C.
Abstract :
Maximum-likelihood based channel estimation is considered for orthogonal frequency division multiplexing systems in dispersive time-varying channels. A successive overrelaxation approach is adopted to analyze the convergence rate of an iterative channel estimation algorithm. Based on the analysis, an improved fast converging iterative channel estimation algorithm is proposed. Numerical tests are performed to show the improvement of the proposed algorithm over a recently proposed channel estimation algorithm.
Keywords :
OFDM modulation; channel estimation; convergence of numerical methods; dispersive channels; iterative methods; maximum likelihood estimation; time-varying channels; OFDM system; convergence rate; dispersive time-varying channel; iterative channel estimation algorithm; orthogonal frequency division multiplexing system; overrelaxation approach; Algorithm design and analysis; Channel estimation; Convergence; Dispersion; Iterative algorithms; Iterative methods; Maximum likelihood estimation; OFDM; Testing; Time-varying channels;
Conference_Titel :
Wireless Communications and Networking Conference, 2009. WCNC 2009. IEEE
Conference_Location :
Budapest
Print_ISBN :
978-1-4244-2947-9
Electronic_ISBN :
1525-3511
DOI :
10.1109/WCNC.2009.4917493
