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International Journal of Digital Multimedia Broadcasting
Volume 2008, Article ID 509171, 7 pages
http://dx.doi.org/10.1155/2008/509171
Research Article

Block Iterative/Adaptive Frequency-Domain Channel Estimation for Cyclic-Prefixed Single-Carrier Broadband Wireless Systems

1Channel Laboratory, Samsung Electronics Co. Ltd., Suwon 443-742, South Korea
2Department of Electrical and Electronic Engineering, Yonsei University, Seoul 120-749, South Korea

Received 27 April 2008; Revised 13 July 2008; Accepted 11 September 2008

Academic Editor: Fred Daneshgaran

Copyright © 2008 Jong-Seob Baek and Jong-Soo Seo. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper presents a new block iterative/adaptive frequency-domain channel estimation scheme, in which a channel frequency response (CFR) is estimated iteratively by the proposed weighted element-wise block adaptive frequency-domain channel estimation (WEB-CE) scheme using the soft information obtained by a soft-input soft-output (SISO) decoder. In the WEB-CE, an equalizer coefficient is calculated by minimizing a weighted conditional squared-norm of the a posteriori error vector with respect to its correction term. Simulation results verify the superiority of the WEB-CE in a time-varying typical urban (TU) channel.