International Journal of Digital Multimedia Broadcasting 
Volume 2008 (2008), Article ID 509171, 7 pages
doi:10.1155/2008/509171
Research Article

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

Jong-Seob Baek1 and Jong-Soo Seo2

 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

Recommended by Fred Daneshgaran

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.