@inproceedings{5a620b4a73574652bd9e98e0d8e1fc16,
title = "EM based MAP iterative channel estimation for turbo coded SFBC-OFDM systems",
abstract = "We consider the design of turbo receiver structures for space-frequency block coded (SFBC-) OFDM systems in unknown frequency selective fading channels. The Turbo receiver structures for SFBC-OFDM systems under consideration consists of an iterative MAP Expectation/Maximization (EM) channel estimation algorithm, soft MMSE SFBC decoder and a soft MAP outer-channel-code decoder. MAP-EM employs iterative channel estimation and it improves receiver performance by re-estimating the channel after each decoder iteration. Moreover, the MAP-EM approach considers the channel variations as random processes and applies the Karhunen-Loeve (KL) orthogonal series expansion. The performance of the proposed approaches are studied in terms of mean square error and bit-error rate. Through experimental results, the effect of a pilot spacing on the channel estimator performance and sensitivity of turbo receiver structures on channel estimation error are studied.",
author = "Hakan Dogan and {\c C}irpan, \{Hakan A.\} and Erdal Panayirci",
year = "2006",
language = "English",
series = "Turbo Codes and Related Topics; 6th International ITG-Conference on Source and Channel Coding (TURBOCODING), 2006 4th International Symposium on",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "Turbo Codes and Related Topics; 6th International ITG-Conference on Source and Channel Coding (TURBOCODING), 2006 4th International Symposium on",
address = "United States",
note = "6th International ITG-Conference on Source and Channel Coding and 2006 4th International Symposium on Turbo Codes and Related Topics, TURBOCODING 2006 ; Conference date: 03-04-2006 Through 07-04-2006",
}