EM based MAP iterative channel estimation for turbo coded SFBC-OFDM systems

Hakan Dogan, Hakan A. Çırpan, Erdal Panayırcı

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

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.

Original languageEnglish
Title of host publicationTURBO - CODING 2006 - 4th International Symposium on Turbo Codes and Related Topics and 6th International ITG-Conference on Source and Channel Coding
PublisherVDE Verlag GmbH
ISBN (Electronic)3800729474, 9783800729470
Publication statusPublished - 2006
Externally publishedYes
Event4th International Symposium on Turbo Codes and Related Topics and 6th International ITG-Conference on Source and Channel Coding, TURBOCODING 2006 - Munich, Germany
Duration: 3 Apr 20067 Apr 2006

Publication series

NameTURBO - CODING 2006 - 4th International Symposium on Turbo Codes and Related Topics and 6th International ITG-Conference on Source and Channel Coding

Conference

Conference4th International Symposium on Turbo Codes and Related Topics and 6th International ITG-Conference on Source and Channel Coding, TURBOCODING 2006
Country/TerritoryGermany
CityMunich
Period3/04/067/04/06

Bibliographical note

Publisher Copyright:
© 2020 TURBO - CODING 2006 - 4th International Symposium on Turbo Codes and Related Topics and 6th International ITG-Conference on Source and Channel Coding. All rights reserved.

Funding

This research has been conducted within the NEWCOM Network of Excellence in Wireless Communications funded through the EC 6th Framework Programme. This work was also supported in part by the Turkish Scientific and Technical Research Institute (TUBITAK) under Grant 104E166.

FundersFunder number
TUBITAK104E166
Turkish Scientific and Technical Research Institute
Sixth Framework Programme

    Fingerprint

    Dive into the research topics of 'EM based MAP iterative channel estimation for turbo coded SFBC-OFDM systems'. Together they form a unique fingerprint.

    Cite this