Open Access

Iterative Pilot-Layer Aided Channel Estimation with Emphasis on Interleave-Division Multiple Access Systems

EURASIP Journal on Advances in Signal Processing20062006:081729

https://doi.org/10.1155/ASP/2006/81729

Received: 1 June 2005

Accepted: 4 June 2006

Published: 27 August 2006

Abstract

Channel estimation schemes suitable for interleave-division multiple access (IDMA) systems are presented. Training and data are superimposed. Training-based and semiblind linear channel estimators are derived and their performance is discussed and compared. Monte Carlo simulation results are presented showing that the derived channel estimators in conjunction with a superimposed pilot sequence and chip-by-chip processing are able to track fast-fading frequency-selective channels. As opposed to conventional channel estimation techniques, the BER performance even improves with increasing Doppler spread for typical system parameters. An error performance close to the case of perfect channel knowledge can be achieved with high power efficiency.

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Authors’ Affiliations

(1)
Information and Coding Theory Lab, Faculty of Engineering, University of Kiel

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Copyright

© H. Schoeneich and P. A. Hoeher. 2006

This article is published under license to BioMed Central Ltd. 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.