Iterative channel estimation, detection, and decoding in large CDMA systems

Conference contribution
(Conference Contribution)


Publication Details

Author(s): Vehkaperä M, Takeuchi K, Müller R, Tanaka T
Publisher: IEEE
Publication year: 2010
Pages range: 16-23
ISBN: 9781424467457
ISSN: 2165-4719
Language: English


Abstract

The large system analysis of randomly spread direct-sequence code-division multiple-access systems operating over frequency-selective fading channels is considered. Iterative multiuser detection and decoding (MUDD) based on generalized posterior mean estimation and single-user sum-product decoding is assumed to be used at the receiver. The channel state information (CSI) at the MUDD is mismatched and obtained by a linear channel estimator whose initial decisions are iteratively refined with the help of information feedback provided by the MUDD. Furthermore, a new training method by means of probability-biased signaling is proposed. The results indicate that in the large system limit and under certain threshold loads, a near single-user performance with perfect CSI can be achieved using a vanishing training overhead. It is also found that for the considered setups, the iterative linear minimum mean square error based channel estimator is near optimal for relatively slowly time-varying multipath fading channels. © 2010 IEEE.


FAU Authors / FAU Editors

Müller, Ralf Prof. Dr.-Ing.
Professur für Informationsübertragung


External institutions with authors

Kyoto University / 京都大学 Kyōto daigaku
NTNU Trondheim - Norwegian University of Science and Technology
University of Electro-Communications / 電気通信大学 (Denki-Tsūshin Daigaku)


How to cite

APA:
Vehkaperä, M., Takeuchi, K., Müller, R., & Tanaka, T. (2010). Iterative channel estimation, detection, and decoding in large CDMA systems. In Proceedings of the 6th International Symposium on Turbo Codes and Iterative Information Processing, ISTC 2010 (pp. 16-23). Brest, France, FR: IEEE.

MLA:
Vehkaperä, Mikko, et al. "Iterative channel estimation, detection, and decoding in large CDMA systems." Proceedings of the 6th International Symposium on Turbo Codes and Iterative Information Processing, ISTC 2010, Brest, France IEEE, 2010. 16-23.

BibTeX: 

Last updated on 2019-09-07 at 11:08