On Asymptotic Performance of Iterative Channel and Data Estimation in Large DS-CDMA Systems

Mikko Vehkaperä; Keigo Takeuchi; Ralf Müller; Toshiyuki Tanaka

2nd International Workshop on Physics-Inspired Paradigms in Wireless Communications and Networks

Research Article

On Asymptotic Performance of Iterative Channel and Data Estimation in Large DS-CDMA Systems

Cite: BibTeX Plain Text

@INPROCEEDINGS{10.1109/WIOPT.2009.5291596,
    author={Mikko Vehkaper\aa{} and Keigo Takeuchi and Ralf M\'{y}ller and Toshiyuki Tanaka},
    title={On Asymptotic Performance of Iterative Channel and Data Estimation in Large DS-CDMA Systems},
    proceedings={2nd International Workshop on Physics-Inspired Paradigms in  Wireless Communications and Networks},
    publisher={IEEE},
    proceedings_a={PHYSCOMNET},
    year={2009},
    month={10},
    keywords={},
    doi={10.1109/WIOPT.2009.5291596}
}

Mikko Vehkaperä
Keigo Takeuchi
Ralf Müller
Toshiyuki Tanaka
Year: 2009
On Asymptotic Performance of Iterative Channel and Data Estimation in Large DS-CDMA Systems
PHYSCOMNET
IEEE
DOI: 10.1109/WIOPT.2009.5291596

Mikko Vehkaperä¹^,*, Keigo Takeuchi²^,*, Ralf Müller¹^,*, Toshiyuki Tanaka³^,*

1: Depart. of Electr. and Telecomm., Norwegian University of Science and Technology, NO-7491 Trondheim, Norway.
2: Depart. of Inform. and Commun. Engineering, University of Electro-Communications, Tokyo 182-8585, Japan.
3: Graduate School of Informatics, Kyoto University, Kyoto 606-8501, Japan.

*Contact email: mikko@iet.ntnu.no, takeuchi@ice.uec.ac.jp, ralf@iet.ntnu.no, tt@i.kyoto-u.ac.jp

Abstract

We study the spectral efficiency of large random direct-sequence code-division multiple-access systems utilizing linear minimum mean square error (LMMSE) channel estimation and iterative multiuser detection and decoding (MUDD). The iterative MUDD based on non-linear data estimation and single-user decoding is considered as a benchmark for the more practical iterative LMMSE data estimator with soft parallel interference cancellation. The results showed that the channel parameters and the choice of error correction code have a great impact on the achievable spectral efficiency. It was also found that for the considered setups, the iterative LMMSE based channel estimator is near optimal for slowly time-varying multipath fading channels.

Published: 2009-10-23
Publisher: IEEE
Modified: 2010-05-16

: http://dx.doi.org/10.1109/WIOPT.2009.5291596