A New Signaling Scheme for Large DS-CDMA Channels without CSI

Keigo Takeuchi; Ralf Müller; Mikko Vehkaperä; Toshiyuki Tanaka

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

Research Article

A New Signaling Scheme for Large DS-CDMA Channels without CSI

Cite: BibTeX Plain Text

@INPROCEEDINGS{10.1109/WIOPT.2009.5291595,
    author={Keigo Takeuchi and Ralf M\'{y}ller and Mikko Vehkaper\aa{} and Toshiyuki Tanaka},
    title={A New Signaling Scheme for Large DS-CDMA Channels without CSI},
    proceedings={2nd International Workshop on Physics-Inspired Paradigms in  Wireless Communications and Networks},
    publisher={IEEE},
    proceedings_a={PHYSCOMNET},
    year={2009},
    month={10},
    keywords={DS-CDMA channel estimation replica method},
    doi={10.1109/WIOPT.2009.5291595}
}

Keigo Takeuchi
Ralf Müller
Mikko Vehkaperä
Toshiyuki Tanaka
Year: 2009
A New Signaling Scheme for Large DS-CDMA Channels without CSI
PHYSCOMNET
IEEE
DOI: 10.1109/WIOPT.2009.5291595

Keigo Takeuchi¹^,*, Ralf Müller²^,*, Mikko Vehkaperä²^,*, Toshiyuki Tanaka³^,*

1: Dept Information & Communication Engineering, the University of Electro-Communications, Tokyo 182-8585, Japan
2: Dept Elec. & Telecommun., Norwegian University of Science and Technology, NO–7491 Trondheim, Norway
3: Graduate School of Informatics, Kyoto University, Kyoto 606–8501, Japan

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

Abstract

We propose a novel signaling scheme for wireless communication systems without channel state information (CSI). In that scheme, a bias of the occurrence probabilities of constellation points is utilized as pilot information known to the receiver, whereas pilot signals known to the receiver are sent in conventional pilot-based approaches. We evaluate the performance of the new scheme and conventional pilot-based schemes for a large direct-sequence code-division multiple-access (DS-CDMA) system, by using the replica method. It is shown that the new scheme outperforms the conventional pilot-based scheme when the amount of pilot information is large.

Keywords: DS-CDMA channel estimation replica method

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

: http://dx.doi.org/10.1109/WIOPT.2009.5291595