MODULATION-MODE ASSIGNMENT FOR SVD-ASSISTED AND ITERATIVELY DETECTED DOWNLINK MULTIUSER MIMO TRANSMISSION SCHEMES

Andreas Ahrens, César Benavente-Peces

2010

Abstract

In this contribution we jointly optimize the number of multiple-input multiple-output (MIMO) layers and the number of bits per symbol within an iteratively-detected multiuser MIMO downlink (DL) transmission scheme under the constraint of a given fixed data throughput and integrity. Instead of treating all the users jointly as in zero-forcing (ZF) multiuser transmission techniques, the investigated singular value decomposition (SVD) assisted DL multiuser MIMO system takes the individual user’s channel characteristics into account. In analogy to bit-interleaved coded irregular modulation, we introduce a MIMO-BICM scheme, where different user-specific signal constellations and mapping arrangement were used within a single codeword. Extrinsic information transfer (EXIT) charts are used for analyzing and optimizing the convergence behaviour of the iterative demapping and decoding. Our results show that in order to achieve the best bit-error rate, not necessarily all user-specific MIMO layers have to be activated.

References

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Paper Citation


in Harvard Style

Ahrens A. and Benavente-Peces C. (2010). MODULATION-MODE ASSIGNMENT FOR SVD-ASSISTED AND ITERATIVELY DETECTED DOWNLINK MULTIUSER MIMO TRANSMISSION SCHEMES . In Proceedings of the International Conference on Wireless Information Networks and Systems - Volume 1: WINSYS, (ICETE 2010) ISBN 978-989-8425-24-9, pages 107-114. DOI: 10.5220/0002894001070114


in Bibtex Style

@conference{winsys10,
author={Andreas Ahrens and César Benavente-Peces},
title={MODULATION-MODE ASSIGNMENT FOR SVD-ASSISTED AND ITERATIVELY DETECTED DOWNLINK MULTIUSER MIMO TRANSMISSION SCHEMES},
booktitle={Proceedings of the International Conference on Wireless Information Networks and Systems - Volume 1: WINSYS, (ICETE 2010)},
year={2010},
pages={107-114},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0002894001070114},
isbn={978-989-8425-24-9},
}


in EndNote Style

TY - CONF
JO - Proceedings of the International Conference on Wireless Information Networks and Systems - Volume 1: WINSYS, (ICETE 2010)
TI - MODULATION-MODE ASSIGNMENT FOR SVD-ASSISTED AND ITERATIVELY DETECTED DOWNLINK MULTIUSER MIMO TRANSMISSION SCHEMES
SN - 978-989-8425-24-9
AU - Ahrens A.
AU - Benavente-Peces C.
PY - 2010
SP - 107
EP - 114
DO - 10.5220/0002894001070114