Replica analysis of general multiuser detection in MIMO DS-CDMA channels with imperfect CSI

Keigo Takeuchi; Mikko Vehkaperä; Toshiyuki Tanaka; Ralf R. Muller

doi:10.1109/ISIT.2008.4595039

Replica analysis of general multiuser detection in MIMO DS-CDMA channels with imperfect CSI

Keigo Takeuchi^*, Mikko Vehkaperä, Toshiyuki Tanaka, Ralf R. Muller

^*Corresponding author for this work

Not published at VTT

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

6 Citations (Scopus)

Abstract

We consider impacts of channel estimation errors on performance of general multiuser detectors in MIMO DS-CDMA channels. We evaluate their performance in terms of asymptotic spectral efficiency, which is obtained via decoupling structure, by using the replica method. Numerical results imply that the performance of LMMSE detection is very close to that of MMSE detection for small system loads. Furthermore, we find that the spectral efficiency of MMSE detection grows discontinuously with the length of pilot sequences for large system loads, and that the critical length is close to the optimal length. While it is indistinguishable from that of LMMSE detection for short pilot sequences, the gap between the two is significantly large if the length of pilot sequences is longer than the critical length.

Original language	English
Title of host publication	2008 IEEE International Symposium on Information Theory, ISIT 2008
Publisher	IEEE Institute of Electrical and Electronic Engineers
Pages	514-518
ISBN (Electronic)	978-1-4244-2257-9
ISBN (Print)	978-1-4244-2256-2
DOIs	https://doi.org/10.1109/ISIT.2008.4595039
Publication status	Published - 29 Sept 2008
MoE publication type	A4 Article in a conference publication
Event	2008 IEEE International Symposium on Information Theory, ISIT 2008 - Toronto, ON, Canada Duration: 6 Jul 2008 → 11 Jul 2008

Publication series

Series	IEEE International Symposium on Information Theory. Proceedings
Volume	2008
ISSN	2157-8095

Conference

Conference	2008 IEEE International Symposium on Information Theory, ISIT 2008
Country/Territory	Canada
City	Toronto, ON
Period	6/07/08 → 11/07/08

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10.1109/ISIT.2008.4595039

Cite this

Takeuchi, Keigo ; Vehkaperä, Mikko ; Tanaka, Toshiyuki et al. / Replica analysis of general multiuser detection in MIMO DS-CDMA channels with imperfect CSI. 2008 IEEE International Symposium on Information Theory, ISIT 2008. IEEE Institute of Electrical and Electronic Engineers, 2008. pp. 514-518 (IEEE International Symposium on Information Theory. Proceedings, Vol. 2008).

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title = "Replica analysis of general multiuser detection in MIMO DS-CDMA channels with imperfect CSI",

abstract = "We consider impacts of channel estimation errors on performance of general multiuser detectors in MIMO DS-CDMA channels. We evaluate their performance in terms of asymptotic spectral efficiency, which is obtained via decoupling structure, by using the replica method. Numerical results imply that the performance of LMMSE detection is very close to that of MMSE detection for small system loads. Furthermore, we find that the spectral efficiency of MMSE detection grows discontinuously with the length of pilot sequences for large system loads, and that the critical length is close to the optimal length. While it is indistinguishable from that of LMMSE detection for short pilot sequences, the gap between the two is significantly large if the length of pilot sequences is longer than the critical length.",

author = "Keigo Takeuchi and Mikko Vehkaper{\"a} and Toshiyuki Tanaka and Muller, {Ralf R.}",

year = "2008",

month = sep,

day = "29",

doi = "10.1109/ISIT.2008.4595039",

language = "English",

isbn = "978-1-4244-2256-2",

series = "IEEE International Symposium on Information Theory. Proceedings",

publisher = "IEEE Institute of Electrical and Electronic Engineers",

pages = "514--518",

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note = "2008 IEEE International Symposium on Information Theory, ISIT 2008 ; Conference date: 06-07-2008 Through 11-07-2008",

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Takeuchi, K, Vehkaperä, M, Tanaka, T & Muller, RR 2008, Replica analysis of general multiuser detection in MIMO DS-CDMA channels with imperfect CSI. in 2008 IEEE International Symposium on Information Theory, ISIT 2008., 4595039, IEEE Institute of Electrical and Electronic Engineers, IEEE International Symposium on Information Theory. Proceedings, vol. 2008, pp. 514-518, 2008 IEEE International Symposium on Information Theory, ISIT 2008, Toronto, ON, Canada, 6/07/08. https://doi.org/10.1109/ISIT.2008.4595039

Replica analysis of general multiuser detection in MIMO DS-CDMA channels with imperfect CSI. / Takeuchi, Keigo; Vehkaperä, Mikko; Tanaka, Toshiyuki et al.
2008 IEEE International Symposium on Information Theory, ISIT 2008. IEEE Institute of Electrical and Electronic Engineers, 2008. p. 514-518 4595039 (IEEE International Symposium on Information Theory. Proceedings, Vol. 2008).

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

TY - GEN

T1 - Replica analysis of general multiuser detection in MIMO DS-CDMA channels with imperfect CSI

AU - Takeuchi, Keigo

AU - Vehkaperä, Mikko

AU - Tanaka, Toshiyuki

AU - Muller, Ralf R.

PY - 2008/9/29

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N2 - We consider impacts of channel estimation errors on performance of general multiuser detectors in MIMO DS-CDMA channels. We evaluate their performance in terms of asymptotic spectral efficiency, which is obtained via decoupling structure, by using the replica method. Numerical results imply that the performance of LMMSE detection is very close to that of MMSE detection for small system loads. Furthermore, we find that the spectral efficiency of MMSE detection grows discontinuously with the length of pilot sequences for large system loads, and that the critical length is close to the optimal length. While it is indistinguishable from that of LMMSE detection for short pilot sequences, the gap between the two is significantly large if the length of pilot sequences is longer than the critical length.

AB - We consider impacts of channel estimation errors on performance of general multiuser detectors in MIMO DS-CDMA channels. We evaluate their performance in terms of asymptotic spectral efficiency, which is obtained via decoupling structure, by using the replica method. Numerical results imply that the performance of LMMSE detection is very close to that of MMSE detection for small system loads. Furthermore, we find that the spectral efficiency of MMSE detection grows discontinuously with the length of pilot sequences for large system loads, and that the critical length is close to the optimal length. While it is indistinguishable from that of LMMSE detection for short pilot sequences, the gap between the two is significantly large if the length of pilot sequences is longer than the critical length.

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SN - 978-1-4244-2256-2

T3 - IEEE International Symposium on Information Theory. Proceedings

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BT - 2008 IEEE International Symposium on Information Theory, ISIT 2008

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Takeuchi K, Vehkaperä M, Tanaka T, Muller RR. Replica analysis of general multiuser detection in MIMO DS-CDMA channels with imperfect CSI. In 2008 IEEE International Symposium on Information Theory, ISIT 2008. IEEE Institute of Electrical and Electronic Engineers. 2008. p. 514-518. 4595039. (IEEE International Symposium on Information Theory. Proceedings, Vol. 2008). doi: 10.1109/ISIT.2008.4595039

Replica analysis of general multiuser detection in MIMO DS-CDMA channels with imperfect CSI

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