Replica analysis of general multiuser detection in MIMO DS-CDMA channels with imperfect CSI
Takeuchi K, Vehkaperä M, Tanaka T, Müller R (2008)
Publication Status: Published
Publication Type: Conference contribution, Conference Contribution
Publication year: 2008
Pages Range: 514-518
Article Number: 4595039
Event location: Toronto, ON
ISBN: 9781424422579
DOI: 10.1109/ISIT.2008.4595039
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. © 2008 IEEE.
Authors with CRIS profile
Involved external institutions
Kyoto University / 京都大学 Kyōto daigaku
Japan (JP)
NTNU Trondheim - Norwegian University of Science and Technology
Norway (NO)
Japan (JP)
NTNU Trondheim - Norwegian University of Science and Technology
Norway (NO)
How to cite
APA:
Takeuchi, K., Vehkaperä, M., Tanaka, T., & Müller, R. (2008). Replica analysis of general multiuser detection in MIMO DS-CDMA channels with imperfect CSI. In Proceedings of the 2008 IEEE International Symposium on Information Theory, ISIT 2008 (pp. 514-518). Toronto, ON.
MLA:
Takeuchi, Keigo, et al. "Replica analysis of general multiuser detection in MIMO DS-CDMA channels with imperfect CSI." Proceedings of the 2008 IEEE International Symposium on Information Theory, ISIT 2008, Toronto, ON 2008. 514-518.
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