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The Optimal MMSEBased OSIC Detector for MIMO System
Yunchao SONG Chen LIU Feng LU
Publication
IEICE TRANSACTIONS on Communications
Vol.E99B
No.1
pp.232239 Publication Date: 2016/01/01
Online ISSN: 17451345
DOI: 10.1587/transcom.2015EBP3196
Type of Manuscript: PAPER Category: Wireless Communication Technologies Keyword: MIMO systems, MMSEBased OSIC detector, error probability, lowcomplexity, MMSEOBEP,
Full Text: PDF(1.2MB)>>
Summary:
The ordered successive interference cancellation (OSIC) detector based on the minimum mean square error (MMSE) criterion has been proved to be a lowcomplexity detector with efficient bit error rate (BER) performance. As the wellknown MMSEBased OSIC detector, the MMSEBased vertical Bell Laboratories Layered SpaceTime (VBLAST) detector, whose computational complexity is cubic, can not attain the minimum BER performance. Some approaches to reducing the BER of the MMSEBased VBLAST detector have been contributed, however these improvements have large computational complexity. In this paper, a low complexity MMSEBased OSIC detector called MMSEOBEP (ordering based on error probability) is proposed to improve the BER performance of the previous MMSEBased OSIC detectors, and it has cubic complexity. The proposed detector derives the nearexact error probability of the symbols in the MMSEBased OSIC detector, thus giving priority to detect the symbol with the smallest error probability can minimize the error propagation in the MMSEBased OSIC detector and enhance the BER performance. We show that, although the computational complexity of the proposed detector is cubic, it can provide better BER performance than the previous MMSEBased OSIC detector.

