NDLI: Optimally Efficient Max-Log APP Demodulation in MIMO Systems

Content Provider	IEEE Xplore Digital Library
Author	Prasad, N. Kalbat, K.Y. Xiaodong Wang
Copyright Year	2007
Abstract	In this paper, we consider the design of multi-stream demodulators for multiple-input multiple-output (MIMO) systems. Our proposed MIMO demodulator is based on the stack tree-search strategy and provides soft-outputs in the form of exact max-log log-likelihood ratios (max-log LLRs). We prove that our proposed demodulator is optimally efficient in that it visits the least number of nodes among all optimal demodulators in a class of tree-search-based demodulators. We conduct a comprehensive complexity analysis of such optimally efficient demodulators. We also identify key parameters associated with our proposed demodulator that can be controlled to realize near max-log performance with substantially reduced complexity, as demonstrated via simulations.
Sponsorship	IEEE Signal Processing Society
Starting Page	1400
Ending Page	1414
Page Count	15
File Size	954665
File Format	PDF
ISSN	19324553
Volume Number	5
Issue Number	8
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-12-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Demodulation MIMO Complexity theory Decision trees Estimation stack algorithm Demodulator log-likelihood ratio (LLR) max-log approximation multiple-input multiple-output (MIMO)
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering

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