Improved large-MIMO detection based on damped belief propagation
Data(s) |
08/01/2010
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Resumo |
In this paper, we consider the application of belief propagation (BP) to achieve near-optimal signal detection in large multiple-input multiple-output (MIMO) systems at low complexities. Large-MIMO architectures based on spatial multiplexing (V-BLAST) as well as non-orthogonal space-time block codes(STBC) from cyclic division algebra (CDA) are considered. We adopt graphical models based on Markov random fields (MRF) and factor graphs (FG). In the MRF based approach, we use pairwise compatibility functions although the graphical models of MIMO systems are fully/densely connected. In the FG approach, we employ a Gaussian approximation (GA) of the multi-antenna interference, which significantly reduces the complexity while achieving very good performance for large dimensions. We show that i) both MRF and FG based BP approaches exhibit large-system behavior, where increasingly closer to optimal performance is achieved with increasing number of dimensions, and ii) damping of messages/beliefs significantly improves the bit error performance. |
Formato |
application/pdf |
Identificador |
http://eprints.iisc.ernet.in/39056/1/Improved_Large.pdf Som, P and Datta, T and Chockalingam, A and Rajan, BS (2010) Improved large-MIMO detection based on damped belief propagation. In: Information Theory Workshop (ITW), 2010 IEEE , 6-8 Jan. 2010, Cairo. |
Publicador |
IEEE |
Relação |
http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=5503188 http://eprints.iisc.ernet.in/39056/ |
Palavras-Chave | #Electrical Communication Engineering |
Tipo |
Conference Paper PeerReviewed |