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Factor graph based joint detection/decoding for LDPC coded large-MIMO systems

Narasimhan, Lakshmi T and Chockalingam, A and Rajan, Sundar B (2012) Factor graph based joint detection/decoding for LDPC coded large-MIMO systems. In: IEEE 75th Vehicular Technology Conference (VTC Spring), MAY 06-09, 2012 , Yokohama, JAPAN.

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Official URL: http://dx.doi.org/10.1109/VETECS.2012.6240094

Abstract

In this paper, we employ message passing algorithms over graphical models to jointly detect and decode symbols transmitted over large multiple-input multiple-output (MIMO) channels with low density parity check (LDPC) coded bits. We adopt a factor graph based technique to integrate the detection and decoding operations. A Gaussian approximation of spatial interference is used for detection. This serves as a low complexity joint detection/decoding approach for large dimensional MIMO systems coded with LDPC codes of large block lengths. This joint processing achieves significantly better performance than the individual detection and decoding scheme.

Item Type: Conference Paper
Additional Information: Copyright of this article belongs to IEEE.
Keywords: Large-MIMO; LDPC; Joint Detection/Decoding; Factor Graphs; Belief Propagation; Message Passing
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Depositing User: Id for Latest eprints
Date Deposited: 28 Feb 2013 09:05
Last Modified: 28 Feb 2013 09:05
URI: http://eprints.iisc.ac.in/id/eprint/45360

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