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Factor Graph Based Joint Detection/Decoding for LDPC Coded Large-MIMO Systems

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3 Author(s)
Narasimhan, T.L. ; Dept. of ECE, Indian Inst. of Sci., Bangalore, India ; Chockalingam, A. ; Rajan, B.S.

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.

Published in:

Vehicular Technology Conference (VTC Spring), 2012 IEEE 75th

Date of Conference:

6-9 May 2012