EXIT Chart Based Design of Irregular LDPC Codes for Large-MIMO Systems

Provided by: Institute of Electrical & Electronic Engineers
Topic: Networking
Format: PDF
In this paper, the authors characterize the EXtrinsic Information Transfer (EXIT) behavior of a factor graph based message passing algorithm for detection in large Multiple-Input Multiple-Output (MIMO) systems with tens to hundreds of antennas. The EXIT curves of a joint detection-decoding receiver are obtained for Low Density Parity Check (LDPC) codes of given degree distributions. From the obtained EXIT curves, an optimization of the LDPC code degree profiles is carried out to design irregular LDPC codes matched to the large-MIMO channel and joint message passing receiver.

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