EXIT Chart Based Design of Irregular LDPC Codes for Large-MIMO Systems
Data(s) |
2013
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Resumo |
In this letter, we 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. With low complexity joint detection-decoding, these codes are shown to perform better than off-the-shelf irregular codes in the literature by about 1 to 1.5 dB at a coded BER of 10(-5) in 16 x 16, 64 x 64 and 256 x 256 MIMO systems. |
Formato |
application/pdf |
Identificador |
http://eprints.iisc.ernet.in/46003/1/ieee_com_let_17-1_115_2013.pdf Narasimhan, Lakshmi T and Chockalingam, A (2013) EXIT Chart Based Design of Irregular LDPC Codes for Large-MIMO Systems. In: IEEE COMMUNICATIONS LETTERS, 17 (1). pp. 115-118. |
Publicador |
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC |
Relação |
http://dx.doi.org/10.1109/LCOMM.2012.112812.122249 http://eprints.iisc.ernet.in/46003/ |
Palavras-Chave | #Electrical Communication Engineering |
Tipo |
Journal Article PeerReviewed |