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

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 obta...

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Vydané v:	IEEE communications letters Ročník 17; číslo 1; s. 115 - 118
Hlavní autori:	Narasimhan, T. L., Chockalingam, A.
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	New York, NY IEEE 01.01.2013 Institute of Electrical and Electronics Engineers The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Predmet:	Antennas Applied sciences Channels Coding, codes Decoding degree profile optimization Density Design engineering Detectors Exact sciences and technology EXIT chart Information, signal and communications theory joint detection-decoding Joints Large-MIMO systems Message passing MIMO Noise levels Optimization Parity check codes Radiocommunications Receivers Signal and communications theory Signal to noise ratio Systems, networks and services of telecommunications Telecommunications Telecommunications and information theory Transmission and modulation (techniques and equipments) MIMO system joint detection-decoding Bit error rate Decoding Irregular code Algorithm Information transmission EXIT chart Optimization Joint detection degree profile optimization Message passing Large-MIMO systems Error correcting code Parity check codes Antenna Large scale system
ISSN:	1089-7798, 1558-2558
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Popis
Shrnutí:	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 × 16, 64 × 64 and 256 × 256 MIMO systems.
Bibliografia:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 ObjectType-Article-2 ObjectType-Feature-1 content type line 23
ISSN:	1089-7798 1558-2558
DOI:	10.1109/LCOMM.2012.112812.122249