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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Veröffentlicht in:IEEE communications letters Jg. 17; H. 1; S. 115 - 118
Hauptverfasser: Narasimhan, T. L., Chockalingam, A.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York, NY IEEE 01.01.2013
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
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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Beschreibung
Zusammenfassung: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.
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ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2012.112812.122249