NDLI: Message passing detection for large-scale MIMO systems: damping factor analysis

Content Provider	IET Digital Library
Author	Mussi, Alex Miyamoto Abrão, Taufik
Abstract	A message passing detector based on belief propagation (BP) algorithm for Markov random fields (MRF-BP) and factor graph (FG-BP) graphical models is analysed under different large-scale (LS) multiple-input multiple-output (MIMO) scenarios, including system parameters, such as damping factor (DF), number of users and number of antennas, from N = 20 to 200 antennas. Specifically, the DF variation under different number of antennas configuration and signal-to-noise ratio (SNR) regions is extensively evaluated; bit error rate (BER) performance and computational complexity are assessed over different scenarios. Numerical results lead to a great performance gain with damped MRF-BP approach, overcoming FG-BP scheme in specific scenarios, with no extra computational complexity. Also, message damping (MD) method resulted in faster convergence of MRF-BP algorithm in LS scenarios, evidencing that, besides the performance gain, MD technique can lead to a computational complexity reduction. Specifically under low number of transmit antennas scenarios, the DF value needs to be carefully chosen. Furthermore, based on the proposed analysis, optimal value for the DF is determined considering wide LS antennas scenarios and SNR regions.
Starting Page	923
Ending Page	935
Page Count	13
ISSN	17519675
Volume Number	11
e-ISSN	17519683
Issue Number	Issue 8, Oct (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-spr/11/8
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-spr.2017.0148
Journal	IET Signal Processing
Publisher Date	2017-06-09
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Antenna Configuration Belief Propagation Algorithm BER Bit Error Rate Performance Combinatorial Mathematics Communication Computing Computational Complexity Convergence Damping Factor Analysis DF Variation Distributed System Software Error Statistics Factor Graph FG-BP Scheme Graph Theory Large-scale MIMO System LS Scenario Markov Processes Markov Random Field MD Technique Message Passing Message Passing Detection MIMO Communication MRF Performance Gain Radio Link And Equipment Signal-to-noise Ratio Region Single Antenna SNR Telecommunication Computing Transmit Antenna Scenario Transmitting Antenna
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering

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