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DESIGN OF A CONVERGENCE-AWARE BASED EXPECTATION PROPAGATION ALGORITHM FOR UPLINK MIMO SCMA SYSTEMS

Abstract: 

Sparse code multiple access (SCMA) uses multi-dimensional sparse codewords to transmit user data. The expectation propagation algorithm (EPA) exploiting the sparse property shows linear complexity growth and thus is preferred for multi-user detection. To further reduce the complexity, a convergence-aware based EPA for uplink MIMO SCMA systems is proposed. Techniques including user termination, antenna termination, and codebook reduction are adopted. The user termination must be combined with the iteration constraint to avoid misjudgement. The antenna termination can stop the computations related with certain antennas having strong channel gains. Only possible codewords are considered in the reduced codebook to eliminate unnecessary calculation for posterior probability. From simulation results, we show that these three techniques can strike a balance between performance and complexity and more than 50% complexity can be saved.

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Paper Details

Authors:
Jih-Yang Lin, Pei-Yun Tsai
Submitted On:
15 May 2020 - 2:08am
Short Link:
Type:
Presentation Slides
Event:
Presenter's Name:
Jih-Yang Lin
Paper Code:
DISP-P3.3
Document Year:
2020
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Document Files

SCMA Presentation PPT_v2_upload.pdf

(19)

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[1] Jih-Yang Lin, Pei-Yun Tsai, "DESIGN OF A CONVERGENCE-AWARE BASED EXPECTATION PROPAGATION ALGORITHM FOR UPLINK MIMO SCMA SYSTEMS", IEEE SigPort, 2020. [Online]. Available: http://sigport.org/5338. Accessed: Jul. 16, 2020.
@article{5338-20,
url = {http://sigport.org/5338},
author = {Jih-Yang Lin; Pei-Yun Tsai },
publisher = {IEEE SigPort},
title = {DESIGN OF A CONVERGENCE-AWARE BASED EXPECTATION PROPAGATION ALGORITHM FOR UPLINK MIMO SCMA SYSTEMS},
year = {2020} }
TY - EJOUR
T1 - DESIGN OF A CONVERGENCE-AWARE BASED EXPECTATION PROPAGATION ALGORITHM FOR UPLINK MIMO SCMA SYSTEMS
AU - Jih-Yang Lin; Pei-Yun Tsai
PY - 2020
PB - IEEE SigPort
UR - http://sigport.org/5338
ER -
Jih-Yang Lin, Pei-Yun Tsai. (2020). DESIGN OF A CONVERGENCE-AWARE BASED EXPECTATION PROPAGATION ALGORITHM FOR UPLINK MIMO SCMA SYSTEMS. IEEE SigPort. http://sigport.org/5338
Jih-Yang Lin, Pei-Yun Tsai, 2020. DESIGN OF A CONVERGENCE-AWARE BASED EXPECTATION PROPAGATION ALGORITHM FOR UPLINK MIMO SCMA SYSTEMS. Available at: http://sigport.org/5338.
Jih-Yang Lin, Pei-Yun Tsai. (2020). "DESIGN OF A CONVERGENCE-AWARE BASED EXPECTATION PROPAGATION ALGORITHM FOR UPLINK MIMO SCMA SYSTEMS." Web.
1. Jih-Yang Lin, Pei-Yun Tsai. DESIGN OF A CONVERGENCE-AWARE BASED EXPECTATION PROPAGATION ALGORITHM FOR UPLINK MIMO SCMA SYSTEMS [Internet]. IEEE SigPort; 2020. Available from : http://sigport.org/5338