Enhancement of MARSALA Random Access with Coding Schemes, Power Distributions and Maximum Ratio Combining

Abstract : Several random access (RA) techniques have been proposed recently for the satellite return link. The main objective of these techniques is to resolve packets collisions in order to enhance the limited throughput of traditional RA schemes. In this context, Multi-Replica Decoding using Correlation based Localisation(MARSALA) has been introduced and has shown good performance with DVB-RCS2 coding scheme and equi-powered transmissions. However, it has been shown in the literature that alternative coding schemes and packets power distributions can have a positive impact on RA performance. Therefore, in this paper, we investigate the behaviour of MARSALA with various coding schemes and various packet power distributions, then we propose a configuration for optimal performance. This paper also introduces the enhancement of MARSALA RA scheme by adding MRC to optimize replicas combination and study the impact on the throughput. We compare two different MRC techniques and we evaluate, via simulations, the gain achieved using MRC with different coding schemes and unbalanced packets. The simulation results demonstrate that the proposed enhancements to MARSALA show substantial performance gain, i.e. throughput achieved for a target Packet Loss Ratio (PLR).
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Karine Zidane, Jérôme Lacan, Mathieu Gineste, Caroline Bès, Huyen Chi Bui. Enhancement of MARSALA Random Access with Coding Schemes, Power Distributions and Maximum Ratio Combining. 8th Advanced Satellite Multimedia Systems Conference 2016, Sep 2016, Palma De Mallorca, Spain. pp. 1-8. ⟨hal-01503695⟩

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