A Novel SCMA System for Coexistence of Active Users and Inactive Users

This letter proposes a new sparse code multiple access (SCMA) system for handling the coexistence of active user equipments (UEs) and inactive UEs, which share the same frequency/time resources for an uplink grant-free scenario. SCMA systems use a message passing algorithm, which considers all UEs t...

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Veröffentlicht in:	IEEE communications letters 2017-12, Vol.21 (12), p.2730-2733
Hauptverfasser:	Kim, Joonki, Lee, Kwonjong, Kim, Jintae, Wang, Hano, Hong, Daesik
Format:	Artikel
Sprache:	eng
Schlagworte:	5G mobile communication Decoding Interference iterative decoder Message passing Modulation Non-orthogonal multiple access Receivers UL grant free Uplink
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