A novel SCMA system for coexistence of active users and inactive users

Joonki Kim; Kwonjong Lee; Jintae Kim; Hano Wang; Minsoo Na; Daesik Hong

doi:10.1109/LCOMM.2017.2749220

A novel SCMA system for coexistence of active users and inactive users

Joonki Kim, Kwonjong Lee, Jintae Kim, Hano Wang, Minsoo Na, Daesik Hong

Department of Electrical and Electronic Engineering

Research output: Contribution to journal › Article

3 Citations (Scopus)

Abstract

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 to be active UEs. Therefore, inactive UEs cause significant decoding problem in SCMA systems. In order to solve the coexistence problem, we propose code words and a novel SCMA receiver which can distinguish the signal of active/inactive UEs. The numerical results show that the proposed SCMA receiver achieves a remarkable enhancement in false alarm probability, miss detection probability, and bit-error rate.

Original language	English
Pages (from-to)	2730-2733
Number of pages	4
Journal	IEEE Communications Letters
Volume	21
Issue number	12
DOIs	https://doi.org/10.1109/LCOMM.2017.2749220
Publication status	Published - 2017 Dec

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All Science Journal Classification (ASJC) codes

Modelling and Simulation
Computer Science Applications
Electrical and Electronic Engineering

Cite this

Kim, J., Lee, K., Kim, J., Wang, H., Na, M., & Hong, D. (2017). A novel SCMA system for coexistence of active users and inactive users. IEEE Communications Letters, 21(12), 2730-2733. https://doi.org/10.1109/LCOMM.2017.2749220

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10.1109/LCOMM.2017.2749220