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

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

Research output: Contribution to journalArticle

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 languageEnglish
Pages (from-to)2730-2733
Number of pages4
JournalIEEE Communications Letters
Volume21
Issue number12
DOIs
Publication statusPublished - 2017 Dec

Fingerprint

Multiple Access
Coexistence
Receiver
Message-passing Algorithms
Detection Probability
Message passing
Uplink
False Alarm
Bit error rate
Decoding
Error Rate
Enhancement
Numerical Results
Scenarios
Resources

All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Computer Science Applications
  • Electrical and Electronic Engineering

Cite this

Kim, Joonki ; Lee, Kwonjong ; Kim, Jintae ; Wang, Hano ; Na, Minsoo ; Hong, Daesik. / A novel SCMA system for coexistence of active users and inactive users. In: IEEE Communications Letters. 2017 ; Vol. 21, No. 12. pp. 2730-2733.
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A novel SCMA system for coexistence of active users and inactive users. / Kim, Joonki; Lee, Kwonjong; Kim, Jintae; Wang, Hano; Na, Minsoo; Hong, Daesik.

In: IEEE Communications Letters, Vol. 21, No. 12, 12.2017, p. 2730-2733.

Research output: Contribution to journalArticle

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