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 | |
| 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
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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 journal › Article
TY - JOUR
T1 - A novel SCMA system for coexistence of active users and inactive users
AU - Kim, Joonki
AU - Lee, Kwonjong
AU - Kim, Jintae
AU - Wang, Hano
AU - Na, Minsoo
AU - Hong, Daesik
PY - 2017/12
Y1 - 2017/12
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85029174910&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85029174910&partnerID=8YFLogxK
U2 - 10.1109/LCOMM.2017.2749220
DO - 10.1109/LCOMM.2017.2749220
M3 - Article
AN - SCOPUS:85029174910
VL - 21
SP - 2730
EP - 2733
JO - IEEE Communications Letters
JF - IEEE Communications Letters
SN - 1089-7798
IS - 12
ER -