PMID- 35746302
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20220716
IS  - 1424-8220 (Electronic)
IS  - 1424-8220 (Linking)
VI  - 22
IP  - 12
DP  - 2022 Jun 15
TI  - Performance Analysis of Dual-Hop Hybrid RF-UOWC NOMA Systems.
LID - 10.3390/s22124521 [doi]
LID - 4521
AB  - The hybrid combination between underwater optical wireless communication (UOWC) 
      and radio frequency (RF) is a vital demand for enabling communication through the 
      air-water boundary. On the other hand, non-orthogonal multiple access (NOMA) is a 
      key technology for enhancing system performance in terms of spectral efficiency. 
      In this paper, we propose a downlink NOMA-based dual-hop hybrid RF-UOWC with 
      decode and forward (DF) relaying. The UOWC channels are characterized by 
      exponential-generalized Gamma (EGG) fading, while the RF channel is characterized 
      by Rayleigh fading. Exact closed-form expressions of outage probabilities and 
      approximated closed-form expressions of ergodic capacities are derived, for each 
      NOMA individual user and the overall system as well, under the practical 
      assumption of imperfect successive interference cancellation (SIC). These 
      expressions are then verified via Monte-Carlo simulation for various underwater 
      scenarios. To gain more insight into the system performance, we analyzed the 
      asymptotic outage probabilities and the diversity order. Moreover, we formulated 
      and solved a power allocation optimization problem to obtain an outage-optimal 
      performance. For the sake of comparison and to highlight the achievable gain, the 
      system performance is compared against a benchmark orthogonal multiple access 
      (OMA)-based system.
FAU - Samir, Ahmed
AU  - Samir A
AUID- ORCID: 0000-0002-5117-7880
AD  - Faculty of Engineering at Shoubra, Benha University, Cairo 13511, Egypt.
FAU - Elsayed, Mohamed
AU  - Elsayed M
AUID- ORCID: 0000-0001-5963-6001
AD  - Faculty of Engineering at Shoubra, Benha University, Cairo 13511, Egypt.
FAU - El-Banna, Ahmad A Aziz
AU  - El-Banna AAA
AUID- ORCID: 0000-0001-7234-7642
AD  - Faculty of Engineering at Shoubra, Benha University, Cairo 13511, Egypt.
FAU - Shafique Ansari, Imran
AU  - Shafique Ansari I
AUID- ORCID: 0000-0001-8461-6547
AD  - James Watt School of Engineering, University of Glasgow, Glasgow G12 8QQ, UK.
FAU - Rabie, Khaled
AU  - Rabie K
AUID- ORCID: 0000-0002-9784-3703
AD  - Department of Engineering, Manchester Metropolitan University, Manchester M1 5GF, 
      UK.
AD  - Department of Electrical and Electronic Engineering, University of Johannesburg, 
      Johannesburg 2028, South Africa.
FAU - ElHalawany, Basem M
AU  - ElHalawany BM
AUID- ORCID: 0000-0002-5900-6541
AD  - Faculty of Engineering at Shoubra, Benha University, Cairo 13511, Egypt.
LA  - eng
PT  - Journal Article
DEP - 20220615
PL  - Switzerland
TA  - Sensors (Basel)
JT  - Sensors (Basel, Switzerland)
JID - 101204366
SB  - IM
PMC - PMC9228796
OTO - NOTNLM
OT  - exponential-generalized Gamma
OT  - hybrid RF-UOWC
OT  - non-orthogonal multiple access
OT  - optimal power allocation
OT  - outage probability
COIS- The authors declare no conflict of interest.
EDAT- 2022/06/25 06:00
MHDA- 2022/06/25 06:01
PMCR- 2022/06/15
CRDT- 2022/06/24 01:41
PHST- 2022/05/22 00:00 [received]
PHST- 2022/06/06 00:00 [revised]
PHST- 2022/06/09 00:00 [accepted]
PHST- 2022/06/24 01:41 [entrez]
PHST- 2022/06/25 06:00 [pubmed]
PHST- 2022/06/25 06:01 [medline]
PHST- 2022/06/15 00:00 [pmc-release]
AID - s22124521 [pii]
AID - sensors-22-04521 [pii]
AID - 10.3390/s22124521 [doi]
PST - epublish
SO  - Sensors (Basel). 2022 Jun 15;22(12):4521. doi: 10.3390/s22124521.