PMID- 36772786
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20230213
LR  - 20230214
IS  - 1424-8220 (Electronic)
IS  - 1424-8220 (Linking)
VI  - 23
IP  - 3
DP  - 2023 Feb 3
TI  - Research on Power Allocation in Multiple-Beam Space Division Access Based on NOMA 
      for Underwater Optical Communication.
LID - 10.3390/s23031746 [doi]
LID - 1746
AB  - To meet the transmission requirements of different users in a multiple-beam 
      access system for underwater optical communication (UWOC), this paper proposes a 
      novel multiple-beam space division multiple access (MB-SDMA) system by utilizing 
      a directional radiation communication beam of the hemispherical LED arrays. The 
      system's access users in the different beams are divided into two categories: the 
      users with a single beam and the users with multiple beams. We also propose a 
      power allocation algorithm that guarantees the quality of service (QoS) for 
      single beam and multiple beam access, especially the QoS for edge users, and 
      fairness for all users. An optimization model of power distribution under the 
      constraints of specific light-emitting diode (LED) emission power is established 
      for two scenarios, which ensure the user QoS for edge users and the max-min 
      fairness for fair users. Using the Karush-Kuhn-Tucker (KKT) condition and the 
      bisection method, we obtain the optimal power allocation expression for the two 
      types of users in the optimization model. Through simulation, we verify that the 
      proposed user classification and power allocation method can ensure the fairness 
      of fair users on the premise of ensuring the QoS of edge users. At the same time, 
      we know that the number of users will affect the improvement of the minimum rate, 
      and the throughput of the non-orthogonal multiple access (NOMA) system is greatly 
      improved compared with the traditional orthogonal multiple access (OMA) systems.
FAU - Li, Yanlong
AU  - Li Y
AUID- ORCID: 0000-0002-1144-8789
AD  - Optical Communications Laboratory, Ocean College, Zhejiang University, Zheda Road 
      1, Zhoushan 316021, China.
AD  - Ocean Research Center of Zhoushan, Zhejiang University, Zhoushan 316021, China.
AD  - Key Laboratory of Cognitive Radio Information Processing of the Ministry of 
      Education, Guilin University of Electronic Technology, Guilin 541004, China.
FAU - Mohsan, Syed Agha Hassnain
AU  - Mohsan SAH
AUID- ORCID: 0000-0002-5810-4983
AD  - Optical Communications Laboratory, Ocean College, Zhejiang University, Zheda Road 
      1, Zhoushan 316021, China.
FAU - Chen, Xiao
AU  - Chen X
AUID- ORCID: 0000-0002-8705-7127
AD  - Key Laboratory of Cognitive Radio Information Processing of the Ministry of 
      Education, Guilin University of Electronic Technology, Guilin 541004, China.
FAU - Tehseen, Riffat
AU  - Tehseen R
AD  - Optical Communications Laboratory, Ocean College, Zhejiang University, Zheda Road 
      1, Zhoushan 316021, China.
FAU - Li, Shuaixing
AU  - Li S
AD  - Key Laboratory of Cognitive Radio Information Processing of the Ministry of 
      Education, Guilin University of Electronic Technology, Guilin 541004, China.
FAU - Wang, Jianzhao
AU  - Wang J
AD  - Key Laboratory of Cognitive Radio Information Processing of the Ministry of 
      Education, Guilin University of Electronic Technology, Guilin 541004, China.
LA  - eng
GR  - 62261009/the National Natural Science Foundation of China under grant/
GR  - 2022GXNSFDA035070/Guangxi Natural Science Foundation/
GR  - CRKL200106/Ministry of Education Key Laboratory of Cognitive Radio and 
      Information Processing/
GR  - YCSW2022288/Innovation Project of Guangxi Graduate Education/
PT  - Journal Article
DEP - 20230203
PL  - Switzerland
TA  - Sensors (Basel)
JT  - Sensors (Basel, Switzerland)
JID - 101204366
SB  - IM
PMC - PMC9920590
OTO - NOTNLM
OT  - max-min rates
OT  - non-orthogonal multiple access
OT  - power allocation
OT  - underwater optical communication
COIS- The authors declare no known competing financial interests or personal 
      relationships that could have influenced the work reported in this advanced 
      research.
EDAT- 2023/02/12 06:00
MHDA- 2023/02/12 06:01
PMCR- 2023/02/03
CRDT- 2023/02/11 01:46
PHST- 2022/12/29 00:00 [received]
PHST- 2023/01/21 00:00 [revised]
PHST- 2023/01/31 00:00 [accepted]
PHST- 2023/02/11 01:46 [entrez]
PHST- 2023/02/12 06:00 [pubmed]
PHST- 2023/02/12 06:01 [medline]
PHST- 2023/02/03 00:00 [pmc-release]
AID - s23031746 [pii]
AID - sensors-23-01746 [pii]
AID - 10.3390/s23031746 [doi]
PST - epublish
SO  - Sensors (Basel). 2023 Feb 3;23(3):1746. doi: 10.3390/s23031746.