PMID- 37420704
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20230710
LR  - 20230718
IS  - 1424-8220 (Electronic)
IS  - 1424-8220 (Linking)
VI  - 23
IP  - 12
DP  - 2023 Jun 13
TI  - Exploiting User Clustering and Fixed Power Allocation for Multi-Antenna 
      UAV-Assisted IoT Systems.
LID - 10.3390/s23125537 [doi]
LID - 5537
AB  - Internet of Things (IoT) systems cooperative with unmanned aerial vehicles (UAVs) 
      have been put into use for more than ten years, from transportation to military 
      surveillance, and they have been shown to be worthy of inclusion in the next 
      wireless protocols. Therefore, this paper studies user clustering and the fixed 
      power allocation approach by placing multi-antenna UAV-mounted relays for 
      extended coverage areas and achieving improved performance for IoT devices. In 
      particular, the system enables UAV-mounted relays with multiple antennas together 
      with non-orthogonal multiple access (NOMA) to provide a potential way to enhance 
      transmission reliability. We presented two cases of multi-antenna UAVs such as 
      maximum ratio transmission and the best selection to highlight the benefits of 
      the antenna-selections approach with low-cost design. In addition, the base 
      station managed its IoT devices in practical scenarios with and without direct 
      links. For two cases, we derive closed-form expressions of outage probability 
      (OP) and closed-form approximation ergodic capacity (EC) generated for both 
      devices in the main scenario. The outage and ergodic capacity performances in 
      some scenarios are compared to confirm the benefits of the considered system. The 
      number of antennas was found to have a crucial impact on the performances. The 
      simulation results show that the OP for both users strongly decreases when the 
      signal-to-noise ratio (SNR), number of antennas, and fading severity factor of 
      Nakagami-m fading increase. The proposed scheme outperforms the orthogonal 
      multiple access (OMA) scheme in outage performance for two users. The analytical 
      results match Monte Carlo simulations to confirm the exactness of the derived 
      expressions.
FAU - Nguyen, Sang Quang
AU  - Nguyen SQ
AUID- ORCID: 0000-0002-1798-2296
AD  - Science and Technology Application for Sustainable Development Research Group, Ho 
      Chi Minh City University of Transport, Ho Chi Minh City 700000, Vietnam.
FAU - Le, Anh-Tu
AU  - Le AT
AUID- ORCID: 0000-0002-2710-1843
AD  - Faculty of Electrical and Electronics Engineering, Ton Duc Thang University, Ho 
      Chi Minh City 700000, Vietnam.
FAU - Le, Chi-Bao
AU  - Le CB
AUID- ORCID: 0000-0002-3175-5698
AD  - Faculty of Electronics Technology, Industrial University of Ho Chi Minh City 
      (IUH), Ho Chi Minh City 700000, Vietnam.
FAU - Tin, Phu Tran
AU  - Tin PT
AD  - Data Science Laboratory, Faculty of Information Technology, Ton Duc Thang 
      University, Ho Chi Minh City 700000, Vietnam.
FAU - Kim, Yong-Hwa
AU  - Kim YH
AUID- ORCID: 0000-0003-2183-5085
AD  - Department of Data Science, Korea National University of Transportation (KNUT), 
      Uiwang-si 16106, Gyeonggi-do, Republic of Korea.
LA  - eng
GR  - No. 2022R1F1A1074975/This work was supported in part by the National Research 
      Foundation of Korea (NRF) grant funded by the Korea government(MSIT) (No. 
      2022R1F1A1074975) and in part by the Korea Institute of Energy Technology 
      Evaluation and Planning (KETEP) and the Ministry o/
PT  - Journal Article
DEP - 20230613
PL  - Switzerland
TA  - Sensors (Basel)
JT  - Sensors (Basel, Switzerland)
JID - 101204366
SB  - IM
MH  - Humans
MH  - *Internet of Things
MH  - Reproducibility of Results
MH  - Cluster Analysis
MH  - Computer Simulation
MH  - *Military Personnel
PMC - PMC10301195
OTO - NOTNLM
OT  - AF
OT  - NOMA
OT  - UAV
OT  - ergodic capacity
OT  - maximum ratio transmission
OT  - outage probability
COIS- We have also no conflict of interest to disclose.
EDAT- 2023/07/08 10:42
MHDA- 2023/07/10 06:42
PMCR- 2023/06/13
CRDT- 2023/07/08 01:11
PHST- 2023/04/20 00:00 [received]
PHST- 2023/06/01 00:00 [revised]
PHST- 2023/06/11 00:00 [accepted]
PHST- 2023/07/10 06:42 [medline]
PHST- 2023/07/08 10:42 [pubmed]
PHST- 2023/07/08 01:11 [entrez]
PHST- 2023/06/13 00:00 [pmc-release]
AID - s23125537 [pii]
AID - sensors-23-05537 [pii]
AID - 10.3390/s23125537 [doi]
PST - epublish
SO  - Sensors (Basel). 2023 Jun 13;23(12):5537. doi: 10.3390/s23125537.