PMID- 34263845
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20210715
IS  - 1539-4522 (Electronic)
IS  - 1559-128X (Linking)
VI  - 60
IP  - 19
DP  - 2021 Jul 1
TI  - Performance improvement of FSO communication systems using hybrid-ARQ protocols.
PG  - 5553-5563
LID - 10.1364/AO.424687 [doi]
AB  - In release 16 of the third-generation project partnership, it has been suggested 
      that hybrid-automatic repeat request (H-ARQ) protocols can be used to ensure 
      robust communications. In this paper, we incorporate H-ARQ in the free-space 
      optical (FSO) communication systems to improve their performance and 
      communication link reliability. We derive novel, to the best of our knowledge, 
      closed-form expressions for the outage probability of the FSO systems under the 
      combined impact of gamma-gamma distributed atmospheric turbulence and pointing 
      errors (PEs) for heterodyne detection and intensity modulation and direct 
      detection techniques. This is accomplished using various H-ARQ protocols, such 
      as, at least once, chase combing, and incremental redundancy (INR). Further, 
      using outage probability expressions, we calculate throughput for the FSO systems 
      using H-ARQ protocols. Useful insights into the FSO system performance are 
      obtained through the asymptotic analysis for the considered H-ARQ protocols and 
      detection techniques. It is observed through the numerical results that H-ARQ 
      with INR performs better than the other considered H-ARQ protocols. We also draw 
      a comparison between the outage performance of an FSO system with boresight PE 
      and without boresight PE.
FAU - Verma, Gyan Deep
AU  - Verma GD
FAU - Mathur, Aashish
AU  - Mathur A
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Appl Opt
JT  - Applied optics
JID - 0247660
SB  - IM
EDAT- 2021/07/16 06:00
MHDA- 2021/07/16 06:01
CRDT- 2021/07/15 09:06
PHST- 2021/07/15 09:06 [entrez]
PHST- 2021/07/16 06:00 [pubmed]
PHST- 2021/07/16 06:01 [medline]
AID - 452680 [pii]
AID - 10.1364/AO.424687 [doi]
PST - ppublish
SO  - Appl Opt. 2021 Jul 1;60(19):5553-5563. doi: 10.1364/AO.424687.