TY - JOUR
T1 - Asymptotic Performance of Generalized Transmit Laser Selection over Lognormal Turbulence Channels
AU - Elamassie, Mohammed
AU - Uysal, Murat
N1 - Funding Information:
Manuscript received April 13, 2020; accepted April 18, 2020. Date of publication April 22, 2020; date of current version August 12, 2020. The work of Murat Uysal is supported by the Turkish Scientific and Research Council under Grant 215E119. The associate editor coordinating the review of this letter and approving it for publication was B. Makki. (Corresponding author: Mohammed Elamassie.) The authors are with the Department of Electrical and Electronics Engineering, Özyegˇin University, 34794 Istanbul, Turkey (e-mail: [email protected]; [email protected]). Digital Object Identifier 10.1109/LCOMM.2020.2989560
Publisher Copyright:
© 1997-2012 IEEE.
PY - 2020/8
Y1 - 2020/8
N2 - In free space optical communication systems, transmit laser selection (TLS) has been proposed as an efficient fading-mitigation technique over turbulence channels. In TLS, the transmitter is equipped with a number of laser sources and the best laser source is selected for transmission. In practice, feedback error or outdated selection due to temporal changes in the channel may result in selecting another source rather than the best one. In this letter, we consider a FSOC system with generalized TLS (GTLS) where the nth best laser is selected among the available N lasers. Under the assumption of lognormal turbulence channels in addition to pointing errors, we derive a closed-form expression for asymptotic bit error rate. We use our derived closed-form expression to determine the diversity gains. We finally present simulation results to corroborate our analytical findings.
AB - In free space optical communication systems, transmit laser selection (TLS) has been proposed as an efficient fading-mitigation technique over turbulence channels. In TLS, the transmitter is equipped with a number of laser sources and the best laser source is selected for transmission. In practice, feedback error or outdated selection due to temporal changes in the channel may result in selecting another source rather than the best one. In this letter, we consider a FSOC system with generalized TLS (GTLS) where the nth best laser is selected among the available N lasers. Under the assumption of lognormal turbulence channels in addition to pointing errors, we derive a closed-form expression for asymptotic bit error rate. We use our derived closed-form expression to determine the diversity gains. We finally present simulation results to corroborate our analytical findings.
KW - Free space optical communication
KW - diversity order
KW - generalized transmit laser selection
KW - lognormal fading
UR - http://www.scopus.com/inward/record.url?scp=85089939893&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85089939893&partnerID=8YFLogxK
U2 - 10.1109/LCOMM.2020.2989560
DO - 10.1109/LCOMM.2020.2989560
M3 - Article
AN - SCOPUS:85089939893
SN - 1089-7798
VL - 24
SP - 1762
EP - 1766
JO - IEEE Communications Letters
JF - IEEE Communications Letters
IS - 8
M1 - 9075993
ER -