TY - JOUR
T1 - Threshold-based multiple optical signal selection scheme for free-space optical wavelength division multiplexing systems
AU - Nam, Sung Sik
AU - Alouini, Mohamed Slim
AU - Zhang, Lin
AU - Ko, Young Chai
N1 - Funding Information:
This work is supported by a grant to Terahertz Electronic Device Research Laboratory funded by the Defense Acquisition Program Administration and by the Agency for Defense Development (UD150043RD).
Publisher Copyright:
Journal © 2017 Optical Society of America.
PY - 2017/12
Y1 - 2017/12
N2 - We propose a threshold-based multiple optical signal selection scheme (TMOS) for free-space optical wavelength division multiplexing systems. With this scheme, we can obtain higher spectral efficiency while reducing the possible complexity of implementation caused by the beam-selection scheme and without a considerable performance loss. To characterize the performance of our scheme, we statistically analyze the operation characteristics under conventional detection conditions (i.e., heterodyne detection and intensity modulation/direct detection techniques) with log-normal turbulence while taking into consideration the impact of pointing error. More specifically, we derive exact closed-form expressions for the outage probability, the average bit error rate, and the average spectral efficiency while adopting an adaptive modulation. Some selected results show that TMOS increases the average spectral efficiency while maintaining a minimum average bit error rate requirement.
AB - We propose a threshold-based multiple optical signal selection scheme (TMOS) for free-space optical wavelength division multiplexing systems. With this scheme, we can obtain higher spectral efficiency while reducing the possible complexity of implementation caused by the beam-selection scheme and without a considerable performance loss. To characterize the performance of our scheme, we statistically analyze the operation characteristics under conventional detection conditions (i.e., heterodyne detection and intensity modulation/direct detection techniques) with log-normal turbulence while taking into consideration the impact of pointing error. More specifically, we derive exact closed-form expressions for the outage probability, the average bit error rate, and the average spectral efficiency while adopting an adaptive modulation. Some selected results show that TMOS increases the average spectral efficiency while maintaining a minimum average bit error rate requirement.
KW - Free-space optical communication
KW - Heterodyne detection
KW - Intensity modulation/direct detection
KW - Log-normal turbulence
KW - Wavelength division multiplexing
UR - http://www.scopus.com/inward/record.url?scp=85034070393&partnerID=8YFLogxK
U2 - 10.1364/JOCN.9.001085
DO - 10.1364/JOCN.9.001085
M3 - Article
AN - SCOPUS:85034070393
SN - 1943-0620
VL - 9
SP - 1085
EP - 1096
JO - Journal of Optical Communications and Networking
JF - Journal of Optical Communications and Networking
IS - 12
ER -