TY - GEN
T1 - Performance analysis of free space optical links over turbulence and misalignment induced fading channels
AU - Lee, I. E.
AU - Ghassemlooy, Z.
AU - Ng, W. P.
AU - Uysal, M.
PY - 2012
Y1 - 2012
N2 - The performance of free-space optical (FSO) communication system is investigated from the information theory perspective, under the influence of atmospheric loss and channel fading due to the turbulence and pointing error. The outage probability and average channel capacity of the FSO link are evaluated using a combined slow-fading channel model and a Gaussian beam wave model, unlike the limiting Rytov-based scintillation model considered in earlier work. Taking into account various link design criteria, our study reveals that lower outage probability can be achieved with larger receiver aperture due to the aperture averaging effect. Optimization of the capacity metrics is best performed through proper selection of the aperture size and beam width for known laser wavelength, particularly for long-distance links and strong turbulence scenarios. Hence, findings and results from our analysis can be treated as the design benchmark for optimal planning and deployment of optical links.
AB - The performance of free-space optical (FSO) communication system is investigated from the information theory perspective, under the influence of atmospheric loss and channel fading due to the turbulence and pointing error. The outage probability and average channel capacity of the FSO link are evaluated using a combined slow-fading channel model and a Gaussian beam wave model, unlike the limiting Rytov-based scintillation model considered in earlier work. Taking into account various link design criteria, our study reveals that lower outage probability can be achieved with larger receiver aperture due to the aperture averaging effect. Optimization of the capacity metrics is best performed through proper selection of the aperture size and beam width for known laser wavelength, particularly for long-distance links and strong turbulence scenarios. Hence, findings and results from our analysis can be treated as the design benchmark for optimal planning and deployment of optical links.
KW - Free-space optical (FSO) communications
KW - Gaussian-beam wave
KW - atmospheric turbulence
KW - average (ergodic) capacity
KW - outage probability
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U2 - 10.1109/CSNDSP.2012.6292668
DO - 10.1109/CSNDSP.2012.6292668
M3 - Conference contribution
AN - SCOPUS:84868525214
SN - 9781457714733
T3 - Proceedings of the 2012 8th International Symposium on Communication Systems, Networks and Digital Signal Processing, CSNDSP 2012
BT - Proceedings of the 2012 8th International Symposium on Communication Systems, Networks and Digital Signal Processing, CSNDSP 2012
T2 - 2012 8th International Symposium on Communication Systems, Networks and Digital Signal Processing, CSNDSP 2012
Y2 - 18 July 2012 through 20 July 2012
ER -