Yazar
Karimi, Mehdi, Uysal, Murat
Basım Tarihi
2012-12
Basım Yeri
-
IEEE
Konu
Free-space optical communications, Adaptive transmission, Fading channel, Pulse position modulation
Tür
Süreli Yayın
Dil
İngilizce
Dijital
Evet
Yazma
Hayır
Kütüphane
Özyeğin Üniversitesi
Demirbaş Numarası
0090-6778
Kayıt Numarası
552fe6be-6c28-4c13-86e7-dfe205502b18
Lokasyon
Electrical & Electronics Engineering
Tarih
2012-12
Notlar
Due to copyright restrictions, the access to the full text of this article is only available via subscription.
Örnek Metin
Atmospheric turbulence is a major degrading factor in free-space optical (FSO) systems. Since turbulence-induced fading results in a very slowly-varying channel, reliable feedback is possible allowing the implementation of adaptive transmission in practical FSO systems. In this paper, we propose adaptive transmission algorithms in which transmit power and/or modulation size are varied according to the channel conditions. The design of adaptive algorithms is formulated as optimization problems of spectral efficiency and average power consumption at a targeted value of outage probability under peak power constraints. The proposed adaptive schemes bring significant improvements over their non-adaptive counterparts.
DOI
10.1109/TCOMM.2012.091012.110550
Cilt
60
