Yazar
Gökçe, M. C., Baykal, Y., Uysal, Murat
Basım Tarihi
2016
Basım Yeri
-
SPIE
Konu
Aperture averaging, Bit error rate, Free-space optical communication, Multiple-input multiple-output systems, Optical wave propagation, Power scintillation
Tür
Süreli Yayın
Dil
İngilizce
Dijital
Evet
Yazma
Hayır
Kütüphane
Özyeğin Üniversitesi
Demirbaş Numarası
0091-3286
Kayıt Numarası
6650daf9-52ac-4901-a49f-43841da67554
Lokasyon
Electrical & Electronics Engineering
Tarih
2016
Örnek Metin
Multiple-input multiple-output (MIMO) techniques are employed in free-space optical (FSO) links to mitigate the degrading effects of atmospheric turbulence. We consider a MIMO FSO system, which consists of a radial laser array with partially coherent Gaussian beams at the transmitter and a detector array with Gaussian apertures at the receiver. The average power and the power correlation function at the finite-sized receiver apertures are formulated by using the extended Huygens–Fresnel principle in weak atmospheric turbulence. This let us further quantify the performance metrics such as the power scintillation index, the aperture averaging factor, and the average bit error rate (BER) as functions of system parameters. The derived power scintillation equation correctly reduces to the existing coherent and partially coherent Gaussian beam scintillation indices in the limiting cases. Using the performance metrics, we analyze the effect of various practical system parameters on the performance of a MIMO FSO system. Practical system parameters include the transmitter and receiver ring radius, number of beamlets, number of finite-aperture receivers, source size, degree of source coherence, receiver aperture radius, link distance, and the structure constant of atmosphere.
DOI
10.1117/1.OE.55.11.111607
Cilt
55
