BER OF ANNULAR BEAMS IN WEAK OCEANIC TURBULENCE

Rytov yöntemine dayalı olarak zayıf bir okyanussal ortamdaki lazer iletişim bağlantısının eksen üzerine ıpıldama indeksi, paralelleştirilmiş halka hüzmesi için formüle edilmiştir. Elde edilen bu değerler kullanılarak, ortalama bit hata oranı (), log-normal dağılımlı olarak değerlendirilmiştir. Paralelleştirilmiş halkalı hüzmelerin ıpldama indeksleri; sabit birincil kaynak boyutu ?1s , değişen dairesel hüzme kalınlığı, yayılma mesafesi L, kaynak boyutu ?, ortalama karesel sıcaklığın dağılma s, ortalama karesel sıcaklığın dağılma oranı ?, sıcaklık ve tuzluluk dalgalanmasının göreli kuvvetini temsil eden boyutsuz parametresiwT, sıcaklık ve tuzluluk dalgalanmasının göreli kuvvetini temsil eden boyutsuz parametresiiçin bulunur. Paralelleştirilmiş halka hüzmesi için kayanak büyüklüğü ve ortalama sinyal gürültü oranı ()' na göre , birim kütle akışkanı ve kaynak boyutları için türbülans kinetik enerjinin çeşitli dağılım oranı için sergilenmektedir. Belirtilen iletişim bağlantısında, halkasal hüzmelerin ikincil kaynak boyutu sıfıra eşit olduğunda, yani Gaussian hüzmesi olduğunda, daha fazla avantaj sağlayacaktır

Halkasal Hüzmenin Zayıf Okyanussal Türbülansta Bit Hata Oranı

Based on Rytov method, on-axis scintillation index of laser communication link in a weak oceanic medium is formulated for collimated annular beam. Employing these obtained scintillation values, average bit error rate () is evaluated where the intensity has log-normal distribution. Scintillation indices of collimated annular beams are found for fixed primary source size1s , varying annular beam thickness, propagation distance L, source size , the rate of dissipation of the mean s, the rate of dissipation of the mean squared temperature, non-dimensional parameter representing the relative strength of temperature T and salinity fluctuation w. versus the source size and the average signal to noise found for the collimated annular beams are exhibited for various rate of dissipation of turbulent kinetic energy per unit mass of fluid  and source sizes . At the stated link lengths, as secondary source size of s annular beam equals to zero, that is, for Gaussian beam, will offer more advantages

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