Yazar
Ardakani, Maryam Haghighi, Uysal, Murat
Basım Tarihi
2017
Basım Yeri
-
IEEE
Konu
Optical wireless communication, Ultraviolet communication, OFDM, Cooperative transmission
Tür
Süreli Yayın
Dil
İngilizce
Dijital
Evet
Yazma
Hayır
Kütüphane
Özyeğin Üniversitesi
Demirbaş Numarası
1536-1276
Kayıt Numarası
9118a9e4-ddbb-4be4-9ff1-9c0e378e62c1
Lokasyon
Electrical & Electronics Engineering
Tarih
2017
Örnek Metin
Ultraviolet (UV) communication enables non-line-of-sight (NLOS) outdoor wireless connectivity and is particularly desirable to relax or eliminate pointing and tracking requirements of infrared links. In comparison to infrared counterparts, UV links are subject to relatively higher path loss as well as intersymbol interference resulting from frequency selective nature of the channel. In this paper, we propose the powerful combination of relay-assisted transmission and multi-carrier architecture based on orthogonal frequency division multiplexing (OFDM). Specifically, we consider a cooperative diversity system with orthogonal cooperation protocol and use DC-biased optical OFDM as the underlying physical layer. We consider both amplify-and-forward (AF) and detect-and-forward (DF) relaying. We investigate the error rate performance of the proposed relay-assisted OFDM UV system under consideration and demonstrate performance gains over point-to-point OFDM UV systems. We further determine optimal power allocation schemes to improve the performance. We also propose a variable-rate UV OFDM system and improve system throughput via bit loading.
DOI
10.1109/TWC.2016.2626438
Cilt
16
