Author
Ardakani, Maryam Haghighi, Uysal, Murat
Publication Date
2017
Publication Place
-
IEEE
Subject
Optical wireless communication, Ultraviolet communication, OFDM, Cooperative transmission
Type
Periodical
Language
English
Digital
Yes
Manuscript
No
Library
Özyeğin University
Library Asset ID
1536-1276
Record ID
9118a9e4-ddbb-4be4-9ff1-9c0e378e62c1
Library Location
Electrical & Electronics Engineering
Date
2017
Sample Text
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
