Open AccessSIMO subcarrier PSK FSO links with phase noise and non‐zero boresight pointing errors over turbulence channels
Author(s) -
Varotsos George K.,
Nistazakis Hector E.,
Gappmair Wilfried,
Sandalidis Harilaos G.,
Tombras George S.
Publication year - 2019
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2018.5608
Subject(s) - subcarrier , phase shift keying , phase noise , noise (video) , modulation (music) , physics , fading , computer science , free space optical communication , telecommunications , phase (matter) , optics , keying , electronic engineering , bit error rate , optical communication , orthogonal frequency division multiplexing , acoustics , channel (broadcasting) , engineering , quantum mechanics , artificial intelligence , image (mathematics)
Terrestrial free‐space optical (FSO) communication systems with subcarrier intensity modulation have experienced a particular research attention in the recent past. However, their performance strongly degrades in the presence of atmospheric turbulence, pointing errors, and phase noise impairments. In order to overcome these limitations, the authors consider a receiver diversity scheme of a typical subcarrier phase‐shift keying (PSK) system and investigate the performance by means of the average symbol error probability (ASEP). They assume a wide range of turbulence conditions, non‐zero boresight pointing errors, and phase noise strengths described through the gamma‐gamma, Beckmann, and Tikhonov distributions, respectively. Novel approximate ASEP expressions are derived for single‐input single‐output and single‐input multiple‐output (SIMO) configurations. Appropriate numerical results are depicted and validated by Monte Carlo simulations.