Abstract
Relay-assisted or multi-hop free space optical communications is an efficient solution that offers diversity, which can significantly improve the link availability. Albeit this potential, the turbulence-induced fading can still impact the system performance. This paper investigates through numerical simulations the effect of turbulence by comparing the bit error rate (BER) performance for all-optical and conventional amplify-and-forward dual-hop relaying systems. For the latter case, two options of the erbium-doped fiber amplifier (EDFA) and the semiconductor optical amplifier (SOA) are studied, showing that the advantages of the EDFA solution where EDFA outperforms SOA by ~3 dB in term of signal to noise ratio (SNR) for Rytov variance σ2R = 1.6 at a target BER of 10-5. Under the same turbulence regime, we further investigate the effect of aperture averaging in relay-assisted links and show that a significant BER improvement can be achieved. The results show that SNR gain of ~5.5 dB is achieved when the receiver aperture size increases from 100 mm to 300 mm at a target BER of 10-5.
Original language | English |
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Title of host publication | Proceedings of the 10th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP) |
Place of Publication | Piscataway |
Publisher | IEEE |
Pages | 1-5 |
ISBN (Print) | 978-1-5090-2526-8 |
DOIs | |
Publication status | Published - 22 Sept 2016 |
Event | 10th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP) - Prague Duration: 22 Sept 2016 → … |
Conference
Conference | 10th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP) |
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Period | 22/09/16 → … |