Open AccessPerformance analysis of amplify–decode‐and‐forward multihop binary phase‐shift keying/free‐space optical systems using avalanche photodiode receivers over atmospheric turbulence channels
Author(s) -
Pham Thanh V.,
Pham Anh T.
Publication year - 2014
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.2013.0422
Subject(s) - avalanche photodiode , keying , free space optical communication , subcarrier , computer science , bit error rate , electronic engineering , noise (video) , relay , physics , monte carlo method , phase shift keying , topology (electrical circuits) , optical communication , telecommunications , optics , channel (broadcasting) , electrical engineering , engineering , detector , mathematics , statistics , orthogonal frequency division multiplexing , power (physics) , quantum mechanics , artificial intelligence , image (mathematics)
This study studies the performance of multihop free‐space optical systems using the subcarrier binary phase‐shift keying modulation over atmospheric turbulence channels. The authors propose a modified relaying strategy, termed ‘amplify–decode‐and‐forward’, realised by using avalanche photodiode (APD) receivers. The outage probability of the proposed system is analytically derived considering the atmospheric turbulence and the receiver noise, including APD shot noise and thermal noise. The analytical results are verified by Monte Carlo simulations, and a good agreement between the analytical and simulation results is confirmed. In the authors’ analysis, they quantitatively discuss the impact of turbulence strength, number of relay nodes, relaying configuration, system bit rate and receiver parameters on the system outage probability. In addition, the optimal value of APD gain for achieving the lowest outage probability in different cases of relaying configuration, number of relays and receiver parameters is also discussed.