Abstract
In this paper, we analyse the error performance of transmitter/receiver array free-space optical (FSO) communication system employing binary phase shift keying (BPSK) subcarrier intensity modulation (SIM) in clear but turbulent atmospheric channel. Subcarrier modulation is employed to eliminate the need for adaptive threshold detector. Direct detection is employed at the receiver and each subcarrier is subsequently demodulated coherently. The effect of irradiance fading is mitigated with an array of lasers and photodetectors. The received signals are linearly combined using the optimal maximum ratio combining (MRC), the equal gain combining (EGC) and the selection combining (SelC). The bit error rate (BER) equations are derived considering additive white Gaussian noise and log normal intensity fluctuations. This work is part of the EU COST actions and EU projects.
| Original language | English |
|---|---|
| Pages (from-to) | 61-73 |
| Journal | Communications Infrastructure: Systems and Applications in Europe (First International ICST Conference, EuropeComm 2009) |
| Volume | 16 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2009 |
| Event | The First International ICST Conference on Communications Infrastructure, Systems and Applications in Europe, EuropeComm 2009. London 11-13 August. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering - Duration: 1 Jan 2009 → … |
Keywords
- BPSK
- laser communications
- MIMO systems
- spatial diversity