Diversity combining in hybrid RF/FSO systems with PSK modulation
Paper i proceeding, 2011

We present a novel architecture for hybrid radio frequency (RF)/ free space optical (FSO) wireless systems without feedback or channel state information (CSI) at the transmitter. Under the assumption that 60 GHz RF and FSO systems support the same data rates, the proposed implementation transmits the same data over both links, using phase shift keying (PSK) as a common modulation scheme, and combines the signals from each individual link at the receiver on a symbol-by-symbol basis. Two popular diversity combining schemes are considered, namely, selection combining (SC) and maximal ratio combining (MRC), while tractable analytical approximations for the bit error rate (BER) are obtained. Investigations over various weather conditions and link distances revealed that the proposed implementation fully exploits the complementary nature of RF and FSO channels, even when one of the two available links fails. Furthermore, the comparison of the combining schemes demonstrates MRC as the optimum combining scheme, offering link distance gains compared to SC.


N. D. Chatzidiamantis

Aristotle University of Thessaloniki

George K. Karagiannidis

Aristotle University of Thessaloniki

Emmanouil E. Kriezis

Aristotle University of Thessaloniki

Michail Matthaiou

Signaler och system, Signalbehandling och medicinsk teknik, Signalbehandling

IEEE International Conference on Communications

05361486 (ISSN)

Art. no. 5962684- 5962684


Informations- och kommunikationsteknik


Elektroteknik och elektronik