Title :
A 560 Mbit/s FSK modulation/heterodyne detection free space optical link
Author :
Nawaz, Muhammad ; Pescod, C.R.
Author_Institution :
Optical Commun. Group, GEC-Marconi Res. Centre, Chelmsford, UK
Abstract :
Reviews the performance of heterodyne and homodyne coherent detection techniques and their advantages over a direct detection system. Theoretical analysis and factors affecting the design of a frequency shift keyed (FSK) modulation/heterodyne detection optical link using a nonsynchronous dual filter demodulation system suitable for intersatellite link (ISL) use is discussed. The design of the various subsystems including the optical transmitter, optical receiver, optical interfaces, IF amplifier, frequency discriminator and FSK data demodulator are described for an experimental system currently being constructed
Keywords :
digital communication systems; frequency shift keying; optical communication equipment; optical links; optical modulation; satellite relay systems; signal detection; 560 Mbit/s; FSK data demodulator; FSK modulation; IF amplifier; direct detection system; free space optical link; frequency discriminator; frequency shift keyed; heterodyne detection; homodyne coherent detection; intersatellite link; nonsynchronous dual filter demodulation system; optical interfaces; optical receiver; optical transmitter;
Conference_Titel :
Optical Intersatellite Links and On-Board Techniques, IEE Colloquium on
Conference_Location :
London
