Coherent demodulation of microwave signals by using optical heterodyne technique with applications to point to point indoor wireless communications systems

Autor:	A. G. Rojas-Hernández, Alejandro García-Juárez, Ignacio E. Zaldivar-Huerta, Jorge Rodríguez-Asomoza, G. Aguayo-Rodriguez, M R Gómez-Colín
Rok vydání:	2011
Předmět:	Physics History Point-to-point business.industry Local oscillator Transmitter Optical communication Physics::Optics Photodetector Computer Science Applications Education Optics Demodulation business Microwave Computer Science::Information Theory Optical communications repeater
Zdroj:	Journal of Physics: Conference Series. 274:012008
ISSN:	1742-6596
DOI:	10.1088/1742-6596/274/1/012008
Popis:	An optical communications system using a couple microstrip antennas for distributing point to point analog TV with coherent demodulation based on optical heterodyne in close vicinity is reported in this paper. In the proposed experimental setup, two optical waves at different wavelengths are mixed and applied to a photodetector. Then a beat signal with a frequency equivalent to the spacing of the two wavelengths is obtained at the output of the photodetector. This signal corresponds to a microwave signal located at 1.25 GHz, which it is used as a microwave carrier in the transmitter and as a local oscillator in the receiver of our optical communication system. The feasibility of this technique is demonstrated transmitting a TV signal of 66-72MHz.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::832f6ba01a167cf5295338057706b3c5 https://doi.org/10.1088/1742-6596/274/1/012008 Zobrazit plný text záznamu