Дата проведення: 11/01/10 - 11/23/10
Реєстрація до 20 листопада 2010 року
Місце проведення: Portugal
Організатор: Institute for Systems and Computer Engineering of Porto
Type of grant: Competition, For scientific researches,Scholarships
Special conditions:The grant holder can receive additionalpayments by participating in complementary contracts or projects thatcontribute to the work plan
NESC PORTO is acceptingapplications to award grants to graduates, to work in the under-mentionedResearch project, in the framework of Scientific Research and TechnologicalDevelopment Projects, supported and managed by FCT – Fundação para a Ciência ea Tecnologia (Science & Technology Foundation).
Work Area: Wireless and OpticalCommunications
Description of the work to becarried out: Hybrid fibre-radio technology is a very attractive system conceptto support the deployment of broadband microwave wireless communicationssystems. In this frequency band Gb/s data rates are possible only if cell sizeis reduced considerably. The so-called pico-cellular optical-wireless accesswith few meters range cells are being considered as a highly promising routefor delivering high bandwidth and mobility access for in-building applications.A major challenge towards economically viable pico-cellular RoF networks is toimplement low cost cell transponders with high efficient electrical and opticalfunctionalities. In this project it is proposed to investigate electricaloptical (E/O) uplink and optical-electrical (O/E) downlink transponderfunctions using non-linear circuits based on the integration of resonant tunnelingdiode (RTD) oscillators with laser diodes (LD) and photo-detectors (PDs),respectively. The main advantages of these circuits are their intrinsic RFsignals amplification and circuit simplicity, which makes them low-cost andmore reliable.
Objectives to be accomplished bythe Grant holder: Collaboration in the characterization of the optoelectronicconverters based on the RTD diode and determination of the optimum operatingconditions for clock recovery in optical systems at Gb/s transmission rates. Design,implementation, characterization and demonstration of RTD-based transceiversoperating at 2.4 GHz. Test-bed demonstrations of optical-wireless RoFcommunication links based on the optoelectronic transceivers developed.