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Appl. Sci. 2017, 7(2), 184; doi:10.3390/app7020184

Calculation of Receiver Sensitivities in (Orthogonal) Subcarrier Multiplexing Microwave-Optical Links

Radio and Optical Communication Lab, School of Electronic Engineering, Dublin City University, Glasnevin, Dublin 9, Ireland
Aston Institute of Photonics Technologies, Aston University, Aston Triangle, Birmingham B4 7ET, UK
Author to whom correspondence should be addressed.
Academic Editor: Paolo Minzioni
Received: 16 December 2016 / Revised: 9 February 2017 / Accepted: 13 February 2017 / Published: 15 February 2017
(This article belongs to the Special Issue Optical Modulators and Switches)
View Full-Text   |   Download PDF [770 KB, uploaded 15 February 2017]   |  


Microwave-based all-analogue (orthogonal) subcarrier multiplexing (SCM) permits a direct processing of baseband data at Gbit/s while achieving low power consumption, low latency, low cost, and tolerance to dispersion. A key figure of merit in any SCM link is the sensitivity in the receiver, which depends on the transmitter, the link and the receiver. By analysing the impact of the nonlinearities of an optical IQ modulator in the presence of optical noise, sensitivities are mathematically estimated as a function of the optical modulation index (OMI) at the transmitter. The results are verified with simulations achieving a good agreement with the mathematical model. The theoretical model provided can be employed as a tool to predict the best achievable sensitivities and the optimum OMI in broadband SCM and orthogonal SCM links. View Full-Text
Keywords: subcarrier multiplexing; orthogonal subcarrier multiplexing; optical IQ modulator; direct detection subcarrier multiplexing; orthogonal subcarrier multiplexing; optical IQ modulator; direct detection

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Gutiérrez, F.A.; Martin, E.P.; Perry, P.; Ellis, A.D.; Barry, L.P. Calculation of Receiver Sensitivities in (Orthogonal) Subcarrier Multiplexing Microwave-Optical Links. Appl. Sci. 2017, 7, 184.

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