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Comparison of OFDMA and GFDMA for next-generation pons

This paper examines and compares the use of orthogonal frequency division multiple access (OFDMA) and generalized frequency division multiple access (GFDMA) multicarrier formats in next-generation passive optical networks (PONs) through experimentation and numerical simulations. It is demonstrated t...

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Bibliographic Details
Published in:Journal of optical communications and networking 2017-12, Vol.9 (12), p.1064-1073
Main Authors: Saljoghei, Arsalan, Farhang, Arman, Browning, Colm, Perry, Philip, Marchetti, Nicola, Doyle, Linda E., Barry, Liam P.
Format: Article
Language:English
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Summary:This paper examines and compares the use of orthogonal frequency division multiple access (OFDMA) and generalized frequency division multiple access (GFDMA) multicarrier formats in next-generation passive optical networks (PONs) through experimentation and numerical simulations. It is demonstrated that GFDMA presents a high resilience toward multiple access interference (MAI) compared to OFDMA at the uplink channel of a PON. Moreover, two methods are proposed for achieving synchronization in the uplink channel of PONs, enabling high spectral efficiency. These proposed methods can lead to the elimination of inter-ONU guard bands, and facilitate overlapping inter-ONU subcarriers, while eliminating the effectsofMAI.Additionally,theperformanceofthesemulticarrier formats was analyzed in the downlink channel at a data rate of 15.6 Gb/s and a transmission span of 50 km where neglible performance penalty was observed.
ISSN:1943-0620
1943-0639
DOI:10.1364/JOCN.9.001064