Comparison of OFDMA and GFDMA for Next-Generation PONs

Arsalan Saljoghei, Arman Farhang, Colm Browning, Philip Perry, Nicola Marchetti, Linda E. Doyle, Liam P. Barry
<span title="2017-11-03">2017</span> <i title="The Optical Society"> <a target="_blank" rel="noopener" href="" style="color: black;">Journal of Optical Communications and Networking</a> </i> &nbsp;
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
more &raquo; ... 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 effects of MAI. Additionally, the performance of these multicarrier 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.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="">doi:10.1364/jocn.9.001064</a> <a target="_blank" rel="external noopener" href="">fatcat:gnkaszi3qzgs3phyknagwoccxq</a> </span>
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