Hybrid SSB OFDM-Digital Filter Multiple Access PONs

Wei Jin (Corresponding author), Abdulai Sankoh, Yixian Dong, Zhu Qiang Zhong, Roger Philip Giddings, Maurice O'Sullivan, Jeffrey Lee, Tim Durrant, Jianming Tang

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Samenvatting

The previously reported hybrid orthogonal frequency division multiplexing-digital filter multiple access (OFDM-DFMA) PONs offer promising solutions for seamlessly converging optical and mobile networks for 5G. However, the hybrid OFDM-DFMA PONs based on intensity-modulation and direct-detection (IMDD) convey double sideband (DSB) signals at different sub-wavelengths, this halves the spectral efficiency and signal transmission capacity. In this article, hybrid single sideband (SSB) OFDM-DFMA PONs are proposed and explored, for the first time, where multiple SSB OFDM channels produced without employing the Hilbert transform operation are multiplexed using orthogonal digital filtering in ONUs, and demultiplexed/demodulated by a single FFT operation in OLT without incorporating matching filters. It is shown that similar to the DSB PON, the proposed SSB PON has excellent robustness against digital filter characteristic variations and channel interferences. More importantly, it decreases peak-to-average power ratios (PAPRs) of digitally-filtered OFDM signals by >2 dB, thus leading to >2 dB reductions in optimum signal clipping ratio and >1 bit reductions in minimum required DAC/ADC resolution bits. For fixed spectral bandwidths, the SSB PON almost doubles the maximum upstream transmission capacity without considerably degrading its differential ONU optical launch power dynamic range compared to the DSB PON. While for fixed upstream signal transmission capacities, compared to the DSB PON, the SSB PON not only halves the overall signal transmission bandwidth, but also leads to >2.5 dB (>1.2 dB) improvements in power budget (differential optical launch power dynamic range for ONUs locating at high frequency regions).

Originele taal-2Engels
Artikelnummer8957557
Pagina's (van-tot)2095-2105
Aantal pagina's11
TijdschriftJournal of Lightwave Technology
Volume38
Nummer van het tijdschrift8
DOI's
StatusGepubliceerd - 15 apr. 2020
Extern gepubliceerdJa

Bibliografische nota

Funding Information:
Manuscript received August 30, 2019; revised December 23, 2019; accepted January 10, 2020. Date of publication January 13, 2020; date of current version April 15, 2020. This work was supported in part by the DESTINI project funded by the ERDF under the SMARTExpertise scheme, and in part by the DSP Centre funded by the ERDF through the Welsh Government. (Corresponding author: Wei Jin.) W. Jin, A. Sankoh, Y. Dong, Z.-Q. Zhong, R. P. Giddings, and J. Tang are with the School of Electronic Engineering, Bangor University, LL57 1UT Bangor, U.K. (e-mail: [email protected]; [email protected]; yixian.dong@ bangor.ac.uk; [email protected]; [email protected]; j.tang@ bangor.ac.uk).

Publisher Copyright:
© 1983-2012 IEEE.

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