A virtual-tree OFDMA PON system architecture

Maria C. Yuang*, Po-Lung Tien, Jyehong Chen, Ju Lin Shih, Dar Zu Hsu, Hsing Yu Chen, Chia Chien Wei

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations


OFDM PON has been considered to be one of the most prominent next-generation broadband wired access solutions. However, based on the current tree-architecture, existing OFDM PON systems face severe challenges when increasing the scalability and data-rate performance. In this paper, we propose a novel virtual-tree architecture of an OFDMA PON system (VTOPS). Coupled with the use of inexpensive direct modulation, VTOPS simultaneously achieves high reliability, scalability, and spectrum efficiency (i.e., high data rate) in a cost-effective manner. Theoretical and experimental results demonstrate that, by applying the pre-emphasis algorithm and subchannel adaptive modulation, VTOPS achieves 40-Gb/s downlink and uplink transmissions using low-cost 10-GHz directly modulated lasers.

Original languageEnglish
Title of host publication2012 IEEE International Conference on Communications, ICC 2012
Number of pages6
StatePublished - 1 Dec 2012
Event2012 IEEE International Conference on Communications, ICC 2012 - Ottawa, ON, Canada
Duration: 10 Jun 201215 Jun 2012

Publication series

NameIEEE International Conference on Communications
ISSN (Print)1550-3607


Conference2012 IEEE International Conference on Communications, ICC 2012
CityOttawa, ON


  • Direct Modulation
  • External Modulation
  • Orthogonal Frequency Division Multiple Access (OFDMA)
  • Passive Optical Network (PON)


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