Intra-symbol frequency-domain averaging based channel estimation for coherent optical OFDM
Top Cited Papers
- 18 December 2008
- journal article
- Published by Optica Publishing Group in Optics Express
- Vol. 16 (26) , 21944-21957
- https://doi.org/10.1364/oe.16.021944
Abstract
We present an efficient channel estimation method for coherent optical OFDM (CO-OFDM) based on intra-symbol frequency-domain averaging (ISFA), and systematically study its robustness against transmission impairments such as optical noise, chromatic dispersion (CD), polarization-mode dispersion (PMD), polarization-dependent loss (PDL), and fiber nonlinearity. Numerical simulations are performed for a 112-Gb/s polarization-division multiplexed (PDM) CO-OFDM signal, and the ISFA-based channel estimation and the subsequent channel compensation are found to be highly robust against these transmission impairments in typical optical transport systems.Keywords
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