Journal article
Data-aided OSNR estimation for QPSK and 16-QAM coherent optical system
C Do, AV Tran, C Zhu, D Hewitt, E Skafidas
IEEE Photonics Journal | Published : 2013
Open access
Abstract
We propose an optical signal-to-noise ratio (OSNR) estimation technique using self-equalized complementary Golay sequences for both QPSK and 16-QAM coherent optical systems. The training sequences have complementary spectra, which enable accurate channel estimation and equalization, and have length-independent constellation for high-performance estimation. Estimation performances are verified through 100-and 40-Gb/s QPSK and 200-and 80-Gb/s 16-QAM coherent polarization-multiplexed optical systems, with an accuracy of 0.4 and 0.7 dB, in both simulations and experiments, respectively. © 2013 IEEE.
Grants
Funding Acknowledgements
NICTA is funded by the Australian Government as represented by the Department of Broadband, Communications, the Digital Economy, and the Australian Research Council through the ICT Centre of Excellence program.