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Your search keyword '"Li, Xueyang"' showing total 18 results
Start Over Author "Li, Xueyang" Publisher optica publishing group
18 results on '"Li, Xueyang"'

9. Asymmetric self-coherent detection

Author

Li, Xueyang, primary, O’Sullivan, Maurice, additional, Xing, Zhenping, additional, Alam, Md Samiul, additional, Mousa-Pasandi, Mohammad E., additional, and Plant, David V., additional

Published
2021
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18. Experimental study of performance enhanced IM/DD transmissions combining 4D Trellis coded modulation with precoding.

Author

Xiang M, Xing Z, Li X, El-Fiky E, Morsy-Osman M, Zhuge Q, and Plant DV

Abstract

We propose to combine 4D trellis-coded modulation (TCM) with transmitter-side Tomlinson-Harashima precoding (THP) in IM/DD transmissions, and experimentally investigate the achieved performance improvement. Theoretically, THP can approximately produce an end-to-end additive white Gaussian noise (AWGN) channel even with severe bandwidth limitation, allowing TCM to maintain its coding gain in the presence of inter-symbol interference. In our experiments with off-the-shelf commercial components, which limit the 3 dB bandwidth of the system to be ~3.5 GHz, the combination of TCM and THP shows a better receiver sensitivity for various system bit rates from 56 Gbit/s to 112 Gbit/s, considering the KP4 threshold of BER = 2 × 10 -4 . In the 112 Gbit/s back-to-back (B2B) transmission, with the help of THP the receiver sensitivity is improved by 3.3 dB using 4D-PAM4 TCM at the KP4 FEC threshold compared with using conventional PAM4. In addition, combining TCM and THP also helps to lower the BER floor.

Published
2018
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