A faster-than-Nyquist PDM-16QAM scheme enabled by Tomlinson-Harashima precoding

Author

Chang, D. ; Omomukuyo, O. ; Dobre, O. ; Venkatesan, R. ; Gillard, P.

Author_Institution

Memorial Univ. of Newfoundland, St. John´s, NL, Canada

fYear

2015

Firstpage

1

Lastpage

4

Abstract

We present and numerically demonstrate a polarization-division multiplexing 16-ary quadrature amplitude modulation faster-than-Nyquist (FTN-PDM-16QAM) system enabled by the Tomlinson-Harashima precoding (THP). The THP module is located before the polarization separation module and it is shown that the modulo operator of the THP module at the receiver needs to be removed in order to fully optimize the performance of the soft-decision forward error correction (FEC). The impact of various parameters such as the modulo size factor, the 3-dB bandwidth and roll-off factor of the Nyquist filter on the performance of the FTN-PDM-16QAM system are also investigated. In addition, we compare the FTN-PDM-16QAM system with the PDM-16QAM Nyquist system in terms of the system performance and implementation complexity.

Keywords

filtering theory; forward error correction; modulation coding; optical modulation; optical receivers; precoding; quadrature amplitude modulation; FTN-PDM 16-ary quadrature amplitude modulation system; Nyquist filter roll-off factor; THP module; Tomlinson-Harashima precoding; faster-than-Nyquist polarization division multiplexing 16QAM system; optical receiver; polarization separation module; soft decision FEC performance; soft decision forward error correction performance; Bandwidth; Complexity theory; Decision feedback equalizers; Maximum likelihood estimation; Modulation; Optical filters; 16QAM; Tomlinson-Harashima precoding; faster-than-Nyquist; polarization-division multiplexing;

fLanguage

English

Publisher

ieee

Conference_Titel

Transparent Optical Networks (ICTON), 2015 17th International Conference on

Conference_Location

Budapest

Type

conf

DOI

10.1109/ICTON.2015.7193359

Filename

7193359