Performance Study of 100-Gb/s Super-Nyquist QPSK and Nyquist 8QAM over 25-GHz Spacing

Author

Shaoliang Zhang ; Yue-Kai Huang ; Yaman, Fatih ; Inada, Yoshihisa

Author_Institution

NEC Labs. America, Inc., Princeton, NJ, USA

Volume

27

Issue

13

fYear

2015

fDate

July1, 1 2015

Firstpage

1445

Lastpage

1448

Abstract

To enable a 100 Gb/s over 25-GHz long-haul transmission solution, Nyquist 8-ary quadrature-amplitude modulation (QAM) and super-Nyquist quadrature phase-shifted keying (QPSK) are promising candidates. Nyquist 8QAM is experimentally demonstrated to have slightly better nonlinear tolerance than super-Nyquist QPSK at the same bit rate. The super-Nyquist QPSK signal suffers higher performance fluctuation depending on bandwidth squeezing.

Keywords

nonlinear optics; optical communication equipment; quadrature amplitude modulation; quadrature phase shift keying; Nyquist 8-ary quadrature-amplitude modulation; Nyquist 8QAM; bandwidth 25 GHz; bandwidth squeezing; bit rate 100 Gbit/s; higher performance fluctuation; long-haul transmission solution; nonlinear tolerance; superNyquist QPSK signal; superNyquist quadrature phase-shifted keying; Bandwidth; Finite impulse response filters; Maximum likelihood estimation; Phase shift keying; Receivers; Signal to noise ratio; 8QAM; DSP; MLSE; QPSK; Super-Nyquist; long-haul; super-Nyquist;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2015.2425352

Filename

7091906