Open AccessFlexible spectrum sharing of two asynchronous phase-shift keying signals using power division multiplexing
Author(s) -
Peicheng Liao,
Kaiheng Zou,
Huibin Zhou,
Ahmad Fallahpour,
Nanzhe Hu,
Yinwen Cao,
Ahmed Almaiman,
Fatemeh Alishahi,
Changjing Bao,
Moshe Tur,
Alan E. Willner
Publication year - 2020
Publication title -
optics letters/optics index
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.383931
Subject(s) - phase shift keying , keying , asynchronous communication , bit error rate , multiplexing , computer science , quadrature amplitude modulation , physics , modulation (music) , optics , amplitude and phase shift keying , signal (programming language) , spectral density , electronic engineering , telecommunications , channel (broadcasting) , acoustics , engineering , programming language
We numerically and experimentally report flexible spectrum sharing of two asynchronous phase-shift keying (PSK) signals using power division multiplexing. We show that a hybrid quadrature-amplitude-modulated signal is generated when two PSK signals with different power levels are superposed. By using successive interference cancellation, a 20 Gbaud "strong" signal combined with a 9 or 4 Gbaud "weak" signal can be recovered sequentially with bit-error rate performance below the forward error correction threshold. In addition, we show the dependence of system performance on the power ratio between the strong and weak signals. These two signals can contain different baudrates, pulse shapes, and modulation formats.