This study numerically investigates the symbol-level allocation of four-level pulse-amplitude modulation (PAM4) signals for optically pre-amplified receiver systems. Three level-allocation schemes are examined: intensity-equispaced, amplitude-equispaced, and numerically optimized. Numerical simulations are conducted to comprehensively compare the receiver sensitivities for these level-allocation schemes under various system conditions. The results show that the superiority or inferiority between the level allocations is significantly dependent on the system conditions of the bandwidth of amplified spontaneous emission light, modulation bandwidth, and signal extinction ratio (ER). The mechanisms underlying these dependencies are also discussed.
Hiroki KAWAHARA
Osaka University
Koji IGARASHI
Osaka University
Kyo INOUE
Osaka University
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Hiroki KAWAHARA, Koji IGARASHI, Kyo INOUE, "Level Allocation of Four-Level Pulse-Amplitude Modulation Signal in Optically Pre-Amplified Receiver Systems" in IEICE TRANSACTIONS on Communications,
vol. E106-B, no. 8, pp. 652-659, August 2023, doi: 10.1587/transcom.2022EBP3162.
Abstract: This study numerically investigates the symbol-level allocation of four-level pulse-amplitude modulation (PAM4) signals for optically pre-amplified receiver systems. Three level-allocation schemes are examined: intensity-equispaced, amplitude-equispaced, and numerically optimized. Numerical simulations are conducted to comprehensively compare the receiver sensitivities for these level-allocation schemes under various system conditions. The results show that the superiority or inferiority between the level allocations is significantly dependent on the system conditions of the bandwidth of amplified spontaneous emission light, modulation bandwidth, and signal extinction ratio (ER). The mechanisms underlying these dependencies are also discussed.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2022EBP3162/_p
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@ARTICLE{e106-b_8_652,
author={Hiroki KAWAHARA, Koji IGARASHI, Kyo INOUE, },
journal={IEICE TRANSACTIONS on Communications},
title={Level Allocation of Four-Level Pulse-Amplitude Modulation Signal in Optically Pre-Amplified Receiver Systems},
year={2023},
volume={E106-B},
number={8},
pages={652-659},
abstract={This study numerically investigates the symbol-level allocation of four-level pulse-amplitude modulation (PAM4) signals for optically pre-amplified receiver systems. Three level-allocation schemes are examined: intensity-equispaced, amplitude-equispaced, and numerically optimized. Numerical simulations are conducted to comprehensively compare the receiver sensitivities for these level-allocation schemes under various system conditions. The results show that the superiority or inferiority between the level allocations is significantly dependent on the system conditions of the bandwidth of amplified spontaneous emission light, modulation bandwidth, and signal extinction ratio (ER). The mechanisms underlying these dependencies are also discussed.},
keywords={},
doi={10.1587/transcom.2022EBP3162},
ISSN={1745-1345},
month={August},}
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TY - JOUR
TI - Level Allocation of Four-Level Pulse-Amplitude Modulation Signal in Optically Pre-Amplified Receiver Systems
T2 - IEICE TRANSACTIONS on Communications
SP - 652
EP - 659
AU - Hiroki KAWAHARA
AU - Koji IGARASHI
AU - Kyo INOUE
PY - 2023
DO - 10.1587/transcom.2022EBP3162
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E106-B
IS - 8
JA - IEICE TRANSACTIONS on Communications
Y1 - August 2023
AB - This study numerically investigates the symbol-level allocation of four-level pulse-amplitude modulation (PAM4) signals for optically pre-amplified receiver systems. Three level-allocation schemes are examined: intensity-equispaced, amplitude-equispaced, and numerically optimized. Numerical simulations are conducted to comprehensively compare the receiver sensitivities for these level-allocation schemes under various system conditions. The results show that the superiority or inferiority between the level allocations is significantly dependent on the system conditions of the bandwidth of amplified spontaneous emission light, modulation bandwidth, and signal extinction ratio (ER). The mechanisms underlying these dependencies are also discussed.
ER -