Abstract
A multi-objective optimization was implemented to increase the spectral efficiency of direct-detection optical orthogonal frequency division multiplexing (OFDM) systems with constant-envelope (CE) signals. Based on a genetic algorithm, the optimization procedure evaluates the impact of fiber injection power in the reduction of the guard band between the optical carrier and the CE-OFDM signals, optimizing important parameters such as electrical phase modulation and optical modulation indices of the denominated DDO-CE-OFDM system. Simulation results show that a guard-band reduction around 40% was achieved in a 4 Gbps optimized DDO-CE-OFDM system with 16-QAM subcarrier mapping and -7 dBm fiber input power. Results obtained in an experimental proof-of-concept conducted to validate the optimization procedure show that this reduction can reach 66\% according to a power penalty of 2 dB demanded by the inherent spectral broadening of CE-OFDM signals, after propagation over 40 km of standard single-mode fiber.
| Original language | English |
|---|---|
| Article number | 8640082 |
| Pages (from-to) | 2155-2162 |
| Number of pages | 8 |
| Journal | Journal of Lightwave Technology |
| Volume | 37 |
| Issue number | 9 |
| DOIs | |
| Publication status | Published - 1 May 2019 |
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Keywords
- Constant-envelope optical OFDM
- multi-objective optimization
- NSGA II
- spectral efficiency
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Increasing the spectral efficiency of DDO-CE-OFDM systems by multi-objective optimization. / de Rocha, Helder Roberto O.; Dias, Vinicius O.C.; da Veiga Pereira, Esequiel; Nunes, Reginaldo Barbosa; Segatto, Marcelo E.V.; Silva, Jair A.L. (Corresponding author).
In: Journal of Lightwave Technology, Vol. 37, No. 9, 8640082, 01.05.2019, p. 2155-2162.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - Increasing the spectral efficiency of DDO-CE-OFDM systems by multi-objective optimization
AU - de Rocha, Helder Roberto O.
AU - Dias, Vinicius O.C.
AU - da Veiga Pereira, Esequiel
AU - Nunes, Reginaldo Barbosa
AU - Segatto, Marcelo E.V.
AU - Silva, Jair A.L.
PY - 2019/5/1
Y1 - 2019/5/1
N2 - A multi-objective optimization was implemented to increase the spectral efficiency of direct-detection optical orthogonal frequency division multiplexing (OFDM) systems with constant-envelope (CE) signals. Based on a genetic algorithm, the optimization procedure evaluates the impact of fiber injection power in the reduction of the guard band between the optical carrier and the CE-OFDM signals, optimizing important parameters such as electrical phase modulation and optical modulation indices of the denominated DDO-CE-OFDM system. Simulation results show that a guard-band reduction around 40% was achieved in a 4 Gbps optimized DDO-CE-OFDM system with 16-QAM subcarrier mapping and -7 dBm fiber input power. Results obtained in an experimental proof-of-concept conducted to validate the optimization procedure show that this reduction can reach 66\% according to a power penalty of 2 dB demanded by the inherent spectral broadening of CE-OFDM signals, after propagation over 40 km of standard single-mode fiber.
AB - A multi-objective optimization was implemented to increase the spectral efficiency of direct-detection optical orthogonal frequency division multiplexing (OFDM) systems with constant-envelope (CE) signals. Based on a genetic algorithm, the optimization procedure evaluates the impact of fiber injection power in the reduction of the guard band between the optical carrier and the CE-OFDM signals, optimizing important parameters such as electrical phase modulation and optical modulation indices of the denominated DDO-CE-OFDM system. Simulation results show that a guard-band reduction around 40% was achieved in a 4 Gbps optimized DDO-CE-OFDM system with 16-QAM subcarrier mapping and -7 dBm fiber input power. Results obtained in an experimental proof-of-concept conducted to validate the optimization procedure show that this reduction can reach 66\% according to a power penalty of 2 dB demanded by the inherent spectral broadening of CE-OFDM signals, after propagation over 40 km of standard single-mode fiber.
KW - Constant-envelope optical OFDM
KW - multi-objective optimization
KW - NSGA II
KW - spectral efficiency
UR - http://www.scopus.com/inward/record.url?scp=85064624215&partnerID=8YFLogxK
U2 - 10.1109/JLT.2019.2898945
DO - 10.1109/JLT.2019.2898945
M3 - Article
AN - SCOPUS:85064624215
VL - 37
SP - 2155
EP - 2162
JO - Journal of Lightwave Technology
JF - Journal of Lightwave Technology
SN - 0733-8724
IS - 9
M1 - 8640082
ER -