Sofia B. Amado
University of Aveiro
32 Papers
157 Citations
Sofia B. Amado is an academic researcher from University of Aveiro. The author has contributed to research in topics: Digital signal processing & Volterra series. The author has an hindex of 10, co-authored 32 publications.
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Papers
Fully Blind Linear and Nonlinear Equalization for 100G PM-64QAM Optical Systems
Fernando P. Guiomar,Sofia B. Amado,Andrea Carena,Gabriella Bosco,Antonino Nespola,Antônio Lúcio Teixeira,Armando N. Pinto +6 more
TL;DR: In this paper, the authors demonstrate fully blind processing and reduced-complexity nonlinear equalization (NLE) of a 100G PM-64QAM optical channel in a 50 GHz WDM grid, achieving a maximum reach of 1524 km over pure silica core fiber at a bit error rate of $2.7
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Time-Domain Volterra-Based Digital Backpropagation for Coherent Optical Systems
TL;DR: In this article, a closed-form time-domain (TD) Volterra series nonlinear equalizer (VSNE) was proposed for the mitigation of Kerr-related distortions in coherent optical transmission systems.
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Low Complexity Advanced DBP Algorithms for Ultra-Long-Haul 400 G Transmission Systems
Sofia B. Amado,Fernando P. Guiomar,Nelson J. Muga,Ricardo B. Ferreira,Jacklyn D. Reis,Sandro M. Rossi,Andrea Chiuchiarelli,Juliano R. F. Oliveira,Antônio Lúcio Teixeira,Armando N. Pinto +9 more
TL;DR: The W-VSNE technique is shown to be more accurate than the correspondent weighted SSFM (W-SSFM) algorithm when applied in medium (10-50 DBP Steps) and low complexity (<;5 DBP steps) regimes.
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Multicarrier Digital Backpropagation for 400G Optical Superchannels
Fernando P. Guiomar,Sofia B. Amado,Ricardo B. Ferreira,Jacklyn D. Reis,Sandro M. Rossi,Andrea Chiuchiarelli,Juliano R. F. Oliveira,Antônio Lúcio Teixeira,Armando N. Pinto +8 more
TL;DR: In this article, the performance and complexity of multicarrier digital backpropagation (DBP) for dual-and triple-carrier 400G superchannels based on polarization-multiplexed (PM) 16QAM and 64QAM modulation was evaluated.
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Coherent Nyquist UDWDM-PON With Digital Signal Processing in Real Time
Ricardo B. Ferreira,Jacklyn D. Reis,Sandro M. Rossi,Sofia B. Amado,Fernando P. Guiomar,Ali Shahpari,Juliano R. F. Oliveira,Armando N. Pinto,Antônio Lúcio Teixeira +8 more
TL;DR: In this paper, the authors report real-time transmitter and receiver for a future coherent PON with high spectral efficiency and low-cost DSP implementation using field-programmable gate array (FPGA)-based 8-bit DSP, and experimentally demonstrate a high performance system based on 16 × 2.5 Gb/s QPSK signals.
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