Nonlinear Pre-Distortion in DML-based OFDM Transmission Enabled by Low-Complexity Sparse Volterra Filtering

Ku, Kuang-Yu; Yu, Yu-Cheng; Chi, Shiuan-Mao; Wei, Chia-Chien

doi:10.1364/ofc.2022.th1h.7

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…According to Equation (15), we analyze the algorithm complexity of the three equalizers. Table 1 shows a comparison of the complexity of the three equalizers, including the number of taps and multiplications.…”

Section: The Construction Of a Simplified Equalizermentioning

confidence: 99%

“…Thus, many scholars have worked to simplify such equalizers. For example, a sparse Volterra filter has been proposed to realize nonlinear pre-distortion in DML-based OFDM transmission, in which the proposed pre-distorter is specially designed to prevent significant changes in the powers of transmitted subcarriers [15]. There are also researchers proposing and experimentally demonstrating a trellis-compression MLSE in a 210 Gb/s PAM-8 signal transmission over a 2 km SSFM transmission.…”

Section: Introductionmentioning

confidence: 99%

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A Decision Feedback Equalization Algorithm Based on Simplified Volterra Structure for PAM4 IM-DD Optical Communication Systems

Xie

et al. 2023

Applied Sciences

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A novel simplifying Volterra structure algorithm is proposed for an intensity modulation direct detection (IM-DD) optical fiber short distance communication system using the decision feedback equalization algorithm (DFE). Based on this algorithm, the signal damage for the four-level pulse amplitude modulation signal (PAM-4) is compensated, which is caused by device bandwidth limitation and dispersion during transmission. Experiments have been carried out using a 25 GHz Electro-absorption Modulated Laser (EML), showing that PAM-4 signals can transmit over 10 km in standard single-mode fiber (SSMF). The 112 Gbps and 128 Gbps signals can reach the error rate threshold of KP4-FEC (BER = 2 × 10−4) and HD-FEC (BER = 3.8 × 10−3), respectively. The simplified principle and process of the proposed Volterra-based equalization algorithm are presented. Experimental results show that the algorithm complexity is greatly reduced by 75%, which provides effective theoretical support for the commercial application of this algorithm.

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Section: The Construction Of a Simplified Equalizermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Decision Feedback Equalization Algorithm Based on Simplified Volterra Structure for PAM4 IM-DD Optical Communication Systems

Xie

et al. 2023

Applied Sciences

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Simple and Precise Characterization of Full-Field Frequency Response for Coherent TOSA

Wu,

Li,

Zhou

et al. 2024

J. Lightwave Technol.

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A decision feedback equalization algorithm based on simplified Volterra structure for PAM4 IM-DD optical communication system

Xie¹,

He²,

Li³

et al. 2023

Preprint

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A novel simplifying Volterra structure algorithm is proposed for intensity modulation direct detection (IM-DD) optical fiber short distance communication system by using the decision feedback equalization algorithm (DFE). Based on this algorithm, the signal damage for four-level pulse amplitude modulation signal (PAM-4) is compensated, which is caused by device bandwidth limitation and dispersion during transmission. Experiments have been carried out using a 25GHz Electro-absorption Modulated Laser (EML), showing that PAM-4 signals can transmit over 10km in standard single-mode fiber (SSMF). The 112Gbps and 128Gbps signals can reach the error rate threshold of KP4-FEC (BER=2*10-4) and HD-FEC (BER=3.8*10-3), respectively. The simplified principle and process of proposed Volterra-based equalization algorithm are presented. Experimental results show that the algorithm complexity is greatly reduced by 75%, which provides an effective theoretical support for the commercial application of this algorithm.

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Nonlinear Pre-Distortion in DML-based OFDM Transmission Enabled by Low-Complexity Sparse Volterra Filtering

Abstract: A nonlinear pre-distorter is proposed in DML-based OFDM transmission. The complexity of pre-distorter is reduced by > 90% using the ℓ0-regularization, ℓ1-regularization, or re-orthogonalization, and the data rate is still increased by > 50% after ≥ 150-km fiber.

Cited by 3 publications

References 7 publications

A Decision Feedback Equalization Algorithm Based on Simplified Volterra Structure for PAM4 IM-DD Optical Communication Systems

A Decision Feedback Equalization Algorithm Based on Simplified Volterra Structure for PAM4 IM-DD Optical Communication Systems

Simple and Precise Characterization of Full-Field Frequency Response for Coherent TOSA

A decision feedback equalization algorithm based on simplified Volterra structure for PAM4 IM-DD optical communication system

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