Work

Pilot-Assisted Phase Recovery in Coherent Optical Receivers with Robust Locally Weighted Interpolation

Year: 2025

Type: article

Abstract: Accurate and low-complexity phase estimation is crucial for optimal data recovery in coherent optical receivers, especially for applications in emerging scenarios such as low-margin optical networks, green networks, probabilistic-shaping modulation, the use of high-order modulation formats in hollow-core fibers, long-haul links operating at low signal-to-noise ratios, and free-space optical links in low-earth orbit satellites, among others. These new developments demand highly efficient and reliable data transmission methods, even under stringent conditions of minimal operational excess margin. This paper introduces an efficient pilot-assisted phase estimation strategy for coherent optical receivers, integrating robust interpolation techniques for quasi-optimal operation. Our approach significantly enhances phase estimation accuracy, addressing the unique challenges posed by these new scenarios. Through comprehensive simulations, we illustrate our method’s superiority over conventional methods, showcasing marked improvements in computational complexity and bit error rate. The results highlight the critical role of sophisticated interpolation in bolstering pilot-assisted phase estimation, offering a promising technique for optimizing performance in next-generation coherent optical receivers.

Source: Photonics

DOI: 10.3390/photonics12040309

Authors: Carlos Carrión Betancourt, Veruska Rodrigues Moreira, Kayol Soares Mayer, Jonathan Aguiar Soares, Dalton Soares Arantes

Institution: Universidade Estadual de Campinas (UNICAMP)

Language: English

Topic: Optical Network Technologies

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,896

Funders: Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Secretaría de Educación Superior, Ciencia, Tecnología e Innovación