Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor | Department of Electrical and Electronic Engineering | en_US |
| dc.contributor.advisor | Lau, Pak Tao Alan (EEE) | en_US |
| dc.creator | Xu, Chuang | - |
| dc.identifier.uri | https://theses.lib.polyu.edu.hk/handle/200/14357 | - |
| dc.language | English | en_US |
| dc.publisher | Hong Kong Polytechnic University | en_US |
| dc.rights | All rights reserved | en_US |
| dc.title | Digital signal processing for discrete nonlinear frequency division multiplexing transmission | en_US |
| dcterms.abstract | Nonlinear Frequency Division Multiplexing (NFDM) has attracted significant attention as a potential solution to overcome fiber nonlinearity in optical communication systems. Despite its theoretical elegance, the practical implementation of dual-polarization (DP) discrete NFDM has been hindered by the lack of a complete digital signal processing (DSP) frameworkâparticularly one that eliminates the need for training sequences and operates entirely within the nonlinear Fourier domain. This thesis presents two key advancements to address these limitations. Both are developed analytically and validated through numerical simulations as well as experimental demonstrations. | en_US |
| dcterms.abstract | First, the half back rotation algorithm is proposed as a simple yet effective equalization method for discrete NFDM systems. This algorithm restores the simplicity inherent to NFDM theory, eliminates the need for training sequences, and is shown to be optimal in performance. The theoretical analysis also provides an alternative proof of the Gordon-Haus effect in the language of NFT, and extends it to a phase-domain counterpart. | en_US |
| dcterms.abstract | Second, a blind polarization demultiplexing algorithm is developed specifically for discrete NFDM signals, enabling the realization of a full DSP flow for DP discrete NFDM systems. The DSP flow operates entirely in the nonlinear frequency domain and integrates the half back rotation algorithm with other standard DSP techniques. | en_US |
| dcterms.abstract | Furthermore, based on the refined noise model that accounts for both transfer noise and direct noise, the optimal symbol rate that minimizes the overall noise variance of a discrete NFDM system is identified. This finding offers a possible explanation for the historically low information rates observed in discrete NFDM systems. | en_US |
| dcterms.extent | xviii, 125 pages : color illustrations | en_US |
| dcterms.isPartOf | PolyU Electronic Theses | en_US |
| dcterms.issued | 2026 | en_US |
| dcterms.educationalLevel | Ph.D. | en_US |
| dcterms.educationalLevel | All Doctorate | en_US |
| dcterms.LCSH | Signal processing -- Digital techniques | en_US |
| dcterms.LCSH | Multiplexing | en_US |
| dcterms.LCSH | Optical communications | en_US |
| dcterms.LCSH | Hong Kong Polytechnic University -- Dissertations | en_US |
| dcterms.accessRights | open access | en_US |
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