Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor | Department of Electrical Engineering | en_US |
| dc.contributor.advisor | Lau, Pak Tao Alan (EE) | en_US |
| dc.contributor.advisor | Lu, Chao (EIE) | en_US |
| dc.contributor.advisor | Tam, Haw-yaw (EE) | en_US |
| dc.creator | Zhou, Gai | - |
| dc.identifier.uri | https://theses.lib.polyu.edu.hk/handle/200/11453 | - |
| 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 in nonlinear frequency division multiplexing systems | en_US |
| dcterms.abstract | The field of nonlinear Fourier transform (NFT) and nonlinear frequency division multiplexing (NFDM) has gained attention in the community. The NFT framework decomposes the nonlinear Schrodinger equation (NLSE) into parallel channels and decomposes the signal into nonlinear spectral components, which can be obtained by solving the Zakharov-Shabat problem from the Lax pair operators corresponding to the NLSE. In this case, the NFT/inverse-NFT (INFT) operators transform the signal between time-domain and the nonlinear frequency domain. Hasegawa and Nyu first proposed to use the NFT concept for nonlinear fiber transmissions in which information can be transmitted on the eigenvalues of the nonlinear channels without interfering with each other [1]. The concept is further combined with advances in digital coherent technology and generalized into NFDM. NFDM is considered a generalized theoretical framework for nonlinear fiber transmissions in the sense that continuous spectrum resembles conventional orthogonal frequency division multiplexing (OFDM) while discrete spectrum (eigenvalues) resemble solitons. In practical transmission, various impairments like fiber loss, optical amplification, and amplified spontaneous emission (ASE) noise significantly degrade and complicate the transmission of NFDM signals. Characterizing the impairments and exploit relative DSPs is important in the development of the NFDM system. This thesis focuses on discrete-spectrum modulation, analyzing interaction distortion among neighboring solitons during transmission. Various DSP schemes are proposed which includes designing a specific soliton-train on the transmitter side and incorporate with receiver multi-symbol DSPs to compensate inter-symbol interference after transmission. | en_US |
| dcterms.extent | 114 pages : color illustrations | en_US |
| dcterms.isPartOf | PolyU Electronic Theses | en_US |
| dcterms.issued | 2021 | en_US |
| dcterms.educationalLevel | Ph.D. | en_US |
| dcterms.educationalLevel | All Doctorate | en_US |
| dcterms.LCSH | Signal processing -- Digital techniques | en_US |
| dcterms.LCSH | Hong Kong Polytechnic University -- Dissertations | en_US |
| dcterms.accessRights | open access | en_US |
Copyright Undertaking
As a bona fide Library user, I declare that:
- I will abide by the rules and legal ordinances governing copyright regarding the use of the Database.
- I will use the Database for the purpose of my research or private study only and not for circulation or further reproduction or any other purpose.
- I agree to indemnify and hold the University harmless from and against any loss, damage, cost, liability or expenses arising from copyright infringement or unauthorized usage.
By downloading any item(s) listed above, you acknowledge that you have read and understood the copyright undertaking as stated above, and agree to be bound by all of its terms.
Please use this identifier to cite or link to this item:
https://theses.lib.polyu.edu.hk/handle/200/11453