Improving the performance of non-DC-biased optical OFDM with lazy lifting wavelet transform

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dc.contributor.authorAyvaz, Elif Nur
dc.contributor.authorOzen, Ali
dc.date.accessioned2025-03-17T12:27:35Z
dc.date.available2025-03-17T12:27:35Z
dc.date.issued2024
dc.departmentTarsus Üniversitesi
dc.description.abstractIn recent years, the lifting wavelet transform (LWT) has been used in image and signal processing applications to overcome many of the shortcomings of the classical discrete wavelet transform (DWT). The LWT is a simplified and most efficient version of the classical discrete wavelet transform. To address the issue of energy inefficiency in the direct current-biased optical OFDM (DCO-OFDM) waveform, the literature proposes the use of the non-direct current-biased optical OFDM (NDC-O-OFDM) waveform, which does not require the addition of DC bias. Firstly, this paper proposes improving the performance of the NDC-O-OFDM waveform by combining it with the LWT using the lazy wavelet (LLWT). However, the literature proposes the use of the generalized LED index modulation OFDM (GLIM-OFDM) waveform as a solution to the spectrum inefficiency problem of the NDC-O-OFDM waveform. As a second contribution, this paper presents the combination of the GLIM-OFDM waveform with the LLWT transform to enhance the performance of the GLIM-OFDM waveform. Numerical simulations were performed to evaluate the performance of the proposed LLWT-NDC-O-OFDM and LLWT-GLIM-OFDM waveforms in terms of bit error rate (BER) in 2 x 2 and 4 x 4 optical MIMO channel environments. The results show that the proposed waveforms provide a gain of approximately 6.5 dB over both the NDC-O-OFDM and GLIM-OFDM waveforms, and a gain of 13.5 dB over the DCO-OFDM waveform, while maintaining the same BER requirement of 1E-4 and modulation order of BPSK in both 2 x 2 and 4 x 4 optical MIMO channel scenarios. Thus, despite some increase in computational complexity due to LWT implementation, a spectrum and energy efficient high performance optical OFDM waveform is achieved with the proposed LLWT transform in this work.
dc.identifier.doi10.1007/s11107-024-01018-3
dc.identifier.endpage163
dc.identifier.issn1387-974X
dc.identifier.issn1572-8188
dc.identifier.issue3
dc.identifier.scopus2-s2.0-85193233209
dc.identifier.scopusqualityQ2
dc.identifier.startpage154
dc.identifier.urihttps://doi.org/10.1007/s11107-024-01018-3
dc.identifier.urihttps://hdl.handle.net/20.500.13099/2327
dc.identifier.volume47
dc.identifier.wosWOS:001226713800001
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherSpringer
dc.relation.ispartofPhotonic Network Communications
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20250316
dc.subjectOptical OFDM
dc.subjectDCO-OFDM
dc.subjectNDC-O-OFDM
dc.subjectGLIM-OFDM
dc.subjectLifting wavelet transform
dc.subjectEnergy efficiency
dc.titleImproving the performance of non-DC-biased optical OFDM with lazy lifting wavelet transform
dc.typeArticle

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