DC Component Recovery in Kramers-Kronig Receiver Utilizing AC-Coupled Photo-Detector

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dc.contributor.authorBo, Tianwaiko
dc.contributor.authorKim, Hoonko
dc.date.accessioned2020-08-25T04:55:17Z-
dc.date.available2020-08-25T04:55:17Z-
dc.date.created2020-08-19-
dc.date.created2020-08-19-
dc.date.created2020-08-19-
dc.date.issued2020-08-
dc.identifier.citationJOURNAL OF LIGHTWAVE TECHNOLOGY, v.38, no.16, pp.4307 - 4314-
dc.identifier.issn0733-8724-
dc.identifier.urihttp://hdl.handle.net/10203/275941-
dc.description.abstractThe Kramers-Kronig (KK) receiver has recently drawn a great deal of attention due to its capability to extract the complex-valued electric field of optical signal from the directly detected signal. One practical issue is the recovery of the DC component lost upon the reception using an AC-coupled photo-detector. Due to the nonlinear operation of KK algorithm, it is necessary to recover the DC value of the signal before executing the algorithm. A common method to estimate the DC component was to sweep the DC value added to the detected signal, while measuring the system performance metrics such as bit-error ratio (BER). In this article, we propose and demonstrate a simple one-step DC recovery method for KK receiver. By inserting a zero-padded preamble in the modulation data and measuring a couple of statistical averages of the detected AC-coupled signal, we can estimate the DC component accurately even when the carrier-to-signal power ratio (CSPR) is low. Thus, this method estimates the DC component rapidly without time-consuming and power-hungry signal processing such as demodulation and BER calculation. We carry out a series of computer simulations and experiments to measure the accuracy of the proposed method. The results show that the proposed method incurs negligible sensitivity penalties compared with the conventional DC-sweep method. Also, provided in this paper is the design guideline on the proposed method.-
dc.languageEnglish-
dc.publisherIEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC-
dc.titleDC Component Recovery in Kramers-Kronig Receiver Utilizing AC-Coupled Photo-Detector-
dc.typeArticle-
dc.identifier.wosid000554904400012-
dc.type.rimsART-
dc.citation.volume38-
dc.citation.issue16-
dc.citation.beginningpage4307-
dc.citation.endingpage4314-
dc.citation.publicationnameJOURNAL OF LIGHTWAVE TECHNOLOGY-
dc.identifier.doi10.1109/JLT.2020.2990905-
dc.contributor.localauthorKim, Hoon-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorOptical transmitters-
dc.subject.keywordAuthorOptical filters-
dc.subject.keywordAuthorAmplitude modulation-
dc.subject.keywordAuthorOptical receivers-
dc.subject.keywordAuthorOptical sensors-
dc.subject.keywordAuthorOptical modulation-
dc.subject.keywordAuthorOptical receiver-
dc.subject.keywordAuthordigital signal processing-
dc.subject.keywordAuthordirect detection-
dc.subject.keywordPlusSUBCARRIER MODULATION-
dc.subject.keywordPlusTRANSMISSION-
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