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dc.contributor.authorLin, Chi-Hsiangen_US
dc.contributor.authorLin, Chun-Tingen_US
dc.contributor.authorWei, Chia-Chienen_US
dc.contributor.authorChi, Sienen_US
dc.date.accessioned2019-04-03T06:40:57Z-
dc.date.available2019-04-03T06:40:57Z-
dc.date.issued2017-10-30en_US
dc.identifier.issn1094-4087en_US
dc.identifier.urihttp://dx.doi.org/10.1364/OE.25.027750en_US
dc.identifier.urihttp://hdl.handle.net/11536/144006-
dc.description.abstractThis paper presents a DFT/IDFT-free receiving scheme for spread-OFDM signals. Leveraging sub-Nyquist sampling and proper sampling delay, the proposed scheme enables each user to receive the requested data without the need for DFT and IDFT; thus, the complexity at receiver can be greatly reduced. Nonetheless, DC component is altered in an AC coupling system, such that severe waveform distortion is caused when the process of DFT/IDFT is omitted. Thus, a DC-zeroing algorithm is proposed to guarantee constant DC after sub-Nyquist sampling, thereby eliminating such distortion. To experimentally verify the concept of proposed scheme, a 27.15-Gbit/s optical spread-OFDM signal was transmitted over fiber and received by the DFT/IDFT-free scheme with sub-Nyquist sampling. More users will reduce the required sampling rate at receiver; for the case of 16 users, the required sampling rate for the 27.15-Gbit/s signal is as low as 1 GSample/s. The experimental results show that error-free transmission was achievable, and the penalty due to lowering sampling rate (i.e., increasing the number of users) is insignificant. (C) 2017 Optical Society of Americaen_US
dc.language.isoen_USen_US
dc.titleDFT/IDFT-free receiving scheme for spread-OFDM signals employing low-sampling-rate ADCsen_US
dc.typeArticleen_US
dc.identifier.doi10.1364/OE.25.027750en_US
dc.identifier.journalOPTICS EXPRESSen_US
dc.citation.volume25en_US
dc.citation.issue22en_US
dc.citation.spage27750en_US
dc.citation.epage27757en_US
dc.contributor.department光電系統研究所zh_TW
dc.contributor.departmentInstitute of Photonic Systemen_US
dc.identifier.wosnumberWOS:000413995000117en_US
dc.citation.woscount1en_US
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