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dc.contributor.authorBektas, E.B.
dc.contributor.authorPanayırcı, Erdal
dc.description28th Signal Processing and Communications Applications Conference, SIU 2020 --5 October 2020 through 7 October 2020 -- --166413en_US
dc.description.abstractVisible Light Communication(VLC) has been considered as a potential access option for 6G wireless systems to solve performance limitation due to bandwidth shortage at radio frequency (RF) band. In VLC system, illumination infrastructure has dual usage at the same time namely illumination and wireless data transmission. DC-Biased optical DCO-OFDM with clipping has been proposed for VLC systems to provide optically power efficient solution and easy implementation. Wireless communication systems generally require estimating and tracking the fading channel in order to detect transmitted data coherently. In this work, we propose a pilot-aided iterative channel estimation algorithm to efficiently estimate the optical channel coefficients of a clipped DCOOFDM system operating with additive white Gaussian noise (AWGN). The estimation algorithm is capable of improving the channel estimation by making use of pilot symbols with interpolation or using the channel estimate of previous OFDM block to obtain the next estimate for the iterative algorithm. In each iteration, the clipping noise is estimated and compensated in the frequency domain. Simulation results verify that the proposed channel estimation algorithm reduces the bit error rate (BER) and mean-square error (MSE) of channel estimate can be significantly. © 2020 IEEE.en_US
dc.publisherInstitute of Electrical and Electronics Engineers Inc.en_US
dc.relation.ispartof2020 28th Signal Processing and Communications Applications Conference, SIU 2020 - Proceedingsen_US
dc.subjectclipping noiseen_US
dc.subjectDC-biased optical orthogonal frequency division multiplexing (DCO-OFDM)en_US
dc.subjectpilot-aided iterative channel estimationen_US
dc.subjectVisible light communication (VLC)en_US
dc.subjectBit error rateen_US
dc.subjectData communication systemsen_US
dc.subjectFading (radio)en_US
dc.subjectFading channelsen_US
dc.subjectFrequency domain analysisen_US
dc.subjectGaussian noise (electronic)en_US
dc.subjectIterative methodsen_US
dc.subjectLight transmissionen_US
dc.subjectMean square erroren_US
dc.subjectOrthogonal frequency division multiplexingen_US
dc.subjectVisible light communicationen_US
dc.subjectWhite noiseen_US
dc.subjectAdditive White Gaussian noiseen_US
dc.subjectChannel estimation algorithmsen_US
dc.subjectIterative channel estimationen_US
dc.subjectPerformance limitationsen_US
dc.subjectPower-efficient solutionsen_US
dc.subjectVisible light communications (VLC)en_US
dc.subjectWireless communication systemen_US
dc.subjectWireless data transmissionen_US
dc.subjectChannel estimationen_US
dc.titleChannel Estimation for DCO-OFDM Based VLC Systems in the Presence of Clipping Noiseen_US
dc.title.alternativeDCO-OFDM Tabanli VLC Sistemlerde Kirpma Gurultusu Etkisinde Kanal Kestirimien_US
dc.relation.publicationcategoryKonferans Öğesi - Uluslararası - Kurum Öğretim Elemanıen_US

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