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https://hdl.handle.net/20.500.13091/4427
Title: | Channel Estimation in Visible Light Communication Systems: the Effect of Input Signal-Dependent Noise | Authors: | Yaseen, M. Canbilen, Ayse Elif İkki, S. |
Keywords: | Bayesian Cramér-Rao lower bound channel estimation Channel estimation least square Light emitting diodes linear minimum mean square error maximum likelihood Maximum likelihood estimation maximum posteriori probability Mean square error methods Modulation Radio frequency signal dependent shot noise Visible light communication Visible light communication Channel estimation Errors Frequency estimation Intelligent systems Light emitting diodes Mean square error Monte Carlo methods Radio waves Visible light communication Bayesian Bayesian crame-rao low bound Crame-Rao lower bounds Cramer Rao lower bound Least Square Lightemitting diode Linear minimum mean square errors Ma ximum likelihoods Maximum posteriori probability Maximum-likelihood Maximum-likelihood estimation Mean-square-error methods Posteriori probability Radiofrequencies Signal dependent shot noise Maximum likelihood estimation |
Publisher: | Institute of Electrical and Electronics Engineers Inc. | Abstract: | Visible light communication (VLC) has been proposed as a promising way for next generation wireless communication networks to mitigate the scarcity of the radio frequency (RF) spectrum, and has consequently attracted much attention. This paper introduces a single-input single-output (SISO) VLC system under the joint effects of statistical random channel and signal-dependent shot noise (SDSN). Moreover, it estimates the channel of the considered system using maximum likelihood (ML), least square (LS), linear minimum mean square error (LMMSE), maximum posteriori probability (MAP) and minimum mean square error (MMSE) estimators. Furthermore, a Bayesian Cramér-Rao lower bound (BCRLB) is derived for the proposed system and it is compared to the mean square error (MSE) of the proposed estimators. The problem of unknown SDSN factor, <inline-formula><tex-math notation="LaTeX">$\zeta ^{2}$</tex-math></inline-formula>, at the receiver side is discussed and two solutions are investigated. The receiver of a VLC system under SDSN and random channel gain <inline-formula><tex-math notation="LaTeX">$h$</tex-math></inline-formula> is designed and its BER is studied. Finally, Monte Carlo simulation results of the proposed estimators, which show the dramatic effect of the SDSN on the considered system, are provided. In particular, the presence of noise variance, as well as the SDSN factor, causes an increase in the MSE of the system, while increasing the power reinforces the system performance. IEEE | URI: | https://doi.org/10.1109/TVT.2023.3282779 https://hdl.handle.net/20.500.13091/4427 |
ISSN: | 0018-9545 |
Appears in Collections: | Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collections WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collections |
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