Recursive Clipping for Channel Estimation in VLC Systems


Abdulkafi, Ayad Atiyah and Hussein, Yaseein Soubhi and Alias, Mohamad Yusoff (2020) Recursive Clipping for Channel Estimation in VLC Systems. Solid State Technology, 63 (2s). pp. 3069-3077. ISSN 0038-111X

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Orthogonal frequency division multiplexing (OFDM) is extensively utilized in visible light communication (VLC) systems to achieve high rate transmission. This paper provides a new technique with two-step peak clipping (TSPC) scheme to specifically mitigate the high peak-to-average power ratio (PAPR) in clipped and pilot-aided optical OFDM in VLC system. The basic idea is to directly clip the peak power on the positions of pilots in the frequency domain before inserting the pilots’ symbols. The second step employs clipping the OFDM signal in the time domain. This may degrade the bit-error-rate (BER), therefore we have implemented channel estimation algorithm to enhance BER. Several algorithms for channel estimation have been investigated to verify the effectiveness of the proposed TSPC scheme in OFDM based VLC system. Simulation results show that our approach can effectively improve channel estimation and VLC system performance in terms of both PAPR reductions and BER performance.

Item Type: Article
Uncontrolled Keywords: Channel estimation; Clipping; PAPR; OFDM; VLC.
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK9001-9401 Nuclear engineering. Atomic power
Divisions: Faculty of Engineering (FOE)
Depositing User: Ms Rosnani Abd Wahab
Date Deposited: 24 Sep 2021 02:49
Last Modified: 24 Sep 2021 02:49


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