Performance Analysis of ACO-OFDM based VLC System with CRC-Aided-SCL Polar Code

Desalegn, Tegenu

BDU IR Home
→
Bahir Dar Institute of Technology (BiT)
→
Faculty of Electrical and Computer Engineering
→
Communication System Engineering
→
thesis
→
View Item

dc.contributor.author	Desalegn, Tegenu
dc.date.accessioned	2023-06-19T12:37:14Z
dc.date.available	2023-06-19T12:37:14Z
dc.date.issued	2023-03-06
dc.identifier.uri	http://ir.bdu.edu.et/handle/123456789/15411
dc.description.abstract	A visible light communication (VLC) system would be an excellent choice for indoor downlink access and data transmission and it is often done by intensity modulation and direct detection (IM/DD), in which the electrical signal must be turned into a real-valued and nonnegative waveform in order to drive light emitting diodes (LEDs). Conventional forward error correction (FEC) codes can not provide two lighting related features, dimming support and flicker mitigation. Because of the narrow bandwidth of LEDs and the existing coding approaches, transmission efficiency and error correction performance are low. In this research, the BER performances of the BPSK, 4-QAM and 16-QAM asymmetrically clipped optical orthogonal frequency division multiplexing (ACO-OFDM) signal with polar code and flicker mitigation using Manchester coding are investigated over VLC channel. To increase the transmission capacity and error control performance of a VLC system, ACO-OFDM and cyclic redundancy check aided successive cancellation list (CRC-Aided-SCL) are used, which provide significant error-correction performance in the regime of low signal to noise ratio (SNR). The simulation result show that the CRC-Aided-SCL algorithm achieved BER of 10 −5 and run length value of 2 with optical clock rate of 0.1MHz using Manchester coding while the spectral efficiency (SE) was 13.15, 13.38 and 13.6 bps/Hz for BPSK, 4-QAM and 16-QAM, respectively. We also compared the complexity of SCL and SC algorithm and obtained 18432 and 4608,respectively, using list size 4 and N=256 without consideration of iteration. Generally, the error control performance can be increased by polar code and better transmission efficiency by ACO-OFDM is achieved. Keywords: ACO-OFDM, CRC-Aided-SCL, Flicker mitigation, VLC.	en_US
dc.language.iso	en_US	en_US
dc.subject	Electrical and Computer Engineering	en_US
dc.title	Performance Analysis of ACO-OFDM based VLC System with CRC-Aided-SCL Polar Code	en_US
dc.type	Thesis	en_US