Performance Comparison of ACO-OFDM with C-OFDM using 1024-QAM to Reduce BER in VLC System

Abstract

Bit Error Rate (BER) is decreased by evaluating the effectiveness of the novel Asymmetrically Clipped Optical Orthogonal Frequency Division Multiplexing (ACO-OFDM) and contrasting it to that of the more traditional Orthogonal Frequency Division Multiplexing (OFDM) (C-OFDM). In this paper, we evaluate the BER performance of ACO-OFDM versus that of traditional OFDM at <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\mathrm{n}=1024$</tex> and larger (constellation size). The BER is broken down into two categories for analysis purposes. A total of 20 samples makes up each group. Both ACO-OFDM and standard OFDM employ a sample size of twenty, with a pre-test power of eighty percent, an alpha of 0.05, and a beta of 0.2. With the aid of the MATLAB programme, we can compare the BER of ACO-OFDM to that of regular OFDM. The BER of the ACO-OFDM is significantly lower than that of the C-OFDM, which is 0.1. In order to convert a bipolar OFDM signal to a unipolar OFDM signal, DC bias is not necessary for ACO-OFDM, so the BER performance is enhanced. This result is statistically significant with a p-value of 0.001 (p-value less than 0.05). When compared to conventional OFDM with 1024-QAM, the experimental ACO-OFDM shows very high BER.