Comparison between 2D DCO OFDM and 2D ACO OFDM systems for optical camera communication

Abstract

In this paper various forms of optical OFDM (orthogonal frequency division multiplexing) have been investigated that are suitable for optical camera communication systems. The distinction is rendered by evaluating bit error rate versus signal to noise ratio of optical camera communication systems but, it is power effective for higher SNR values. This was because the DC bias used in DCO-OFDM is unreliable as for the optical capacity, whereas utilizing just half the subcarriers to transport data in ACO-OFDM in term of bandwidth is unsuccessful. In addition to that this research will focused on optical camera communication system and implementation in the case of use for two modes of OFDM which produce the clipping noise but they will gain SNR in overall if we choose well clipping factor. We found that ACO OFDM is better because lower bit loading. In this paper the analysis of BER versus SNR ratio for two optical wireless communication systems has been studied for different clipping factors 0.8, 1, and 2. The BER performance of the two forms of optical OFDM is also compared with single-carrier modulation approach to demonstrate the reliable performance of the proposing system. This system has been implemented using Lab-view 2019 software.