An Energy Efficient Based Enhanced Optical OFDM for SISO and MIMO Visible Light Communication System in Indoor Environment

摘要

Recent developments in wireless digital communication have made Visible Light Communication (VLC) a promising technology. Comparatively speaking, the VLC system used in this task offers better performance and efficiency. In this study, a modified Optical Orthogonal Frequency Division Multiplexing (indoor VLC communication model) was proposed. To overcome channel capacity restrictions caused by a constrained LED modulation bandwidth, MIMO VLC systems must meet the high Signal-to-Noise Ratio (SNR) criteria needed for SISO channel LED lighting. Generalized Frequency Division Multiplexing (GFDM), Space-Time Block Coded OFDM (STBC-OFDM), and Electro-Optical OFDM (EO-OFDM) are frequently compared and contrasted in wideband technology (Enhanced Optical OFDM). The suggested system, when compared to other systems, increases BER (Bit Error Rate) performance and throughput for all MIMO via SISO VLC communication channel gains that may be available. The suggested approach keeps the standard method's data rate constant while BER is improved by 20 dB and 10-5. EO-OFDM offers better data rates than OFDM, but is less effective than PAPR, according to research on channels with limited bandwidth (peak-to-average power ratio). To assess the SNR throughput of the proposed EO-OFDM scheme in comparison to O-OFDM, OAK-OFDM, and PWM-OFDM in order to get a throughput of 20 Mbit/s. In comparison to MIMO-based O-OFDM, OAK-OFDM, and STBC-OFDM, the suggested EO-OFDM technology runs at speeds faster than 7.6 Mbits/s. This experiment's overall performance is superior to state-of-the-art considering that LEDs are linear and have a constrained dynamic range.