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BER Minimized Beamforming Technique for VLC Multiuser MIMO

Visible Light Communication (VLC) based light emitting diodes (LEDs) has pay great interest due to its high data rate and efficiency. In this paper, we aim to increase the efficiency by increasing the rate for a visible light communication and to minimise the BER for MIMO system deployed with beamforming. For increasing the data rate, GaN based LED is used because it has smaller carrier lifetime and lower junction capacitance. On-off keying (OOK) and Pulse-amplitude modulation (PAM) are taken into use for high speed communication. The interference may occur by any mobile obstacles could affect transmitted data and thus increases the BER. To improve the BER performance, we implemented optical beamforming technique to decrease the total interference and to increase the signal-to-noise ratio (SNR). Simulation results depicts the bit error rate (BER) performance with modulation scheme and without modulation scheme and illustrate the received power at the detector.