Study on indoor optical wireless communication systems with denoising

Abstract

An innovative method for noise rejection in an indoor optical wireless communication OWC system using wavelet-based signal denoising is proposed in this research In the future indoor optical wireless communication systems will require of high bandwidth high data rate and highly secure communications for their indoor applications Currently an optical wireless communication system is considered as an alternative technology for Radio Frequency RF wireless communication system since it provides large bandwidth license free the data rate is in Gbps and consumes less power The indoor OWC links offer excellent security to the data light signal does not penetrate the walls So the same wavelength can be reused in an adjacent room The light signal is also less sensitive to electromagnetic interference The use of the optical spectrum as a wireless medium for short-range wireless data communication is discussed in this research An OWC prefers white LED for both illumination and wireless communication simultaneously Moreover white LEDs can give much higher data rates than RF wireless communication It is experimentally implemented by using Intensity Modulation and Direct Detection IM/DD The various ambient noise sources sunlight incandescent and fluorescent lights that affect the performance of transmission in an indoor optical wireless communication system is studied On-Off Keying OOK Pulse Position Modulation PPM Binary Phase Shift Keying BPSK and Orthogonal Frequency Division Multiplexing OFDM are studied in this research The optical wireless system using BPSK modulation is proposed for high-capacity indoor applications and measured the performance of the indoor OWC system by received power SNR BER and path loss The error bar on SNR with distance is depicted newline