Performance analysis and comparison of NRZ-DQPSK optical wireless system with different filters under different weather conditions

Abstract The extensive use of wireless communication in recent years is due to the requirement of huge data transfer. Nowadays the optical wireless communication (OWC) in which the light is used for wireless connectivity is extensively used. Huge spectral resource, low bandwidth requirements and high speed of operation are the main asset of OWC. The major challenge of OWC system is the effect of different weather conditions as the air is used as a transmission medium in OWC. The variations in different weather conditions have a significant impact on the effectiveness of OWC system as they degrade the performance of OWC system. This paper compares the performance of NRZ-DQPSK OWC system with different filters (Bessel filer, Gaussian Filter and Trapezoidal filter) and the effect of different weather conditions (rain, haze and clear weather) on NRZ-DQPSK system is analyzed over different transmission distances. The comparison is done in terms of quality factor or Q-factor.