Hidayah M. YusriIrneza IsmailJuliza JamaludinWan Zakiah Wan IsmailMus'ab SahrimKhairul Nabilah Zainul ArifinSharma Rao Balakrishnan2024-05-302024-05-302020-12-25e-ISBN: 978-967-440-873-2https://kosist2020.wixsite.com/website/e-proceedinghttps://oarep.usim.edu.my/handle/123456789/17833E-Proceeding Kolokium Siswazah Fakulti Sains Dan Teknologi 2020 (KOSIST 2020) “Synergizing Innovation and Research Through Science and Technology” 9th December 2020 Organized by Faculty Science and TechnologyRadio over Free Space Optics (RoFSO) is believed to be the most reliable technology in future communication as it provides high speed, high bandwidth and low consumption energy for data transmission. However, some turbulence weather factor such as fog, haze and rain may cause data attenuation in the FSO network. This project presents the effect of haze attenuation on RoFSO transmission system for Orthogonal Frequency Division Multiplexing (OFDM) modulation technique with Quadrature Amplitude Multiplexing (QAM) scheme. The data obtained was referring to the Air Pollution Index (API) from the region of Sepang, one of the town in Malaysia. The system is modelled and simulated using a software called OptiSystem. The result performance of RoFSO system when being modulated by OFDM is compared in terms of the BER value, received optical power and constellation diagramen-USFree Space Optic (FSO), Radio over Free Space Optic (RoFSO), Orthogonal Frequency Division Multiplexing (OFDM), Air Pollution Index (API), constellation diagram.Article137141