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The objective of the study is to simulate frequency shift keying (FSK)/amplitude shift keying (ASK) modulation schemes with raised cosine line coding based free space optics channel in clear weather conditions. The max.  Q  and optical signal/noise ratio (OSNR) with FSO channel length variations are simulated for the previous and proposed models at DRs of 10 Gbps, and also the max.  Q  factor with data rate (DR) variations is demonstrated for the previous and proposed models at 10 km FSO channel length. Max.  Q , min. BER, signal power (SP), noise power, and total optical power (TOP) based FSK and ASK modulation schemes are illustrated through APD receiver with FSO channel length of 10 km.

Free space optics communication channel with amplitude/frequency shift keying modulation technique based raised cosine line coding