Abstract A secured optical chaotic transmission using radio over free space optical (RoFSO) link is proposed. A dual multiplexed configuration is implemented to enhance the data transmission rate and channel capacity. Chaotic masking is done for individual data stream before multiplexing at MDM and PDM levels. Enhanced security level and low signal attenuation is observed while transmitting through RoFSO link. The FSO link performance is analyzed for various atmospheric attenuation and turbulence conditions. For weak to moderate and strong turbulence conditions, the FSO link is analyzed for various haze, rain, fog and dust conditions. The system bit error rate (BER), Q-factor, signal to noise ratio (SNR) and received signal power is observed while analyzing eye diagram, signal spectrum and electric constellation etc. Results show enhanced channel capacity and extended link range while using chaos based synchronous transmission.
Sood et al. (2026) studied this question.