Performance analysis of 160 Gbps single channel FSO transmission with integrated polarization division multiplexing-orthogonal frequency division multiplexing across various Indian cities

This paper presents a comprehensive simulative analysis of a high-speed single-channel integrated Single Mode Fiber (SMF)-Free Space Optics (FSO) transmission link employing Integrated Polarization Division Multiplexing-Orthogonal Frequency Division Multiplexing (PDM-OFDM) technology across diverse urban environments in India. The study investigates the performance metrics including bit error rate (BER), error vector magnitude (EVM) %, optical signal-to-noise ratio (OSNR) in decibels (dB), and received optical power (dBm) to assess the efficacy of the proposed system under varying atmospheric conditions and geographical locations. Four major Indian cities, namely Chandigarh, Chennai, Jodhpur, and Srinagar, have been selected as representative locations for the analysis. The length of SMF is fixed at 50 km. The simulations reveal notable differences in the achievable FSO link range based on the performance metrics across these cities. Chandigarh demonstrates a maximum link range of 1700 m, while Chennai achieves the farthest transmission distance of 2500 m. Srinagar and Jodhpur exhibit link ranges of 1600 m and 2250 m, respectively. These results highlight the impact of atmospheric conditions and geographical factors on the performance of FSO transmission systems.The findings presented in this paper contribute to the optimization of FSO communication systems for urban deployments in India, offering valuable insights for network planners and designers. Additionally, the methodology and results presented herein can serve as a benchmark for future research endeavours aimed at enhancing the performance and reliability of FSO links in diverse geographical settings.