D, Kumar, Anilkumar R, Vijayakumar C N, and S Bhargavi. “Performance Analysis of Direct Detection Optical OFDM Systems”. International Journal of Engineering and Technology 7, no. 1.9 (March 1, 2018): 123–128. Accessed May 13, 2025. https://mail.sciencepubco.com/index.php/IJET/article/view/9747.