Hyder Ali Tajuddin IN, Othman M, Homam MJ, Jamil A, M. Audah LH, Abdullah MFL, et al. Comparison of Advanced Modulation Techniques of Free Space Optical Link for Ground-to-Train Communication . IJIE [Internet]. 2025 Jul. 27 [cited 2026 Apr. 9];17(2):279-8. Available from: https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/16364