Simulation of WDM-OFDM Modulation Techniques in High Speed Optical Communication Systems

M. S. V. Vara Prasad, Dr. K. Krishna Murthy

Abstract: Advancements in optical transmitters, detectors, high purity optoelectronic material components and optical sources have made fibre optic technology, the world?s fastest growing communication technology, further highlighting the significance and importance of fibre optic communication. Bit error, Rate, Loss, Reliability and Security in communications have all been enhanced as a result of this revolution. Extremely low complexity, low cost, low power consumption, high data rate requirements have spurred great development of UWB Wired & Wireless communications in a variety of applications. An effort to employ a MATLB/SIMULINK based modulation technique OFDM, QAM and QPSK. Measurements were taken at various SMF distances and the BER and SNR values were recorded. When compared to other formats QPSK performs better on WDM PON systems. Using the graphical user interface of MATLAB, we want to conduct a study of the signal-to-noise ratio and the error probability. The error probability drops linearly from maximum to minimum as the signal-to-noise ratio increases, independent of the channel capacity. We can deduce that the QPSK format provides a significantly higher channel capacity in an OFDM communications systems. OFDM and coded OFDM optical communication networks make extensive use of the QPSK technique. When it comes to optical networks, QPSK provides more channel capacity than QAM. Different modulation systems like QAM and QPSK send signals across high-speed optical transport networks in different ways. The QPSK also helps shed light on the problem plaguing modem optical transmission systems.

Keywords: Fibre optic Communication (FOC), Orthogonal Frequency Division Multiplexing (OFDM) Systems, Signal to Noise Ratio (SNR), Bit Error Rate (BER), Quadrature Phase Shift Keying (QPSK), QPSK performance, Optical Networks

How to Cite?: M. S. V. Vara Prasad, Dr. K. Krishna Murthy, "Simulation of WDM-OFDM Modulation Techniques in High Speed Optical Communication Systems", Volume 14 Issue 12, December 2025, International Journal of Science and Research (IJSR), Pages: 644-648, https://www.ijsr.net/getabstract.php?paperid=SR251208142233, DOI: https://dx.doi.org/10.21275/SR251208142233