Assessing the influence of digital modulation methods on LTE over fiber for 5G systems implementation

Mohd Adenan, Muhammad Daniel Azroq (2024) Assessing the influence of digital modulation methods on LTE over fiber for 5G systems implementation. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

This research is to simulate mmW 5G system with QAM and QPSK digital modulation techniques using Optisystem software. The output signal was observed in terms of eye diagram, BER and Q-factor. The performance is evaluated based on modulation of QPSK, 16QAM, 64QAM and 256QAM over bit rates of 10 Gbps and 40 Gbps, wavelength of 1550 nm and 1310 nm and distance from 5km to 100km respectively. The optimum performance is set following ITU standard at BER of 1E-12 and Q-factor greater than 8. QPSK shows robustness over long distances up to 80km and 50 km for 1550nm and 1310nm wavelength at 10Gbps respectively. 16QAM demonstrates better BER and Q-factor than 64QAM and 256QAM due to wider constellation spacing. Overall, 10 Gbps modulation performs better than 40GBps, meeting ITU standards with lower dispersion and attenuation issues.

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