The aim of this research is to investigate performance metrics such as bit-error-rate (BER), throughput, spectral efficiency, peak-to-average power ratio (PAPR) and one-way latency for the different modulation scheme used in a 5G wireless network. The Quadrature Phase Shift Keying (QPSK), 16QAM (16-Quadrature Amplitude Modulation), 64QAM and 256QAM were studied for signal to noise ratio (SNR) ranging from -10dB to 20dB at intervals of 5dB. It was experimentally demonstrated through MATLAB simulation that the efficiency of the 5G network in various aspects depends on the modulation coding scheme (MCS) used. The QPSK MCS exhibited the best performance in BER with 0 bps at all SNRs, throughput of 100%, PAPR of 3dB and one-latency of 1.75ms. However, it suffered a major drawback in spectral efficiency because of the small modulation order. The 256QAM might be the choicest of all considering its number of bits per symbol mapping when the SNR is around 10 to 15dB. However, it performs very poorly when the signal to noise ratio is low, largely due to the reduced hamming distance between the symbols, making it prone to Inter Symbol Interference (ISI). At the worst SNR of -10dB, 256QAM has a BER of 0.5008bps, 0% throughput, maximum PAPR of 7dB and latency of 5.25ms with a block error probability of 1. The 64QAM modulation scheme exhibits a good compromise at a reasonable SNR of 5dB. It has a BER of 0.0, achieves a throughput of 100% and a spectral efficiency of 0.0295 bps/Hz.

Modulation, fifth generation, performance, bit-error-rate, throughput, spectral efficiency, peak-to-average power ratio, one-way latency

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