Reduction of Bit Error Rate using Guard Interval Measurements for 5G Network

Orthogonal Frequency Division Multiplexing (OFDM) is reliable for improving the wireless performance of the 5G network. This multicarrier modulation is expected to have high speed and efficient signal transmission. However, it still suffers from high error and can cause signal interference, thus affecting the performance of the bit error rate (BER). The error can be minimized by utilizing Guard Interval (GI), which reduces signal interference and increases Spectral Efficiency (SE). Hence, this research focuses on optimizing GI evaluation for BER reduction, which balances multipath mitigation and data rate efficiency in the systems. A simulation was developed in MATLAB software with varying parameter numbers of Fast Fourier Transform (NFFT). It is observed that, the best GI implementation is based on number of NFFT, with 512, ¼ is the best for multiuser environment. Fewer error of the system leads to the better signal transmission efficiency in 5G network.