Résumé:
The Orthogonal Multiple Access (OMA) transmission has fulfilled the ever-growing demand for data in wireless communications. However, the OMA transmission system is subdued by limitations that distort its waveforms from achieving the effective requirements for Fifth Generation (5G) Frequency One (FR1). In Orthogonal Frequency Division Multiplexing (OFDM) for example, the excessive Spectral Leakage (SL) and high Peak Average Power Ratio (PAPR) affect its Spectrum Efficiency (SE). To control these OFDM limitations as well as mitigate interferences, Cyclical Prefix-OFDM (CP-OFDM) was developed but is also observed to cause a waste of bandwidth and increase power consumption. The Filtered-OFDM (F-OFDM) technique is also noticed to reintroduce interference at 0.4 MHz when subjected to Advanced Interference Evaluation (AIE). Results showed that the F-OFDM system achieved better performance than earlier OMA techniques through improved SE and Bit Error Rate (BER). The results showed that the F-OFDM system achieved an interference control of -39dBmW/Hz which outperforms that of CP-OFDM and OFDM which obtained -35dBmW/Hz and -32dBmW/Hz, respectively. Furthermore, the results of the Hanning-induced F-OFDM channel access achieved a BER within 10-5 better than those of CP-OFDM and OFDM driven within 10-4 at 26 dB Signal to Noise Ratio (SNR).
