Analysis of FBMC-OQAM over OFDM in Wireless Communication

OFDM (Orthogonal Frequency Division Multiplexing) system has prevailed as one of the most eminent multicarrier technique in 4G wireless communication. The purpose of this paper is to overthrow the drawbacks of OFDM and investigate new candidate waveform Filter Bank Multicarrier (FBMC) which is more compatible for 5G wireless communication through their performance results. Because of achieving sharper PSD, better BER performance curve and lower PAPR need to discard Cyclic Prefix (CP) with the help of Filter Banks. To alleviate ISI (Inter-Symbol-Interference) and ICI (Inter-Carrier-Interference), this paper focuses the working procedure about OQAM processing, spreading frequency and extended IFFT/FFT and it reveals how the filter banks are responsible to improve the system performance of FBMC. Consequently, simulation based results of FBMC have exhibited that the desired solution evidently outperforms OFDM schemes in terms of Spectral Efficiency, FBMC Out Of Band (OOB) emissions declines from -31dB to -58dB. Next, in terms of Bit Error Rate (BER), 16 QAM FBMC performance decays 27dB to approximately 20dB and 4 QAM FBMC have exhibited nearly 5dB lower than 4 QAM OFDM. Whereas, for Peak to Average Power Ratio (PAPR), OFDM CCDF performance curve drops from FBMC (16dB to 12dB).