Interpolated Band-pass Method Based Narrow-band FIR Filter : A Prospective Candidate in Filtered-OFDM Technique for the 5G Cellular Network

Orthogonal frequency division multiplexing (OFDM), being a significant aspect of multicarrier modulation (MCM), is accomplished to encounter the effect of multipath reception by splitting the entire allotted bandwidth into several narrow subbands which leads to an advancement in spectral efficiency and diminishes the effect of intersymbol interference (ISI). However, OFDM fails to meet the requirements of high data rate communication networks such as 5G. To achieve the ever increasing demand of 5G cellular networks, this paper presents an innovative filtered-OFDM (F-OFDM) technique based on narrow-band finite impulse response filter which is operated on interpolated band-pass method (IBM). Simulation results show that the F-OFDM with IBM based narrow-band finite impulse response filter (FIR) accomplishes shorter out-of-band emission (OOBE) compared to the F-OFDM designed with some state-of-the-art narrow transition band filtering techniques.