Comparative Analysis of OFDM, FBMC, UFMC & GFDM for 5G Wireless Communications
The major objectives of upcoming 5G communications is transmission of high peak data rates, low latency, best quality of service and higher channel capacity. To meet the above requirements some flexible waveform generation needed in the physical layer. Present 4G- LTE OFDM transmission not support for 5G communications due to major drawback such as Orthogonality of subcarriers, Out Of Band Radiation (OOBR),high Peak to Average Power Ratio (PAPR), Inter Carrier Interference (ICI) and Inter Symbol Interference (ISI). Along these lines, distinctive Multi-Carrier Modulation (MCM) systems are given to dive the disadvantages in OFDM, some modifications done in OFDM, which are result in a Filter Bank Multi Carrier (FBMC), Universal Filtered Multi-carrier (UFMC), and Generalized Frequency Division Multiplexing (GFDM). This article review the 5G candidate waveform generations, hardware requirements. Explained own advantages and disadvantages and finally compared them.
Keywords: 5G, MCM, FBMC, OFDM, GFDM, UFMC