Performance Analysis of GFDM System using LDGT for Varying Window

Future 5G wireless applications require improved data rate, low delay, efficient usage of spectrum, reduced out of band emissions (OOB) and implementation complexities. Generalized Frequency Division Multiplexing (GFDM) is one of the new 5G carrier waveform candidate which meets the 5G applications requirements nicely when matched with Orthogonal Frequency Division Multiplexing (OFDM). However, the GFDM has some disadvantages such as Inter-Symbol Interference (ISI), Inter-Carrier Interference (ICI) and implementation complexities. It's not possible to obtain a reliable communication with GFDM signal which has more severe effects on interferences and noises. To eliminate interference in communication system local DGT algorithms were used with proposed new type of prototype filtering. The proposed filtering will have separate filters for odd subcarriers and even subcarriers respectively. It introduces the orthogonality conditions which will be used to get rid of interferences in the communication systems. Simulation results shows that the suggested GFDM system has better BER performance when compared to the traditional GFDM system. In future we can directly apply some channel estimation algorithms and different MIMO antenna configurations in the modified GFDM system for improved performances.