Pilot based Channel Estimation for Generalized Frequency Division Multiplexing (GFDM) System

Abstract

Orthogonal Frequency Division Multiplexing (OFDM) is a highly regarded technique used in the 4G mobile communication systems to provide reliable communication and high data rates. Due to the orthogonality between its sub carriers, it provides a very high data rate and reliability as compared to the 3G communication systems. However, it cannot be used in the next generation cellular system i.e. 5G. Advancements need to be made or new multiplexing schemes are to be introduced. A new technique Generalized Frequency Division Multiplexing (GFDM) has been proposed to meet the demands of the next generation systems, which are higher data rates than 4G, minimum response time, lower power consumption etc. GFDM is a non-orthogonal, multicarrier scheme, which is being widely researched for the new wireless communication system. This research focuses on the channel estimation of a GFDM system. The goal is to use the pilot symbols and their placements within the data packet for the channel estimation of the GFDM system. Two pilot symbol placement schemes are proposed in this research and simulation results are compared with the previous works. The results of the research show quite an improvement.