Performance of OQAM based GFDM under Real-Time Fading Conditions
Pitchaiah Telagathoti1, Ravi Sekhar Yarrabothu2

1Pitchaiah Telagathoti, Department of ECE, Vignan’s Foundation for Science, Technology and Research Deem to be University, Vadlamudi (A.P), India.
2Ravi Sekhar Yarrabothu, Department of ECE, Vignan’s Foundation for Science, Technology and Research Deem to be University, Vadlamudi (A.P), India.
Manuscript received on 13 February 2019 | Revised Manuscript received on 04 March 2019 | Manuscript Published on 08 June 2019 | PP: 224-228 | Volume-7 Issue-5S4, February 2019 | Retrieval Number: E10440275S419/19©BEIESP
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Abstract: The Fifth generation cellular systems demand ultra high data speeds, ultra low power usage and lower latency. To meet these stringent requirements, Generalized Frequency Division multiplexing (GFDM) is one such waveform that is considered by researchers. At present, the 4G systems with Orthogonal Frequency division Multiplexing (OFDM) waveform have the drawbacks such as Inter Carrier Interference (ICI) and Inter Symbol Interference (ISI). To overcome the ICI/ISI and improve the spectrum efficiency, a non-orthogonal scheme of GFDM is introduced. In this paper, the performance of the Offset Quadrature Amplitude Modulation (OQAM) based GFDM, the analysis of the performance in terms of errors when passed through numerous fading channel condition for the Rayleigh channel model are discussed. The error performance is evaluated for EPA, EVA, ETU fading profiles as defined according to the 3GPP. Simulation results show that OQAM-GFDM error performance is superior to OFDM under various fading conditions and this could be more suitable wave form for 5G communications.
Keywords: Cyclic Prefix; GFDM; ISI; ICI; OFDM; Orthogonality; Rayleigh Fading Model.
Scope of the Article: Real-Time Information Systems