Özet:

 The upcoming mobile communication systems are working on the more flexibility towards higher use of available spectrum. These systems also introduces the new form of waveforms, so that the existing unused spectrums can be exploited to fulfill the demands of upcoming mobile communication scenarios i.e., 5G. The collaboration of these waveforms will help us to optimize the existing unused resources of the spectrum and offer the interference free communication than orthogonal frequency division multiplexing (OFDM) based systems which are operating at lower spectrum range of 6 GHz. However, the 5G is needed to cope with the better communication service by fulfilling the demands of futuristic communication. Hence, this paper presents uplink and downlink (U&D) waveforms for performance enhancement in upcoming mobile communication system (5G). In uplink transmission, the performance of cyclic prefix-OFDM (CP-OFDM) waveforms are analyzed under multi-user MIMO scenario and compared with DFT-OFDM waveform.  The paper analyzes the performance of downlink waveforms by considering CP-OFDM, windowed OFDM (W-OFDM) and filtered OFDM (F-OFDM) etc. The analysis with CP-OFDM and F-OFDM and W-OFDM with downlink transmission suggests that CP-OFDM offers better performance in reducing BER as it removes the interference and F-OFDM yields improved spectrum density than CP-OFDM and W-OFDM.  

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