In view of the increasing data traffic and number of users, it has become imperative to use new technologies for wireless communication system. This is how different generations of wireless communication systems have been shaped. Recently, 5G technology has come into the wireless communication system to meet the present requirements. To meet the challenges, in place of orthogonal multiple access techniques, non-orthogonal waveforms for multiple access techniques gained popularity in the new generation of wireless communication system. In this paper, generalized frequency division multiplexing (GFDM) is simulated over fading channel using root cosines filter. BER performances with various modulation techniques are simulated and their comparative study is shown in the results section. The effect of roll off factor of root cosine filter on the BER performance is also analyzed and discussed in the paper. A significant change has been observed in the performance of BER with the change in roll off factor.

Wireless Communication system, NOMA, 5G wireless technology, GFDM etc