Enabling and challenges for 5G Technologies

The fifth generation of cellular wireless networks is envisaged to overcome existing challenges cellular networks such as higher rates, great performance. Moreover, indeed, 5G will need to be a paradigm shift that includes high carrier frequencies with massive bandwidths, extreme base station and device densities and unprecedented numbers of antennas. This paper discusses these topics. Furthermore, it introduces a new architecture distributed networks based on Cloud Radio Access Network (C-RAN) as discussed in a former work. This has providing high performance environment best matched with mobile broadband and with a less cost. The GFDM technique, as a main difference between novel generations, will be presented. In fact, because of spectrum capacity efficiency, GFDM offers a higher bit rate. By the occasion, massive MIMO technique will be slightly described. Based on D2D, GFDM, the concept of caching in 5G will be also studied.