The paper deals with the current scenario and future prospects of the 5G system along with the challenges it faces. The fourth-generation wireless communication systems are already implemented or going to be implemented in many countries. However, there are still some challenges facing 4G, such as spectrum problem, power consumption and poor coverages. Mobile phones are moving faster to provide the user the same or even better experience than the personal computer. It is expected that from mobile communication point of view, we should have a higher data transmission rate compared to wire line network. Also, the expectation is for seamless connectivity and access. The wireless designers have started research on fifth-generation wireless systems that are expected to be deployed after 2020. In this paper, various promising technologies for future wireless communication system such as huge multiple input and multiple output system, power efficient communications and cognitive radio network are discussed. Existing and future challenges are also discussed.

5G is the future technology for mobile and wireless communications. The fourthgeneration wireless communication systems are already implemented or going to be implemented in many countries, 5G is the successor of 4G and 3G network technologies. However, there are still some challenges facing 4G, such as spectrum problem, power consumption and poor coverage. Video communication is facing many challenges now. 5G wireless networks will provide many features to handle this (Cheng-Xiang et al., 2014). It will provide the end users more opportunities and flexibilities in accessing video and multimedia contents (Kwadwo and Mikio, 2014). It is quite interesting to note that the new mobile phones of today, especially the smartphones, are not just simple phones but much more than that. They are little mobile PCs and function more or less like that. They provide touch screen, user-friendly graphical user interfaces, Internet services and web browsing, email facility, local wireless fidelity connectivity, built-in camera, high quality music player capability and small media management, besides phone call functionalities. From 2G in 1991 to 3G system first launched in 2001, the wireless mobile network has transformed from a pure voice call to a very rich multimedia system.

Telecommunications Journal, Wireless communication, MIMO systems, Femto cell, Data rate, Spectrum, Fading.