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In modern era the exponential growth in smartphones with better applications need higher efficiency as compare with 4G devices. The data rate and spectrum efficiency is increasing day by day. Although 4G system provided much better services and better latency rate, there is still a gap between people's requirements and what 4G system is providing. This article gives an overview of key enabling technologies which could be used in future 5G wireless systems. Some of these are Massive MIMO,doi:10.23956/ijarcsse.v7i7.98 fatcat:qrdedni5gra3nc3q6trmsmxh5q