  The advent of the wireless communications systems augurs new cutting-edge
technologies, including self-driving vehicles, unmanned aerial systems,
autonomous robots, Internet-of-Things, and virtual reality. These technologies
require high data rates, ultra-low latency, and high reliability, all of which
are promised by the fifth generation of wireless communication systems (5G).
Many research groups state that 5G cannot meet its demands without artificial
intelligence (AI) integration as 5G wireless networks are expected to generate
unprecedented traffic giving wireless research designers access to big data
that can help in predicting the demands and adjust cell designs to meet the
users requirements. Subsequently, many researchers applied AI in many aspects
of 5G wireless communication design including radio resource allocation,
network management, and cyber-security. In this paper, we provide an in-depth
review of AI for 5G wireless communication systems. In this respect, the aim of
this paper is to survey AI in 5G wireless communication systems by discussing
many case studies and the associated challenges, and shedding new light on
future research directions for leveraging AI in 5G wireless communications.
