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The recent research area of the communication engineers are the 5G communication systems. It is expected to provide increased data rate, better spectral characteristics, higher number of simultaneously connected devices, good coverage or lower outage probability, lower infrastructure deployment costs, higher versatility and scalability, higher reliability of communication, higher number of supported devices, best signalling and bandwidth efficiency. So this technology will make a revolution in communication by supporting high speed wireless connections, and a fully realized Internet of things (IoT). This paper comprises the services, requirements and challenges of 5G communication systems.