Today we are living in a world in which wireless communication has become an essential part of everyone’s life. It permits users to communicate without wire anytime and anywhere. Now a days, many devices like smartphones, GPS systems, Wi-Fi, satellite television and wireless computers etc. are all wireless communication based. With the advent of new technologies, wireless communication has experienced many generations and evolutions, from first generation (1G) to fifth generation (5G). The current research in mobile wireless technology concentrates on advanced implementation of 5th generation (5G) and 6G technology. These future wireless communication networks need to provide broadband services such as wireless internet access to subscribers. Such broadband services require reliable and high data rate transmission over time and frequency-dispersive channels. There are a number of features which are essential for future wireless communication systems compared to the previous generations such as small size base stations, massive MIMO, large channel bandwidths, very high data rate, low latency, enhanced coverage area and low energy consumption. Energy efficiency enhancement, security, privacy, resource and spectrum allocation, design infrastructure, coding and modulation techniques and wireless access techniques etc. are some major challenges for the implementation of future wireless communication systems.

The purpose of this Special Issue is to provide the opportunity for the academic and industrial communities to publish their works on emerging trends, opportunities and challenges in 5G and 6G wireless communications and applications.