… In addition, wireless technologies are showing an increasingly … of wireless systems, problems,
and issues regarding their … Wireless communication has been long used in industry. The …

… On the other hand, mobile terminals in wireless systems neces… the design of future wireless
communications. During the past … than open-loop ones to save energy is still an open issue. …

… (E2E) communication based semantic communications will be given and open issues that
need to … In this section, we would like to list several major open issues for future investigations. …

… , many open issues remain in the design and performance analysis of codes for wireless …
robust and spectrally efficient communication by leveraging the time-varying nature of the …

… Although it is important to mention security, it is being discussed in the present paper mostly
as an open issue. Furthermore, many other works address specifically the problem [32], [43]. …

… in wireless communication. This paper comprehensively surveys the recent advances of the
applications of ML in wireless communication… ML to wireless communication are identified to …

… Finally, section 3, 4, 5 and 6 gives a high-levelknowledge of 5G wireless communication
systems which include open issues and research challenges towards channel estimation and …

… communication reliability and guaranteed delay support which remain open issues in wireless
… Furthermore, we identify current open issues that will define the future research efforts in …

… of practical implementation issues, although the former acts as the dominant factor. Recently,
a range of theoretical and practical aspects of FD communications have been investigated […

… communications, which are expected to have a far-reaching impact on wireless communications,
have … wave behaviors, current research efforts, as well as corresponding open issues. …