Guest Editorial Special Issue on Inter-Tower Communications and Networks

The ever increasing demand for new applications, and the augmented consumption of high-data-rate multimedia services are the driving forces for wireless communication systems’ evolution. In particular, the latest use cases, such as augmented/virtual reality and unmanned mobility, request a considerable enhancement in performance since system capacity above 1 Tb/s, 99.99999 percent reliability, and latency below 1 ms are required [9] , [10] , [11] . Undoubtedly, the research community has achieved many remarkable advances in different areas to approach the requirements, such as coding schemes [12] , [13] , [14] , multiplexing schemes [15] , [16] , Multiple-Input Multiple-Output (MIMO) schemes [17] , [18] , or modulation schemes [19] , [20] . Nevertheless, the performance of traditional signal processing techniques is already very close to the Shannon limit, so the margin for further improvement at the Physical Layer (PHY) is minimal.