An overview of emerging technologies for 5G: Full-duplex relaying cognitive radio networks, device-to-device communications and cell-free massive MIMO
An overview of emerging technologies for 5G: Full-duplex relaying cognitive radio networks, device-to-device communications and cell-free massive MIMO
This work provides a comprehensive study on the concepts, advantages and challenges of the above-mentioned technologies. In addition, we also introduce four new research directions which are challenges of 5G and beyond.