Ultra-dense networks—characterised by a high concentration of access points, small cells and user devices—pose a formidable challenge to conventional single-dimension multiple access schemes.

In this paper, we consider a coexisting network of cellular transmission and device-to-device (D2D) communication, in which BS wants to communicate with far user, meanwhile, a D2D source desires to ...

Enterprises have a new multiple access technique to consider when seeking ways to boost the capacity of their 5G networks: beam division multiple access. Instead of relying on frequencies to allocate ...