5G will have to
support a multitude of new applications with a wide variety of requirements, including
higher peak and user data rates, reduced latency, enhanced indoor coverage, increased
number of devices, and so on. The expected traffic growth in 10 or more years
from now can be satisfied by the combined use of more spectrum, higher spectral
efficiency, and densification of cells. The focus of the present article is on
advanced techniques for higher spectral efficiency and improved coverage for cell
edge users. A smart combination of small cells, joint transmission coordinated multipoint
(JT CoMP), and massive MIMO to enhance the spectral efficiency with affordable complexity
is proposed.
A review of recent
achievements in the transition from theoretical to practical concepts and note
future research directions is proposed. Its show in measurements with
macro-plus-smallcell scenarios that spectral efficiency can be improved by
flexible clustering and efficient user selection, and that adaptive feedback
compression is beneficial to reduce the overhead significantly. READ FURTHER;
