  In the Fifth generation (5G) wireless communication systems, a majority of
the traffic demands is contributed by various multimedia applications. To
support the future 5G multimedia communication systems, the massive
multiple-input multiple-output (MIMO) technique is recognized as a key enabler
due to its high spectral efficiency. The massive antennas and radio frequency
(RF) chains not only improve the implementation cost of 5G wireless
communication systems but also result in an intense mutual coupling effect
among antennas because of the limited space for deploying antennas. To reduce
the cost, an optimal equivalent precoding matrix with the minimum number of RF
chains is proposed for 5G multimedia massive MIMO communication systems
considering the mutual coupling effect. Moreover, an upper bound of the
effective capacity is derived for 5G multimedia massive MIMO communication
systems. Two antenna receive diversity gain models are built and analyzed. The
impacts of the antenna spacing, the number of antennas, the quality of service
(QoS) statistical exponent, and the number of independent incident directions
on the effective capacity of 5G multimedia massive MIMO communication systems
are analyzed. Comparing with the conventional zero-forcing precoding matrix,
simulation results demonstrate that the proposed optimal equivalent precoding
matrix can achieve a higher achievable rate for 5G multimedia massive MIMO
communication systems.
