5G Multimedia Massive MIMO Communications Systems

TL;DR

This paper proposes an optimal precoding matrix for 5G multimedia massive MIMO systems that reduces RF chain costs and enhances capacity by considering mutual coupling effects and other system parameters.

Contribution

It introduces a novel optimal equivalent precoding matrix with minimal RF chains tailored for 5G multimedia massive MIMO, accounting for mutual coupling effects.

Findings

The proposed precoding matrix outperforms conventional zero-forcing in achievable rate.

An upper bound of effective capacity is derived for system analysis.

System parameters like antenna spacing and QoS impact effective capacity.

Abstract

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.