Energy-efficient optimization of mm-wave communication using a novel approach of beam space MIMO-NOMA

Abstract EN

The new concept of Beam space Multiple Input Multiple Output system (BS- MIMO) was developed to address the issue of reduced Energy Efficiency (EE) of the traditional MIMO in millimeter-Wave (mm-Wave) wireless communication systems by decreasing the large number of radio frequency chains (RF-chains) while maintaining the same number of antennas in those systems.

On the other hand, fewer RF-Chains leads to a smaller number of users that the system can serve as a result of the number of use rs that can be served must be equal to/or less than the RF-chains' number.

To overcome the above issue, the BS-MIMO is proposed to be integrated with Non-Orthogonal Multiple-Access (NOMA) scheme to produce the novel approach of BS-MIMO-NOMA.

As a result, the novel scheme is capable of serving a group of users with correlated channels via a single RF-chain.

In this paper, we will address the issue of EE of the above- mentioned communication systems.

Specifically, we propose and develop an iterative algorithm with a low complexity that achieves near-perfect performance.

The proposed scheme, named MSE-DPA (for Mean-Square-Error-Based Dynamic Power Allocation Algorithm), is checked to ensure this validity of Figure-of-Merit.

The simulation results indicate that the EE is approximately 85% greater than that of traditional (fully-digital) MIMO systems for a certain fair system and environment scenario.