Performance Analysis of Massive MIMO Millimeter Wave NOMA HetNet

Abstract

It is anticipated that the number of devices will increase tremendously in the coming era of internet of things (IoT) technologies and massive machine-type communications (mMTC). Huge spectrum resources are required to serve such demands. The LTE networks have limited spectrum resources, and these resources have not been completely and efficiently utilized. Therefore, in dense network environments, LTE networks will not be able to evade data congestion and low access efficiency. To solve this problem, the paper uses millimeter Wave (mmWave) technology, as it has a huge unutilized spectrum available for communication. However, the mmWave channel cannot travel long distances, we deploy mmWave technology in smallcell along with massive multiple-input-multiple-output (mMIMO) non-orthogonal multiple access (NOMA) technologies. Smallcells have great potential to enhance cellular networks, and mMIMO and NOMA are promising technologies for next-generation wireless communications. Massive antenna array in massive MIMO offers high multiplexing gains. Whereas more than one user can access the same frequency-time resource simultaneously using NOMA, therefore, it helps in saving the spectrum resources. Moreover, a Heterogeneous Network (HetNet) model has the potential to provide high spatial reuse and high-frequency reuse. Therefore, the combination of mMIMO, mmWave, NOMA technologies employed in a HetNet can offer a significant increase in the rates. This paper carries out a performance analysis of a proposed system model employing mMIMO mmWave NOMA HetNet system model and compares it with a conventional HetNet system model. The simulation results show that the proposed HetNet system model outperforms the conventional HetNet system model in terms of spectral efficiency.