Performance analysis of multi user MIMO NOMA network with hierarchical clustering

ABSTRACT

In this paper, a multi-user multiple input multiple output network is considered with a user clustering technique so that groups of users can be served on a common resource. A hierarchical clustering algorithm defined on the distance metric has been used to form the user clusters. Users within a cluster exploit the non-orthogonal multiple access method to serve the users on the same time and frequency resource blocks, thus resulting in a spectrally efficient transmission. While the different clusters of users are served on several focussed beams, the popular zero-forcing beamforming method is adopted to cancel the inter-cluster interference. Performance evaluation in terms of the sum rate of users and fairness has been done to establish the efficiency of the proposed network model.

KEYWORDS:

• MIMO
• NOMA
• ZF beamforming
• hierarchical clustering
• sum rate

Disclosure statement

No potential conflict of interest was reported by the author(s).