Performance Analysis of Partial Interference Cancellation in Multi-Antenna UDNs

TL;DR

This paper analyzes the performance of partial zero-forcing receivers in ultra-dense multi-antenna cellular networks, providing formulas and insights for optimizing interference cancellation versus array gain.

Contribution

It offers integral and closed-form expressions for success probability in UDNs with PZF, guiding optimal interference cancellation strategies.

Findings

Using no more than half of degrees of freedom for interference cancellation is optimal.

Provides accurate performance evaluation tools for PZF in UDNs.

Numerical results validate the tradeoff between interference cancellation and array gain.

Abstract

The employment of partial zero-forcing (PZF) receivers at the base stations represents an efficient and low-complexity technique for uplink interference management in cellular networks. In this paper, we focus on the performance analysis of ultra-dense networks (UDNs) in which the multi-antenna receivers adopt PZF. We provide both integral expressions and tight closed-form approximations for the probability of successful transmission, which can be used to accurately evaluate the optimal tradeoff between interference cancellation and array gain. Numerical results show that no more than half of the available degrees of freedom should be used for interference cancellation.