Capacity analysis of a multi-cell multi-antenna cooperative cellular network with co-channel interference

TL;DR

This paper develops an alpha stable process-based model for co-channel interference in multi-cell MIMO networks, deriving capacity formulas and analyzing how cooperation and interference affect cell-edge user performance.

Contribution

It introduces a novel interference model for multi-cell MIMO networks and derives exact and closed-form capacity expressions, highlighting the effects of cooperation and interference.

Findings

Cooperative transmission enhances capacity, especially with high interference density.

Capacity gain decreases as the number of cooperative antennas or base stations increases.

The model accurately captures the impact of interference parameters on network performance.

Abstract

Characterization and modeling of co-channel interference is critical for the design and performance evaluation of realistic multi-cell cellular networks. In this paper, based on alpha stable processes, an analytical co-channel interference model is proposed for multi-cell multiple-input multi-output (MIMO) cellular networks. The impact of different channel parameters on the new interference model is analyzed numerically. Furthermore, the exact normalized downlink average capacity is derived for a multi-cell MIMO cellular network with co-channel interference. Moreover, the closed-form normalized downlink average capacity is derived for cell-edge users in the multi-cell multiple-input single-output (MISO) cooperative cellular network with co-channel interference. From the new co-channel interference model and capacity, the impact of cooperative antennas and base stations on cell-edge user performance in the multi-cell multi-antenna cellular network is investigated by numerical methods. Numerical results show that cooperative transmission can improve the capacity performance of multi-cell multi-antenna cooperative cellular networks, especially in a scenario with a high density of interfering base stations. The capacity performance gain is degraded with the increased number of cooperative antennas or base stations.