Diversity Loss due to Interference Correlation

TL;DR

This paper investigates how interference correlation in wireless networks reduces the effectiveness of diversity in multi-antenna systems, providing quantitative analysis and joint SIR distribution for two antennas.

Contribution

It introduces the impact of interference correlation on diversity performance and derives the joint SIR distribution for two-antenna receivers in Poisson networks.

Findings

Interference correlation significantly reduces success probability.

Diversity loss is quantified using the diversity polynomial.

Complete joint SIR distribution is derived for two antennas.

Abstract

Interference in wireless systems is both temporally and spatially correlated. Yet very little research has analyzed the effect of such correlation. Here we focus on its impact on the diversity in Poisson networks with multi-antenna receivers. Most work on multi-antenna communication does not consider interference, and if it is included, it is assumed independent across the receive antennas. Here we show that interference correlation significantly reduces the probability of successful reception over SIMO links. The diversity loss is quantified via the diversity polynomial. For the two-antenna case, we provide the complete joint SIR distribution.