# Reliability Analysis of Large Intelligent Surfaces (LISs): Rate Distribution and Outage Probability

## TL;DR

This paper analyzes the uplink rate distribution and outage probability of large intelligent surfaces (LISs), providing asymptotic expressions that help evaluate system reliability in wireless communications.

## Contribution

It derives the asymptotic distribution of uplink sum-rate and outage probability for LIS systems, addressing a gap in performance characterization.

## Key findings

- Asymptotic rate distribution closely matches exact mutual information.
- Outage probability expressions enable reliability assessment of LIS systems.
- Simulation confirms accuracy of theoretical analysis.

## Abstract

Large intelligent surfaces (LISs) have been recently proposed as an effective wireless communication solution that can leverage antenna arrays deployed on the entirety of man-made structures such as walls. An LIS can provide space-intensive and reliable communication, enabling the desired wireless channel to exhibit a perfect line-of-sight. However, the outage probability of LIS, which is an important performance metric to evaluate the system reliability, remains uncharacterized. In this paper, the distribution of uplink sum-rate is asymptotically analyzed for an LIS system. Given the derived asymptotic distribution, the outage probability is derived for the considered LIS system. Simulation results show that the results of the proposed asymptotic analyses are in close agreement to the exact mutual information in the presence of a large number of antennas and devices.