# Active-IRS Aided Wireless Network: System Modeling and Performance Analysis

arXiv: https://arxiv.org/abs/2211.04173 · HTML: https://mlsanity.com/paper/2211.04173/

## Key facts

- Cited by 1 papers in the map (data through 14 Oct 2026).
- First posted on arXiv 8 Nov 2022.

## Built on by (most cited first, 1 of 1)

- [Multi-stream Transmission for Directional Modulation Network via Distributed Multi-UAV-aided Multi-active-IRS](https://mlsanity.com/paper/2404.15297/) (2024)

## Abstract (arXiv)

Active intelligent reflecting surface (IRS) enables flexible signal reflection control with power amplification, thus effectively compensating the product-distance path-loss in conventional passive-IRS aided systems. In this letter, we characterize the communication performance of an active-IRS aided single-cell wireless network. To this end, we first propose a customized IRS deployment strategy, where the active IRSs are uniformly deployed within a ring concentric with the cell to serve the users far from the base station. Next, given the Nakagami-m fading channel, we characterize the cascaded active-IRS channel by using the mixture Gamma distribution approximation and derive a closed-form expression for the mean signal-to-noise ratio (SNR) at the user averaged over channel fading. Moreover, we numerically show that to maximize the system performance, it is necessary to choose a proper active-IRS density given a fixed number of total reflecting elements, which significantly differs from the passive-IRS case for which the centralized IRS deployment scheme is better. Furthermore, the active-IRS aided wireless network achieves higher spatial throughput than the passive-IRS counterpart when the total number of reflecting elements is small.