# Ergodic Rate Analysis of Cooperative Ambient Backscatter Communication

## TL;DR

This paper analyzes the ergodic rates in a cooperative ambient backscatter communication system with multiple antennas, deriving bounds and power laws, and examining the impact of additional backscatter links through simulations.

## Contribution

It introduces a comprehensive analysis of ergodic rates and power scaling laws in cooperative ambient backscatter systems with multiple antennas.

## Key findings

- Derived upper bounds for ergodic rates of both links
- Characterized power scaling laws for primary and backscatter transmissions
- Quantified the impact of additional backscatter links

## Abstract

Ambient backscatter communication has shown great potential in the development of future wireless networks. It enables a backscatter transmitter (BTx) to send information directly to an adjacent receiver by modulating over ambient radio frequency (RF) carriers. In this paper, we consider a cooperative ambient backscatter communication system where a multi-antenna cooperative receiver separately decodes signals from an RF source and a BTx. Upper bounds of the ergodic rates of both links are derived. The power scaling laws are accordingly characterized for both the primary cellular transmission and the cooperative backscatter. The impact of additional backscatter link is also quantitatively analyzed. Simulation results are provided to verify the derived results.