On the Performance of Spectrum Sharing Backscatter Communication Systems

TL;DR

This paper analyzes the performance of spectrum sharing backscatter communication systems, proposing an underlay strategy with power adaptation, deriving analytical expressions for key performance metrics, and validating results through simulations.

Contribution

It introduces a novel analytical framework for the secondary network's performance under power control in spectrum sharing backscatter systems.

Findings

Derived a new CDF expression for the secondary network's SNR

Provided accurate approximate formulas for capacity and error rates

Validated theoretical results with extensive simulations

Abstract

Spectrum sharing backscatter communication systems are among the most prominent technologies for ultralow power and spectrum efficient communications. In this paper, we propose an underlay spectrum sharing backscatter communication system, in which the secondary network is a backscatter communication system. We analyze the performance of the secondary network under a transmit power adaption strategy at the secondary transmitter, which guarantees that the interference caused by the secondary network to the primary receiver is below a predetermined threshold. We first derive a novel analytical expression for the cumulative distribution function (CDF) of the instantaneous signal-to-noise ratio of the secondary network. Capitalizing on the obtained CDF, we derive novel accurate approximate expressions for the ergodic capacity, effective capacity, and average bit error rate. We further validate our theoretical analysis using extensive Monte Carlo simulations.