Ergodic Rate Analysis of Cooperative Ambient Backscatter Communication

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. Index TermsAmbient backscatter, cooperative receiver, successive interference cancellation, ergodic rate.

Large-Scale Wireless-Powered Networks With Backscatter Communications—A Comprehensive Survey

“…In [64], the sum rate is analyzed for SIC based decoding, and a problem is formulated to maximize the sum rate by optimizing the beamforming vector at the multi-antenna ambient transmitter. In addition, in [65], upper bounds of the ergodic rates for both links, i.e., backscatter communication and the legacy communication, are derived considering a multi-antenna cooperative receiver which separately decodes the signals from a multi-antenna ambient transmitter and a single-antenna tag. Recently, [66] has investigated resource allocation for the CABCSs with a finite block-length backscatter link.…”

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