Weighted Sum Rate Maximization in IRS-BackCom Enabled Downlink Multi-Cell MISO Network

Sai Xu; Yanan Du; Jiajia Liu; Jingtao Li

doi:10.1109/LCOMM.2021.3140207

Weighted Sum Rate Maximization in IRS-BackCom Enabled Downlink Multi-Cell MISO Network

Sai Xu, Yanan Du, Jiajia Liu, Jingtao Li

School of Cybersecurity

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

This letter investigates intelligent reflecting surface backscatter communication (IRS-BackCom) assisted downlink multi-cell multiple-input single-output network for the first time. In such multi-cell network, each IRS instead of active transmit antennas serves as a cell base station (BS) to communicate with its single-antenna users through modulation and backscatter of ambient wireless signal from a power beacon (PB). To maximize weighted sum rate (WSR) of network subject to total power budget, coordinated multipoint transmission (CoMP) is implemented at the IRSs. By alternately optimizing the beamforming vectors at the PB and all the IRSs, the sub-optimal WSR is obtained. Simulations show the achievable WSR and verify the feasibility of the proposed IRS-BackCom enabled CoMP scheme.

Original language	English
Pages (from-to)	642-646
Number of pages	5
Journal	IEEE Communications Letters
Volume	26
Issue number	3
DOIs	https://doi.org/10.1109/LCOMM.2021.3140207
State	Published - 1 Mar 2022

Keywords

Backscatter communication
Coordinated multipoint transmission
Intelligent reflecting surface
Weighted sum rate maximization

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10.1109/LCOMM.2021.3140207

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title = "Weighted Sum Rate Maximization in IRS-BackCom Enabled Downlink Multi-Cell MISO Network",

abstract = "This letter investigates intelligent reflecting surface backscatter communication (IRS-BackCom) assisted downlink multi-cell multiple-input single-output network for the first time. In such multi-cell network, each IRS instead of active transmit antennas serves as a cell base station (BS) to communicate with its single-antenna users through modulation and backscatter of ambient wireless signal from a power beacon (PB). To maximize weighted sum rate (WSR) of network subject to total power budget, coordinated multipoint transmission (CoMP) is implemented at the IRSs. By alternately optimizing the beamforming vectors at the PB and all the IRSs, the sub-optimal WSR is obtained. Simulations show the achievable WSR and verify the feasibility of the proposed IRS-BackCom enabled CoMP scheme.",

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AB - This letter investigates intelligent reflecting surface backscatter communication (IRS-BackCom) assisted downlink multi-cell multiple-input single-output network for the first time. In such multi-cell network, each IRS instead of active transmit antennas serves as a cell base station (BS) to communicate with its single-antenna users through modulation and backscatter of ambient wireless signal from a power beacon (PB). To maximize weighted sum rate (WSR) of network subject to total power budget, coordinated multipoint transmission (CoMP) is implemented at the IRSs. By alternately optimizing the beamforming vectors at the PB and all the IRSs, the sub-optimal WSR is obtained. Simulations show the achievable WSR and verify the feasibility of the proposed IRS-BackCom enabled CoMP scheme.

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Weighted Sum Rate Maximization in IRS-BackCom Enabled Downlink Multi-Cell MISO Network

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