Reconfigurable Intelligent Surface Based Uplink MU-MIMO Symbiotic Radio System

Hu, Jin‐Lin; Liang, Ying-Chang; Pei, Yiyang; Sun, Sumei; Liu, Ruolun

doi:10.1109/twc.2022.3194910

“…The BS acquires the uplink instantaneous CSI through estimating the pilot signals during the uplink training period. To facilitate the theoretical analysis, the BS is assumed to perfectly know the CSI of all involved channels, as prior works [57]- [64]. Moreover, we do not consider the impact of channel aging or outdated channel information in fast-fading environments [75]- [83], and assume narrowband communications, where the channels follow frequency-flat block fading.…”

Section: System Modelmentioning

confidence: 99%

“…Joint beamforming and modulation design for embedding extra data into carrier signals from the BS to the RIS in a downlink MU-MIMO network is proposed in [63]. The work [64] presents a novel symbiotic radio system on the basis of RIS-aided MU-MIMO to enhance the primary transmission and simultaneously transmit its own information by back-scattering modulation.…”

Section: Introductionmentioning

confidence: 99%

Capacity Analysis and Rate Maximization Design in RIS-Aided Uplink Multi-User MIMO

Jiang¹,

Schotten²

2023

Preprint

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<p>Reconfigurable intelligent surface (RIS) has recently drawn intensive attention due to its potential of simultaneously realizing high spectral and energy efficiency in a sustainable way. This paper focuses on the design of efficient transmission methods to maximize the uplink sum throughput in a RIS-aided multi-user multi-input multi-output (MU-MIMO) system. To provide an insightful basis, the channel capacity of RIS-aided MU-MIMO is theoretically analyzed. Then, the conventional transmission schemes based on orthogonal multiple access are presented as the baseline. From the information-theoretic perspective, we propose two novel schemes, i.e., \textit{joint transmission} based on the semidefinite relaxation of quadratic optimization problems and \textit{opportunistic transmission} relying on the best user selection. The superiority of the proposed schemes over the conventional ones in terms of achievable rates is justified through simulation results.</p>

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“…The BS acquires the uplink instantaneous CSI through estimating the pilot signals during the uplink training period. To facilitate the theoretical analysis, the BS is assumed to perfectly know the CSI of all involved channels, as prior works [57]- [64]. Moreover, we do not consider the impact of channel aging or outdated channel information in fast-fading environments [75]- [83], and assume narrowband communications, where the channels follow frequency-flat block fading.…”

Section: System Modelmentioning

confidence: 99%

“…Joint beamforming and modulation design for embedding extra data into carrier signals from the BS to the RIS in a downlink MU-MIMO network is proposed in [63]. The work [64] presents a novel symbiotic radio system on the basis of RIS-aided MU-MIMO to enhance the primary transmission and simultaneously transmit its own information by back-scattering modulation.…”

Section: Introductionmentioning

confidence: 99%

Capacity Analysis and Rate Maximization Design in RIS-Aided Uplink Multi-User MIMO

Jiang¹,

Schotten²

2023

Preprint

0

View full text Add to dashboard Cite

<p>Reconfigurable intelligent surface (RIS) has recently drawn intensive attention due to its potential of simultaneously realizing high spectral and energy efficiency in a sustainable way. This paper focuses on the design of efficient transmission methods to maximize the uplink sum throughput in a RIS-aided multi-user multi-input multi-output (MU-MIMO) system. To provide an insightful basis, the channel capacity of RIS-aided MU-MIMO is theoretically analyzed. Then, the conventional transmission schemes based on orthogonal multiple access are presented as the baseline. From the information-theoretic perspective, we propose two novel schemes, i.e., \textit{joint transmission} based on the semidefinite relaxation of quadratic optimization problems and \textit{opportunistic transmission} relying on the best user selection. The superiority of the proposed schemes over the conventional ones in terms of achievable rates is justified through simulation results.</p>

show abstract

Secure transmission design for RIS-aided symbiotic radio networks: A DRL approach

Li,

Liu,

Xie

2024

Digital Communications and Networks

0

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Reconfigurable Intelligent Surface Based Uplink MU-MIMO Symbiotic Radio System

Cited by 19 publications

References 44 publications

Capacity Analysis and Rate Maximization Design in RIS-Aided Uplink Multi-User MIMO

Capacity Analysis and Rate Maximization Design in RIS-Aided Uplink Multi-User MIMO

Capacity Analysis and Rate Maximization Design in RIS-Aided Uplink Multi-User MIMO

Secure transmission design for RIS-aided symbiotic radio networks: A DRL approach

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