Distributed mechanism design for multi‐cell communications aided by multiple reconfigurable intelligent surfaces

Di, Boya

doi:10.1049/cmu2.12194

Cited by 3 publications

(2 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In general, an RIS is composed of numerous low-priced passive reflecting elements [4]. The performance of the wireless system can be improved significantly by properly adjusting phase shifts and/or amplitude of the elements [5,6].…”

Section: Introductionmentioning

confidence: 99%

Energy efficiency maximisation for STAR‐RIS assisted full‐duplex communications

Guan

Wang

et al. 2023

IET Communications

View full text Add to dashboard Cite

Reconfigurable intelligent surface (RIS) has emerged as a promising technique for enhancing the performance of wireless networks. However, the traditional reflecting‐only RIS requires that the transmitter and receiver ought to be on the same side of the RIS, limiting the flexibility of RIS deployment. To overcome this drawback, a new simultaneous transmission and reflection reconfigurable intelligent surface (STAR‐RIS) has been proposed. Different from STAR‐RIS assisted half‐duplex systems in the existing literature, this work investigates a novel STAR‐RIS aided full‐duplex (FD) communication system. An FD base station (BS) communicates with an uplink (UL) user and a downlink user simultaneously over the same time‐frequency dimension assisted by a STAR‐RIS. The authors aim to maximise the energy efficiency by jointly optimising the transmit power of the BS and the UL user and the passive beamforming at the STAR‐RIS. The authors decouple the non‐convex problem into two subproblems and optimise them iteratively. The Dinkelbach's method is used to solve the power optimisation subproblem, whereas the penalty‐based method and successive convex approximation are applied to design the passive beamforming. The convergence and complexity of the proposed algorithm are also analysed. The simulation results demonstrate the superior performance of the proposed scheme compared with other baseline schemes.

show abstract

Section: Introductionmentioning

confidence: 99%

Energy efficiency maximisation for STAR‐RIS assisted full‐duplex communications

Guan

Wang

et al. 2023

IET Communications

View full text Add to dashboard Cite

show abstract

“…Increasingly severe spectrum congestion and band jamming problems lead to serious system performance degradation [1,2]. For instance, reception of satellite signal may be jammed by terrestrial mobile cellular networks, or cell-edge users will be jammed by adjacent cells [3]. In addition, maliciously transmitted jamming signals to deliberately disrupt legitimate communications can lead to direct interruption of communications [4], which has been considered a serious threat in both civilian and military fields.…”

Section: Introductionmentioning

confidence: 99%

Reconfigurable intelligent surface enhanced MISO‐OFDM anti‐jamming communications: Joint active and passive precoding design

et al. 2023

View full text Add to dashboard Cite

The reconfigurable intelligent surface (RIS) fundamentally changes the existing antijamming paradigm by reconstructing the wireless propagation environment. However, the existing RIS-based anti-jamming work mainly considers narrow-band frequency-flat fading channels. As an extension of existing work, the use of RIS to enhance the antijamming capability of broadband orthogonal frequency division multiplexing (OFDM) system in frequency-selective fading channels is first studied. In the multipath frequencyselective fading channels, the anti-jamming design needs to satisfy the channel gains of all signal paths with different delays. To this end, the authors propose a joint design scheme of active precoding at the transmitter and passive precoding at the RIS to attenuate the jamming signal and enhance the legitimate signal, and formulate the joint design objective to maximize the average rate of all subcarriers. An alternating optimization algorithm is developed to address this non-convex problem due to the complex coupling of active and passive precoding. In detail, the active and passive precoding are solved by the Cauchy-Schwarz inequality and power water-filling method and the alternating direction method of multipliers method assisted by multidimensional complex quadratic transform, respectively. Simulation results demonstrate that the proposed method can significantly improve the anti-jamming communication performance of the OFDM system compared with the scheme without RIS. In addition, the impact of the number of RIS elements and deployment location on system performance is revealed.

show abstract

Energy efficiency assessment of wireless system exploiting multiple reconfigurable intelligent surfaces with hardware impairments

Vinh

2024

ETRI Journal

View full text Add to dashboard Cite

This article explores a practical scenario with hardware impairments (HIs) in a multireconfigurable intelligent surface (RIS) assisted wireless system. This approach is based on a mathematical analysis of the performance of the HI‐RIS system. To this end, a closed‐form expression of the energy efficiency (EE) and its asymptotic behavior, particularly in regions with high transmit power, are derived. Next, an analysis was conducted to compare the EE of the HI‐RIS system with those of relevant systems: the ideal hardware (ID)‐RIS system, HI‐point‐to‐point (P2P) system (without RISs), and ID‐P2P system (without RISs). The numerical findings unequivocally demonstrate that the incorporation of RISs substantially enhances the EE of the HI‐RIS system, particularly at high transmit rates. However, at low transmit rates, the EE of the HI‐RIS system less than that of the HI‐P2P system. This trend is also reflected in the EEs of the ID‐RIS and ID‐P2P systems. Moreover, the significant impact of HI on the EEs of the HI‐RIS and HI‐P2P systems is analyzed. The effects of crucial system parameters, such as the number of reflecting elements, frequencies of WiFi networks, and fading order, are comprehensively determined to provide insights into the behaviors of the HI‐RIS system. The outage probability and throughput behaviors of the HI‐RIS system are also evaluated to comprehensively analyze of the benefits of RISs and the effects of HI. Finally, the accuracy of the derived expressions was verified using Monte Carlo simulations.

show abstract

Distributed mechanism design for multi‐cell communications aided by multiple reconfigurable intelligent surfaces

Cited by 3 publications

References 27 publications

Energy efficiency maximisation for STAR‐RIS assisted full‐duplex communications

Energy efficiency maximisation for STAR‐RIS assisted full‐duplex communications

Reconfigurable intelligent surface enhanced MISO‐OFDM anti‐jamming communications: Joint active and passive precoding design

Energy efficiency assessment of wireless system exploiting multiple reconfigurable intelligent surfaces with hardware impairments

Contact Info

Product

Resources

About