Active RIS-Assisted Secure Transmission for Cognitive Satellite Terrestrial Networks

Niu, Hehao; Lin, Zhi; An, Kang; Liang, Xiaohu; Hu, Yihua; Li, Dong; Zheng, Gan

doi:10.1109/tvt.2022.3208268

Cited by 34 publications

(26 citation statements)

References 28 publications

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“…Mounting an LED light display on different parts of the vehicle (e.g., on the windscreen), as well as using different communication patterns, are also potential future research directions. Data collection and transmission might include recent advances in sensing techniques as well, such as reconfigurable intelligent surface [ 30 , 31 , 32 ].…”

Section: Discussionmentioning

confidence: 99%

Communication between Autonomous Vehicles and Pedestrians: An Experimental Study Using Virtual Reality

Zhanguzhinova¹,

Makó²,

Borsos³

et al. 2023

Sensors

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One of the major challenges of autonomous vehicles (AV) is their interaction with pedestrians. Unofficial interactions such as gestures, eye contact, waving, and flashing lights are very common behavioral patterns for drivers to express their intent to give priority. In our research we composed a virtual reality experiment for a pedestrian crossing in an urban environment in order to test pedestrians’ reactions on an LED light display mounted on a virtual AV. Our main research interest was to investigate whether communication patterns influence the decision making of pedestrians when crossing the road. In a VR environment, four scenarios were created with a vehicle approaching a pedestrian crossing with different speeds and displaying a special red/green sign to pedestrians. Here, 51 persons participating in the experiment had to decide when crossing is safe. Results show that the majority of people indicated they would cross in the time windows when it was actually safe to cross. Male subjects made their decision to cross slightly faster but no significant differences were found in the decision making by gender. It was found that age is not an influencing factor, either. Overall, a quick learning process was experienced proving that explicit communication patterns are self-explaining.

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Section: Discussionmentioning

confidence: 99%

Communication between Autonomous Vehicles and Pedestrians: An Experimental Study Using Virtual Reality

Zhanguzhinova¹,

Makó²,

Borsos³

et al. 2023

Sensors

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“…The constraints of minimum quality-ofservice (QoS) is applied, and a sum-rate maximization problem is formulated and solved. In [13], the cognitive satellite terrestrial network and a secure transmission maximization problem is considered. A interference threshold is considered which introduces larger non-convexity of the problem.…”

Section: A Related Workmentioning

confidence: 99%

“…In this paper, we develop the beamforming optimization of this problem, and apply the mainstream AO method to solve this problem. It is possible the our work can be extended to more general scenarios or the complexity of the optimization can be reduced by referring to previous works [12], [13], [14], [15], [16], [17], [18], [19].…”

Section: A Related Workmentioning

confidence: 99%

Energy Efficiency Fairness of Active Reconfigurable Intelligent Surfaces-Aided Cell-Free Network

Wang

Peng

2023

IEEE Access

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Reconfigurable intelligent surface (RIS) has been widely recognized as a promising technique for future wireless communications. Benefiting from its ability to improve channel capacity with low cost and power consumption, the concept of RIS-aided cell-free network is proposed to break the bottleneck of current network architecture. However, the multiplicative fading effect (MFE) introduced by RIS prevents RIS-aided cell-free network from higher network capacity. To further increase the capacity of the RIS-aided cell-free network, in this paper, we propose the concept of active RIS-aided cell-free network, where the RIS is replaced by active RIS in traditional RIS-aided cell-free network. Moreover, we analyze the proposed network by investigating its energy-efficiency fairness (EEF). To elaborate, we formulate the EEF maximization problem in the active RIS-aided cell-free network, and propose a joint beamforming and resource allocation (JBRA) algorithm by exploiting alternating optimization (AO) and fractional programming (FP). Simulations results verify the proposed active RIS-aided cell-free network as well as the JBRA algorithm as an energy-efficient design for cell-free network with large network capacity.INDEX TERMS Wireless communications, reconfigurable intelligent surface (RIS), active RIS, energy efficiency fairness (EEF), cell-free network.

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“…By converting direct current bias power into radio frequency power, the active element can directly amplify the incident signal [37]. Then, in [38], the authors considered the effect of active RIS in improving the achievable secrecy rate of cognitive satelliteterrestrial network. In [39], the authors studied the active RISenabled energy-constrained wireless network and showed the superiorities of the active RIS in supporting multiple energylimited devices.…”

Section: Introductionmentioning

confidence: 99%

Active RIS Assisted Rate-Splitting Multiple Access Network: Spectral and Energy Efficiency Tradeoff

Niu

Lin

et al. 2023

IEEE J. Select. Areas Commun.

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With the increasing demand of high data rate and massive access in both ultra-dense and industrial Internet-ofthings networks, spectral efficiency (SE) and energy efficiency (EE) are regarded as two important and inter-related performance metrics for future networks. In this paper, we investigate a novel integration of rate-splitting multiple access (RSMA) and reconfigurable intelligent surface (RIS) into cellular systems to achieve a desirable tradeoff between SE and EE. Different from the commonly used passive RIS, we adopt reflection elements with active load to improve a newly defined metric, called resource efficiency (RE), which is capable of striking a balance between SE and EE. This paper focuses on the RE optimization by jointly designing the base station (BS) transmit precoding and RIS beamforming (BF) while guaranteeing the transmit and forward power budgets of the BS and RIS, respectively. To efficiently tackle the challenges for solving the RE maximization problem due to its fractional objective function, coupled optimization variables, and discrete coefficient constraint, the formulated nonconvex problem is solved by proposing a two-stage optimization framework. For the outer stage problem, a quadratic transformation is used to recast the fractional objective into a linear form, and a closed-form solution is obtained by using auxiliary variables. For the inner stage problem, the system sum rate is approximated into a linear function. Then, an alternating optimization (AO) algorithm is proposed to optimize the BS precoding and RIS BF iteratively, by utilizing the penalty dual decomposition (PDD) method. Simulation results demonstrate the superiority of the proposed design compared to other benchmarks.

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Active RIS-Assisted Secure Transmission for Cognitive Satellite Terrestrial Networks

Abstract: How to cite:Please refer to published version for the most recent bibliographic citation information. If a published version is known of, the repository item page linked to above, will contain details on accessing it.

Cited by 34 publications

References 28 publications

Communication between Autonomous Vehicles and Pedestrians: An Experimental Study Using Virtual Reality

Communication between Autonomous Vehicles and Pedestrians: An Experimental Study Using Virtual Reality

Energy Efficiency Fairness of Active Reconfigurable Intelligent Surfaces-Aided Cell-Free Network

Active RIS Assisted Rate-Splitting Multiple Access Network: Spectral and Energy Efficiency Tradeoff

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