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IEEE Power-and-Energy-Society Innovative Smart Grid Technologies Conference (ISGT)

作者： Ghaffarzadeh, Hooman Mehrizi-Sani, Ali Washington State Univ Sch Elect Engn & Comp Sci Pullman WA 99164 USA

ISBN: (纸本)9781509051670

In recent years, due to high demand for electrical energy both in commercial and residential sectors, power systems often operate close to their operational limits. However, transients caused by load variation, faults and large set point changes can cause an apparatus violates its operational limits and different subsequent attentional problems such as instability and tripping of protective devices. Several strategies are proposed to control an apparatus under different operating conditions. Set point automatic adjustment with correction-enabled (SPAACE) [1], is one of the proposed algorithm to improve the set point tracking of a controllable power system and mitigate transients within the system. SPAACE uses a feedback signal from the output of an apparatus and monitors the trend of the signal and based on that temporarily changes its reference set point. In this paper, a comprehensive study of this algorithm is performed then the performance of SPAACE with a new prediction method and for the multiple-input-multiple-output systems is evaluated.

关键词： Current control exponential prediction multiple-input-multiple-output system third-order system

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RSMA-Enabled Aerial RIS-Aided MU-MIMO system for Improved Spectral-Efficient URLLC

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IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 2025年第2期74卷 3110-3127页

作者： Katwe, Mayur V. Deshpande, Rasika Singh, Keshav Ku, Meng-Lin Clerckx, Bruno Natl Inst Technol Dept Elect & Engn Raipur 492010 India Natl Sun Yat sen Univ Int Masters Program Telecommun Engn IMPTE Dept Kaohsiung 804 Taiwan Natl Sun Yat Sen Univ Inst Commun Engn Kaohsiung 804 Taiwan Natl Cent Univ Dept Commun Engn Taoyuan City 32001 Taiwan Imperial Coll London Dept Elect & Elect Engn London SW7 2AZ England

This study explores a new resource allocation framework for a multi-user multiple-input and multiple-output (MU-MIMO) downlink system utilizing aerial reconfigurable intelligent surfaces (ARIS) in a rate-splitting multiple access (RSMA) scheme under ultra-reliable low-latency communication (URLLC). The objective is to maximize the overall spectral efficiency of users located in severely blocked dead zones, where there is no direct link between the base station (BS) and the users and, the ARIS acts as a relay to facilitate communication. To achieve this, we formulate a sum-rate maximization problem considering the joint design of active beamforming at the BS, passive beamforming at the ARIS, and determination of the ARIS height. The constraints include given packet size and packet error probability (PEP) requirements. Since the original problem is non-convex, we propose an alternating optimization framework to solve it. The framework involves solving sub-problems of beamforming design and ARIS location alternately. The beamforming design sub-problem is addressed using successive convex approximation, while the ARIS location sub-problem is solved using a particle-swarm optimization (PSO) algorithm. The proposed solution demonstrates fast convergence within a few iterations, as validated through numerical simulations. Additionally, a computational complexity analysis is performed. The results show that the proposed RSMA scheme for the ARIS-aided DL URLLC system surpasses conventional multiple access schemes in terms of rate performance. The findings highlight the potential of utilizing ARIS and RSMA to enhance the spectral efficiency and meet the requirements of URLLC applications.

关键词： Ultra reliable low latency communication Spectral efficiency Reliability Array signal processing Energy efficiency Resource management NOMA Reliability engineering Multiaccess communication Reconfigurable intelligent surfaces Rate-splitting multiple access (RSMA) reconfigurable intelligent surface (RIS) ultra-reliable low-latency communication (URLLC) downlink (DL) communication multi-user multiple-input-multiple-output system active and passive beamforming sum-rate maximization

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Bit-error-rate minimisation in multiuser transmission schemes for multiple-input-multiple-output communication with increasing number of base station antennas

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IET COMMUNICATIONS 2015年第16期9卷 1960-1967页

作者： Marinello, Jose Carlos Ciriaco, Fernando Abrao, Taufik Univ Estadual Londrina Elect Engn Dept DEEL UEL BR-86057970 Londrina Parana Brazil

Multiuser transmission (MuT) can be carried out at the base station of a multiple-input-multiple-output system for mitigating the downlink multiuser interference, achieving a near-single-user performance at the mobile terminals. These MuT systems can be designed for optimising different performance metrics, such as the bit-error-rate (BER), which is the focus of this study. In order to mitigate the MuT's complexity, a convex formulation for the minimum BER (MinBER) optimisation problem is proposed, by employing some slight modifications on its original formulation. The authors have shown that the novel convex formulation makes the application of some optimisation algorithms very efficient, leading to a reduced complexity and enabling the system operation in higher dimensions. Indeed, the authors also show that in these conditions the MinBER-MuT system presents the most noticeable gains in performance. The results demonstrate that, among the investigated techniques, the proposed Line Search Quasi-Newton algorithm relying on the penalty function approach results in the best performance versus complexity trade-off in the context of high capacity multiuser systems.

关键词： error statistics radio links radiofrequency interference mobile communication convex programming Newton method bit-error-rate minimisation multiuser transmission schemes multiple-input-multiple-output communication base station antennas MuT multiple-input-multiple-output system downlink multiuser interference mobile terminals performance metrics convex formulation MinBER optimisation problem MinBER-MuT system line search Quasi-newton algorithm penalty function approach

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Compact back-to-back DRA-based four-port MIMO antenna system with bi-directional diversity

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ELECTRONICS LETTERS 2018年第14期54卷 884-885页

作者： Das, G. Sharma, A. Gangwar, R. K. Sharawi, M. S. Indian Inst Technol ISM Dept Elect Engn Dhanbad 826004 Jharkhand India King Fahd Univ Petr & Minerals Dept Elect Engn Dhahran 31261 Saudi Arabia

This Letter presents a dielectric resonator (DR)-based multiple-input-multiple-output (MIMO) antenna with bi-directional pattern diversity. The back-to-back arrangement of cylindrical DR antennas DRAs (cDRAs) is one of the unique features of the proposed design. The cDRAs are placed on an FR4 substrate with a common ground plane. Each cDRA element is excited by two ports to establish a four-port MIMO antenna system. At ports 1 and 2, the top cDRA is excited via co-planar waveguide (CPW) fed conformal strip lines. In case of ports 3 and 4, the bottom cDRA is excited by microstrip line fed conformal strip lines. Isolation between all ports is improved (better than 18 dB) by generating orthogonal modes in the cDRAs and use of opposite excitations. Measured results confirm that the proposed four-port MIMO antenna system is useful for the frequency ranges between 5.4 and 6.0 GHz for WLAN applications.

关键词： dielectric resonator antennas coplanar waveguides MIMO communication microstrip lines wireless LAN antenna feeds microwave antenna arrays directive antennas microstrip antenna arrays conformal strip lines multiple-input-multiple-output system compact back-to-back DRA-based four-port MIMO antenna system bidirectional pattern diversity cylindrical DR antennas FR4 substrate cDRA element coplanar waveguide CPW antenna feeds WLAN applications frequency 5 4 GHz to 6 0 GHz

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Bandwidth-enhanced four-antenna MIMO system based on SIW cavity

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ELECTRONICS LETTERS 2020年第13期56卷 643-645页

作者： Niu, Bing-Jian Cao, Yan-Jie Ericsson AB Ericsson China R&D Ctr Beijing 100102 Peoples R China

A bandwidth-enhanced four-antenna multiple-input-multiple-output (MIMO) system based on a substrate-integrated-waveguide (SIW) cavity is proposed. By etching two long rectangular slots on the top plane of the cavity, four quarter-mode sub-cavities with the same size are constructed and then individually fed by a coaxial port to form a four-antenna MIMO system. Suitable port isolation is achieved by optimising the length and width of these slots. To enhance bandwidth, a pair of back-to-back L-shaped slots is cut to split each sub-cavity into three smaller parts. Three resonant modes are generated in these parts and merged into the operating band. A sample with the overall size of 0.58 lambda(0)x 0.58 lambda(0)x 0.02 lambda(0)has been fabricated. Measured bandwidth is enhanced from 80 to 230 MHz and measured isolation is better than 15.0 dB. Owing to covering the band of 3.40-3.60 GHz, the proposed antenna system has potential applications for fifth-generation communication.

关键词： microwave resonators antenna feeds slot antenna arrays 5G mobile communication MIMO communication substrate integrated waveguides bandwidth 80 0 MHz to 230 0 MHz frequency 3 4 GHz to 3 6 GHz fifth-generation communication bandwidth-enhanced four-antenna MIMO system antenna system quarter-mode sub-cavities substrate-integrated-waveguide cavity multiple-input-multiple-output system SIW cavity MIMO system

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An Antenna system With a Voice-Controlled Personalized Switchable Radiation Coverage

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IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS 2018年第4期17卷 693-696页

作者： Asadallah, Fatima A. Costantine, Joseph Tawk, Youssef Kanj, Rouwaida Ghorayeb, Zahi Al-Bahar, Tala Itani, Yara Christodoulou, Christos G. Amer Univ Beirut Dept Elect & Comp Engn Beirut 11072020 Lebanon Notre Dame Univ Elect & Comp Engn Dept 72 Zouk Mikael Zouk Mosbeh Lebanon Univ New Mexico Dept Elect & Comp Engn Albuquerque NM 87131 USA

This letter discusses an antenna system that steers its radiation pattern to personalize coverage in a wireless local area network scenario. The change in the pattern occurs either by mechanically rotating or electrically switching the feeding network toward the appropriate antenna structure. The user controls the personalized coverage using an Android-based voice recognition application on a mobile device. Each antenna structure operates at 5.28 GHz with 110 MHz bandwidth and an increased gain around 7.5 dB. The antenna's radiation insures a redistributed sector coverage of two diametrically opposite geographical zones that are 180 degrees apart from each other. A multiple-input-multiple-output (MIMO) implementation is also proposed with a discussion on the various possible coverage zones. The various antenna concepts are measured, and the results validate the predicted data.

关键词： Mechanical switching multiple-input-multiple-output system p-i-n didoes reconfigurable antennas

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output Feedback Stabilization for Discrete-Time systems Under Limited Communication

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IEEE TRANSACTIONS ON AUTOMATIC CONTROL 2017年第4期62卷 1927-1932页

作者： Feng, Yu Chen, Xiang Gu, Guoxiang Zhejiang Univ Technol Informat Engn Coll Hangzhou 310058 Zhejiang Peoples R China Univ Windsor Dept Elect & Comp Engn Windsor ON N9B 3P4 Canada Louisiana State Univ Dept Elect & Comp Engn Baton Rouge LA 70803 USA

This paper addresses the output feedback stabilization problem for discrete-time networked control systems with imperfect input channels, i.e., the controller-actuator channels, where both quantization error and packet dropout are involved. A stabilizability condition is first derived for the single-input-single-output (SISO) case. It is shown that stabilization over quantized lossy channel actually involves a trade-off between robust stability control and robust performance control. Furthermore, the results are expanded to triangularly decoupled multiple-input-multiple-output (MIMO) systems and a necessary and sufficient condition is deduced, which also exhibits a compromise between robust stability control and robust performance control in the individual channel as echoing the SISO case.

关键词： Limited information multiple-input-multiple-output system network control output feedback

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Generalized Multivariable Grid-Forming Control Design for Power Converters

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IEEE TRANSACTIONS ON SMART GRID 2022年第4期13卷 2873-2885页

作者： Chen, Meng Zhou, Dao Tayyebi, Ali Prieto-Araujo, Eduardo Dorfler, Florian Blaabjerg, Frede Aalborg Univ AAU Energy DK-9220 Aalborg Denmark Hitachi Energy Res S-72226 Vasteras Sweden Swiss Fed Inst Technol Automat Control Lab CH-8092 Zurich Switzerland Tech Univ Catalonia CITCEA UPC & Serra H & X00FA Nter Programme Barcelona 08028 Spain

The grid-forming converter is an important unit in the future power system with more inverter-interfaced generators. However, improving its performance is still a key challenge. This paper proposes a generalized architecture of the grid-forming converter from the view of multivariable feedback control. As a result, many of the existing popular control strategies, i.e., droop control, power synchronization control, virtual synchronous generator control, matching control, dispatchable virtual oscillator control, and their improved forms are unified into a multivariable feedback control transfer matrix working on several linear and nonlinear error signals. Meanwhile, unlike the traditional assumptions of decoupling between AC and DC control, active power and reactive power control, the proposed configuration simultaneously takes all of them into consideration, which therefore can provide better performance. As an example, a new multi-input-multi-output-based grid-forming (MIMO-GFM) control is proposed based on the generalized configuration. To cope with the multivariable feedback, an optimal and structured H-infinity synthesis is used to design the control parameters. At last, simulation and experimental results show superior performance and robustness of the proposed configuration and control.

关键词： Grid-forming power converter multiple-input-multiple-output system feedback control H-infinity synthesis

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Sensing-Based Beamforming Design for Joint Performance Enhancement of RIS-Aided ISAC systems

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IEEE TRANSACTIONS ON COMMUNICATIONS 2023年第11期71卷 6529-6545页

作者： Qian, Xiaowei Hu, Xiaoling Liu, Chenxi Peng, Mugen Zhong, Caijun Beijing Univ Posts & Telecommun State Key Lab Networking & Switching Technol Beijing 100876 Peoples R China Zhejiang Univ Coll Informat Sci & Elect Engn Hangzhou 310027 Peoples R China

Reconfigurable intelligent surface (RIS) has shown its great potential in facilitating device-based integrated sensing and communication (ISAC), where sensing and communication tasks are mostly conducted on different time-frequency resources. While the more challenging scenarios of simultaneous sensing and communication (SSC) have so far drawn little attention. In this paper, we propose a novel RIS-aided ISAC framework where the inherent location information in the received communication signals from a blind-zone user equipment is exploited to enable SSC. We first design a two-phase ISAC transmission protocol. In the first phase, communication and coarse-grained location sensing are performed concurrently by exploiting the very limited channel state information, while in the second phase, by using the coarse-grained sensing information obtained from the first phase, simple-yet-efficient sensing-based beamforming designs are proposed to realize both higher-rate communication and fine-grained location sensing. We demonstrate that our proposed framework can achieve almost the same performance as the communication-only frameworks, while providing up to millimeter-level positioning accuracy. In addition, we show how the communication and sensing performance can be simultaneously boosted through our proposed sensing-based beamforming designs. The results presented in this work provide valuable insights into the design and implementation of other ISAC systems considering SSC.

关键词： Integrated sensing and communication reconfigurable intelligent surface multiple-input-multiple-output system location estimation beamforming design

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Antenna selection and adaptive power allocation for IA-based underlay CR

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IET SIGNAL PROCESSING 2017年第6期11卷 734-742页

作者： Sam, Reba Paul Govindaswamy, Uma Maheswari PSG Inst Technol & Appl Res Dept ECE Coimbatore Tamil Nadu India PSG Coll Technol Dept ECE Coimbatore Tamil Nadu India

In underlay spectrum sharing cognitive radio (CR), the secondary users (SUs) share the spectrum with the primary users (PUs) in such a way that the interference caused by the SUs should be less than the interference temperature (IT) threshold. Interference Alignment (IA) is considered as a novel interference management technique for CR networks (CRN) which eliminates the interference at the PUs and also the interference among the SUs. However, most of the iterative solutions for IA aimed at removing the interference between the users, does not take into account the QoS (Quality of Service) of the PUs and SUs. Also the achievable rate of PUs by employing IA is less than that of the maximum achievable rate in a MIMO (multiple input multiple output) system with no interference. In this paper we first present an Antenna Selection (AS) scheme to significantly improve the QoS of PUs and then we have proposed an adaptive power allocation (PA) scheme which aims at optimum PA in view of the proportional fairness among SUs. Numerical results are derived for comparing the proposed schemes in terms of outage performance of PUs and SUs. Simulation results show the effectiveness of the proposed methods in terms of SNR.

关键词： cognitive radio radio spectrum management interference suppression antenna arrays telecommunication power management MIMO communication antenna selection scheme adaptive power allocation scheme IA-based underlay CR underlay spectrum sharing cognitive radio secondary users primary users interference alignment interference management technique multiple-input-multiple-output system proportional fairness transmission rate requirement signal-to-noise ratio

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