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48th IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2023

作者： Santamaria, Ignacio Soleymani, Mohammad Jorswieck, Eduard Gutiérrez, Jesús Universidad de Cantabria Department of Communications Engineering Santander39005 Spain Universität Paderborn Signal and System Theory Group Paderborn33098 Germany Technische Universität Braunschweig Institute for Communications Technology Braunschweig38106 Germany 15236 Germany

ISBN: (纸本)9781728163277

We address the problem of interference leakage (IL) minimization in the K-user multiple-input multiple-output (MIMO) interference channel (IC) assisted by a reconfigurable intelligent surface (RIS). We describe an iterative algorithm based on block coordinate descent to minimize the IL cost function. A reformulation of the problem provides a geometric interpretation and shows interesting connections with envelope precoding and phase-only zero-forcing beamforming problems. As a result of this analysis, we derive a set of necessary (but not sufficient) conditions for a phase-optimized RIS to be able to perfectly cancel the interference on the K-user MIMO IC. © 2023 IEEE.

关键词： interference channel interference leakage minimization multiple-input multiple-output Reconfigurable intelligent surface (RIS)

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Decision Feedback Channel Estimation for Integrated Mobile VLCP Based on STBC-MIMO

Decision Feedback Channel Estimation for Integrated Mobile V...

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2023 Asia Communications and Photonics Conference/2023 International Photonics and Optoelectronics Meetings, ACP/POEM 2023

作者： Sun, Yuzhe You, Xiaodi Chen, Jian Yu, Changyuan Gao, Mingyi Shen, Gangxiang School of Electronic and Information Engineering Soochow University Suzhou China School of Telecommunications and Information Engineerine Nanjing University of Posts and Telecommunications Nanjing China The Hong Kong Polytechnic University Department of Electronic and Information Engineering Hong Kong

Decision feedback channel estimation is employed to enhance the performance of an integrated mobile VLCP system based on STBC-MIMO, where reliable communication and positioning can simultaneously be achieved when rece... 详细信息

ISBN: (纸本)9798350312614

关键词： decision feedback channel estimation multiple-input multiple-output space-time block coding visible light communication visible light positioning

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Hybrid Beamforming-based Beam Tracking using Angular speed in Massive MIMO Systems 14

Hybrid Beamforming-based Beam Tracking using Angular speed i...

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14th International Conference on Information and Communication Technology Convergence, ICTC 2023

作者： Sin, Seungseok Cho, Jihun Liu, Huaping Moon, Sangmi Sim, Yuna Kim, Kyunam Kim, Jihyung Hwang, Intae Chonnam National University Deptartment of Ict Convergences System Engineering Gwangju Korea Republic of Oregon State University United States Korea Nazarene University Department of It Artificial Intelligence Cheonan Korea Republic of Alps Electric Korea Co. Ltd Gwangju Korea Republic of Electronics and Telecommunications Research Institute Spatial Wireless Transmission Research Section Daejeon Korea Republic of Chonnam National University Department of Electronic Engineering and Department of Ict Convergence System Engineering Gwangju Korea Republic of

ISBN: (纸本)9798350313277

This paper proposes an angular speed 3D-based beam tracking method using hybrid beamforming. We propose a new beam tracking algorithm that enables dynamic pilot insertion based on closed loop feedback control by utilizing the Line of Sight (LoS) path of the channel between T-BS and UAV-UE. Simulations show that the proposed beam tracking method has improved overall performance in terms of beamforming gain and spectral efficiency (SE). © 2023 IEEE.

关键词： 3D beam tracking hybrid beamforming multiple-input multiple-output orthogonal frequency division multiplexing

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Multi-stream signals separation based on space-time-isomeric (SPATIO) array using metasurface antennas

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Science China(Information Sciences) 2024年第2期67卷 181-200页

作者： Yangming LOU Liang JIN Huiming WANG Zhou ZHONG Junyan DAI PLA Strategic Support Force Information Engineering University School of Information and Communications Engineering Xi'an Jiaotong University State Key Laboratory of Millimeter Waves Southeast University

In spatial domain signal processing, it is necessary to equip more antennas at the receiver to improve spatial demultiplexing capability. However, increasing the number of antennas under restricted space will reduce antenna spacing and raise the channel correlation, making the number of signal streams spatially demultiplexed much smaller than that of antennas. This paper proposes a method to design a space-timeisomeric(SPATIO) array based on metasurface antennas under wireless multipath conditions. Each antenna in this array has a different pattern and varies independently with time, reducing the channel correlation by superposing multipath at distinct positions and moments. Based on the SPATIO array, we present an array parameter design scheme based on infinity norm minimization, which can maximize the received energy of each stream while separating multi-stream received signals. Simulation results illustrate the performance of the SPATIO array for multi-stream signal reception. Compared with conventional multiple-input multipleoutput arrays, the proposed array can reduce the bit error rate by one order of magnitude under the same simulation conditions.

关键词： multiple-input multiple-output metasurface antenna space-time-isomeric array multipath channel degree of freedom

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面向三频WiFi应用的分集玻璃天线

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Engineering 2023年第4期23卷 157-169,M0007页

作者：胡鹏飞梁国华陆贵文潘咏梅郑少勇 State Key Laboratory of Terahertz and Millimeter Waves and Department of Electrical Engineering City University of Hong KongHong Kong 999077China School of Electronics and Information Technology(School of Microelectronics) Sun Yat-sen UniversityGuangzhou 510006China Guangdong Provincial Key Laboratory of Optoelectronic Information Processing Chips and Systems Sun Yat-sen UniversityGuangzhou 510006China Information and Communication Technology Center CityU Shenzhen Research InstituteShenzhen 518057China School of Electronic and Information Engineering South China University of TechnologyGuangzhou 510630China

本文研究了两种新型极化和模式分集玻璃介质谐振器天线(DRAs),用于三频段(2.4 GHz、5.2 GHz和5.8 GHz)无线保真(WiFi)应用。研究比较了这两种DRAs以及一种新型空间分集玻璃DRA,以确定哪种分集天线最适合WiFi路由器应用。同时,将这三种... 详细信息

本文研究了两种新型极化和模式分集玻璃介质谐振器天线(DRAs),用于三频段(2.4 GHz、5.2 GHz和5.8 GHz)无线保真(WiFi)应用。研究比较了这两种DRAs以及一种新型空间分集玻璃DRA,以确定哪种分集天线最适合WiFi路由器应用。同时,将这三种分集玻璃DRAs与一个商业空间分集单极对进行比较,以评估玻璃DRA在WiFi路由器应用中的性能。在极化分集天线中,采用双端口馈电方案来激发不同的DRA模式,并通过使用阶梯形DRA来调节DRA模式的频率。对于模式分集设计,引入堆叠式DRA来扩展圆锥和正侧向辐射模的带宽。所有三种新型分集天线均得到了实验验证。在实验中,还测量了三种玻璃分集天线和参考空间分集单极子天线的误码率(BER),并对结果进行了比较和讨论。实验结果表明,在三种天线中,极化分集全向DRA具有最稳定的BER。

关键词： Wireless fidelity Diversity antennas Multi-frequency Glass Dielectric resonator antennas multiple-input multiple-output

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Joint radio frequency front-end and digital back-end antijamming scheme based on a metasurface antenna array

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Frontiers of Information Technology & Electronic Engineering 2023年第12期24卷 1739-1751页

作者： Yangming LOU Liang JIN Wenyu JIANG Shuaifang XIAO PLA Strategic Support Force Information Engineering University Zhengzhou450000China

An array’s degree of freedom(DoF)determines the number of jamming incidents that can be managed and the antijamming *** arrays can improve the DoF only by increasing the number of *** the other hand,when the received signal is digitized,high-power jamming will reduce the number of bits used to represent the desired signal,further increasing the difficulty of back-end antijamming based on digital signal *** this paper,we propose a joint radio frequency(RF)front-end and digital back-end antijamming scheme based on a metasurface antenna *** metasurface antennas can rapidly switch patterns when receiving signals,so that a single channel can be equivalent to multiple channels and increase the *** use independent component analysis to estimate the channel and then optimize the array parameters under the minimum signal-to-jamming ratio constraint of each *** proposed scheme works well under high-power jamming conditions by suppressing jamming at the RF front end and using a low-precision analog-to-digital *** results show that the proposed scheme reduces the bit error rate of the received signals by one order of magnitude compared with the conventional array.

关键词： Antijamming multiple-input multiple-output Metasurface antenna array Independent component analysis

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Distributed Interference Alignment Algorithm for multiple-input multiple-output Networks with Uncoordinated Interference

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COGNITIVE COMPUTATION 2013年第2期5卷 215-224页

作者： Zhong, Liang Zhu, Guangxi Kong, Zhengmin Liu, Jian Huazhong Univ Sci & Technol Wuhan Natl Lab Optoelect Natl Engn Lab Next Generat Internet Access Syst Dept Elect & Informat Engn Wuhan 430074 Peoples R China Wuhan Univ Dept Automat Wuhan 430072 Peoples R China

This paper introduces a novel two-step interference alignment beamforming algorithm for a multiple-antenna interference channel with uncoordinated interference. The proposed algorithm performs subspace division of the signal space by using the total least squares method to use all available degrees of freedom in the system. The algorithm also uses the minimum mean square error as a criterion to maximize the sum rate of the system. Simulation results indicate that the sum rate of the proposed algorithm outperforms the sum rates of previous works in the context of a network with uncoordinated interference. The performance levels of these algorithms are also compared for different uncoordinated interference strengths. Almost the same trend is obtained for the sum rate performance.

关键词： multiple-input multiple-output Interference alignment Total least squares Minimum mean square error

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Scalp-Implanted Ultra-Wideband Circularly Polarized MIMO Antenna for Biotelemetry Systems

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SENSORS 2024年第23期24卷 7522页

作者： Song, Zhiwei Shi, Youwei Zheng, Xianren Wang, Yuchao Xinjiang Univ Sch Elect Engn Shengli Rd 666 Urumqi 830046 Peoples R China

This paper presents an innovative, compact, dual-element, implantable, ultra-wideband, circularly polarized multiple-input multiple-output (MIMO) antenna designed to operate within the 2.45 GHz industrial, scientific, and medical band, and both of its radiating units are circularly polarized antennas with polarization diversity. Specifically, antenna-1 exhibits left-handed circular polarization properties, while antenna-2 demonstrates right-handed circular polarization properties. The slots in the radiating patch and ground plane help the antenna achieve 690 MHz (2.14-2.83 GHz) ultra-wide bandwidth characteristics and circularly polarized characteristics. Additionally, a slit connecting two U-slots on the ground plane allows the antenna to achieve a wide effective circularly polarized axial ratio bandwidth of 400 MHz (2.23-2.63 GHz). The antenna is compact, with dimensions of 0.065 x 0.057 x 0.0042 lambda 03 (lambda 0 represents the free-space wavelength corresponding to the lowest operating frequency). The proposed antenna system's performance was evaluated with a seven-layer homogeneous human head model, a real human head model, and minced pork. This evaluation revealed that the antenna attained a peak gain of -24.1 dBi and an isolation level of 27.5 dB. Furthermore, the assessment included the antenna's link margin (LM), key MIMO channel characteristics, and Specific Absorption Rate (SAR) metrics. The results indicate that the antenna performs exceptionally well.

关键词： biotelemetry circular polarization multiple-input multiple-output polarization diversity ultra wideband

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Two-Dimensional Ultrasonic Air Temperature Tomography Based on Phase Shift Processing of Multifrequency Measurements

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IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT 2024年 73卷

作者： Sukhanov, Dmitry Khalil, Amoon Tomsk State Univ Fac Radiophys Tomsk 634050 Russia Higher Inst Appl Sci & Technol Damascus 31983 Syria

An iterative method of transmission tomography of air temperature heterogeneities based on ultrasonic sensing is proposed. The direct dependence of the speed of sound in air on temperature is considered. Air flow and related nonstationary effects are not considered. A change in the speed of sound affects the change in the phase shift of ultrasonic waves passing through the area under study. The reconstruction of the spatial distribution of heterogeneities is carried out by tomographic processing of phase differences of waves passing in forward and reverse directions. The phase differences between forward and reverse propagation waves in an a priori specified medium are considered. In the first iteration, a homogeneous environment is considered as an a priori given environment, and in the second iteration, the reconstructed heterogeneous environment obtained in the first iteration is considered. The results of numerical modeling and the results of experimental studies at frequencies from 38 to 43 kHz are presented. The possibility of reconstructing the distribution of temperature of air is shown.

关键词： Tomography Image reconstruction Receivers Acoustics Temperature measurement Temperature distribution Media Air temperature heterogeneities inverse problems multiple-input multiple-output transmission tomography ultrasonic imaging

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Power and Beamforming Control with Generalized Nash Game for Energy-Aware mmWave Networks 12

Power and Beamforming Control with Generalized Nash Game for...

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IEEE 12th Sensor Array and Multichannel Signal Processing Workshop (SAM)

作者： Wang, Wenbo Leshem, Amir Bar Ilan Univ Fac Engn IL-52900 Ramat Gan Israel

ISBN: (纸本)9781665406338

This paper studies the problem of joint beamforming and power allocation in ad-hoc mmWave networks. Over the shared spectrum, a number of multi-input-multi-output links attempt to minimize their own supply power by adapting individual transmit powers and beamformers in a self-organized manner. With a two-stage framework of decentralized strategy searching, we address a family of distributed optimization problems with non-convex objectives and coupling-strategy dependent qualityof-service constraints. The proposed scheme allows each link to iteratively adapt its power level in a sub-stage of Generalized Nash Equilibrium (GNE) search, and its beamforming filters in a substage of Minimum Mean Square Error (MMSE)-based receiver shaping, respectively. Our convergence analysis of GNE provides the theoretical guarantee for the convergence of the proposed algorithm. Simulation results show that with our proposed scheme, local link state information suffices to obtain a near optimal overall performance without any need for further acquiring the interference channel state information.

关键词： multiple-input multiple-output generalized Nash equilibrium multi-link energy-aware MSE criterion

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