Aeu-International Journal of Electronics and Communications最新文献_第8页

A high-resolution DOA estimation method based on the Newton-like method 基于类牛顿法的高分辨率 DOA 估算方法

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-02-01 DOI: 10.1016/j.aeue.2024.155623

Jihui Lv , Shuai Liu , Ming Jin , Feng-Gang Yan

{"title":"A high-resolution DOA estimation method based on the Newton-like method","authors":"Jihui Lv , Shuai Liu , Ming Jin , Feng-Gang Yan","doi":"10.1016/j.aeue.2024.155623","DOIUrl":"10.1016/j.aeue.2024.155623","url":null,"abstract":"<div><div>Focusing on the problem that when the direction of arrival (DOA) interval of target signals is small and the performance of traditional DOA estimation methods, such as the multiple signal classification (MUSIC) method and reweighted smoothed <span><math><msub><mrow><mi>l</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span> norm (RSL0) method, is seriously degraded, this paper proposes a high-resolution DOA estimation method based on the Newton-like method to solve it. Firstly, the covariance matrix of the received signal is processed by column vectorization, and the signal sparse model is established according to it. Then, the sparse signals are weighted by the MUSIC method to promote sparse recovery. Secondly, a set of exponential functions is used to approximate the <span><math><msub><mrow><mi>l</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span> norm, the Lagrangian function is established by combining the constraint function, and the positive definiteness of the Hessian matrix of the Lagrangian function is analyzed. Due to the Hessian matrix of the Lagrangian function cannot always be guaranteed to be positive definite, a Newton-like method is proposed according to the positive definite part of the Hessian matrix to achieve sparse recovery and high-resolution DOA estimation. The simulation results confirm the strength of the proposed method in DOA resolution.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"190 ","pages":"Article 155623"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143183450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Single-feed, dual-polarized transmissive metasurface antenna for 5G applications

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-02-01 DOI: 10.1016/j.aeue.2024.155652

Amirmasood Bagheri, Maryam Khodadadi, Tim Brown, Pei Xiao, Mohsen Khalily

{"title":"Single-feed, dual-polarized transmissive metasurface antenna for 5G applications","authors":"Amirmasood Bagheri, Maryam Khodadadi, Tim Brown, Pei Xiao, Mohsen Khalily","doi":"10.1016/j.aeue.2024.155652","DOIUrl":"10.1016/j.aeue.2024.155652","url":null,"abstract":"<div><div>This paper presents the fabrication of a dual-polarized, single-feed, transmissive metasurface antenna, designed for enhanced performance in wireless communication systems. The antenna is specifically optimized for dual-polarization performance, targeting the mitigation of multipath propagation effects, a prevalent issue in wireless networks. It features an equal power distribution between Vertical and Horizontal polarizations and achieves a 21.93 dBi gain at a center frequency of 28 GHz. A comprehensive theoretical analysis delves into the underlying physical mechanisms of the metasurface’s polarization conversion capabilities. This involves a thorough investigation of the surface current distribution and a detailed geometric study. The paper culminates with the practical realization and experimental validation of the proposed antenna design. Measurements confirm a close alignment between simulated results and actual performance, underscoring the antenna’s efficacy in real-world scenarios for fifth-generation (5G) application.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"191 ","pages":"Article 155652"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143285389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of a ZVDS Class-DE current-driven full- bridge rectifier to compensation network capacitance design for WPT system

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-02-01 DOI: 10.1016/j.aeue.2025.155660

Chainarin Ekkaravarodome , Setthapong Feungkeaw , Anusak Bilsalam , Kamon Jirasereeamornkul , Yuttana Kumsuwan

{"title":"Analysis of a ZVDS Class-DE current-driven full- bridge rectifier to compensation network capacitance design for WPT system","authors":"Chainarin Ekkaravarodome , Setthapong Feungkeaw , Anusak Bilsalam , Kamon Jirasereeamornkul , Yuttana Kumsuwan","doi":"10.1016/j.aeue.2025.155660","DOIUrl":"10.1016/j.aeue.2025.155660","url":null,"abstract":"<div><div>The accurate, systematic, and effective design method of compensation network capacitance based on the series-series resonant topology is presented for reducing the reactive power of the wireless power transfer system. The design procedure uses a principle of a current-driven Class-DE full-bridge zero-voltage and zero-derivative-switching rectifier, a Class-D full-bridge zero-voltage-switching inverter, and a tightly coupled transformer. The key parameters of the Class-DE current-driven full-bridge zero-voltage and zero-derivative-switching rectifier as a function of diode conduction duty ratio are derived from the time-domain analysis with Fourier series, such as the normalized input resistance, the normalized input reactance, and the relationship of the input current and output voltage. Moreover, the advantages of the Class-DE current-driven full-bridge rectifier are that the diodes turn ON with zero-voltage-switching at low <em>dυ/dt</em>, turn OFF with zero-current switching and zero-voltage and zero-derivative switching at low <em>di/dt</em>. As a result, the switching losses and the switching noise considerably reduced. The simulation and experimental results were in good agreement with those predicted theoretically, and the maximum transfer power and the system efficiency at a transfer distance of 50 mm are 1.8 kW and 93.38 %, respectively. Therefore, the rectifier is especially suitable for high-frequency and high-efficiency resonant DC/DC converters in wireless power transfer applications.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"191 ","pages":"Article 155660"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143285836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Forward-inverse-hybrid modeling of microstrip antennas using decision tree-based machine learning algorithms for space communication

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-02-01 DOI: 10.1016/j.aeue.2025.155662

Anjani Kumar , Taimoor Khan , Debanjali Sarkar

{"title":"Forward-inverse-hybrid modeling of microstrip antennas using decision tree-based machine learning algorithms for space communication","authors":"Anjani Kumar , Taimoor Khan , Debanjali Sarkar","doi":"10.1016/j.aeue.2025.155662","DOIUrl":"10.1016/j.aeue.2025.155662","url":null,"abstract":"<div><div>This article presents a machine learning (ML) framework for forward, inverse, and hybrid modeling in electromagnetic problems, focusing on single-, dual-, and four-port notched microstrip antennas used in satellite environments. These antennas exhibit maximum notched frequencies of 4.2 GHz, 6 GHz, and 8.2 GHz for the single-port, dual-port, and four-port configurations, respectively, making them well-suited for space communication in low Earth orbit and medium Earth orbit. The study explores the application of binary decision trees, AdaBoost, and random forest regression (RFR) for these modeling tasks. The single-, dual-, and four-port microstrip antennas feature three, four, and two notched bands, respectively. The accuracy of various ML techniques is validated by comparing their predicted results with those obtained from a high-frequency structure simulator (HFSS). Machine learning techniques are used to predict the mean absolute error (MAE), mean square error (MSE), root mean square error (RMSE), and coefficient of determination for the geometrical and electrical parameters of these antennas. Among the tested methods, AdaBoost algorithms demonstrated significantly superior performance compared to binary decision trees and random forest regression.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"191 ","pages":"Article 155662"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143285807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An enhanced sliding window Fourier analysis with a time delay compensation for single-phase active power filter

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-02-01 DOI: 10.1016/j.aeue.2024.155647

Chakrit Panpean , Phonsit Santiprapan , Jeerawan Homjan , Kongpol Areerak

{"title":"An enhanced sliding window Fourier analysis with a time delay compensation for single-phase active power filter","authors":"Chakrit Panpean , Phonsit Santiprapan , Jeerawan Homjan , Kongpol Areerak","doi":"10.1016/j.aeue.2024.155647","DOIUrl":"10.1016/j.aeue.2024.155647","url":null,"abstract":"<div><div>The performance of an active power filter (APF) to eliminate the harmonic in the power system depends, firstly, on the harmonic detection process. An accurate reference current calculation and time delay compensation for the harmonic detection process are therefore focused. This paper introduces the enhanced sliding window Fourier analysis (SWFA). The proposed technique is to combine the SWFA with Lagrange’s equation. Herein, the amplitude-phase calculation of the SWFA method and the reference current prediction at two sampling times are the key techniques to improve harmonic detection for digital implementation. The hardware-in-the-loop simulation on an eZdsp™ F28335 board is used to verify and evaluate the performance of the proposed harmonic detection technique. The testing results indicated that the APF with the enhanced SWFA approach can compensate the time delay and calculate the harmonic and reactive currents. After compensation, it would also improve the power factor and reduce the percentage of total harmonic distortion within the IEEE standard 519 even though the voltage source is in sinusoidal or distorted conditions.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"190 ","pages":"Article 155647"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143183569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Physical layer authentication for the downlink of massive MIMO systems

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-02-01 DOI: 10.1016/j.aeue.2024.155646

Chaotian Lu, Lingling Tao, Weiyang Xu

引用次数: 0

A coupling compensation method to improve the absorption effect at wide angles

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-02-01 DOI: 10.1016/j.aeue.2024.155617

Yixin Liu, Xiao Ding, Yin Chen

{"title":"A coupling compensation method to improve the absorption effect at wide angles","authors":"Yixin Liu, Xiao Ding, Yin Chen","doi":"10.1016/j.aeue.2024.155617","DOIUrl":"10.1016/j.aeue.2024.155617","url":null,"abstract":"<div><div>In this paper, we proposed a coupling compensation method based on equivalent transmission line model to solve the deterioration of absorption performance of the electromagnetic absorber under large incident angle for TE polarization. By adding decoupling compensation layer determined by the proposed method on the original single-layer structure, the issue of inadequate impedance matching has been addressed. The absorption performance under target angle was improved while maintaining that of the original structure under normal incidence. Compared to the original structure, the 90% absorption bandwidth is expanded from 9.6–10.6 GHz to 4.3–12.4 GHz, and the relative absorption bandwidth is increased from 9.9% to 97% under TE-polarized waves with the target incident angle (<span><math><mrow><mn>50</mn><mo>°</mo></mrow></math></span>). While the performance of absorption under TM-polarized waves with the target angle remains nearly unchanged, thereby indicating that both polarization achieve a wide absorption bandwidth under incidence of <span><math><mrow><mn>0</mn><mo>°</mo></mrow></math></span> and target angle. Additionally, the proposed method effectively enhances the absorption not only under the target angle, but also in close proximity to it. The proposed method is proved by full-wave simulation and experimental measurements. This work offers enhanced flexibility for diverse scenarios, including the option of a detachable absorber.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"190 ","pages":"Article 155617"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143183301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A novel low-energy half-select-free 9T SRAM cell based on CNTFETs with enhanced write performance

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-02-01 DOI: 10.1016/j.aeue.2024.155639

Seyyed Hassan Hadi Nemati, Nima Eslami, Mohammad Hossein Moaiyeri

{"title":"A novel low-energy half-select-free 9T SRAM cell based on CNTFETs with enhanced write performance","authors":"Seyyed Hassan Hadi Nemati, Nima Eslami, Mohammad Hossein Moaiyeri","doi":"10.1016/j.aeue.2024.155639","DOIUrl":"10.1016/j.aeue.2024.155639","url":null,"abstract":"<div><div>This work proposes a novel 9 T SRAM cell based on carbon nanotube field-effect transistors (CNTFETs). The design features an innovative writing technique, leveraging a floating method to write a ’1′ into the cell, significantly enhancing writing ability. Including row and column-based control signals ensures that data in half-selected cells remains stable during operations. The read operation is optimized for energy efficiency using only a single CNTFET. The symmetric structure of the proposed design, utilizing four inverters and a single transistor for the read operation, minimizes the overall overhead compared to 9 T SRAM cells. The results demonstrate that the proposed design achieves a 24 % improvement in write stability and reduces overall energy consumption for both read and write operations compared to existing SRAM cell designs. The energy consumption of the proposed design during read and write operations is approximately 93.7 % and 30 % lower, respectively than that of the compared designs at a supply voltage of 0.6 V. Moreover, Monte Carlo simulations were performed to assess the practical performance of the proposed design, revealing that no failures occurred during any operations.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"190 ","pages":"Article 155639"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143183570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An adaptive Gm cell compensation technique for fast transient and high efficiency LDO without on/off-chip capacitor

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-02-01 DOI: 10.1016/j.aeue.2024.155640

Jin Xie , Dapeng Ye , Can Wang , Jinghu Li , Zhicong Luo

{"title":"An adaptive Gm cell compensation technique for fast transient and high efficiency LDO without on/off-chip capacitor","authors":"Jin Xie , Dapeng Ye , Can Wang , Jinghu Li , Zhicong Luo","doi":"10.1016/j.aeue.2024.155640","DOIUrl":"10.1016/j.aeue.2024.155640","url":null,"abstract":"<div><div>This paper introduces a high current efficiency capacitor-less low dropout regulator (LDO) designed for low-power and consumer electronic applications, focusing on fast transient response and high power supply rejection (PSR) at high-frequency and heavy loads. The proposed adaptive <span><math><msub><mrow><mi>G</mi></mrow><mrow><mi>m</mi></mrow></msub></math></span> cell compensation (AGCC) technique replaces the traditional capacitor compensation, ensuring stability across the full load range while preserving bandwidth. The design resolves the trade-off between bandwidth and power consumption by integrating adaptive biasing and substrate driving techniques, achieving fast transient response and high PSR at high-frequency. The LDO operates with input voltages from 1.0 V to 1.2 V and an output voltage of 0.8 V. It maintains a quiescent current of 223 nA at 27 °C with no load. The current efficiency exceeds 88.5% and peaks at 99% for loads between 10 <span><math><mi>μ</mi></math></span>A and 20 mA. The worst-case post-layout simulation in a 40 nm CMOS process with an area of 0.001925 mm<span><math><msup><mrow></mrow><mrow><mn>2</mn></mrow></msup></math></span> shows the PSR is below −17 dB and −37 dB at 1 MHz for 1 mA and 20 mA loads, with a figure of merit of 0.027 fs.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"190 ","pages":"Article 155640"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143183574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fractional-order bi-Hopfield neuron coupled via a multistable memristor: Complex neuronal dynamic analysis and implementation with microcontroller

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-02-01 DOI: 10.1016/j.aeue.2025.155661

Victor Kamdoum Tamba , Arsene Loic Mbanda Biamou , Viet-Thanh Pham , Giuseppe Grassi , François Kapche Tagne , Armand Cyrille Nzeukou Takougang

{"title":"Fractional-order bi-Hopfield neuron coupled via a multistable memristor: Complex neuronal dynamic analysis and implementation with microcontroller","authors":"Victor Kamdoum Tamba , Arsene Loic Mbanda Biamou , Viet-Thanh Pham , Giuseppe Grassi , François Kapche Tagne , Armand Cyrille Nzeukou Takougang","doi":"10.1016/j.aeue.2025.155661","DOIUrl":"10.1016/j.aeue.2025.155661","url":null,"abstract":"<div><div>The Hopfield neuron is an artificial neuron model used for pattern memorization and recognition. It exhibits a complex dynamic with stable states corresponding to memorized patterns. In order to grasp a more complete representation of the information exchange between two neurons, emphasizing the importance of neuronal connections in brain processing, we propose in this work the coupling of two fractional-order Hopfield neurons via a fractional-order flux-controlled multistable memristor. Each of these two neurons incorporates a self-coupling memristive component, called an autapse memristor. Additionally, the second neuron is subjected to an external electromagnetic radiation, simulated by an additional memristor. The I-V characteristics of the memristors integrated in this model are analyzed through numerical simulations. The simulations of model dynamics versus its diverse parameters have revealed rich and complex dynamical behaviors. These simulations demonstrate that the proposed model generates a variety of homogeneous and heterogeneous chaotic attractors, distributed at diverse locations. The elaborated memristor coupled fractional-order bi-Hopfield neuron MCFBHN model is implemented on an Arduino-Due platform. A comparison of the results of the two approaches shows good consistency.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"191 ","pages":"Article 155661"},"PeriodicalIF":3.0,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143285270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0