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

A closed-loop neural recording analog front-end with low noise and automatic gain control amplifiers 具有低噪声和自动增益控制放大器的闭环神经记录模拟前端

IF 3.2 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-08-07 DOI: 10.1016/j.aeue.2025.155976

Mohammadamin Mohtashamnia, Mohammad Yavari

{"title":"A closed-loop neural recording analog front-end with low noise and automatic gain control amplifiers","authors":"Mohammadamin Mohtashamnia, Mohammad Yavari","doi":"10.1016/j.aeue.2025.155976","DOIUrl":"10.1016/j.aeue.2025.155976","url":null,"abstract":"<div><div>This paper presents a novel analog front-end including both an analog circuit and an analog-to-digital converter (ADC) for closed-loop neural recording. The analog part contains a low-noise amplifier (LNA), an automatic gain control amplifier (AGCA), and a voltage buffer. For noise and power performance optimization, a novel LNA structure is introduced. The proposed LNA employs two current mirror amplifiers, both incorporating class-AB output stages. Additionally, the first stage utilizes source-degenerated current mirrors. Using the AGCA allows for dynamic adjustment of the voltage gain during periods without artifacts, which reduces the precision requirements of the ADC. This improves overall system efficiency by optimizing signal amplification while minimizing the ADC’s workload. A 10-bit successive approximation register (SAR) ADC is incorporated to digitize the amplified signals. To judge the operation of the suggested circuit, extensive circuit level simulations were conducted using 180 nm TSMC CMOS technology within the Cadence environment. The circuit operates from a 1.8 V power supply and at 37 °C, consuming 9 μW of power while processing signals with a 10 kHz bandwidth. It reaches a dynamic range of 81.83 dB and a maximum signal-to-noise and distortion ratio (SNDR) of 58.40 dB, demonstrating competitive performance when compared to existing solutions in the field.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"201 ","pages":"Article 155976"},"PeriodicalIF":3.2,"publicationDate":"2025-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144851836","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

HAPS assisted cooperative offloading for space–air–ground integrated networks HAPS辅助天空地一体化网络协同卸载

IF 3.2 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-08-06 DOI: 10.1016/j.aeue.2025.155960

Saadet Simay Yılmaz , Berna Özbek , Eylem Erdoğan

{"title":"HAPS assisted cooperative offloading for space–air–ground integrated networks","authors":"Saadet Simay Yılmaz , Berna Özbek , Eylem Erdoğan","doi":"10.1016/j.aeue.2025.155960","DOIUrl":"10.1016/j.aeue.2025.155960","url":null,"abstract":"<div><div>Mobile edge computing (MEC) has significantly enhanced computational capabilities at the network edge, enabling computation-intensive applications. However, traditional MEC implementations face significant challenges in areas without reliable terrestrial network infrastructure, such as rural regions or disaster-affected zones. To address this, we present a novel MEC-enabled space–air–ground integrated network (SAGIN) framework that combines high-altitude platform station (HAPS) and low Earth orbit (LEO) satellite to ensure comprehensive coverage and reduce execution delays for ground users (GUs) in areas lacking terrestrial infrastructure. By leveraging the complementary capabilities of HAPS, which provide wide-area coverage and reliable connectivity, and LEO satellites, which offer high-throughput communication, the proposed SAGIN framework enhances computation offloading. We propose a cooperative approach between GUs and the LEO satellite via the HAPS to maximize offloaded data while satisfying stringent delay constraints under a partial offloading mode. A nonlinear optimization problem is formulated to minimize execution delay while increasing offloaded data by jointly optimizing task offloading decisions and resource allocation between the HAPS and LEO satellite. Simulation results show that the proposed cooperative offloading scheme significantly outperforms random and non-cooperative schemes considering execution delay. These results highlight that the proposed cooperative, HAPS-assisted SAGIN framework effectively enables low-delay edge computing in infrastructure-limited regions.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"201 ","pages":"Article 155960"},"PeriodicalIF":3.2,"publicationDate":"2025-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144809652","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 5G Antenna Design using Metamaterial 基于超材料的新型5G天线设计

IF 3.2 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-07-30 DOI: 10.1016/j.aeue.2025.155974

Shilpa Jangid, R.S. Meena

引用次数: 0

RF energy harvester design using a dual-band rectenna for ultra-low-power electronic systems 采用双频整流天线的射频能量采集器设计，用于超低功耗电子系统

IF 3.2 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-07-30 DOI: 10.1016/j.aeue.2025.155962

Shabnam Parween, Banani Basu, Taimoor Khan

{"title":"RF energy harvester design using a dual-band rectenna for ultra-low-power electronic systems","authors":"Shabnam Parween, Banani Basu, Taimoor Khan","doi":"10.1016/j.aeue.2025.155962","DOIUrl":"10.1016/j.aeue.2025.155962","url":null,"abstract":"<div><div>The advent of Radio Frequency (RF) energy harvesting technology has become a viable solution as an energy source for low-power electronic devices, including Internet of Things (IoT), wireless sensors, and microcontroller unit (MCU) applications. This article presents a compact dual-band RF energy harvester incorporating a novel Defected Ground Structure (DGS) based monopole antenna. It is integrated with a Pi-type rectifier. The proposed rectenna operates at two bands of 0.9 GHz and 1.8 GHz, corresponding to the GSM frequency bands, which are abundantly present in urban environments. The system achieves 68.94 % peak power conversion efficiency (PCE) for −5 dBm input. Even with a lower input power of −10 dBm, the measured PCE values are 54.74 % at 0.9 GHz and 52.22 % at 1.8 GHz, demonstrating the high sensitivity and efficiency of the rectification circuit under low-power conditions. Furthermore, experimental evaluations of the rectenna successfully generated a DC voltage of 0.606 V at −11.2 dBm in an anechoic chamber and 0.50 V at −13.1 dBm in an outdoor environment. It establishes the system’s effectiveness for real-world scenarios. This design demonstrates superior performance and introduces a novel approach tailored for practical energy harvesting applications.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"201 ","pages":"Article 155962"},"PeriodicalIF":3.2,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144772680","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

ANYF: A hybrid deep learning model for radiation sources localization through radio maps automatic interpretation ANYF：一种通过无线电地图自动解释进行辐射源定位的混合深度学习模型

IF 3.2 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-07-30 DOI: 10.1016/j.aeue.2025.155963

Mengting Feng, Wei Shao, Jun Jin, Yang Liu, Yechao Luo, Hang Zou, Hui Jiang, Zhiyuan He

{"title":"ANYF: A hybrid deep learning model for radiation sources localization through radio maps automatic interpretation","authors":"Mengting Feng, Wei Shao, Jun Jin, Yang Liu, Yechao Luo, Hang Zou, Hui Jiang, Zhiyuan He","doi":"10.1016/j.aeue.2025.155963","DOIUrl":"10.1016/j.aeue.2025.155963","url":null,"abstract":"<div><div>To address the insufficient accuracy challenge of traditional radiation sources localization methods in complex urban environments, this paper proposes a hybrid deep learning model for radiation sources localization through radio maps (RMs) automatic interpretation. Firstly, a multimodal dataset is generated for training hybrid deep learning networks and locating radiation sources, with RMs as key data to be interpreted. Secondly, an atrous spatial pyramid pooling (ASPP) and convolutional block attention module (CBAM) enhanced UNet (ACU-Net) network is designed as the UNet network combined with the ASPP module and the CBAM to realize the segmentation of the radiation source area. Finally, a You Only Look Once version 8 (YOLOv8) with focal modulation (FM) (YOLO-FM) network is built as the YOLOv8 improved by replacing the spatial pyramid pooling feature (SPPF) module with the FM to detect small objects and perform high-accuracy radiation sources localization. These two networks, ACU-Net and YOLO-FM, thus constitute the hybrid deep learning model named ACU-Net-YOLO-FM (ANYF). The simulation experiment results show that the mean localization error of the proposed model in the target area is 2.37 meters, and the mean error when directly transferred to another urban area without any fine-tuning is 3.54 meters. In addition, we conducted real-world measurement experiments, which resulted in a mean error of 6.75 meters, demonstrating that the proposed model provides a feasible solution for supervising radiation sources and detecting interference.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"201 ","pages":"Article 155963"},"PeriodicalIF":3.2,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144772774","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

Highly efficient, broadband, hexagonal shaped rectenna for energy harvesting in IoT applications 高效、宽带、六角形整流天线，用于物联网应用中的能量收集

IF 3.2 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-07-30 DOI: 10.1016/j.aeue.2025.155957

Rajesh Das, M.V. Swati, Gaurav Singh Baghel

{"title":"Highly efficient, broadband, hexagonal shaped rectenna for energy harvesting in IoT applications","authors":"Rajesh Das, M.V. Swati, Gaurav Singh Baghel","doi":"10.1016/j.aeue.2025.155957","DOIUrl":"10.1016/j.aeue.2025.155957","url":null,"abstract":"<div><div>This study shows an efficient broadband rectenna for energy harvesting in Internet of Things (IoT) applications. It covers the 3.6–6.45 GHz band, which includes the mid-5G band (3.6-3.8 GHz), the Wi-Fi 5 GHz band (5.150–5.850 GHz), and the lower 6 GHz (5.925–6.425 GHz) Wi-Fi 6E band. To make the system more cost-effective, the rectenna is made up of a broadband antenna, an Impedance Matching Network (IMN), and a rectifier circuit built on the Flame Retardant (FR4) substrate with a compact optimized area of <span><math><mrow><mn>30</mn><mo>×</mo><mn>30</mn><mspace></mspace><msup><mrow><mi>mm</mi></mrow><mrow><mn>2</mn></mrow></msup></mrow></math></span>. Proper impedance matching and bandwidth are provided via a Coplanar Waveguide (CPW) fed hexagonal patch, tuning stubs, and a slot on the partial ground. With enhanced radiation efficiency, the suggested antenna displays an omnidirectional radiation pattern. A Schottky diode (Infineon BAT15-03 W) based rectifier circuit is then used to rectify the received electromagnetic signal. The impedance-matching network connects the circuit to the antenna. By using transmission lines for broadband frequency operation, the suggested Impedance Matching Network (IMN) lowers the complexity of the rectenna. With a 1 K<span><math><mi>Ω</mi></math></span> load resistance, it exhibits a continuous efficiency above 40% and output voltage above 1.3 V throughout the frequency range 3.6-6.45 GHz, with the highest recorded Power Conversion Efficiency (PCE) of 59.82% and output voltage of 1.9 V at 5.8 GHz at input power 9 dBm. The results confirm that the recommended rectenna is suitable for low-power applications throughout a wide frequency range.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"201 ","pages":"Article 155957"},"PeriodicalIF":3.2,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144738428","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 minimal memristor emulator using DVCCTA for analog neuromorphic logic 一个使用DVCCTA模拟神经形态逻辑的最小忆阻器模拟器

IF 3.2 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-07-29 DOI: 10.1016/j.aeue.2025.155966

Prerna Rana , Ashish Ranjan , J. Vista , Alak Majumder

引用次数: 0

High-isolation broadband 12-port X-band MIMO antenna with via decoupling, polarization conversion, and RCS reduction 高隔离宽带12端口x波段MIMO天线，通过去耦，极化转换，并减少RCS

IF 3.2 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-07-29 DOI: 10.1016/j.aeue.2025.155964

Inderpreet Kaur , Banani Basu

引用次数: 0

Joint optimization design of cross-domain NOMA-OTFS scheme in vehicular MU-MISO system 车载MU-MISO系统跨域NOMA-OTFS方案联合优化设计

IF 3.2 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-07-29 DOI: 10.1016/j.aeue.2025.155956

Hao Xu , Zhiquan Bai , Heng Wang , Runlai Wang , Pengwei Wang , Hongwu Liu , Guimin Su

{"title":"Joint optimization design of cross-domain NOMA-OTFS scheme in vehicular MU-MISO system","authors":"Hao Xu , Zhiquan Bai , Heng Wang , Runlai Wang , Pengwei Wang , Hongwu Liu , Guimin Su","doi":"10.1016/j.aeue.2025.155956","DOIUrl":"10.1016/j.aeue.2025.155956","url":null,"abstract":"<div><div>Orthogonal time-frequency space (OTFS) modulation and non-orthogonal multiple access (NOMA) offer significant advantages in vehicular networks with high Doppler shift, rapid time-varying channels, and multi-user environments. This paper proposes the joint optimization design of cross-domain NOMA-OTFS scheme in vehicular multi-user multiple-input single-output (MU-MISO) system, utilizing a frequency domain linear equalizer (FD-LE) to mitigate the inter-symbol interference (ISI) in the delay-Doppler (DD) domain and a successive interference cancellation (SIC) to eliminate the multi-user interference (MUI). Under the quality of service (QoS) constraints for high-speed users, a joint base station (BS) beamforming and power allocation optimization problem is formulated to maximize the system sum rate and we propose a common beamforming (CBF) optimization for multi-user coordination and a user-specific beamforming (USBF) design for differentiated user services. A low-complexity algorithm based on fractional programming (FP) and semidefinite relaxation (SDR) is proposed for CBF, while a robust optimization approach with successive convex approximation (SCA) and SDR is developed for USBF. Simulation results show that the proposed schemes significantly enhance the system sum rate and the USBF scheme outperforms the CBF scheme in low-correlation channels and high QoS cases, while the CBF method exhibits better robustness in high-density, multipath, and Doppler-rich environments.</div></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":"201 ","pages":"Article 155956"},"PeriodicalIF":3.2,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144772679","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

Guest editorial special issue on selected papers from SMACD 2024 2024年SMACD论文特刊特邀编辑

IF 3.2 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2025-07-28 DOI: 10.1016/j.aeue.2025.155972

Francisco V. Fernández, Günhan Dündar, Fotis Plessas, Alkis Hatzopoulos

引用次数: 0