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5G-coded fluid antenna multiple access over block fading channels
IF 0.7 4区 工程技术
Electronics Letters Pub Date : 2025-02-05 DOI: 10.1049/ell2.70166
Hanjiang Hong, Kai-Kit Wong, Kin-Fai Tong, Hao Xu, Haoyang Li
{"title":"5G-coded fluid antenna multiple access over block fading channels","authors":"Hanjiang Hong,&nbsp;Kai-Kit Wong,&nbsp;Kin-Fai Tong,&nbsp;Hao Xu,&nbsp;Haoyang Li","doi":"10.1049/ell2.70166","DOIUrl":"https://doi.org/10.1049/ell2.70166","url":null,"abstract":"<p>Fluid antenna multiple access (FAMA) is a concept capable of massive connectivity on the same physical channel without the need of precoding or interference cancellation, by exploiting a super-high dimensional received signal in the spatial domain from fluid antenna system (FAS). This letter investigates the use of 5G New Radio (NR) Modulation Coding Scheme (MCS) for FAMA systems to improve its connectivity over block fading channels. In particular, an iterative decoding receiver with iterative interference covariance estimation is proposed, designed explicitly for slow fading channels. Extrinsic information transfer (EXIT) chart is used to analyze the performance of the proposed iterative receiver. Both EXIT chart analysis and numerical results indicate that the proposed receiver outperforms the existing approach that uses fixed covariance in block fading channels. Also, the results indicate that coded FAMA can serve 100 user terminals (UTs) at the rate of 0.5 bit/s/Hz under rich scattering.</p>","PeriodicalId":11556,"journal":{"name":"Electronics Letters","volume":"61 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/ell2.70166","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143248424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fast batch gradient descent in quantum neural networks
IF 0.7 4区 工程技术
Electronics Letters Pub Date : 2025-02-05 DOI: 10.1049/ell2.70162
Joo Yong Shim, Joongheon Kim
{"title":"Fast batch gradient descent in quantum neural networks","authors":"Joo Yong Shim,&nbsp;Joongheon Kim","doi":"10.1049/ell2.70162","DOIUrl":"https://doi.org/10.1049/ell2.70162","url":null,"abstract":"<p>A novel batch gradient descent algorithm for parameterized quantum circuits that significantly reduces the time complexity in terms of batch size for training quantum neural networks is proposed. Batch data constructed to quantum random access memory (qRAM) structure is mapped to one circuit that estimates average loss. As the number of circuits decreases, the range to which quantum amplitude estimation can be applied increases, speeding up with a quadratic scale in batch size.</p>","PeriodicalId":11556,"journal":{"name":"Electronics Letters","volume":"61 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/ell2.70162","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143248421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
High importance feature selection and DV-OSR-QSED strategy for open-set recognition
IF 0.7 4区 工程技术
Electronics Letters Pub Date : 2025-02-05 DOI: 10.1049/ell2.70167
Tong Xu
{"title":"High importance feature selection and DV-OSR-QSED strategy for open-set recognition","authors":"Tong Xu","doi":"10.1049/ell2.70167","DOIUrl":"https://doi.org/10.1049/ell2.70167","url":null,"abstract":"<p>A significant challenge in the domain of anti-drone warfare is the identification of enemies or own aircraft through the analysis of data broadcast by drones (e.g. ADS-B). This issue can be conceptualized as an open set recognition (OSR) problem. This paper proposes a DV-OSR-QSED framework for the purpose of data visualization-based OSR (DV-OSR). Phase-based 2D high-importance features are extracted, the DV-OSR framework is designed and mapped to 2D, and the 5th and 95th quantile selection-Euclidean distance (QSED) strategy is proposed. Experiments show that by using the proposed framework, the correct classification rate for known and unknown samples is 96.04% and 95.79%, the recall rate and <i>F</i>1 value are 89.00% and 92.27%, and the AUC is 0.9630.</p>","PeriodicalId":11556,"journal":{"name":"Electronics Letters","volume":"61 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/ell2.70167","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143248423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multiple kernel-enhanced encoder for effective herbarium image segmentation
IF 0.7 4区 工程技术
Electronics Letters Pub Date : 2025-02-04 DOI: 10.1049/ell2.70155
Sanghyuck Lee, Hyeonji Moon, Sangtae Kim, Jaesung Lee
{"title":"Multiple kernel-enhanced encoder for effective herbarium image segmentation","authors":"Sanghyuck Lee,&nbsp;Hyeonji Moon,&nbsp;Sangtae Kim,&nbsp;Jaesung Lee","doi":"10.1049/ell2.70155","DOIUrl":"https://doi.org/10.1049/ell2.70155","url":null,"abstract":"<p>The neural network proposed here specializes in herbarium image segmentation. The encoder of the proposed model contains multiple kernels of different sizes to address the complex structures of plant components, such as tangled roots and stems. By employing multiple kernel sizes, the convolution block enables multiscale learning, which is underexplored in previous approaches. This design effectively extracts and fuses local and global features, enabling both broad and narrow perspectives on complex structures within herbarium images and thereby improves segmentation performance. The experimental results demonstrate that the proposed model outperforms three conventional models. The source code can be accessed at https://github.com/tkdgur658/herbarim_segmentation_network</p>","PeriodicalId":11556,"journal":{"name":"Electronics Letters","volume":"61 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/ell2.70155","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143111895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Deep circadian-informed probability refinement network for pedestrian intent classification in urban complex
IF 0.7 4区 工程技术
Electronics Letters Pub Date : 2025-01-31 DOI: 10.1049/ell2.70159
Ho Chun Wu, Paul Yuen, Esther Hoi Shan Lau, Kevin Hung, Kwok Tai Chui, Andrew Kwok Fai Lui
{"title":"Deep circadian-informed probability refinement network for pedestrian intent classification in urban complex","authors":"Ho Chun Wu,&nbsp;Paul Yuen,&nbsp;Esther Hoi Shan Lau,&nbsp;Kevin Hung,&nbsp;Kwok Tai Chui,&nbsp;Andrew Kwok Fai Lui","doi":"10.1049/ell2.70159","DOIUrl":"https://doi.org/10.1049/ell2.70159","url":null,"abstract":"<p>Urban complexes often feature a mix of commercial, entertainment and recreational space serving a wide range of services. Pedestrian intent classification is hence crucial to identify their different destinations and understanding their needs. Moreover, circadian effects generally influence pedestrian behaviour. This paper proposes a deep circadian-informed probability refinement network for pedestrian intent classification (CIPRNet). It incorporates circadian information using a multiplexer network architecture to refine preliminary classification probabilities generated by a preliminary deep learning-based trajectory classifier. A joint loss function is used to co-optimize both the preliminary baseline trajectory classifier and the CIPRNet. Experimental results using real pedestrian trajectories captured from 3D range sensors at the Osaka Asia and Pacific Trade Centre (ATC) on a sunny day and cloudy day show that the CIPRNet can improve the state-of-the-art prediction of pedestrian paths by long short term memory classifier and trajectory unified transformer by approximately 13% and 10%, respectively. The CIPRNet is also extended to trajectory prediction and it outperformed various state-of-the-art algorithms in terms of average and final displacement error reduction. It may serve as an attractive alternative for pedestrian intent classification for urban complexes.</p>","PeriodicalId":11556,"journal":{"name":"Electronics Letters","volume":"61 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/ell2.70159","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143121463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Insulated gate unipolar diode
IF 0.7 4区 工程技术
Electronics Letters Pub Date : 2025-01-31 DOI: 10.1049/ell2.70154
Iraj Sheikhian
{"title":"Insulated gate unipolar diode","authors":"Iraj Sheikhian","doi":"10.1049/ell2.70154","DOIUrl":"https://doi.org/10.1049/ell2.70154","url":null,"abstract":"<p>Here, for the first time, a gated diode that can be turned on/off by its single insulated gate is introduced. The novel device is a combination of a metal-oxide-semiconductor field-effect transistor (MOSFET) and a diode. It has a simple structure and can be fabricated by the regular complementary metal-oxide-semiconductor (CMOS) technology at low cost. The insulated-gate unipolar diode (IGUD) is simulated by device simulator tools. Simulations show the output curve of the IGUD is not only similar to a regular diode but also can be shifted by the gate. The idea of IGUD has been evaluated by experimental tests. The experimental data are in good agreement with the simulation results. The IGUD can be used as a fast switch in high-current low-voltage applications. Also, it can be used to achieve controlled rectification without synchronisation to the AC input.</p>","PeriodicalId":11556,"journal":{"name":"Electronics Letters","volume":"61 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/ell2.70154","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143121464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An ISAR target motion estimation algorithm based on a differential semblance criterion
IF 0.7 4区 工程技术
Electronics Letters Pub Date : 2025-01-31 DOI: 10.1049/ell2.70147
D. P. Huxley, F. M. Watson, W. R. B. Lionheart
{"title":"An ISAR target motion estimation algorithm based on a differential semblance criterion","authors":"D. P. Huxley,&nbsp;F. M. Watson,&nbsp;W. R. B. Lionheart","doi":"10.1049/ell2.70147","DOIUrl":"https://doi.org/10.1049/ell2.70147","url":null,"abstract":"<p>Inverse Synthetic Aperture Radar (ISAR) is a vital radar imaging technique that leverages the relative motion between the radar and the target to generate high-resolution images. Traditional ISAR methods; however, are highly sensitive to inaccuracies in estimating rotational parameters, roll, pitch, and yaw, leading to image degradation. This article proposes a novel Differential Semblance Optimization (DSO) criterion for imaging dynamically rotating targets in a multistatic ISAR configuration. Unlike the Intensity Criterion (IC), which requires a precise initial parameter range, DSO enables broader exploration of value ranges, offering greater flexibility. Although the experiments focus on yaw rotation, the method is versatile and extendable to other rotational parameters. Tests with varying transmitter and receiver configurations demonstrate that DSO maintains robust performance even with fewer receivers. Comparisons with IC show that DSO produces sharper, more focused images and performs robustly in noisy environments, underscoring its potential for enhancing ISAR imaging in complex and dynamic scenarios.</p>","PeriodicalId":11556,"journal":{"name":"Electronics Letters","volume":"61 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/ell2.70147","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143121462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multi-semantic contrast enhancement for robust insulator defect detection
IF 0.7 4区 工程技术
Electronics Letters Pub Date : 2025-01-31 DOI: 10.1049/ell2.70150
Yue Zhang, Zhiqiang Lin, Kunfeng Wei, Yonghui Xu, Lizhen Cui
{"title":"Multi-semantic contrast enhancement for robust insulator defect detection","authors":"Yue Zhang,&nbsp;Zhiqiang Lin,&nbsp;Kunfeng Wei,&nbsp;Yonghui Xu,&nbsp;Lizhen Cui","doi":"10.1049/ell2.70150","DOIUrl":"https://doi.org/10.1049/ell2.70150","url":null,"abstract":"<p>The effectiveness of deep learning-based methods for insulator defect detection has been proven. However, in practical applications of power transmission lines, the complex and variable backgrounds in insulator images, coupled with the difficulty in labeling insulator defects, pose challenges to improving the robustness of such methods. Existing studies often utilize generative adversarial networks or forcefully combine foreground and background to augment training samples, but they overlook the rich semantic information in complex scenes, leading to distorted generated adversarial samples. To address this challenge, an innovative multi-semantic contrast enhancement method that significantly enhances the robustness of defect detection by deeply integrating high-level semantic knowledge and low-level signal priors is proposed. Moreover, through adversarial training using generated samples with diverse semantics and real samples, the robustness of the method is further improved. Experimental results demonstrate that this method surpasses state-of-the-art models, achieving significant performance on three independent cross-scene datasets.</p>","PeriodicalId":11556,"journal":{"name":"Electronics Letters","volume":"61 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/ell2.70150","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143121465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
DarwinSync: An adaptive time step execution framework for large-scale neuromorphic systems
IF 0.7 4区 工程技术
Electronics Letters Pub Date : 2025-01-30 DOI: 10.1049/ell2.70153
Xiaofei Jin, Zonghua Gu, Yitao Li, Ziyang Kang, Youneng Hu, Huajin Tang, Gang Pan, De Ma
{"title":"DarwinSync: An adaptive time step execution framework for large-scale neuromorphic systems","authors":"Xiaofei Jin,&nbsp;Zonghua Gu,&nbsp;Yitao Li,&nbsp;Ziyang Kang,&nbsp;Youneng Hu,&nbsp;Huajin Tang,&nbsp;Gang Pan,&nbsp;De Ma","doi":"10.1049/ell2.70153","DOIUrl":"https://doi.org/10.1049/ell2.70153","url":null,"abstract":"<p>The time step functions as a crucial temporal unit for simulating neuronal dynamics within spiking neural networks, which play a significant role in neuromorphic computing systems. Efficient management of these time steps is vital to ensure model accuracy while optimizing overall system performance. As system scale increases, variations in hardware across subsystems and their asynchronous operations create challenges in achieving effective time step control. To address this issue, this paper proposes an innovative framework for managing time steps in large-scale neuromorphic systems. This framework allows subsystems to dynamically adjust their time step lengths according to computational loads and to perform look-ahead computations. Such a strategy effectively reduces the overhead related to time step synchronization, enhancing system efficiency. Additionally, the paper introduces a safeguard mechanism to ensure the system's reliability. Experimental results indicate that the proposed framework sustains the correct long-term operation of the system and improves model execution performance by 8.88% to 27.15% when compared to existing methods.</p>","PeriodicalId":11556,"journal":{"name":"Electronics Letters","volume":"61 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/ell2.70153","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143121050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A 6-b 875-MS/s SAR ADC with charge-pump based pipelined background metastability calibration
IF 0.7 4区 工程技术
Electronics Letters Pub Date : 2025-01-29 DOI: 10.1049/ell2.70148
Yunkuk Park, Se-Ung Park, Jung-Hoon Chun
{"title":"A 6-b 875-MS/s SAR ADC with charge-pump based pipelined background metastability calibration","authors":"Yunkuk Park,&nbsp;Se-Ung Park,&nbsp;Jung-Hoon Chun","doi":"10.1049/ell2.70148","DOIUrl":"https://doi.org/10.1049/ell2.70148","url":null,"abstract":"<p>Metastability in successive-approximation register analogue-to-digital converters (ADCs) degrades the ADC's signal-to-noise and distortion ratio and causes error propagation through the digital equalizers of ADC-based receivers. To mitigate these issues, a charge-pump-based successive-approximation register metastability calibration method is proposed. This approach operates independently of a fixed voltage or time reference. The calibration process is executed in the background with pipelining, requiring minimal additional power. Comprehensive testing shows that the proposed calibration consistently enhances ADC SNDR and reduces the code error rate across a wide range of sampling rates.</p>","PeriodicalId":11556,"journal":{"name":"Electronics Letters","volume":"61 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/ell2.70148","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143120584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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