Aeu-International Journal of Electronics and Communications最新文献_第3页

Resource optimization for cooperative SWIPT-NOMA systems with imperfect SIC 具有不完善 SIC 的 SWIPT-NOMA 合作系统的资源优化

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2024-09-06 DOI: 10.1016/j.aeue.2024.155517

引用次数: 0

Encoding reality with semantic interpretation in metaverse interactions 在元宇宙互动中用语义解释对现实进行编码

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2024-09-05 DOI: 10.1016/j.aeue.2024.155512

{"title":"Encoding reality with semantic interpretation in metaverse interactions","authors":"","doi":"10.1016/j.aeue.2024.155512","DOIUrl":"10.1016/j.aeue.2024.155512","url":null,"abstract":"<div><p>In the rapidly evolving landscape of the metaverse, efficiently managing and processing vast amounts of data is a critical challenge. This paper introduces a novel data management framework designed specifically for the metaverse, addressing the complexities of handling extensive data in its increasingly intricate and expansive digital environments. Leveraging advancements in wireless communication technologies, our framework optimizes resource allocation while managing massive data loads. We propose an innovative approach that integrates change grading and semantic encoding techniques, utilizing edge computing to process data locally and reduce server load. By processing data locally and minimizing server load, our approach stores static scenes on local devices and detects significant changes by comparing them with newly captured data. This selective transmission of only new or altered information based on change grades dramatically reduces bandwidth requirements and boosts network efficiency. This paper details the technical aspects of our methodology, showcases experimental results that demonstrate its effectiveness, and discusses its implications for the future scalability and sustainability of metaverse architectures. Our framework aims to refine the real-time digital representation of the metaverse, ensuring its operational efficiency and continuous accessibility as it evolves.</p></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142151046","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

Enhancing 5G performance: A standalone system platform with customizable features 增强 5G 性能：具有可定制功能的独立系统平台

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2024-09-05 DOI: 10.1016/j.aeue.2024.155515

{"title":"Enhancing 5G performance: A standalone system platform with customizable features","authors":"","doi":"10.1016/j.aeue.2024.155515","DOIUrl":"10.1016/j.aeue.2024.155515","url":null,"abstract":"<div><p>The fifth generation (5G) mobile networks have introduced new features compared to the previous generation that resulted in increased overall throughput and decreased latency. At the same time, the complexity of 5G-based standards and deployment scenarios is increasing. This further drives the development of software for testing new ideas and different 5G and Beyond-5G use cases in academia and industry. In this paper we propose a flexible end-to-end (E2E) standalone 5G system platform based on the Open Air Interface software, which is fully reprogrammable and customizable. We created a set of Linux shell scripts, which improves the ease of use of the software, speeding up the process of implementing different connectivity scenarios. We present the main capabilities of the platform and the achievable throughput and latency for different bandwidth parts. Setting the DL/UL Transmission periodicity to 2 ms, we measured a latency of 6.78 ms for the mean RTT value, which is acceptable for many applications requiring low latency.</p></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1434841124004011/pdfft?md5=e5a8aca5bbf548cea933d333d4b3b146&pid=1-s2.0-S1434841124004011-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142161865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis and design of symmetrical coupled Doherty power amplifier with extended high-efficiency range 具有扩展高效率范围的对称耦合 Doherty 功率放大器的分析与设计

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2024-09-05 DOI: 10.1016/j.aeue.2024.155509

{"title":"Analysis and design of symmetrical coupled Doherty power amplifier with extended high-efficiency range","authors":"","doi":"10.1016/j.aeue.2024.155509","DOIUrl":"10.1016/j.aeue.2024.155509","url":null,"abstract":"<div><p>This paper presents a novel Doherty power amplifier (DPA) structure that employs two equal-cell transistors with an extended high-efficiency range. It is illustrated that the DPA high-efficiency range can be extended by employing a novel coupler-based network through introducing different impedance at the isolation port, which can improve the back-off range. The corresponding theoretical architecture of the proposed coupled DPA is constructed with design parameters. The load modulation effect with different circuit parameters are also analyzed, and DPA performance in different back-off range can be obtained. To validate the proposed architecture, a symmetrical coupled DPA with a high-efficiency range of around 9 dB is designed at 2 GHz. Under the continuous-wave(CW) signal, the fabricated DPA achieves saturated output power of 44.2 dBm and saturated drain efficiency (DE) of 65%. At 8.5 dB back-off, DE of 51.2% can be obtained with a gain of 14 dB. When driven by a 20 MHz Long Term Evolution (LTE) signal with 8 dB peak to average power ratio (PAPR), the measured adjacent channel power ratio (ACPR) keeps better than −20 dBc without linearization. The measurement results well conform to the theoretical analysis and simulation results.</p></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142151047","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

Broadband equal-cell Doherty power amplifier with extended back-off range based on asymmetrical voltage and nonlinear current profiles 基于非对称电压和非线性电流曲线的宽带等容 Doherty 功率放大器，具有更宽的关断范围

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2024-09-05 DOI: 10.1016/j.aeue.2024.155511

{"title":"Broadband equal-cell Doherty power amplifier with extended back-off range based on asymmetrical voltage and nonlinear current profiles","authors":"","doi":"10.1016/j.aeue.2024.155511","DOIUrl":"10.1016/j.aeue.2024.155511","url":null,"abstract":"<div><p>This paper proposes a generalized design methodology for extending the bandwidth and output back-off range of an equal-cell Doherty power amplifier (EC-DPA). The parameters of the EC-DPA combiner are derived based on pre-defined asymmetrical voltage and nonlinear current profiles. It is illustrated that the design parameters of the EC-DPA can be expressed as a function of the combining load. Then, the combining load can be optimized to extend the bandwidth of the proposed EC-DPA. As a validation, an 1.4–2.1 GHz EC-DPA with extended output back-off range is implemented in this paper. Under a continuous-wave (CW) signal excitation, the fabricated EC-DPA achieves a maximum output power of 42.6–43.8 dBm, a saturation drain efficiency (DE) of 50.2%–70.2% and a 10 dB back-off DE of 45.2%–53.7% over 1.4–2.1 GHz. Moreover, under the excitation of a 20 MHz modulated signal with a peak-to-average power ratio (PAPR) of 8.0 dB, the measured adjacent channel leakage ratios (ACLRs) of the fabricated EC-DPA changes from −36.2 dBc to −25.5 dBc at the lower band and from −34.6 to −23.8 dBc at the upper band over 1.4–2.1 GHz when the average output power is 35.0 dBm.</p></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142151045","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

Dynamics of a two-neuron hopfield neural network: Memristive synapse and autapses and impact of fractional order 双神经元跳场神经网络的动力学：膜突触和自突触以及分数阶的影响

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2024-09-02 DOI: 10.1016/j.aeue.2024.155506

引用次数: 0

Highly sensitive dual-functional all-dielectric biosensor for hemoglobin and cancer detection 用于检测血红蛋白和癌症的高灵敏度双功能全介电生物传感器

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2024-09-02 DOI: 10.1016/j.aeue.2024.155504

{"title":"Highly sensitive dual-functional all-dielectric biosensor for hemoglobin and cancer detection","authors":"","doi":"10.1016/j.aeue.2024.155504","DOIUrl":"10.1016/j.aeue.2024.155504","url":null,"abstract":"<div><p>This paper is the first demonstration of a dual-functional metasurface (DFM) based on all-dielectric materials for biosensing applications. The proposed biosensor possesses a unique capability to switch between polarization conversion and absorber functionalities owing to the phase changing properties of VO<sub>2</sub>. Accordingly, the sensor works in two modes: a highly sensitive reflective cross-polarization converter mode (4.38 - 5.08 THz) and an absorber mode (4.36 - 5.96 THz), both of which hold significant promise for the detection of hemoglobin and cancer cells, respectively. When VO<sub>2</sub> is in the insulating state, the reflective cross-polarization converter function of this biosensor exhibits exceptional sensitivity of 3.08 THz/RIU for hemoglobin detection. This is the highest sensitivity among the existing THz based biosensors. Likewise, the same biosensor transforms into an absorber when VO<sub>2</sub> is in the conducting state, offering an impressive sensitivity of 2.93 THz/RIU for detection of cancerous cells. The all-dielectric based DFM biosensor also provides a high degree of angular stability, providing stable response for incident angles of up to 60° for both its polarization converter and absorber functions.</p></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142151044","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

Intelligent resource allocation in hybrid RF/LiFi networks via deep deterministic policy gradient based DRL mechanism 通过基于深度确定性策略梯度的 DRL 机制实现射频/WiFi 混合网络中的智能资源分配

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2024-08-31 DOI: 10.1016/j.aeue.2024.155499

{"title":"Intelligent resource allocation in hybrid RF/LiFi networks via deep deterministic policy gradient based DRL mechanism","authors":"","doi":"10.1016/j.aeue.2024.155499","DOIUrl":"10.1016/j.aeue.2024.155499","url":null,"abstract":"<div><p>A hybrid radio frequency (RF) and light fidelity (LiFi) network combines the strengths of RF and LiFi technologies. RF offers broad coverage, while LiFi provides high data rates. As these technologies operate on non-interfering spectra, they can co-exist without interfering with each other. This setup not only boosts data rate but also makes the network more reliable, especially when physical obstacles might block signals. However, resource management in hybrid RF/LiFi networks is challenging because of the dynamic environment and the different characteristics of the two technologies. Efficient resource allocation maximizes the data rate in these networks. In this paper, we introduce a model-free deep reinforcement learning (DRL) approach to solve the resource allocation problem in hybrid RF/LiFi networks. Our DRL model is designed to handle real-world conditions, considering factors like blockages and user mobility. Unlike traditional methods that need extensive modeling and assumptions, our approach learns directly from interacting with the environment, making it highly adaptable and robust. Through simulations, it is observed that our method improves resource utilization and overall network performance, achieving a 62.8% increase in sum rate and a 42.8% improvement in optimal transmit power compared to conventional methods.</p></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142151048","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 99.99% current efficiency fast transient response capacitor-less LDO with feedforward compensation technique based on small-signal gain stage 基于小信号增益级的前馈补偿技术的 99.99% 电流效率快速瞬态响应无电容 LDO

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2024-08-28 DOI: 10.1016/j.aeue.2024.155501

{"title":"A 99.99% current efficiency fast transient response capacitor-less LDO with feedforward compensation technique based on small-signal gain stage","authors":"","doi":"10.1016/j.aeue.2024.155501","DOIUrl":"10.1016/j.aeue.2024.155501","url":null,"abstract":"<div><p>An ultra-low power capacitor-less LDO with feedforward compensation technique based on the small-signal gain stage and composite transient enhancement structure is proposed. The feedforward compensation technique based on the small-signal gain stage reaches a low frequency zero ,by utilizing the compensating effect of the zero to relieve the adverse effects of the pole, thereby enhancing the stability and performance of the circuit. Furthermore, the small gain stage can adjust the quiescent current consumption,contributing to a significant reduction in system energy consumption. The proposed composite transient enhancement structure can reduce the transition time of the circuit, adjust the gain of the circuit under different operating conditions to achieve precise gain control and improve the transient performance of the system. The proposed LDO is designed using SMIC 0.18um CMOS process. The simulation results show the total quiescent current is 0.94<span><math><mrow><mi>u</mi><mi>A</mi></mrow></math></span> and the current efficiency is up to 99.99%. The extremely low FoM value of 0.04 represents a good transient performance. Synthesizing the comparison of various parameters, the superiority of this design can be clearly concluded.</p></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142097588","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

Augmented correlation matrix reconstruction for direction of arrival estimation using dual-spread array 利用双展布阵列进行到达方向估计的增强相关矩阵重构

IF 3 3区计算机科学

Aeu-International Journal of Electronics and Communications Pub Date : 2024-08-28 DOI: 10.1016/j.aeue.2024.155497

{"title":"Augmented correlation matrix reconstruction for direction of arrival estimation using dual-spread array","authors":"","doi":"10.1016/j.aeue.2024.155497","DOIUrl":"10.1016/j.aeue.2024.155497","url":null,"abstract":"<div><p>Due to the large degrees of freedom (DOF) by generating difference coarray, nonuniform arrays have great potential in direction of arrival (DOA) estimation. However, some existing nonuniform arrays (e.g., (sparse) nested arrays) still have comparatively strong mutual coupling in physical array domain, whereas the others (e.g., coprime arrays) have holes or only used part available in difference coarray domain, for the performance loss of DOA estimation. To address these issues, we propose two kinds of dual-spread arrays which achieve more and continuous DOF by exploiting correlation matrix reconstruction, rather than the generation of difference coarray. All inter-antenna spacings of the proposed arrays are larger than half-wavelength, resulting in extended aperture and reduced mutual coupling. An ESPRIT-based estimation method is further provided for unique DOA estimation with high-accuracy and low-complexity. The analyses of mutual coupling and computational complexity are provided in detailed. The theoretical analyses and simulation results show the superiority of the proposed arrays and method over the existing techniques.</p></div>","PeriodicalId":50844,"journal":{"name":"Aeu-International Journal of Electronics and Communications","volume":null,"pages":null},"PeriodicalIF":3.0,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142088377","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