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IEICE Communications Express最新文献

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Capacitive Wireless Power Transfer System with a 3D-Functional Coupler for Maintenance-Free Industrial Robots 用于免维护工业机器人的带 3D 功能耦合器的电容式无线电力传输系统
IF 0.3
IEICE Communications Express Pub Date : 2024-04-08 DOI: 10.23919/comex.2024XBL0037
Yasumasa Naka;Akihiko Ishiwata;Masahiro Shibata;Takuya Kondo;Masaya Tamura
{"title":"Capacitive Wireless Power Transfer System with a 3D-Functional Coupler for Maintenance-Free Industrial Robots","authors":"Yasumasa Naka;Akihiko Ishiwata;Masahiro Shibata;Takuya Kondo;Masaya Tamura","doi":"10.23919/comex.2024XBL0037","DOIUrl":"https://doi.org/10.23919/comex.2024XBL0037","url":null,"abstract":"This paper presents a capacitive wireless power transfer system that employs a three-dimensional (3D)-functional coupler for obtaining maintenance-free industrial robots. To enhance the vital coupling coefficient of the coupler within a confined space, such as a rotary joint, we fabricated a 3D capacitive coupler. Additionally, by employing polytetrafluoroethylene (PTFE) resin with a high Q factor for electrode fixation, a theoretical maximum efficiency of 99.3% was achieved. Finally, we designed a system that successfully produced a transmission of 5.76 W with a total DC-DC efficiency of 73.0% at 13.56 MHz and an arm chuck operations utilizing both power and pneumatic pressure.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"13 6","pages":"214-217"},"PeriodicalIF":0.3,"publicationDate":"2024-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10494946","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141245277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fairness Improvement Method Using Explicit Congestion Notification for QUIC 利用 QUIC 的显式拥塞通知改善公平性的方法
IF 0.3
IEICE Communications Express Pub Date : 2024-04-08 DOI: 10.23919/comex.2024XBL0014
Nobuhiro Uchida;Daiki Nobayashi;Dirceu Cavendish;Takeshi Ikenaga
{"title":"Fairness Improvement Method Using Explicit Congestion Notification for QUIC","authors":"Nobuhiro Uchida;Daiki Nobayashi;Dirceu Cavendish;Takeshi Ikenaga","doi":"10.23919/comex.2024XBL0014","DOIUrl":"https://doi.org/10.23919/comex.2024XBL0014","url":null,"abstract":"QUIC is a transport protocol that adds congestion control, retransmission control, and TLS to UDP. QUIC can use the same congestion control algorithms as TCP. In previous work, we have shown that communication performance becomes unfair concerning the buffer size of the shared bottleneck link of two flows, one using CUBIC and the other BBR congestion control algorithms within QUIC. In this study, we improve the communication fairness performance at different bottleneck link buffer sizes by using Round Trip Time (RTT) and Explicit Congestion Notification (ECN) to regulate congestion control aggressiveness when CUBIC and BBR compete within QUIC through actual experiments.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"13 6","pages":"222-226"},"PeriodicalIF":0.3,"publicationDate":"2024-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10494945","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141245045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
DOA Estimation by Virtual-ESPRIT Algorithm Using Structured Least Squares Method 使用结构最小二乘法的虚拟 ESPRIT 算法进行 DOA 估算
IF 0.3
IEICE Communications Express Pub Date : 2024-04-08 DOI: 10.23919/comex.2024TCL0015
Kenta Noda;Nobuyoshi Kikuma;Kunio Sakakibara;Yoshiki Sugimoto
{"title":"DOA Estimation by Virtual-ESPRIT Algorithm Using Structured Least Squares Method","authors":"Kenta Noda;Nobuyoshi Kikuma;Kunio Sakakibara;Yoshiki Sugimoto","doi":"10.23919/comex.2024TCL0015","DOIUrl":"https://doi.org/10.23919/comex.2024TCL0015","url":null,"abstract":"Virtual-ESPRIT Algorithm (VESPA), which is a direction-of-arrival (DOA) estimation method using higher-order statistics (fourth-order cumulants), is said to be significant for DOAs estimation of non-Gaussian signals. The authors propose SLS-VESPA, which is VESPA with the SLS (Structured Least Squares) method. Computer simulations show improved characteristics of the SLS-VESPA compared to the conventional TLS (Total Least Squares)-VESPA.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"13 8","pages":"307-310"},"PeriodicalIF":0.3,"publicationDate":"2024-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10494922","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141973469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On Signal Detection Parameters for Energy Detection Based Carrier Sense in LPWANs 论 LPWAN 中基于能量检测的载波检测的信号检测参数
IF 0.3
IEICE Communications Express Pub Date : 2024-04-08 DOI: 10.23919/comex.2024XBL0034
Shusuke Narieda;Takeo Fujii
{"title":"On Signal Detection Parameters for Energy Detection Based Carrier Sense in LPWANs","authors":"Shusuke Narieda;Takeo Fujii","doi":"10.23919/comex.2024XBL0034","DOIUrl":"https://doi.org/10.23919/comex.2024XBL0034","url":null,"abstract":"This study investigates the characteristics of signal detection parameters, such as target signal detection probability and false alarm probability of an energy detection based carrier sense, which can effectively avoid interferences in the same frequency band, in low power wide area networks (LPWANs). The aforementioned target probabilities strongly affect the characteristics of energy detection and its application, and revealing the characteristics that enhance the performance of energy detection based carrier sense is important. Two types of numerical example based analysis are presented from the viewpoints of signal detection and wireless networks. The analytical results show the presence of an optimal target false alarm probability.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"13 6","pages":"218-221"},"PeriodicalIF":0.3,"publicationDate":"2024-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10494933","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141245108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modulation Level Adaptive Stochastic Resonance Receiver with Low-Resolution ADCs for Multilevel Amplitude Modulated Signals 调制电平自适应随机共振接收器与低分辨率模数转换器，适用于多级调幅信号
IF 0.3
IEICE Communications Express Pub Date : 2024-04-08 DOI: 10.23919/comex.2024XBL0027
Yuta Tomida;Hiroyuki Hatano;Kosuke Sanada;Kazuo Mori
{"title":"Modulation Level Adaptive Stochastic Resonance Receiver with Low-Resolution ADCs for Multilevel Amplitude Modulated Signals","authors":"Yuta Tomida;Hiroyuki Hatano;Kosuke Sanada;Kazuo Mori","doi":"10.23919/comex.2024XBL0027","DOIUrl":"https://doi.org/10.23919/comex.2024XBL0027","url":null,"abstract":"Utilizing an analog to digital converter (ADC) with low-resolution is preferred in terms of high sampling rate, low energy consumption and low implementation cost. Against these advantages, utilizing low-resolution ADCs would lead to degrade the signal detection performance. This paper focuses on addressing this issue by introducing a novel receiver that incorporates a new stochastic resonance (SR) processing method, which adaptively adjusts the intentional noise base on the modulation level of the signal, for the detection of multilevel amplitude modulated signals. Through computer simulation, we confirmed the further improvement by applying the proposed adaptive SR. Moreover, we observed that the proposed receiver is more resistant to channel noise.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"13 6","pages":"202-205"},"PeriodicalIF":0.3,"publicationDate":"2024-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10494930","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141245281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Wideband and Miniaturization of Antenna Composed of Metal Case with a Slot and Inner Folded Dipole Antenna 带槽金属外壳与内折叠偶极子天线组成的天线的宽带化与小型化
IF 0.3
IEICE Communications Express Pub Date : 2024-04-08 DOI: 10.23919/comex.2024SPL0018
Hiroshi Hashiguchi;Tomokazu Mizutani;Naobumi Michishita;Hisashi Morishita;Mari Takeda;Atsushi Yamamoto;Kazuhiro Matsumoto;Tetsuya Hishikawa
{"title":"Wideband and Miniaturization of Antenna Composed of Metal Case with a Slot and Inner Folded Dipole Antenna","authors":"Hiroshi Hashiguchi;Tomokazu Mizutani;Naobumi Michishita;Hisashi Morishita;Mari Takeda;Atsushi Yamamoto;Kazuhiro Matsumoto;Tetsuya Hishikawa","doi":"10.23919/comex.2024SPL0018","DOIUrl":"https://doi.org/10.23919/comex.2024SPL0018","url":null,"abstract":"This paper presents a antenna composed of metal case with a slot and inner folded dipole antenna. The proposed antenna structure simultaneously achieve the miniaturization of the metal case and the wide bandwidth. The impedance bandwidth of 15.9 % with the size of \u0000<tex>$0.35lambda_{0}times 0.35lambda_{0}times 0.03lambda_{0} (lambda_{0}$</tex>\u0000 is the wavelength of low frequency) can be realized by the proposed structure. The proposed structure is validated by the comparison of the simulation and measurement result.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"13 6","pages":"195-197"},"PeriodicalIF":0.3,"publicationDate":"2024-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10494934","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141245276","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Square Rod Antenna Covered by Mantle Cloak with Rejection Band at Lower Frequency Side of Operating Frequency 方杆天线由天线罩覆盖，在工作频率的低频侧有抑制带
IF 0.3
IEICE Communications Express Pub Date : 2024-04-08 DOI: 10.23919/comex.2024SPL0017
Shuhei Ozawa;Takumi Nishime;Hiroshi Hashiguchi;Naobumi Michishita;Kiyoshi Sakimoto;Teruki Miyazaki;Masato Tadokoro
{"title":"Square Rod Antenna Covered by Mantle Cloak with Rejection Band at Lower Frequency Side of Operating Frequency","authors":"Shuhei Ozawa;Takumi Nishime;Hiroshi Hashiguchi;Naobumi Michishita;Kiyoshi Sakimoto;Teruki Miyazaki;Masato Tadokoro","doi":"10.23919/comex.2024SPL0017","DOIUrl":"https://doi.org/10.23919/comex.2024SPL0017","url":null,"abstract":"Mutual coupling reduction is required to miniaturize wireless devices in many applications. The mantle cloak technique has been studied to reduce mutual coupling. This paper proposes a square rod mantle cloak antenna with a low-frequency rejection band. The rejection band is 720 MHz and the operation band is 750 MHz. The proposed antenna structure contains a copper rod-covered dielectric substrate with strip conductors at the center of each face. The proposed antenna was validated by comparing the simulation and measurement results.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"13 6","pages":"190-194"},"PeriodicalIF":0.3,"publicationDate":"2024-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10494928","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141245139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Method for Network-Anomaly Detection and Failure-Scale Estimation 网络异常现象检测和故障规模估算方法
IF 0.3
IEICE Communications Express Pub Date : 2024-04-08 DOI: 10.23919/comex.2024XBL0028
Naoya Ogawa;Ryoichi Kawahara
{"title":"Method for Network-Anomaly Detection and Failure-Scale Estimation","authors":"Naoya Ogawa;Ryoichi Kawahara","doi":"10.23919/comex.2024XBL0028","DOIUrl":"https://doi.org/10.23919/comex.2024XBL0028","url":null,"abstract":"In this study, we propose a novel method for network-anomaly detection and failure-scale estimation using autoencoders, which are a type of neural network. The proposed method first divides the network into several groups. Subsequently, anomalies are detected using an autoencoder for each intergroup traffic, and the failure-scale is estimated from the number of autoencoders that have detected anomalies. We experimentally investigated anomaly detection during communication through a virtual network built using the network emulator Mininet and confirmed that the proposed method can successfully detect anomalies and estimate the failure scale.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"13 6","pages":"206-209"},"PeriodicalIF":0.3,"publicationDate":"2024-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10494939","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141245282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Proposal on Rain Attenuation Prediction Method Using Convolutional Neural Network 关于利用卷积神经网络进行雨衰减预测方法的建议
IF 0.3
IEICE Communications Express Pub Date : 2024-03-12 DOI: 10.23919/comex.2024SPL0015
Yuji Komatsuya;Tetsuro Imai;Miyuki Hirose
{"title":"Proposal on Rain Attenuation Prediction Method Using Convolutional Neural Network","authors":"Yuji Komatsuya;Tetsuro Imai;Miyuki Hirose","doi":"10.23919/comex.2024SPL0015","DOIUrl":"https://doi.org/10.23919/comex.2024SPL0015","url":null,"abstract":"Recently, the practical application of HAPS (High Altitude Platform Station) as the next-generation communication platform is studied actively. HAPS employs adaptive rain attenuation countermeasure techniques such as site diversity methods, therefore it is ideal to predict rain attenuation on the path in real time. We proposed real-time rain attenuation prediction method by convolutional neural network that inputs image of rainfall rate and path distance. Result showed that prediction accuracy of our proposed method is better than a method using conventional formulas.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"13 6","pages":"181-184"},"PeriodicalIF":0.3,"publicationDate":"2024-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10471242","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141245140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Machine Learning-Based Area Estimation Using Data Measured Under Walking Conditions 利用步行条件下的测量数据进行基于机器学习的面积估算
IF 0.3
IEICE Communications Express Pub Date : 2024-03-12 DOI: 10.23919/comex.2024SPL0012
Shota Nakayama;Satoru Aikawa;Shinichiro Yamamoto
{"title":"Machine Learning-Based Area Estimation Using Data Measured Under Walking Conditions","authors":"Shota Nakayama;Satoru Aikawa;Shinichiro Yamamoto","doi":"10.23919/comex.2024SPL0012","DOIUrl":"https://doi.org/10.23919/comex.2024SPL0012","url":null,"abstract":"This study examines the accuracy and measurement costs associated with room-level indoor-area estimation using a wireless LAN. Utilizing fingerprinting, a method that compares user-measured access point (AP) information with pre-existing AP data from service providers, this study introduces a cost-effective approach. Our proposed machine learning (ML)-based method leverages data collected by users while traversing different locations within an area, thereby significantly reducing the measurement time. Furthermore, this study contrasts the effectiveness of convolutional neural networks (CNN) and support vector machines (SVM) in area estimation using this novel measurement technique. Both CNN and SVM demonstrated comparable accuracy, with SVM exhibiting a shorter processing time.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"13 6","pages":"172-175"},"PeriodicalIF":0.3,"publicationDate":"2024-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10471244","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141245279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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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