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Special Cluster on Antennas and Propagation Technologies in Conjunction with Main Topics of iWAT 2024
IF 0.3
IEICE Communications Express Pub Date : 2025-01-30 DOI: 10.23919/comex.2024ATF0001
{"title":"Special Cluster on Antennas and Propagation Technologies in Conjunction with Main Topics of iWAT 2024","authors":"","doi":"10.23919/comex.2024ATF0001","DOIUrl":"https://doi.org/10.23919/comex.2024ATF0001","url":null,"abstract":"The 2024 International Workshop on Antenna Technology (iWAT2024) was held at Tohoku University in Sendai, Japan, from April 15th to 18th, 2024. The workshop aims to provide an international forum for exchanging information on the progress of research and development in antenna technology. It specifically focuses on small antennas and the application of artificial materials to antenna design. Taking this opportunity, a special section has been planned to publish papers in a cluster format, aiming to raise interest among researchers in the fields of small antennas, metamaterials, wireless applications, and related topics.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 2","pages":"38-38"},"PeriodicalIF":0.3,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10858684","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107191","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
Indoor mMTC Group Targets Localization in 5G Networks Based on Parallel Chaotic Stochastic Resonance Processing of Distance Estimation Between Terminals
IF 0.3
IEICE Communications Express Pub Date : 2024-12-13 DOI: 10.23919/comex.2024XBL0142
Zhijun Qin;Tengfei Xie;Chen Xie;Di He
{"title":"Indoor mMTC Group Targets Localization in 5G Networks Based on Parallel Chaotic Stochastic Resonance Processing of Distance Estimation Between Terminals","authors":"Zhijun Qin;Tengfei Xie;Chen Xie;Di He","doi":"10.23919/comex.2024XBL0142","DOIUrl":"https://doi.org/10.23919/comex.2024XBL0142","url":null,"abstract":"In this research, a high-precision positioning method for 5G group communication terminals based on the mMTC scenario is proposed. Group positioning extends the original positioning for a single terminal to positioning for multiple terminals simultaneously, utilizing the interaction information between terminals to optimize the positioning results by using the parallel chaotic stochastic resonance processing technique. On the basis of traditional single target positioning algorithms, the mMTC communication mode is effectively used to increase the positioning information between terminals and improve the average positioning accuracy of each communication terminal in the 5G cluster.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 2","pages":"59-62"},"PeriodicalIF":0.3,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10799929","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107197","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
Explosives Detection using Shadow Features in Radar Images for Walk-Through Security Screening
IF 0.3
IEICE Communications Express Pub Date : 2024-12-13 DOI: 10.23919/comex.2024XBL0172
Shingo Yamanouchi;Masayuki Ariyoshi;Toshiyuki Nomura
{"title":"Explosives Detection using Shadow Features in Radar Images for Walk-Through Security Screening","authors":"Shingo Yamanouchi;Masayuki Ariyoshi;Toshiyuki Nomura","doi":"10.23919/comex.2024XBL0172","DOIUrl":"https://doi.org/10.23919/comex.2024XBL0172","url":null,"abstract":"Radar imaging technologies have been utilized to detect concealed hazardous materials for security screening in public facilities. We have developed a high-throughput walk-through and whole-body security screening system called Invisible Sensing (IVS) based on radar imaging and deep learning. In our previous work, we have demonstrated that the IVS system can detect guns and knives while subject persons walk through the system. This paper presents a newly developed function to detect explosives in radar images on the IVS system. Since most explosives have low reflectivity to microwaves, it is difficult to detect the shape of explosives in radar images. In contrast, the human body is highly reflective and visible in radar images. We propose a novel approach to detect low-reflective explosives in radar images by learning shadow features against the high-reflective human body background. We demonstrate that the proposed detection technique integrated into the IVS system achieved successful explosive detection performance in real time.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 2","pages":"71-74"},"PeriodicalIF":0.3,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10799932","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107200","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
Three-Axis Coil Array for Null-Free Near-Field Tag Reading with UHF RFID
IF 0.3
IEICE Communications Express Pub Date : 2024-12-13 DOI: 10.23919/comex.2024XBL0178
Akihito Noda
{"title":"Three-Axis Coil Array for Null-Free Near-Field Tag Reading with UHF RFID","authors":"Akihito Noda","doi":"10.23919/comex.2024XBL0178","DOIUrl":"https://doi.org/10.23919/comex.2024XBL0178","url":null,"abstract":"Tiny radio-frequency identification (RFID) tags with a 1 mm square scale can be attached to small insects such as ants and used to detect their passage at RFID reader antennas in a laboratory arena. Although the movement paths of ants can be restricted inside a narrow tube, the ants pass through the tube in various postures. A single small coil antenna attached to the tube generates nulls, where the tags become unreadable due to specific tag orientations. This letter proposes a tag reading system with three antennas generating major magnetic field vectors in three orthogonal directions, to eliminate nulls within the tube, regardless of the tag orientation.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 2","pages":"55-58"},"PeriodicalIF":0.3,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10799933","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107196","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
Discrete Wigner-Ville Distribution with Wide Frequency Observation Range
IF 0.3
IEICE Communications Express Pub Date : 2024-12-13 DOI: 10.23919/comex.2024XBL0168
Tomoya Yamaoka;Tadashi Oshima
{"title":"Discrete Wigner-Ville Distribution with Wide Frequency Observation Range","authors":"Tomoya Yamaoka;Tadashi Oshima","doi":"10.23919/comex.2024XBL0168","DOIUrl":"https://doi.org/10.23919/comex.2024XBL0168","url":null,"abstract":"The Wigner-Ville distribution (WVD) is a high-resolution time-frequency analysis method. However, the discrete WVD (DWVD) has the problem of a narrow frequency observation range. This is because the time sampling of the symmetric instantaneous auto-correlation function (SIAF) changes simultaneously in the positive and negative directions. As a result, the sampling period of the SIAF in the case of DWVD is doubled and the frequency observation range is halved. Therefore, we propose a DWVD that does not narrow the frequency observation range. Specifically, when deriving the SIAF, in addition to the conventional sample that varies in both the positive and negative directions, we consider a sample averaged over two samples that vary only in the positive or negative direction. The proposed process allows the DWVD to be performed without halving the frequency observation range. However, this process causes a small aliasing component, which can be reduced by the use of window functions. This study will demonstrate this effect by using the proposed method for chirp waveforms.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 2","pages":"67-70"},"PeriodicalIF":0.3,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10799926","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107199","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
Visible Light Communication Technology in Digital Operating Room: Experiment and Equipment Manufacturing
IF 0.3
IEICE Communications Express Pub Date : 2024-12-13 DOI: 10.23919/comex.2024XBL0181
Xiaofei Wang;Chao Zhang;Jian Song
{"title":"Visible Light Communication Technology in Digital Operating Room: Experiment and Equipment Manufacturing","authors":"Xiaofei Wang;Chao Zhang;Jian Song","doi":"10.23919/comex.2024XBL0181","DOIUrl":"https://doi.org/10.23919/comex.2024XBL0181","url":null,"abstract":"With the technology advances and implementation acceleration of medical digitization, more and more medical devices with radio frequency (RF) wireless communication capabilities are adopted in the hospitals for the conveniences and easily for the deployments. That causes the concerns on electromagnetic interference problem affecting medical safety seriously and should be considered carefully in reality. As an attractive technology, visible light communication (VLC) uses visible light offering illumination and communication at the same time. Compared with the traditional RF communication systems, VLC has significant advantages such as energy saving, easy deployment, no radio interference, electromagnetic compatibility and etc.. In this paper, the experiment utilizing VLC in the digital operating room to reduce electromagnetic interference is presented with implementation details on the test environment and both uplink and downlink hardware design and key parameters to support video/image transmission. The effectiveness of VLC system is verified to deploy in a real digital operating room and support in operation.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 2","pages":"63-66"},"PeriodicalIF":0.3,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10799928","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107202","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
Occupancy Grid Map Estimation Method using Roadside Sensor for Cooperative Automated Driving
IF 0.3
IEICE Communications Express Pub Date : 2024-12-13 DOI: 10.23919/comex.2024XBL0176
Shota Matsushita;Onur Alparslan;Kenya Sato
{"title":"Occupancy Grid Map Estimation Method using Roadside Sensor for Cooperative Automated Driving","authors":"Shota Matsushita;Onur Alparslan;Kenya Sato","doi":"10.23919/comex.2024XBL0176","DOIUrl":"https://doi.org/10.23919/comex.2024XBL0176","url":null,"abstract":"In recent years, cooperative automated driving, which shares information from in-vehicle and roadside sensors via communication technology, has gained attention. To share sensor information, methods using occupancy grid maps (OGMs) have been explored. However, when using roadside sensors to estimate OGMs, which are installed at higher elevations than in-vehicle sensors, the challenge arises of being unable to accurately recognize the road environment due to increased undetected areas. This study proposed a method to estimate OGMs using roadside LiDAR sensors, considering undetected areas. And the proposed method was demonstrated to accurately reflect the road environment in OGMs.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 2","pages":"83-86"},"PeriodicalIF":0.3,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10799924","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107195","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
A Complexity-Reduction Sub-Terahertz Image Sensing Method using Adaptive Signal Processing
IF 0.3
IEICE Communications Express Pub Date : 2024-12-13 DOI: 10.23919/comex.2024XBL0187
Taisei Kurahashi;Eiji Okamoto
{"title":"A Complexity-Reduction Sub-Terahertz Image Sensing Method using Adaptive Signal Processing","authors":"Taisei Kurahashi;Eiji Okamoto","doi":"10.23919/comex.2024XBL0187","DOIUrl":"https://doi.org/10.23919/comex.2024XBL0187","url":null,"abstract":"Terahertz-wave sensing is expected to be used for high-resolution metal detection because of its broadband nature and object transparency. However, when terahertz-band near-field image sensing is conducted using array antennas, the amount of signal processing increases significantly with the resolution. We propose a low-complexity imaging algorithm that changes the sensing resolution adaptively according to the area where an object may exist without compromising the object detection capability. Experimental results using actual measured data show that the proposed method reduces the computational complexity to less than one-third of that of conventional linear interpolation methods without degrading the quality of the sensed image.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 2","pages":"79-82"},"PeriodicalIF":0.3,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10799927","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107201","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
Beam Steering Realization using a Reflective Metasurface for THz Applications
IF 0.3
IEICE Communications Express Pub Date : 2024-12-13 DOI: 10.23919/comex.2024XBL0182
Liang-Yu Ou Yang;Siang-Cyun Liao;Bingzhang Tsai
{"title":"Beam Steering Realization using a Reflective Metasurface for THz Applications","authors":"Liang-Yu Ou Yang;Siang-Cyun Liao;Bingzhang Tsai","doi":"10.23919/comex.2024XBL0182","DOIUrl":"https://doi.org/10.23919/comex.2024XBL0182","url":null,"abstract":"This paper presents a reflective metasurface designed for beam steering at 300 GHz. The metasurface uses an H-shaped structure as its unit cell to achieve desired reflection phases. A supercell, consisting of 16 unit cells, covers a complete reflection phase range of 360 degrees. To achieve a radiation pattern with the main beam directed at 30 degrees from the broadside direction, 28 supercells are fabricated on a grounded GaAs substrate of dimensions 4.4 mm × 4.4 mm. Full-wave simulations are conducted, demonstrating that the proposed metasurface achieves an overall gain of 10 dBi under a horn excitation. In addition, the radiation and transmission performance of the proposed metasurface over a long distance in a complex environment with multipath effects is proven to be effective. These results suggest that such metasurfaces have significant potential in THz applications.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 2","pages":"75-78"},"PeriodicalIF":0.3,"publicationDate":"2024-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10799925","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107203","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
Special Cluster in Conjunction with IEICE General Conference 2024 与IEICE大会2024相结合的特别集群
IF 0.3
IEICE Communications Express Pub Date : 2024-12-02 DOI: 10.23919/comex.2024COF0001
{"title":"Special Cluster in Conjunction with IEICE General Conference 2024","authors":"","doi":"10.23919/comex.2024COF0001","DOIUrl":"https://doi.org/10.23919/comex.2024COF0001","url":null,"abstract":"IEICE Communications Express (ComEX) has continued to issue a special cluster annually in conjunction with the IEICE General Conferences since 2019. This year's special cluster is based on the papers presented at the IEICE General Conference 2024, which was held at the Hiroshima University in March 2024. Since October 1, 2023, all accepted letters in ComEX have been published in IEEE Xplore to improve the visibility of letters.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"13 12","pages":"449-449"},"PeriodicalIF":0.3,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10772345","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142761416","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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