发布求助
文献互助 智能选刊 最新文献

IEICE Communications Express最新文献

筛选
英文 中文
Experimental Evaluation of the Impact of Physical Space Information on Wireless Link Quality Estimation
IF 0.3
IEICE Communications Express Pub Date : 2025-02-25 DOI: 10.23919/comex.2025XBL0012
Kahoko Takahashi;Hisashi Nagata;Riichi Kudo;Takahiro Yamazaki;Takayuki Yamada;Takafumi Fujita
{"title":"Experimental Evaluation of the Impact of Physical Space Information on Wireless Link Quality Estimation","authors":"Kahoko Takahashi;Hisashi Nagata;Riichi Kudo;Takahiro Yamazaki;Takayuki Yamada;Takafumi Fujita","doi":"10.23919/comex.2025XBL0012","DOIUrl":"https://doi.org/10.23919/comex.2025XBL0012","url":null,"abstract":"Predicting wireless link quality (LQ) is a promising approach to enhancing Quality of Experience (QoE). This paper examines the impact of physical space on LQ; it uses machine learning to predict RSSI and throughput from physical space information. Experiments show that the position/orientation of user equipment (UE) are crucial, with orientation affecting RSSI, and velocity significantly impacting throughput. It is revealed that these LQ parameters have different spatial factor dependencies. An experiment is conducted in a static indoor environment with clear line of sight to simplify the problem. We focus on deriving LQ from current physical space information rather than forecasting future quality.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 4","pages":"163-166"},"PeriodicalIF":0.3,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10904088","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143808981","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
Pre-Equalized MIMO Transmission Over Analog RoF Downlink in the Pres-Ence of Gain Imbalance
IF 0.3
IEICE Communications Express Pub Date : 2025-02-25 DOI: 10.23919/comex.2024XBL0207
Hiroto Yorioka;Takeshi Higashino;Minoru Okada
{"title":"Pre-Equalized MIMO Transmission Over Analog RoF Downlink in the Pres-Ence of Gain Imbalance","authors":"Hiroto Yorioka;Takeshi Higashino;Minoru Okada","doi":"10.23919/comex.2024XBL0207","DOIUrl":"https://doi.org/10.23919/comex.2024XBL0207","url":null,"abstract":"In this article, we propose a pre-equalization method in a wired-wireless multiple-input and multiple-output (MIMO) transmission over an analog radio-on-fiber (A-RoF) network. The MIMO transmission based on A-RoF suffers from un-flat and unbalanced response in the wired part, re-sulting in decreased channel capacity. A partial pre-equalization technique for wired part is compared to the one for the joint channels of wired-and-wireless by using 2 x 2 transmission of orthogonal frequency division multiplexing (OFDM) in a 5-GHz band testbed.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 4","pages":"139-142"},"PeriodicalIF":0.3,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10904081","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143808854","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 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
An Intelligent Antenna Classification Method Using Mamdani Fuzzy Inference System
IF 0.3
IEICE Communications Express Pub Date : 2025-01-28 DOI: 10.23919/comex.2024XBL0195
Jitu Prakash Dhar;Eisuke Nishiyama;Ichihiko Toyoda
{"title":"An Intelligent Antenna Classification Method Using Mamdani Fuzzy Inference System","authors":"Jitu Prakash Dhar;Eisuke Nishiyama;Ichihiko Toyoda","doi":"10.23919/comex.2024XBL0195","DOIUrl":"https://doi.org/10.23919/comex.2024XBL0195","url":null,"abstract":"Proper antenna classification is required for complex systems including specific application and performance parameters such as resonance frequency, gain, and reflection coefficient because conventional mathematical decision-making models are not well-suited for evaluating these systems. This study proposes an antenna classification method based on Mamdani Fuzzy Inference System (FIS) to determine the appropriate antenna type for those requirements. The performance parameters of five types of antennas are evaluated to construct the configuration of the FIS. The FIS responses for unseen requirements verify the model's performance showing its classification capability for new data.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 3","pages":"111-114"},"PeriodicalIF":0.3,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10856830","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143800828","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
Evaluation of a Pseudonym Change Scheme using LSH for Location Privacy in V2X Communication 针对 V2X 通信中的位置隐私，评估使用 LSH 的假名变更方案
IF 0.3
IEICE Communications Express Pub Date : 2025-01-28 DOI: 10.23919/comex.2024XBL0184
Yuki Higashida;Kenya Sato
{"title":"Evaluation of a Pseudonym Change Scheme using LSH for Location Privacy in V2X Communication","authors":"Yuki Higashida;Kenya Sato","doi":"10.23919/comex.2024XBL0184","DOIUrl":"https://doi.org/10.23919/comex.2024XBL0184","url":null,"abstract":"In Vehicle-to-Everything (V2X) communication, vehicles transmit their information to surrounding vehicles and infrastructures for traffic safety and efficiency. However, vehicle anonymity in communications is important because location privacy is threatened when communications are eavesdropped and traced by malicious attackers. The method of periodically changing pseudonyms instead of using actual identification has been considered to provide anonymity. However, anonymity is significantly reduced when the number of vehicles changing pseudonyms simultaneously is insufficient, or when the vehicle trajectory is easily predictable. In this paper, we propose a cooperative pseudonym change scheme among vehicles with similar vehicle information extracted using Locality Sensitive Hash-ing (LSH), aiming to achieve higher vehicle anonymity. We analyze the anonymity of the proposed scheme in our mathematical model under lim-ited circumstances and evaluate it in comparison with existing pseudonym change schemes.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 3","pages":"115-118"},"PeriodicalIF":0.3,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10856831","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143800959","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 High-Performance Reversible Data Hiding Scheme for Audio Streams Base on Code Division Multiplexing
IF 0.3
IEICE Communications Express Pub Date : 2025-01-28 DOI: 10.23919/comex.2024XBL0191
Ruihe Ma;Jian Xu
{"title":"A High-Performance Reversible Data Hiding Scheme for Audio Streams Base on Code Division Multiplexing","authors":"Ruihe Ma;Jian Xu","doi":"10.23919/comex.2024XBL0191","DOIUrl":"https://doi.org/10.23919/comex.2024XBL0191","url":null,"abstract":"The importance of privacy data protection has become increasingly prominent in the communication system. This paper presented a code division multiplexing(CDM)-based high-performance reversible data hid-ing(RDH) scheme for audio streams. In the scheme, plenty of private data are embedded into the audio stream through orthogonal spreading vectors without interfering with each other. Consequently, both private data and the original audio stream can be completely retrieved at the receiver side. At the same time, according to the orthogonality of spreading vectors, private data can be repeatedly embedded within an audio stream, thereby enhancing the capacity of data embedding to a great extent. As the mutual cancellation of most elements accrues during multiple-level data embedding, high percep-tual quality for audio streams is obtained even with a large data-embedding payload. Extensive experimental results clearly show that the CDM-based audio RDH algorithm surpasses other state-of-the-art approaches in terms of data-embedding performance.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 3","pages":"107-110"},"PeriodicalIF":0.3,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10856836","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143800759","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
Experiment of Wireless Transmission of Cloud Data in Cloud Avoidance Network for Optical Communications Between Space and Ground
IF 0.3
IEICE Communications Express Pub Date : 2025-01-28 DOI: 10.23919/comex.2024XBL0162
Tatsuya Mukai;Yoshihisa Takayama;Yukiya Hanada;Takumi Iwamoto;Takuro Tsuchikawa;Takao Endo
{"title":"Experiment of Wireless Transmission of Cloud Data in Cloud Avoidance Network for Optical Communications Between Space and Ground","authors":"Tatsuya Mukai;Yoshihisa Takayama;Yukiya Hanada;Takumi Iwamoto;Takuro Tsuchikawa;Takao Endo","doi":"10.23919/comex.2024XBL0162","DOIUrl":"https://doi.org/10.23919/comex.2024XBL0162","url":null,"abstract":"Optical communication links between space and ground will be disconnected by cloud blockages only based on optical site diversity, because of cloud blockages randomly changing in time and space. To continue the operation, cloud avoidance network with cloud observation from space and ground and network controls are necessary, however, optical ground stations will be often placed at remote sites without ground wired network. To realize continuous operation under such an environment, our cloud avoidance network is designed to extract and handle only minimum and meaningful information of clouds. The network experiment has been conducted on ground wired network and the operation possibility has been also verified on ground wireless network. In this paper, first, overview of our cloud avoidance network and structures of each equipment on the network, Next, operation possibility of our cloud avoidance network, even based on a low rate communication environment because of the unique system feature of handling only information required for the cloud avoidance network and then, the operation possibility based on the mobile wireless router verified through our experiment are presented.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 3","pages":"87-90"},"PeriodicalIF":0.3,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10856834","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143800829","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
Study of a Simple Measurement Technique for Radiated Emissions from Automotive wire Harnesses by Transfer Function Using a Single Antenna
IF 0.3
IEICE Communications Express Pub Date : 2025-01-28 DOI: 10.23919/comex.2024XBL0194
Tsubasa Suto;Teru Obata;Hiroyasu Sano;Takeshi Ueno;Takuji Arima
{"title":"Study of a Simple Measurement Technique for Radiated Emissions from Automotive wire Harnesses by Transfer Function Using a Single Antenna","authors":"Tsubasa Suto;Teru Obata;Hiroyasu Sano;Takeshi Ueno;Takuji Arima","doi":"10.23919/comex.2024XBL0194","DOIUrl":"https://doi.org/10.23919/comex.2024XBL0194","url":null,"abstract":"This study develops an efficient measurement method for radiated emissions from automotive wire harnesses. The proposed measurement method utilizes the transfer function (T F) between a reference model and a simplified setup model. The results measured by the proposed method show high correlation with the reference measurements. In addition, the proposed method requires only one simple evaluation antenna for measure-ment, whereas the previously proposed TF method requires two antennas. We also attempted to eliminate dips in the measurement by using multiple measurement points for the simple evaluation antenna. In addition, the conventional TF method requires a 4-port VNA, but the proposed method can perform the measurement with a 2-port VNA. Therefore, the proposed method can reduce the cost of the measurement device.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 3","pages":"103-106"},"PeriodicalIF":0.3,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10856833","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143800830","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
Channel Reservation Scheme for Network-Controlled IEEE 802.11 Wireless LANs
IF 0.3
IEICE Communications Express Pub Date : 2025-01-28 DOI: 10.23919/comex.2024XBL0175
Junichi Iwatani;Hirantha Abeysekera;Yusuke Asai;Yasushi Takatori
{"title":"Channel Reservation Scheme for Network-Controlled IEEE 802.11 Wireless LANs","authors":"Junichi Iwatani;Hirantha Abeysekera;Yusuke Asai;Yasushi Takatori","doi":"10.23919/comex.2024XBL0175","DOIUrl":"https://doi.org/10.23919/comex.2024XBL0175","url":null,"abstract":"This paper proposes a priority control method utilizing channel reservation for high-priority access points (APs) in IEEE 802.11 wire-less LAN s. The proposed algorithms are based on a network-controlled channel allocation scheme called RATOP. Computer simulation results demonstrated the positive effect of the proposed scheme on average and minimum throughput in a large area. This paper also proposes an enhanced algorithm that releases reserved channels to improve throughput. An estimation method based on theoretical analysis provides the number of required reserved channels for a given throughput ratio of high-priority APs to low-priority APs.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 3","pages":"95-98"},"PeriodicalIF":0.3,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10856832","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143800827","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 of Lens Antenna with 4x4 Element 4-Port Antenna in the 300-GHz Band
IF 0.3
IEICE Communications Express Pub Date : 2025-01-28 DOI: 10.23919/comex.2024XBL0167
Seiji Nishi;Kazuhiko Tamesue;Kunihisa Jitsuno;Toshio Sato;Takuro Sato;Tetsuya Kawanishi
{"title":"Beam Steering of Lens Antenna with 4x4 Element 4-Port Antenna in the 300-GHz Band","authors":"Seiji Nishi;Kazuhiko Tamesue;Kunihisa Jitsuno;Toshio Sato;Takuro Sato;Tetsuya Kawanishi","doi":"10.23919/comex.2024XBL0167","DOIUrl":"https://doi.org/10.23919/comex.2024XBL0167","url":null,"abstract":"A circular polarized 4x4 element 4-port antenna in the 300 GHz band was designed and fabricated. Antenna gain of more than 10 dBic and axial ratio of less than 3 dB were obtained at 285.12 GHz to 289.44 GHz, which are ch 16 and ch 17 of IEEE 802.15.3d. If the power of the four ports were ideally combined, the antenna gain would increase by 6 dB to 16 dBic. A lens was designed for the circularly polarized 4x4 element 4-port antenna. The focal length of the lens was 100 mm and lens radius is 35 mm. An antenna gain of 40 dBic was calculated using the lens. Placing the 4x4 element 4-port antenna at the focal length of the lens would provide maximum gain, but no beam steering by phase controle. Placing the antenna closer than the focal length would lower the antenna gain but allow beam steering by phase controle. The antenna gain and beam tilt angle were calculated for different distances between the lens and the 4x4 element 4-port antenna. A lens antenna with a lens height of 70 mm was assembled and beam steering was measured.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 3","pages":"91-94"},"PeriodicalIF":0.3,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10856837","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143800958","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信