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Experimental Evaluation of the Impact of Physical Space Information on Wireless Link Quality Estimation 物理空间信息对无线链路质量估计影响的实验评估
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 增益不平衡下模拟RoF下行链路上的预均衡MIMO传输
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
Experimental Study on Polarimetric Filtering in Ocean Radar 海洋雷达极化滤波的实验研究
IF 0.3
IEICE Communications Express Pub Date : 2025-02-25 DOI: 10.23919/comex.2025SPL0005
Akira Matsuda;Hiroyoshi Yamada;Satoshi Fujii;Yasunori Osana;Takuji Arima;Toru Uno
{"title":"Experimental Study on Polarimetric Filtering in Ocean Radar","authors":"Akira Matsuda;Hiroyoshi Yamada;Satoshi Fujii;Yasunori Osana;Takuji Arima;Toru Uno","doi":"10.23919/comex.2025SPL0005","DOIUrl":"https://doi.org/10.23919/comex.2025SPL0005","url":null,"abstract":"An ocean radar can retrieve information about surface currents and wave heights from the first- and second-order scattering caused by Bragg scattering. However, when the spectra of the first- and second-order scattering overlap with the signal from an aircraft target, accurately determining the first- and second-order scattering values becomes challenging. To effectively observe the ocean wave, it is necessary to suppress the aircraft target signal and to enhance the ocean wave signal. Conversely, for the multipurpose application of ocean radar, such as detecting moving targets like aircraft, the suppression of the ocean wave signal and enhancement of the aircraft target signal are required. This paper demonstrates, through experimental results, that polarimetric filtering can be applied in ocean radar to selectively enhance or suppress the desired signal.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 6","pages":"206-209"},"PeriodicalIF":0.3,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10904076","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144196691","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 结合iWAT 2024主要议题的天线和传播技术专题讨论会
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 基于Mamdani模糊推理系统的智能天线分类方法
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 一种基于码分复用的音频流高性能可逆数据隐藏方案
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
Study of a Simple Measurement Technique for Radiated Emissions from Automotive wire Harnesses by Transfer Function Using a Single Antenna 基于单天线传递函数的汽车线束辐射发射简单测量技术研究
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
Experiment of Wireless Transmission of Cloud Data in Cloud Avoidance Network for Optical Communications Between Space and Ground 空间与地面光通信避云网络中云数据无线传输实验
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
Channel Reservation Scheme for Network-Controlled IEEE 802.11 Wireless LANs 网络控制IEEE 802.11无线局域网的信道预留方案
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
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