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Demonstration of Aircraft Localization by TDOA, AOA, and Barometric Altitude at Two Sites 用两个地点的TDOA、AOA和气压高度进行飞机定位的演示
IF 0.3
IEICE Communications Express Pub Date : 2025-04-11 DOI: 10.23919/comex.2025XBL0045
Junichi Naganawa;Yoshio Kosuge;Jun Kitaori;Hirohisa Tajima;Tadashi Koga
{"title":"Demonstration of Aircraft Localization by TDOA, AOA, and Barometric Altitude at Two Sites","authors":"Junichi Naganawa;Yoshio Kosuge;Jun Kitaori;Hirohisa Tajima;Tadashi Koga","doi":"10.23919/comex.2025XBL0045","DOIUrl":"https://doi.org/10.23919/comex.2025XBL0045","url":null,"abstract":"Aircraft localization systems that use time difference of arrival (TDOA) measurements, called wide-area multilateration (WAM) systems, have been deployed for air traffic control. Although WAM performs better than radar, it requires a large number of ground stations. A possible solution by which to reduce the number of stations is to obtain additional measurements, such as the angle of arrival (AOA) and barometric altitude. However, the feasibility of hybrid localization has not been experimentally proven. Therefore, this study presents an experiment on aircraft localization using TDOA, AOA, and barometric altitude measurements to demonstrate that aircraft localization at only two sites is possible.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 6","pages":"246-249"},"PeriodicalIF":0.3,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10964017","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144196877","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
Far-Field $kQ$ Theory for Hertzian Dipoles in Two- and Three-Dimensional Infinite Free Spaces 二维和三维无限自由空间中赫兹偶极子的远场kQ理论
IF 0.3
IEICE Communications Express Pub Date : 2025-04-11 DOI: 10.23919/comex.2025SPL0013
Takashi Ohira
{"title":"Far-Field $kQ$ Theory for Hertzian Dipoles in Two- and Three-Dimensional Infinite Free Spaces","authors":"Takashi Ohira","doi":"10.23919/comex.2025SPL0013","DOIUrl":"https://doi.org/10.23919/comex.2025SPL0013","url":null,"abstract":"This study considers the electromagnetic coupling between two Hertzian dipoles located in two- and three-dimensional free spaces. First, we briefly review the generalized <tex>$kQ$</tex> theory with respect to the reciprocal two-port impedance matrix. The <tex>$kQ$</tex> concept is then applied to a basic 2D problem, where a pair of Hertzian dipoles is sandwiched between infinitely wide parallel conductor plates. One dipole is excited by a sinusoidal current, and the other dipole observes the voltage induced across it. Solving a 2D Helmholtz equation yields <tex>$kQ=sqrt{lambda/d}/pi$</tex>, where <tex>$lambda$</tex> is the wavelength and <tex>$d$</tex> is the distance between the dipoles. Similarly, we apply the <tex>$kQ$</tex> theory to a 3D problem and obtain <tex>$kQ=3lambda/4pi d$</tex>. Because a Hertzian dipole is a building block for practical antennas, the results of this study will offer a theoretical foundation for developing various types of wireless power transfer systems.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 6","pages":"238-241"},"PeriodicalIF":0.3,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10964018","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144196831","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
Implementation of Density Evolution for Polar Codes Based on Monte Carlo Simulation 基于蒙特卡罗仿真的极码密度演化实现
IF 0.3
IEICE Communications Express Pub Date : 2025-04-11 DOI: 10.23919/comex.2025XBL0044
Nobuhiko Miki;Satoshi Suyama;Satoshi Nagata
{"title":"Implementation of Density Evolution for Polar Codes Based on Monte Carlo Simulation","authors":"Nobuhiko Miki;Satoshi Suyama;Satoshi Nagata","doi":"10.23919/comex.2025XBL0044","DOIUrl":"https://doi.org/10.23919/comex.2025XBL0044","url":null,"abstract":"Density evolution (DE) plays a fundamental role in the analysis of channel coding systems employing iterative decoding, and it is a valuable tool to design such systems. This letter discusses the implementation of DE for polar codes. In this letter, fast Fourier transform based methods are difficult to apply due to the difficulty in optimizing the parameters, and therefore, DE is performed using a Monte Carlo simulation. Finally, examples of the applications of this method are presented.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 6","pages":"250-253"},"PeriodicalIF":0.3,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10964027","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144196566","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
Inter-Symbol Interference Mitigation Using Adaptive Dataset Selection in the Parzen Window Method 基于Parzen窗口法自适应数据集选择的符号间干扰抑制
IF 0.3
IEICE Communications Express Pub Date : 2025-04-11 DOI: 10.23919/comex.2025XBL0047
Shoma Ito;Hirokazu Kubota;Yuji Miyoshi
{"title":"Inter-Symbol Interference Mitigation Using Adaptive Dataset Selection in the Parzen Window Method","authors":"Shoma Ito;Hirokazu Kubota;Yuji Miyoshi","doi":"10.23919/comex.2025XBL0047","DOIUrl":"https://doi.org/10.23919/comex.2025XBL0047","url":null,"abstract":"We propose a detection method based on the Parzen window method to mitigate inter-symbol interference. This method selects a trained dataset based on the neighboring symbols, following a decision feedback approach. Simulation results show the proposed method achieved a 3.3 dB improvement in the Q value for a QPSK signal degraded by inter-symbol interference.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 6","pages":"260-262"},"PeriodicalIF":0.3,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10964025","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144196915","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
Compensating Image Overlay 16QAM Using Dual Cameras for Rolling Shutter-Based Screen Camera Communication 基于卷帘式屏幕摄像机通信的双相机补偿图像覆盖16QAM
IF 0.3
IEICE Communications Express Pub Date : 2025-04-11 DOI: 10.23919/comex.2025XBL0033
Hayate Ohtani;Wataru Chujo;Kentaro Kobayashi
{"title":"Compensating Image Overlay 16QAM Using Dual Cameras for Rolling Shutter-Based Screen Camera Communication","authors":"Hayate Ohtani;Wataru Chujo;Kentaro Kobayashi","doi":"10.23919/comex.2025XBL0033","DOIUrl":"https://doi.org/10.23919/comex.2025XBL0033","url":null,"abstract":"Image overlay uplink screen camera communication consisting of a small display with LED backlight modulation and an indoor rolling shutter camera has been studied. A previous study demonstrated that image overlay QPSK was achieved by compensating pixel values of the overlaid image using dual cameras. However, even after the compensation, variation in the pixel values remained, making it difficult to realize further M-ary modulation. In this study, a compensation method taking both the overlaid image and backlight modulation into account is proposed. Constellation, error vector magnitude, and bit error rate for image overlay 16QAM are experimentally evaluated using dual cameras.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 6","pages":"242-245"},"PeriodicalIF":0.3,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10964019","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144196625","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
Satellite Signal Arrival Direction Estimation to Reduce Multipath Errors Using General-Purpose Receivers and the Multiple Signal Classification (MUSIC) Method in Satellite Positioning 基于通用接收机和多信号分类（MUSIC）方法的卫星信号到达方向估计减少卫星定位中的多径误差
IF 0.3
IEICE Communications Express Pub Date : 2025-04-11 DOI: 10.23919/comex.2025XBL0034
Hiromune Namie;Dai Nagafuchi;Takemitsu Fujita
{"title":"Satellite Signal Arrival Direction Estimation to Reduce Multipath Errors Using General-Purpose Receivers and the Multiple Signal Classification (MUSIC) Method in Satellite Positioning","authors":"Hiromune Namie;Dai Nagafuchi;Takemitsu Fujita","doi":"10.23919/comex.2025XBL0034","DOIUrl":"https://doi.org/10.23919/comex.2025XBL0034","url":null,"abstract":"Satellite positioning has become accurate to the millimeter order with the use of carrier phase observation data for distance measurement, but one type of error namely multipath error remaines. In this research, as a preliminary step to reducing multipath errors using the data observed with an array antenna, we used a general-purpose receiver and the MUltiple SIgnal Classification (MUSIC) method to determine the direction of arrival of satellite signals. It was found that the direction of arrival of satellite signals can be estimated from pseudo carrier phase observation data using the MUSIC method.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 6","pages":"257-259"},"PeriodicalIF":0.3,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10964029","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144196878","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
Code-Based Butterfly Key Expansion for Pseudonymous Certificates 假名证书的基于代码的蝴蝶密钥扩展
IF 0.3
IEICE Communications Express Pub Date : 2025-03-15 DOI: 10.23919/comex.2025XBL0066
Abel C. H. Chen
{"title":"Code-Based Butterfly Key Expansion for Pseudonymous Certificates","authors":"Abel C. H. Chen","doi":"10.23919/comex.2025XBL0066","DOIUrl":"https://doi.org/10.23919/comex.2025XBL0066","url":null,"abstract":"As quantum computing technology continues to advance, Shor's quantum algorithm poses a significant threat to mainstream cryptographic methods, including RSA and elliptic curve cryptography. Consequently, post-quantum cryptography (PQC) has emerged as an inevitable trend for the future. Among PQC approaches, lattice-based cryptography and hash-based cryptography have already been standardized, while code-based cryptography remains a candidate for standardization. In light of these developments, this study proposes a Code-based Butterfly Key Expansion (CBKE) mechanism, built on code-based cryptography principles. The proposed method enables a registration authority (RA) to expand an original code-based caterpillar public key into a code-based cocoon public key, achieving anonymity for entities other than the RA. Subsequently, a certificate authority further expands the code-based cocoon public key into a code-based butterfly public key, which is then embedded in a pseudonymous certificate as the public key for the end entity. This approach ensures anonymity for both the RA and other entities. To enhance computational efficiency, the study proposes a random invertible matrix generation algorithm with a time complexity of O(n). This algorithm achieves high efficiency and anonymity without increasing the key length, thereby addressing the computational demands of the proposed method effectively.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 7","pages":"296-299"},"PeriodicalIF":0.3,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11005705","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144671114","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
QoE-Aware Playback Buffer Level Control Strategy for Adaptive Video Streaming Using MPEG-DASH 基于MPEG-DASH的自适应视频流的qos感知回放缓冲级别控制策略
IF 0.3
IEICE Communications Express Pub Date : 2025-03-15 DOI: 10.23919/comex.2025XBL0035
Hiroki Kamihira;Ryogo Kubo
{"title":"QoE-Aware Playback Buffer Level Control Strategy for Adaptive Video Streaming Using MPEG-DASH","authors":"Hiroki Kamihira;Ryogo Kubo","doi":"10.23919/comex.2025XBL0035","DOIUrl":"https://doi.org/10.23919/comex.2025XBL0035","url":null,"abstract":"Adaptive video streaming using Moving Picture Experts Group dynamic adaptive streaming over Hypertext Transfer Protocol (MPEG-DASH) enables adaptive bitrate (ABR) control based on network conditions. Network conditions can be estimated based on the network throughput or playback buffer level. However, the conventional proportional-derivative (PD)-based ABR algorithm that considers both network through-put and playback buffer level can degrade the quality of experience (QoE) when the available bandwidth of each user fluctuates. This study proposes an ABR algorithm that combines multiple bitrate selection methods using PD control and buffer-based throughput estimation, considering buffer-level fluctuations to achieve a stable bitrate and buffer-level control. Simulations confirm that the proposed algorithm improves QoE under multi-user and throughput-varying conditions and does not negatively impact another ABR algorithm in a heterogeneous environment.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 7","pages":"283-286"},"PeriodicalIF":0.3,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11005711","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144671112","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
Proximity Radiation Immunity Test Method for In-Vehicle Electronic Components 车载电子元件近距离抗辐射试验方法
IF 0.3
IEICE Communications Express Pub Date : 2025-03-15 DOI: 10.23919/comex.2025XBL0055
Katsushige Harima;Takayuki Kubo;Kaoru Gotoh;Takeshi Ishida
{"title":"Proximity Radiation Immunity Test Method for In-Vehicle Electronic Components","authors":"Katsushige Harima;Takayuki Kubo;Kaoru Gotoh;Takeshi Ishida","doi":"10.23919/comex.2025XBL0055","DOIUrl":"https://doi.org/10.23919/comex.2025XBL0055","url":null,"abstract":"The radiated immunity test methods for in-vehicle equipment with wiring harnesses are specified by manufacturers or international standards. These test methods require high-power amplifiers to satisfy the specified electric field strength. A proximity radiation test method using antenna scanning is proposed to reduce the transmitting power. The effect of the electric field radiated by the conventional and proposed methods on the harnesses is evaluated using a long wire antenna. The proposed method is shown to be an effective pretest method for the conventional test.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 7","pages":"271-274"},"PeriodicalIF":0.3,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11005712","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144671249","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 Implementation of Routing in Wireless Mesh Networks Using the Maximum Flow Problem 利用最大流量问题实现无线网状网络中的路由
IF 0.3
IEICE Communications Express Pub Date : 2025-03-15 DOI: 10.23919/comex.2025XBL0056
Takato Fukugami;Tomofumi Matsuzawa
{"title":"An Implementation of Routing in Wireless Mesh Networks Using the Maximum Flow Problem","authors":"Takato Fukugami;Tomofumi Matsuzawa","doi":"10.23919/comex.2025XBL0056","DOIUrl":"https://doi.org/10.23919/comex.2025XBL0056","url":null,"abstract":"As sensor nodes that constitute a wireless sensor network are battery-powered, it is essential to extend their life. Wireless mesh network, one type of wireless sensor network, require routing and must consider power consumption. However, existing methods that are based on the shortest paths are insufficient to reduce power consumption. In this study, we propose a routing method that considers the maximum flow problem. Experimental results show that the proposed method increased the time until a node that runs out of battery first occurs.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 7","pages":"275-278"},"PeriodicalIF":0.3,"publicationDate":"2025-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11005706","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144671250","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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