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IEICE Communications Express最新文献

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A Distributed UAV Management System Inspired by Packet-Switched Networks 受分组交换网络启发的分布式无人机管理系统
IF 0.3
IEICE Communications Express Pub Date : 2024-07-09 DOI: 10.23919/comex.2024XBL0101
Takahiko Haraguchi;Hiroshi Katada;Taku Yamazaki;Takumi Miyoshi;Ryo Yamamoto;Kiyoshi Ueda
{"title":"A Distributed UAV Management System Inspired by Packet-Switched Networks","authors":"Takahiko Haraguchi;Hiroshi Katada;Taku Yamazaki;Takumi Miyoshi;Ryo Yamamoto;Kiyoshi Ueda","doi":"10.23919/comex.2024XBL0101","DOIUrl":"https://doi.org/10.23919/comex.2024XBL0101","url":null,"abstract":"Unmanned aerial vehicles (UAVs) are expected to be used in various applications such as delivery services and sensing from airspaces in smart cities. In the future, UAV control systems must address a densely mixed environment comprising various services and users regardless of individuals or businesses. However, users cannot flexibly join or leave the system because of their centralized design. This letter proposes a distributed UAV management system inspired by packet-switched networks, to address dense UAV environments. The proposed system controls autonomous UAVs as packets in packet-switched networks. Each UAV flies along a path composed of links between ground beacon devices as routers. We analyzed the characteristics of the proposed system in dense situations using computer simulation. Simulation results indicate that the proposed system can handle numerous UAVs based on packet-switched networks.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"13 9","pages":"389-392"},"PeriodicalIF":0.3,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10591721","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142090889","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
Multiple-Wave Source Localization Using UAVs in NLOS Environments 在 NLOS 环境中使用无人飞行器进行多波源定位
IF 0.3
IEICE Communications Express Pub Date : 2024-07-09 DOI: 10.23919/comex.2024XBL0104
Shinichi Murata;Takahiro Matsuda;Takefumi Hiraguri
{"title":"Multiple-Wave Source Localization Using UAVs in NLOS Environments","authors":"Shinichi Murata;Takahiro Matsuda;Takefumi Hiraguri","doi":"10.23919/comex.2024XBL0104","DOIUrl":"https://doi.org/10.23919/comex.2024XBL0104","url":null,"abstract":"Localization techniques for unknown radio wave sources are crucial from the perspective of efficient utilization of frequency resources. The authors have studied methods for localizing a single wave source using unmanned aerial vehicles (UAVs) in non-line-of-sight (NLOS) environments based on maximum likelihood estimation. In this study, we propose a localization method for multiple wave sources by extending the singlewave source localization method. In the proposed method, the direction of arrivals (DoAs) at UAVs is modeled with a mixture of von-Mises distributions, and the wave sources are estimated by superimposing the DoA distributions estimated at the UAVs. The proposed method is validated with a simple simulation experiment with two wave sources.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"13 9","pages":"375-378"},"PeriodicalIF":0.3,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10591715","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142090748","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
Genetic Algorithm Optimization of Sensor Placement for CO2 Concentration Observation 遗传算法优化二氧化碳浓度观测传感器的布置
IF 0.3
IEICE Communications Express Pub Date : 2024-07-09 DOI: 10.23919/comex.2024XBL0103
Tomoaki Matsuda;Shusuke Narieda
{"title":"Genetic Algorithm Optimization of Sensor Placement for CO2 Concentration Observation","authors":"Tomoaki Matsuda;Shusuke Narieda","doi":"10.23919/comex.2024XBL0103","DOIUrl":"https://doi.org/10.23919/comex.2024XBL0103","url":null,"abstract":"In our previous studies, we introduced a method for determining the optimal sensor placement of wireless sensor networks for monitoring indoor carbon dioxide (CO2) concentrations. This method, based on brute force, has proven to be accurate and reliable. However, the computational complexity increases exponentially with an increase in the number of sensors. Therefore, this study proposes a novel approach for optimal sensor node placement based on a genetic algorithm (GA) that offers a more efficient alternative to the brute force method. By utilizing the GA, we achieved optimal sensor placement with reduced computational complexity. To validate the effectiveness of our GA based method, we conducted numerical experiments using observed CO2 concentration. The results demonstrate that our proposed approach not only achieves optimal sensor placement but also maintains the accuracy of the observations.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"13 9","pages":"393-396"},"PeriodicalIF":0.3,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10591722","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142091032","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
Construction of the Analog Radio Over Fiber Technology Testbed with Linux PC-Based WiFi Access Points
IF 0.3
IEICE Communications Express Pub Date : 2024-07-09 DOI: 10.23919/comex.2024COL0011
Kojiro Nishimura;Satoru Okamoto;Ryuta Murakami;Naoaki Yamanaka;Motoharu Matsuura
{"title":"Construction of the Analog Radio Over Fiber Technology Testbed with Linux PC-Based WiFi Access Points","authors":"Kojiro Nishimura;Satoru Okamoto;Ryuta Murakami;Naoaki Yamanaka;Motoharu Matsuura","doi":"10.23919/comex.2024COL0011","DOIUrl":"https://doi.org/10.23919/comex.2024COL0011","url":null,"abstract":"We aim to realize a beyond 5th generation (B5G) smart mobile fronthaul (SMFH) that utilizes analog radio over fiber (A-RoF) transmission technology and optical power feed technology by applying newly developed Hollow-Core Fiber. In this paper, to evaluate the feasibility of the SMFH, we will report the successful construction of a A-RoF testbed using an unlicensed WiFi 5 GHz band signal provided by a Linux PC-based access point instead of a licensed 5G sub 6 GHz band signal.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"13 12","pages":"458-460"},"PeriodicalIF":0.3,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10591712","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142761392","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
Primary Channel Selection in Dynamic Channel Bonding Using Laser Chaos Decision Maker
IF 0.3
IEICE Communications Express Pub Date : 2024-07-09 DOI: 10.23919/comex.2024COL0010
Haruto Ando;Aohan Li;Maki Arai;Mikio Hasegawa
{"title":"Primary Channel Selection in Dynamic Channel Bonding Using Laser Chaos Decision Maker","authors":"Haruto Ando;Aohan Li;Maki Arai;Mikio Hasegawa","doi":"10.23919/comex.2024COL0010","DOIUrl":"https://doi.org/10.23919/comex.2024COL0010","url":null,"abstract":"Channel Bonding is a technique used to aggregate multiple wireless communication channels in order to enhance data transfer speeds. Initially introduced in IEEE 802.11n, it has been adapted to the newer IEEE 802.11ax standard, and so on. While this technology enables faster communications, it also suffers from interference issues due to increased bandwidth utilization. Previous studies have extensively focused on bandwidth selection to minimize channel interference, often requiring significant time. This paper proposes an approach that utilizes the Laser chaos decision maker to rapidly determine the optimal channel for dynamic channel bonding. We design our algorithm based on the scalable laser chaos decision maker and evaluate its performance through computer simulations. The results demonstrate that the proposed method has the capability to make more accurate selections than other algorithms.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"13 12","pages":"454-457"},"PeriodicalIF":0.3,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10591714","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142761425","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 Indoor Drone Positioning Using Wi-Fi RTT 利用 Wi-Fi RTT 进行室内无人机定位的实验研究
IF 0.3
IEICE Communications Express Pub Date : 2024-07-09 DOI: 10.23919/comex.2024XBL0102
Yuichiro Sugiyama;Kentaro Kobayashi
{"title":"Experimental Study on Indoor Drone Positioning Using Wi-Fi RTT","authors":"Yuichiro Sugiyama;Kentaro Kobayashi","doi":"10.23919/comex.2024XBL0102","DOIUrl":"https://doi.org/10.23919/comex.2024XBL0102","url":null,"abstract":"As an alternative to GPS, we focus on indoor positioning using Wi-Fi RTT (Round Trip Time), which measures the round trip time to a Wi-Fi access point. Wi-Fi RTT-based positioning has not been well studied for indoor drones. As an experimental study of indoor drone positioning using Wi-Fi RTT, this paper presents a positioning method using a combination of on-board altimeter and Wi-Fi RTT ranging, and experimental results of drone positioning when stationary and hovering to clarify the positioning accuracy in both 2.4 GHz and 5 GHz bands. This paper shows that in both frequency bands, the positioning accuracy is significantly degraded during hovering compared to stationary, and that there is no significant difference between 2.4GHz and 5 GHz bands.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"13 9","pages":"371-374"},"PeriodicalIF":0.3,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10591713","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142091060","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
Visualization Technology for Radio Wave Propagation Characteristics in Sub-Terahertz Band 亚太赫兹波段无线电波传播特性可视化技术
IF 0.3
IEICE Communications Express Pub Date : 2024-07-09 DOI: 10.23919/comex.2024XBL0088
Hikaru Tsuchida;Kazuaki Ishioka;Michiya Hayama;Shusaku Umeda;Akinori Taira
{"title":"Visualization Technology for Radio Wave Propagation Characteristics in Sub-Terahertz Band","authors":"Hikaru Tsuchida;Kazuaki Ishioka;Michiya Hayama;Shusaku Umeda;Akinori Taira","doi":"10.23919/comex.2024XBL0088","DOIUrl":"https://doi.org/10.23919/comex.2024XBL0088","url":null,"abstract":"To analyze the radio wave propagation characteristics, we observed the wavefront as an image using 3-dimensional imaging technology that separates the arrival times of the radio waves. In this paper, by imaging the wavefront, we can observe the radio wave propagation characteristics at each frequency.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"13 9","pages":"363-366"},"PeriodicalIF":0.3,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10591711","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142091034","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
Phase Measurement and Adjustment of Reflector Antenna with Beam Waveguide Feeds 带波束波导馈源的反射天线的相位测量和调整
IF 0.3
IEICE Communications Express Pub Date : 2024-07-09 DOI: 10.23919/comex.2024XBL0064
Shin-Ichi Yamamoto;Hiroto Ado;Ryuya Seki
{"title":"Phase Measurement and Adjustment of Reflector Antenna with Beam Waveguide Feeds","authors":"Shin-Ichi Yamamoto;Hiroto Ado;Ryuya Seki","doi":"10.23919/comex.2024XBL0064","DOIUrl":"https://doi.org/10.23919/comex.2024XBL0064","url":null,"abstract":"When reflector antennas with a beam waveguide feeding system are used in an array configuration, the transmission phase of each reflector antenna must be known and corrected. In this paper, we propose a method in which a reflector plate is placed in the center hole of the main reflector, the reflected phase at the primary radiator horn is measured, and half of the measured phase is used as the transmission phase of the beam waveguide feeding system. The proposed method was verified by calculation, measurement using a simple model with the same path length, and measurement using an actual reflector antenna, and its effectiveness was confirmed.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"13 9","pages":"367-370"},"PeriodicalIF":0.3,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10591716","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142091033","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
Optical Nonlinearity Mitigation Using Reservoir Computing with Tapped-Delay Lines 利用带分接延迟线的储层计算缓解光学非线性问题
IF 0.3
IEICE Communications Express Pub Date : 2024-07-09 DOI: 10.23919/comex.2024XBL0098
Kai Ikuta;Yuta Ito;Moriya Nakamura
{"title":"Optical Nonlinearity Mitigation Using Reservoir Computing with Tapped-Delay Lines","authors":"Kai Ikuta;Yuta Ito;Moriya Nakamura","doi":"10.23919/comex.2024XBL0098","DOIUrl":"https://doi.org/10.23919/comex.2024XBL0098","url":null,"abstract":"We investigated a nonlinear equalizer based on reservoir computing (RC) with tapped-delay lines for compensating for linear and nonlinear waveform distortion caused by, e.g., chromatic dispersion and self-phase modulation. We evaluated and compared the equalization performance of RC systems with and without tapped-delay lines by numerical simulation, while varying the parameters and the transmission distance. The proposed equalizer construction enables the use of RC with a shorter time-constant than that used for conventional RC-based nonlinear equalizers.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"13 9","pages":"384-388"},"PeriodicalIF":0.3,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10591710","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142091061","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
Enhanced SB-SPS Scheme to Mitigate Half Duplex Problem for C-V2X Relay Transmission in Vehicle Platooning
IF 0.3
IEICE Communications Express Pub Date : 2024-07-09 DOI: 10.23919/comex.2024COL0006
Akito Ohshima;Kohei Murata;Kosuke Sanada;Hiroyuki Hatano;Kazuo Mori
{"title":"Enhanced SB-SPS Scheme to Mitigate Half Duplex Problem for C-V2X Relay Transmission in Vehicle Platooning","authors":"Akito Ohshima;Kohei Murata;Kosuke Sanada;Hiroyuki Hatano;Kazuo Mori","doi":"10.23919/comex.2024COL0006","DOIUrl":"https://doi.org/10.23919/comex.2024COL0006","url":null,"abstract":"In vehicle platooning, one of the typical applications of Vehicle-to-Vehicle (V2V) communications using C-V2X (Cellular Vehicle-to-Everything), the vehicles need to exchange information such as the velocity and position of a vehicle leading the platoon to achieve safe platoon driving. Relay transmission using sidelink communications, specified by the C-V2X standard, is considered as a potential approach for information exchange in vehicle platooning. The autonomous resource management scheme, SB-SPS (Sensing Based Semi Persistent Scheduling), has been standardized for sidelink communications. However, half duplex problem, one of major problems in the SB-SPS, is not sufficiently resolved for the relay transmission in vehicle platooning. This work proposes an enhanced SB-SPS scheme to mitigate half duplex problem and improve the transmission performance for the relay transmission in vehicle platooning. The performance evaluation through computer simulation demonstrates the effectiveness of the proposed scheme.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"13 12","pages":"461-465"},"PeriodicalIF":0.3,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10591718","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142761477","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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