IEICE Communications Express最新文献_第7页

Dynamic Layer Configuration Methods for Multi-Altitude UAV Routes 多高度无人机航路动态分层配置方法

IF 0.3

IEICE Communications Express Pub Date : 2026-04-01 Epub Date: 2026-02-13 DOI: 10.23919/comex.2025XBL0154

Ryuma Saito;Kiyoshi Ueda;Takumi Miyoshi;Taku Yamazaki;Ryo Yamamoto

引用次数: 0

Relative Angle of Arrival Estimation in Multipath Channels with Omnidirectional Antenna 全向天线多径信道相对到达角估计

IF 0.3

IEICE Communications Express Pub Date : 2026-04-01 Epub Date: 2026-02-13 DOI: 10.23919/comex.2025XBL0169

Koki Morita;Masato Saito;Takaya Yamazato;Hideki Omote;Akihiro Sato;Sho Kimura

{"title":"Relative Angle of Arrival Estimation in Multipath Channels with Omnidirectional Antenna","authors":"Koki Morita;Masato Saito;Takaya Yamazato;Hideki Omote;Akihiro Sato;Sho Kimura","doi":"10.23919/comex.2025XBL0169","DOIUrl":"https://doi.org/10.23919/comex.2025XBL0169","url":null,"abstract":"Accurate sitespecific radio propagation characterization, including both the Power Delay Profile (PDP) and Angle of Arrival (AoA), is critical for deploying mobile communication systems. However, conventional methods are inefficient because PDPs measured with an omnidirectional antenna fail to capture the AoA. Consequently, separate, time-consuming measurements using mechanically rotated directional antennas or complex calibrated array antennas are required. This paper proposes a novel and efficient method for simultaneously estimating both PDP and relative AoA using data obtained from a pair of single moving antenna and a reference antenna. The proposed technique leverages the phase information inherent in the channel data, specifically by processing the phase difference between spatially adjacent profiles acquired during the antenna's movement. This approach eliminates the need for mechanical rotation or specialized array hardware. Experimental results demonstrate the feasibility and effectiveness of the proposed method, highlighting its potential to drastically reduce the time and complexity required for comprehensive channel characterization.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"15 4","pages":"95-98"},"PeriodicalIF":0.3,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11396089","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147606207","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

Binary-Phase Shift Keying Based Time-Domain Index Modulation Signal Detection with Low Power Local Oscillator 基于二相移键控的低功率本振时域指数调制信号检测

IF 0.3

IEICE Communications Express Pub Date : 2026-03-01 Epub Date: 2026-03-16 DOI: 10.23919/comex.2026XBL0009

Wataru Imajuku;Mashu Sawada

引用次数: 0

Accuracy Improvement of Cumulative TDOA/FDOA-Based Geolocation for Unknown Radio Sources Using Dual LEO Satellites 基于累积TDOA/ fdoa的双LEO卫星未知射电源定位精度提高

IF 0.3

IEICE Communications Express Pub Date : 2026-03-01 Epub Date: 2026-03-16 DOI: 10.23919/comex.2026XBL0034

Takeshi Amishima

引用次数: 0

Bidirectional Spectroscopic Method for Measuring Attenuation and Intrinsic Emission Spectra in Fluorescent Optical Fibers 测量荧光光纤衰减和本征发射光谱的双向光谱法

IF 0.3

IEICE Communications Express Pub Date : 2026-03-01 Epub Date: 2026-01-20 DOI: 10.23919/comex.2025XBL0119

Takuya Hamasaki;Yasuhiro Tsutsumi

引用次数: 0

Extending Post-Disaster Network Lifetime through Traffic Offloading to High-Altitude Platform Stations 通过高海拔台站流量分流延长灾后网络寿命

IF 0.3

IEICE Communications Express Pub Date : 2026-03-01 Epub Date: 2026-03-16 DOI: 10.23919/comex.2026XBL0031

Shunsuke Kishi;Hiroki Nishiyama

引用次数: 0

Indoor Radio Wave Measurement System with Integrated Simultaneous Localization and Mapping 集成同步定位与绘图的室内无线电波测量系统

IF 0.3

IEICE Communications Express Pub Date : 2026-03-01 Epub Date: 2026-03-16 DOI: 10.23919/comex.2025XBL0175

Grant Lewis Bulaong;Takuichi Hirano

引用次数: 0

Automating SSVC: A Worst-Case Scenario Approach for Evaluating Human Impact of Vulnerabilities 自动化SSVC：评估脆弱性对人类影响的最坏情况方法

IF 0.3

IEICE Communications Express Pub Date : 2026-03-01 Epub Date: 2026-03-16 DOI: 10.23919/comex.2025XBL0172

Daisuke Tsuji;Yuki Ueki;Nobutaka Kawaguchi;Tomo Kakuta;Hirofumi Nakakoji

{"title":"Automating SSVC: A Worst-Case Scenario Approach for Evaluating Human Impact of Vulnerabilities","authors":"Daisuke Tsuji;Yuki Ueki;Nobutaka Kawaguchi;Tomo Kakuta;Hirofumi Nakakoji","doi":"10.23919/comex.2025XBL0172","DOIUrl":"https://doi.org/10.23919/comex.2025XBL0172","url":null,"abstract":"The number of cybersecurity vulnerabilities continues to rise, which exposes many organizations to critical risk. To address this issue, we aim to automate vulnerability triage by a Stakeholder-Specific Vulnerability Categorization (SSVC) decision tree for deployers. A challenge is that the decision point of Human Impact (HI), which comprises the impact on safety and mission, depends on both organizational context and vulnerability characteristics, making its automated evaluation difficult. We therefore propose a method that automatically determines HI by combining the pre-assessed worst-case impact with the technical impact of a vulnerability. Specifically, in the preparatory phase, we pre-assess the worst-case impact on safety and mission for each CIA triad (Confidentiality, Integrity, and Availability). Then, when a new vulnerability is discovered during the operational phase, the proposed method adjusts the worst-case impact by considering the level of the vulnerability's technical impact to derive the actual HI. The results of experiments using large language models indicates that the proposed method can automatically evaluate HI at near-expert levels. We also discuss the industrial applicability of the proposed method, including its integration with ticketing systems.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"15 5","pages":"156-159"},"PeriodicalIF":0.3,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147808121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A K-Means Clustering Data Selection Method for Low-Complexity Least Squares in Digital Predistortion 数字预失真中低复杂度最小二乘的k均值聚类数据选择方法

IF 0.3

IEICE Communications Express Pub Date : 2026-03-01 Epub Date: 2026-03-16 DOI: 10.23919/comex.2026XBL0014

Gang Yang;Fei Yang;Yanan Luo

{"title":"A K-Means Clustering Data Selection Method for Low-Complexity Least Squares in Digital Predistortion","authors":"Gang Yang;Fei Yang;Yanan Luo","doi":"10.23919/comex.2026XBL0014","DOIUrl":"https://doi.org/10.23919/comex.2026XBL0014","url":null,"abstract":"Digital Predistortion (DPD) is a widely adopted technique to mitigate power amplifier (PA) nonlinearity, where the Least Squares (LS) method is commonly used for predistorter model coefficient estimation. However, the LS method faces a fundamental trade-off between estimation accuracy and computational complexity, where the input data length plays a important role. To address this, this paper proposes a data selection method combining k-means clustering and a Look-Up Table (LUT). First, the k-means algorithm adaptively extracts cluster centers as representative data points, which retain the critical statistical characteristics of the original long sequence by grouping samples with similar nonlinear response patterns. Second, the LUT-based simplification stores precomputed centroids offline and enables hardware-friendly online data selection via squared Euclidean distance discrimination, avoiding real-time clustering overhead. Simulation and experimental results verify that the proposed method only requires input data length of around 250 to achieve −41.5 dB and −51 dB value in Normalized Mean Square Error (NMSE) and Adjacent Channel Power Ratio (ACPR), respectively. Moreover, the LUT simplification introduces negligible performance degradation while significantly reducing hardware latency and resource consumption.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"15 5","pages":"147-151"},"PeriodicalIF":0.3,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147808127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optical-Wireless Cooperative Sleep Control with Traffic Prediction for Energy Efficient Radio Access Network 基于流量预测的高能效无线接入网光无线协同睡眠控制

IF 0.3

IEICE Communications Express Pub Date : 2026-03-01 Epub Date: 2026-03-16 DOI: 10.23919/comex.2025XBL0167

Karin Umeda;Kenji Miyamoto;Tomoya Hatano;Tatsuya Shimada

引用次数: 0