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Test Case Generation Using an Attention Seq2Seq Model for Structuring Requirement Specifications 使用注意力Seq2Seq模型生成测试用例以构建需求规范
IF 0.3
IEICE Communications Express Pub Date : 2025-07-11 DOI: 10.23919/comex.2025XBL0079
Yuki Shimizu;Kiyoshi Ueda
{"title":"Test Case Generation Using an Attention Seq2Seq Model for Structuring Requirement Specifications","authors":"Yuki Shimizu;Kiyoshi Ueda","doi":"10.23919/comex.2025XBL0079","DOIUrl":"https://doi.org/10.23919/comex.2025XBL0079","url":null,"abstract":"In the development of large-scale communication software, various methods have been investigated to address challenges such as increasing development costs and shortages of skilled personnel by leveraging machine learning to automatically generate system test cases from requirement specifications. To further improve the accuracy of automatically generated test cases, this study proposes a method that employs deep learning to structure requirement specifications and generate test cases. In particular, we introduce an Attention Seq2Seq model. The proposed model achieved significantly higher accuracy than theLSTM model presented in previous studies.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 9","pages":"346-348"},"PeriodicalIF":0.3,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11078829","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144916320","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
Image Overlay Properties of I-PPM and VPPM Schemes for Rolling Shutter Camera-Based Uplink Screen Camera Communication 基于卷帘式摄像机的上行屏幕摄像机通信中I-PPM和VPPM方案的图像叠加特性
IF 0.3
IEICE Communications Express Pub Date : 2025-07-11 DOI: 10.23919/comex.2025XBL0067
Hayate Ohtani;Wataru Chujo;Kanta Takayanagi;Shodai Kawaguchi;Hideaki Funabashi;Kentaro Kobayashi
{"title":"Image Overlay Properties of I-PPM and VPPM Schemes for Rolling Shutter Camera-Based Uplink Screen Camera Communication","authors":"Hayate Ohtani;Wataru Chujo;Kanta Takayanagi;Shodai Kawaguchi;Hideaki Funabashi;Kentaro Kobayashi","doi":"10.23919/comex.2025XBL0067","DOIUrl":"https://doi.org/10.23919/comex.2025XBL0067","url":null,"abstract":"To increase data rate of screen camera communication (SCC), rolling shutter camera-based SCCs (RS-SCCs) have been studied. Among modulation schemes, inverse pulse position modulation (I-PPM) is the simplest to maintain constant screen luminance. However, image overlay properties of I-PPM have yet to be elucidated. In this study, the properties were clarified for uplink SCC that combined with a small liquid crystal display and a telephoto RS camera. Type of overlay standard image for I-PPMs and variable PPMs (VPPMs) was altered as parameters. Comparison of symbol error rates among I-PPMs and VPPMs demonstrated the most suitable scheme for image overlay RS-SCC.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 9","pages":"338-341"},"PeriodicalIF":0.3,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11078824","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144918347","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
Low-Complexity Grant-Free Random Access Based on Chirp Signals in Asynchronous Scenarios 基于异步啁啾信号的低复杂度无授权随机访问
IF 0.3
IEICE Communications Express Pub Date : 2025-07-11 DOI: 10.23919/comex.2025XBL0076
Yaning Xu;Yurong Guo
{"title":"Low-Complexity Grant-Free Random Access Based on Chirp Signals in Asynchronous Scenarios","authors":"Yaning Xu;Yurong Guo","doi":"10.23919/comex.2025XBL0076","DOIUrl":"https://doi.org/10.23919/comex.2025XBL0076","url":null,"abstract":"Grant-free random access, as a crucial access mechanism in current massive machine-type communication (mMTC) scenarios, can significantly reduce signaling overhead. Base station(BS) achieve joint device activity detection and channel estimation (JADCE) through received pilot sequences. However, time delays severely degrade detection performance and increase computational complexity. In this letter, we first design a novel pilot sequence composed of chirp signals with distinct parity index values. Then, we construct a reduced candidate pilot set by leveraging the invariant parity property of index value sums under time delays. Finally, exploiting the favorable correlation characteristics of the pilot sequences, we propose a low-complexity orthogonal matching pursuit with successive interference cancellation (OMP-SIC) algorithm for solving the JADCE problem in asynchronous multiple access scenarios.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 9","pages":"349-352"},"PeriodicalIF":0.3,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11078826","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144918346","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
Indoor Drone Positioning Methods Using Wi-Fi RTT and Machine Learning 基于Wi-Fi RTT和机器学习的室内无人机定位方法
IF 0.3
IEICE Communications Express Pub Date : 2025-07-11 DOI: 10.23919/comex.2025XBL0087
Yuichiro Sugiyama;Kentaro Kobayashi
{"title":"Indoor Drone Positioning Methods Using Wi-Fi RTT and Machine Learning","authors":"Yuichiro Sugiyama;Kentaro Kobayashi","doi":"10.23919/comex.2025XBL0087","DOIUrl":"https://doi.org/10.23919/comex.2025XBL0087","url":null,"abstract":"For drones to expand their activities, a self-localization method for indoor flying drones is required to complement GPS. We have investigated indoor drone positioning based on Wi-Fi RTT (Round Trip Time). This paper presents methods for estimating the position coordinate of a drone using Wi-Fi RTT and machine learning. In addition to a method that learns actual Wi-Fi RTT ranging data, we propose a novel method that learns pseudo-generated ranging data reproducing Wi-Fi RTT characteristics. Experimental results show that the proposed machine learning-based method using pseudo-generated data achieves higher accuracy than the method that learns actual ranging data and is also superior to the conventional MMSE method.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 9","pages":"342-345"},"PeriodicalIF":0.3,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11078825","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144918348","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
Performance of Thresholded SCL-SGRAND (T-SCLSGRAND) in VLC System 阈值SCL-SGRAND （T-SCLSGRAND）在VLC系统中的性能
IF 0.3
IEICE Communications Express Pub Date : 2025-07-01 DOI: 10.23919/comex.2025XBL0070
Igor Novid;Hiroshi Kamabe
{"title":"Performance of Thresholded SCL-SGRAND (T-SCLSGRAND) in VLC System","authors":"Igor Novid;Hiroshi Kamabe","doi":"10.23919/comex.2025XBL0070","DOIUrl":"https://doi.org/10.23919/comex.2025XBL0070","url":null,"abstract":"Visible light communication (VLC) has emerged as an alternative to data communication, offering higher bandwidth than radio communication. To fully leverage its advantages, Polar codes, recognized as capacity-achieving codes, are employed in serial concatenation with run-length limited (RLL). In this paper, we propose an enhancement to our previous decoding method, successive cancellation list - soft guessing random additive noise decoding (SCL-SGRAND), termed thresholded SCLSGRAND (T-SCLSGRAND). By introducing a variable called the threshold <tex>$t$</tex>, which reduces the length of the soft information used as the input for SGRAND in T-SCLSGRAND, this method demonstrates improved bit-error rate (BER) performance compared to successive cancellation list (SCL) and cyclic redundancy check (CRC)-aided SCL (CA-SCL) by 0.7 and 0.2 dB, respectively, under a small upper limit <tex>$b$</tex>.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 9","pages":"353-356"},"PeriodicalIF":0.3,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11062679","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144916319","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
Trellis-Based Error-Correctable Shaping Method for Probabilistically-Shaped Quadrature Amplitude Modulation 基于栅格的概率形正交调幅误差校正整形方法
IF 0.3
IEICE Communications Express Pub Date : 2025-07-01 DOI: 10.23919/comex.2025XBL0072
Mamoru Komatsu;Akira Naka
{"title":"Trellis-Based Error-Correctable Shaping Method for Probabilistically-Shaped Quadrature Amplitude Modulation","authors":"Mamoru Komatsu;Akira Naka","doi":"10.23919/comex.2025XBL0072","DOIUrl":"https://doi.org/10.23919/comex.2025XBL0072","url":null,"abstract":"This letter proposes the error-correctable shaping method based on the trellis diagram defined in enumerative sphere shaping (ESS), refer to trellis-based error-correctable ESS (TE-ESS), to mitigate one of the implementation issues in probabilistic amplitude shaping (PAS). To introduce the residual error detection and correction, TE-ESS modifies the trellis diagram of ESS to restrict the output amplitude sequence which correspond to even-or odd-parity. Numerical simulations show that TE-ESS outperforms the previously proposed error-correctable shaping method. In addition, Its error correction effectively alleviates the error floor requirement in FEC code, compared to using ESS, in low BER region.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 9","pages":"334-337"},"PeriodicalIF":0.3,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11062678","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144918124","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 in Antennas and Propagation Technologies 2024 天线与传播技术专项集群2024
IF 0.3
IEICE Communications Express Pub Date : 2025-06-02 DOI: 10.23919/comex.2025SPF0001
{"title":"Special Cluster in Antennas and Propagation Technologies 2024","authors":"","doi":"10.23919/comex.2025SPF0001","DOIUrl":"https://doi.org/10.23919/comex.2025SPF0001","url":null,"abstract":"The objective of this special cluster is to present advanced technologies in antennas and propagation, including next-generation mobile communication systems, MIMO, PAN/BAN, metamaterials, and wireless power transmission. The scope also covers electromagnetic wave theory and related areas, with a focus on emerging topics such as metamaterials, nano-electromagnetics, and their antenna applications.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 6","pages":"205-205"},"PeriodicalIF":0.3,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11021590","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144196829","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
Transmission Timing Synchronization Method Based on Results of Cross-Correlation in Distributed TDMA-MIMO Radar 基于互关结果的分布式TDMA-MIMO雷达传输时序同步方法
IF 0.3
IEICE Communications Express Pub Date : 2025-04-11 DOI: 10.23919/comex.2025SPL0015
Yoshiki Takahashi;Hiroyoshi Yamada;Tadashi Oshima
{"title":"Transmission Timing Synchronization Method Based on Results of Cross-Correlation in Distributed TDMA-MIMO Radar","authors":"Yoshiki Takahashi;Hiroyoshi Yamada;Tadashi Oshima","doi":"10.23919/comex.2025SPL0015","DOIUrl":"https://doi.org/10.23919/comex.2025SPL0015","url":null,"abstract":"High angular resolution is required for millimeter-wave radar, which is currently being studied for application. One method for improving angular resolution is distributed Time Division Multiple Access (TDMA)-Multiple Input Multiple Output (MIMO) radar. In order to realize a distributed TDMA-MIMO radar using millimeter wave radar, it is necessary to use delay circuit with extremely high precision. Such highprecision timing control is difficult to achieve with millimeter waves, which makes distributed radar difficult to implement. In this letter, we propose a timing synchronization method based on the results of cross-correlation calculations, assuming that delay circuit with sufficient precision cannot be used due to cost and other reasons, and demonstrate its effectiveness through computer simulations and evaluations using experimental data.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 6","pages":"233-237"},"PeriodicalIF":0.3,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10964020","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144196833","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 Retrieval Method Using a Single Planar Near-Field Measurement 基于单平面近场测量的相位反演方法
IF 0.3
IEICE Communications Express Pub Date : 2025-04-11 DOI: 10.23919/comex.2025XBL0020
Inhyeok Choi;Hiroyuki Arai
{"title":"Phase Retrieval Method Using a Single Planar Near-Field Measurement","authors":"Inhyeok Choi;Hiroyuki Arai","doi":"10.23919/comex.2025XBL0020","DOIUrl":"https://doi.org/10.23919/comex.2025XBL0020","url":null,"abstract":"In recent years, wireless measurement methods in the near-field are developed for antenna performance evaluation. The phase measurement is difficult in near-field above the millimeter wave band, then a method to retrieve the phase using only amplitude information from a sampling plane is investigated. In this paper, we propose a method that utilizes only a single planar measurement as a faster and simpler phase retrieval method.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 6","pages":"254-256"},"PeriodicalIF":0.3,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10964021","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144196914","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
Ultra-High Splitting Ratio Access Network with Optical Power Feeding Using a Hollow Core Fiber 采用空芯光纤光功率馈电的超高分裂比接入网
IF 0.3
IEICE Communications Express Pub Date : 2025-04-11 DOI: 10.23919/comex.2025XBL0050
Shumpei Kimura;Zhixin Liu;Motoharu Matsuura;Takeshi Takagi;Kazunori Mukasa;Satoru Okamoto;Naoaki Yamanaka;Hiroyuki Tsuda
{"title":"Ultra-High Splitting Ratio Access Network with Optical Power Feeding Using a Hollow Core Fiber","authors":"Shumpei Kimura;Zhixin Liu;Motoharu Matsuura;Takeshi Takagi;Kazunori Mukasa;Satoru Okamoto;Naoaki Yamanaka;Hiroyuki Tsuda","doi":"10.23919/comex.2025XBL0050","DOIUrl":"https://doi.org/10.23919/comex.2025XBL0050","url":null,"abstract":"We propose and investigate an ultra-high splitting ratio passive optical network (PON) using a hollow core fiber (HCF). An HCF is used for one of the downstream link for power delivery through feeding light, which powers an optical amplifier for the upstream that improves uplink power budget. We perform simulations to evaluate the maximum splitting ratio of the proposed HCF-based PONs. We show that the proposed system can support up to 4096 users in 25 Gbps non-return-to-zero (NRZ) intensity-modulation (IM) and direct detection (DD), as well as 1024 users in 25 Gbaud 16QAM transmission.","PeriodicalId":54101,"journal":{"name":"IEICE Communications Express","volume":"14 6","pages":"263-266"},"PeriodicalIF":0.3,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10964026","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144196832","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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