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Comparison of Position Estimation Accuracy in Polar and Rectangular Coordinate Systems Using Wi-Fi CSI 基于Wi-Fi CSI的极坐标系和直角坐标系下位置估计精度比较
2023 VTS Asia Pacific Wireless Communications Symposium (APWCS) Pub Date : 2023-08-01 DOI: 10.1109/APWCS60142.2023.10234071
Shunsuke Usaka, M. Ogawa
{"title":"Comparison of Position Estimation Accuracy in Polar and Rectangular Coordinate Systems Using Wi-Fi CSI","authors":"Shunsuke Usaka, M. Ogawa","doi":"10.1109/APWCS60142.2023.10234071","DOIUrl":"https://doi.org/10.1109/APWCS60142.2023.10234071","url":null,"abstract":"Prior knowledge utilizing Channel State Information (CSI) and the precise spatial coordinates is imperative for accurately determining an individual’s whereabouts through the utilization of Wi-Fi CSI. In the present study, we employ LiDAR to ascertain the precise spatial coordinates. We conduct a comparative analysis of the estimation precision across various quantities of CSI receivers, as well as different coordinate systems pertaining to the ground-truth position. The quantity of CSI receivers directly impacts the expansion of the sensing area. Conversely, there exist both polar and rectangular coordinate systems, serving the purpose of elucidating the most suitable coordinate system for position estimation. To achieve this, we employ a neural network regression model and gauge the mean absolute error (MAE) as a metric for estimation precision. The assessment outcomes indicate that estimation precision escalates with an increased number of CSI receivers. Moreover, the rectangular coordinate system yields greater accuracy as opposed to the polar coordinate system.","PeriodicalId":375211,"journal":{"name":"2023 VTS Asia Pacific Wireless Communications Symposium (APWCS)","volume":"516 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127509916","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 study on indoor drone positioning using Wi-Fi RTT ranging 基于Wi-Fi RTT测距的室内无人机定位研究
2023 VTS Asia Pacific Wireless Communications Symposium (APWCS) Pub Date : 2023-08-01 DOI: 10.1109/APWCS60142.2023.10234042
Yuichiro Sugiyama, Kentaro Kobayashi, W. Chujo
{"title":"A study on indoor drone positioning using Wi-Fi RTT ranging","authors":"Yuichiro Sugiyama, Kentaro Kobayashi, W. Chujo","doi":"10.1109/APWCS60142.2023.10234042","DOIUrl":"https://doi.org/10.1109/APWCS60142.2023.10234042","url":null,"abstract":"As an alternative to GPS, we focus on indoor positioning using Wi-Fi RTT, which measures the distance to a Wi-Fi access point based on the time required to communicate with it. Wi-Fi RTT-based positioning has not yet been sufficiently studied for drones in flight. In this paper, as a study of indoor drone positioning using Wi-Fi RTT, we evaluate and compare the position estimation results when the drone is stationary and hovering, and when the access point location is changed. The measurement results show that the standard deviation of the estimated position is larger when the drone is hovering than when it is stationary, that the standard deviation is larger when the drone is hovering as the distance between the AP and the drone increases, and that the estimation results deteriorate significantly when the AP and the drone are too close to each other.","PeriodicalId":375211,"journal":{"name":"2023 VTS Asia Pacific Wireless Communications Symposium (APWCS)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134482265","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 Platform for Real-Time Syringe Measurement Validation Using Computer Vision and IoT 基于计算机视觉和物联网的实时注射器测量验证平台
2023 VTS Asia Pacific Wireless Communications Symposium (APWCS) Pub Date : 2023-08-01 DOI: 10.1109/APWCS60142.2023.10234072
Yun-Wei Lin, Kai-chun Chuang
{"title":"A Platform for Real-Time Syringe Measurement Validation Using Computer Vision and IoT","authors":"Yun-Wei Lin, Kai-chun Chuang","doi":"10.1109/APWCS60142.2023.10234072","DOIUrl":"https://doi.org/10.1109/APWCS60142.2023.10234072","url":null,"abstract":"In the healthcare industry, ensuring accurate medication administration is crucial for patient safety. However, the process of medication administration is not as simple as it seems, and medication errors remain a significant concern. Specifically, syringe-based medications pose challenges due to variations in units (e.g., mg, IU) and the need for dilution in certain cases. To address this, we propose a real-time medication administration verification platform. This platform, designed for syringe-based medications, incorporates an IoT web application user interface and terminal devices equipped with machine vision, edge computing, and IoT technologies. By monitoring and validating the medication administration process in real-time, healthcare professionals can effectively verify medication accuracy and enhance patient safety.","PeriodicalId":375211,"journal":{"name":"2023 VTS Asia Pacific Wireless Communications Symposium (APWCS)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133366337","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
Performance Evaluation of Multi-Attribute Conditional Handover in LEO Satellite Networks 低轨道卫星网络多属性条件切换性能评价
2023 VTS Asia Pacific Wireless Communications Symposium (APWCS) Pub Date : 2023-08-01 DOI: 10.1109/APWCS60142.2023.10234055
Won-Jae Lee, Jongtae Lee, Jae-Hyun Kim
{"title":"Performance Evaluation of Multi-Attribute Conditional Handover in LEO Satellite Networks","authors":"Won-Jae Lee, Jongtae Lee, Jae-Hyun Kim","doi":"10.1109/APWCS60142.2023.10234055","DOIUrl":"https://doi.org/10.1109/APWCS60142.2023.10234055","url":null,"abstract":"Recently, low earth orbit (LEO) satellite has been attracting attention for communication. It supports higher link quality and reduces propagation delay compared with geostationary orbit (GEO) satellite. However, a single LEO satellite can not support continuous service due to small coverage and fast velocity. Therefore, LEO satellite constellation is needed. Handover (HO) scheme is important to support continuous service. However, the HO scheme is made for terrestrial network (TN). It is hard to apply HO scheme to Non-TN (NTN). We propose multi-attribute HO scheme for the NTN. The proposed HO scheme considers signal strength and time-of-stay (ToS). Simulation results show that the HO scheme based on multi-attribute is adjusted in NTN.","PeriodicalId":375211,"journal":{"name":"2023 VTS Asia Pacific Wireless Communications Symposium (APWCS)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131195178","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 study on indoor positioning of an open-source drone using AR markers 基于AR标记的开源无人机室内定位研究
2023 VTS Asia Pacific Wireless Communications Symposium (APWCS) Pub Date : 2023-08-01 DOI: 10.1109/APWCS60142.2023.10233961
Tomoki Okaya, Kentaro Kobayashi, W. Chujo
{"title":"A study on indoor positioning of an open-source drone using AR markers","authors":"Tomoki Okaya, Kentaro Kobayashi, W. Chujo","doi":"10.1109/APWCS60142.2023.10233961","DOIUrl":"https://doi.org/10.1109/APWCS60142.2023.10233961","url":null,"abstract":"When drones fly autonomously, GPS is basically used to establish navigation and safety functions. However, the above functions cannot be used in non-GPS environments such as indoor flight. This study focuses on indoor drone positioning using AR markers and aims to clarify its accuracy with a self-localization algorithm based on open-source platform. In the experimental evaluation, the drone flies autonomously by detecting AR markers with a drone-mounted camera, and its position coordinate data are collected to evaluate the accuracy of the self-localization. In particular, this paper evaluates the contribution of the position estimation by the AR markers to the self-localization computed by the flight controller, and shows that the self-localization accuracy is highly dependent on the position estimation by the AR markers, and its accuracy is about 1 to 2 cm.","PeriodicalId":375211,"journal":{"name":"2023 VTS Asia Pacific Wireless Communications Symposium (APWCS)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115692553","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
Robust Anti-Jamming Beamforming Scheme for Cellular-Connected Mobile UAV 蜂窝互联移动无人机鲁棒抗干扰波束形成方案
2023 VTS Asia Pacific Wireless Communications Symposium (APWCS) Pub Date : 2023-08-01 DOI: 10.1109/APWCS60142.2023.10234032
Jiajia Huang, E. Kurniawan, Sumei Sun
{"title":"Robust Anti-Jamming Beamforming Scheme for Cellular-Connected Mobile UAV","authors":"Jiajia Huang, E. Kurniawan, Sumei Sun","doi":"10.1109/APWCS60142.2023.10234032","DOIUrl":"https://doi.org/10.1109/APWCS60142.2023.10234032","url":null,"abstract":"Beamforming is a promising anti-jamming technique for cellular-connected unmanned aerial vehicle (UAV) system. It is challenging to design anti-jamming beamforming vectors for moving UAV with imperfect CSI. In this paper, we consider an uplink transmission from UAV to multi-antenna ground base station (BS) in the presence of a malicious ground jammer. We propose a deep learning based beamforming network (DLBF) to maximize the average data rate for moving UAV in the presence of a ground jammer. Complexity analysis shows that DLBF has linear complexity, which indicates good scalability in large antenna arrays. Extensive simulation results show that anti-jamming DLBF improves average data rate for moving UAV. The performance of DLBF advantage is robust under imperfect CSI and different antenna configurations.","PeriodicalId":375211,"journal":{"name":"2023 VTS Asia Pacific Wireless Communications Symposium (APWCS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131314885","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
Cooperative Beamforming-Assisted LEO Satellite Positioning for V2X 协同波束形成辅助低轨道卫星V2X定位
2023 VTS Asia Pacific Wireless Communications Symposium (APWCS) Pub Date : 2023-08-01 DOI: 10.1109/APWCS60142.2023.10234031
Jen-Tse Chen, Bo-Heng Yeh, Jen-Ming Wu
{"title":"Cooperative Beamforming-Assisted LEO Satellite Positioning for V2X","authors":"Jen-Tse Chen, Bo-Heng Yeh, Jen-Ming Wu","doi":"10.1109/APWCS60142.2023.10234031","DOIUrl":"https://doi.org/10.1109/APWCS60142.2023.10234031","url":null,"abstract":"Navigation with low Earth orbit (LEO) satellites becomes a popular topic in recent years. In contrast to traditional satellite positioning systems, the power consumption and latency experienced in LEO satellite positioning are much smaller. However, positioning with LEO satellites would not guarantee higher positioning accuracy compared to Global Positioning System (GPS). To this end, we proposed a cooperative positioning method to reduce the positioning error by correcting the position coordinates obtained from LEO satellites. In our method, the relative angles between devices would be estimated by beamforming. We leverage the angles and position information of neighboring devices to correct the position of the target, which is a kind of angle-based method. The simulation results showed that the positioning error can be improved by 36.8 % while the standard deviation of measurement noise is 5 m and the horizontal dilution of precision (HDOP) is 1.57. Moreover, our method has very low complexity, which is suitable for practical use, such as vehicular localization in vehicle-to-everything (V2X).","PeriodicalId":375211,"journal":{"name":"2023 VTS Asia Pacific Wireless Communications Symposium (APWCS)","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134251755","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
Compensating Image Overlay QPSK Modulation by Dual Camera for Rolling Shutter-Based Screen Camera Communication 基于滚动快门的屏摄通信双摄像头补偿图像叠加QPSK调制
2023 VTS Asia Pacific Wireless Communications Symposium (APWCS) Pub Date : 2023-08-01 DOI: 10.1109/APWCS60142.2023.10233956
Hayate Ohtani, W. Chujo, Kentaro Kobayashi
{"title":"Compensating Image Overlay QPSK Modulation by Dual Camera for Rolling Shutter-Based Screen Camera Communication","authors":"Hayate Ohtani, W. Chujo, Kentaro Kobayashi","doi":"10.1109/APWCS60142.2023.10233956","DOIUrl":"https://doi.org/10.1109/APWCS60142.2023.10233956","url":null,"abstract":"Rolling shutter (RS)-based screen camera communication (SCC) has been studied to increase data rates. Among modulation schemes for RS-based SCC, phase shit keying (PSK) is most suitable for M-ary modulation. However, PSK is vulnerable to pixel value variations on the image overlay screen. A method has been proposed to compensate for the image overlay degradation of PSK modulation using dual camera. In this study, type of overlay standard image and the ratio of exposure time to symbol length are changed to demonstrate the effectiveness of compensating method using dual camera for quadrature PSK (QPSK) modulation. The compensation method using dual camera enabled to suppress mean square error of constellation points of QPSK modulation to a nearly constant value regardless of overlay image difficulty.","PeriodicalId":375211,"journal":{"name":"2023 VTS Asia Pacific Wireless Communications Symposium (APWCS)","volume":"126 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127398483","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
Attention-based Phase Shift Control for Multi-RIS-aided Systems 基于注意力的多ris辅助系统相移控制
2023 VTS Asia Pacific Wireless Communications Symposium (APWCS) Pub Date : 2023-08-01 DOI: 10.1109/APWCS60142.2023.10234064
Hyunsoo Kim, Geon-Woong Jung, B. Shim
{"title":"Attention-based Phase Shift Control for Multi-RIS-aided Systems","authors":"Hyunsoo Kim, Geon-Woong Jung, B. Shim","doi":"10.1109/APWCS60142.2023.10234064","DOIUrl":"https://doi.org/10.1109/APWCS60142.2023.10234064","url":null,"abstract":"To support extremely high data rates in 6G wireless networks, reconfigurable intelligent surface (RIS) assisted communications have gained much attention in recent years. By controlling the phase shift of each reflecting element, the RIS can proactively modify the wireless propagation environment, thereby improving the signal quality for mmWave/THz systems. One important problem of multi-RIS-aided systems is that accurate channel estimation is difficult due to the heavy pilot overhead. In this paper, we propose a deep learning (DL)-based multi-RIS codeword selection scheme that selects multi-RIS codewords maximizing the sum rate of multi-RIS-aided systems. Specifically, we exploit the attention technique to calculate the impact of each RIS on the UE and emphasize the important reflected channels for multi-RIS codeword selection. From the simulation results, we demonstrate that the proposed scheme outperforms the benchmark schemes by a large margin.","PeriodicalId":375211,"journal":{"name":"2023 VTS Asia Pacific Wireless Communications Symposium (APWCS)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126079378","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
BLER Performance of Carrier Frequency Offset Compensation and Channel Estimation Methods Using Synchronization Signals for NR PBCH 基于同步信号的NR PBCH载波频偏补偿和信道估计方法的BLER性能
2023 VTS Asia Pacific Wireless Communications Symposium (APWCS) Pub Date : 2023-08-01 DOI: 10.1109/APWCS60142.2023.10233957
Takashi Ohiwa, Shun Yoneda, M. Sawahashi, Satoshi Nagata
{"title":"BLER Performance of Carrier Frequency Offset Compensation and Channel Estimation Methods Using Synchronization Signals for NR PBCH","authors":"Takashi Ohiwa, Shun Yoneda, M. Sawahashi, Satoshi Nagata","doi":"10.1109/APWCS60142.2023.10233957","DOIUrl":"https://doi.org/10.1109/APWCS60142.2023.10233957","url":null,"abstract":"This paper proposes estimation methods for carrier frequency offset (CFO) and channel response using synchronization signals for the Physical Broad-cast Channel (PBCH) of the 3GPP New Radio (NR) specifications. In the proposed methods, we estimate and compensate the CFO of the received PBCH by employing the primary synchronization signal (PSS) followed by estimation of the channel response using the demodulation reference signal (DMRS) and the secondary synchronization signal (SSS). Simulation results show that the proposed CFO estimation method achieves almost the identical average block error rate (BLER) for the PBCH as that without CFO. We also show that the channel estimation method using the DMRS and SSS decreases the required average received SNR at the average BLER of $10^{-3}$ by approximately 0.4 dB compared to that with only the DMRS. Finally, we show the effect of successive cancellation (SC) decoding and cyclic redundancy check (CRC)-aided successive cancellation list (CA-SCL) decoding on the BLER of the PBCH with a low polar coding rate.","PeriodicalId":375211,"journal":{"name":"2023 VTS Asia Pacific Wireless Communications Symposium (APWCS)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130309488","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
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