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2021 IEEE VTS 17th Asia Pacific Wireless Communications Symposium (APWCS)最新文献

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Quantum Scheduling for Millimeter-Wave Observation Satellite Constellation 毫米波观测卫星星座的量子调度
2021 IEEE VTS 17th Asia Pacific Wireless Communications Symposium (APWCS) Pub Date : 2021-08-01 DOI: 10.1109/APWCS50173.2021.9548770
Joongheon Kim, Yunseok Kwak, Soyi Jung, Jae-Hyun Kim
{"title":"Quantum Scheduling for Millimeter-Wave Observation Satellite Constellation","authors":"Joongheon Kim, Yunseok Kwak, Soyi Jung, Jae-Hyun Kim","doi":"10.1109/APWCS50173.2021.9548770","DOIUrl":"https://doi.org/10.1109/APWCS50173.2021.9548770","url":null,"abstract":"In beyond 5G and 6G network scenarios, the use of satellites has been actively discussed for extending target monitoring areas, even for extreme circumstances, where the monitoring functionalities can be realized due to the usage of millimeter-wave wireless links. This paper designs an efficient scheduling algorithm which minimizes overlapping monitoring areas among observation satellite constellation. In order to achieve this objective, a quantum optimization based algorithm is used because the overlapping can be mathematically modelled via a max-weight independent set (MWIS) problem which is one of well-known NP-hard problems.","PeriodicalId":164737,"journal":{"name":"2021 IEEE VTS 17th Asia Pacific Wireless Communications Symposium (APWCS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125355106","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: 8
Detection Probability of PRACH Preamble for NR in 3GPP TDL Channel Models 3GPP TDL信道模型中NR PRACH前导的检测概率
2021 IEEE VTS 17th Asia Pacific Wireless Communications Symposium (APWCS) Pub Date : 2021-08-01 DOI: 10.1109/APWCS50173.2021.9548751
Kosuke Kamata, M. Sawahashi, Y. Kishiyama
{"title":"Detection Probability of PRACH Preamble for NR in 3GPP TDL Channel Models","authors":"Kosuke Kamata, M. Sawahashi, Y. Kishiyama","doi":"10.1109/APWCS50173.2021.9548751","DOIUrl":"https://doi.org/10.1109/APWCS50173.2021.9548751","url":null,"abstract":"This paper presents the preamble detection probability for the Physical Random Access Channel (PRACH) with a long sequence based on the New Radio (NR) radio interface for five Tapped Delay Line (TDL) channel models by the 3rd generation partnership project (3GPP). Computer simulation results validate the PRACH detection probabilities of three non-line-of-sight (NLOS) and two LOS TDL channel models from the features of the respective power delay profiles. We show that PRACH Format 1 achieves a higher PRACH detection probability than that for Format 0 due to the repetition effect of the preamble sequence in a very low average received signal-to-noise (SNR) region. We also show that PRACH Formats 2 and 3 decrease the required average received SNR that satisfies the target PRACH detection probability by approximately 4.5 dB - 5.0 dB compared to that for Format 0. Finally, we show that when multiple PRACHs are transmitted simultaneously allowing contention, the impact of the cross-correlation among the PRACHs is low and that a high PRACH detection probability is achieved even in a low average received SNR region.","PeriodicalId":164737,"journal":{"name":"2021 IEEE VTS 17th Asia Pacific Wireless Communications Symposium (APWCS)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133538088","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: 1
Application of random forest to classify weather observation into rainfall using GNSS receiver 随机森林在GNSS接收机降雨天气观测分类中的应用
2021 IEEE VTS 17th Asia Pacific Wireless Communications Symposium (APWCS) Pub Date : 2021-08-01 DOI: 10.1109/APWCS50173.2021.9548772
Y. Nakagawa, Taiki Miyauchi, T. Higashino, M. Okada
{"title":"Application of random forest to classify weather observation into rainfall using GNSS receiver","authors":"Y. Nakagawa, Taiki Miyauchi, T. Higashino, M. Okada","doi":"10.1109/APWCS50173.2021.9548772","DOIUrl":"https://doi.org/10.1109/APWCS50173.2021.9548772","url":null,"abstract":"In the GNSS meteorology, it is known that the zenith total delay time obtained from the positioning process in GNSS receivers is showing potential rainfall intensity, however, its precision for rainfall nowcasting is not practically high due to high false alarm. In order to enhance the precision of rainfall nowcasting, this paper employs sensor fusion for collecting various kind of information obtained from not only GNSS but also meteorological sensor. A machine learning technique is employed to classify many weather conditions into precipitation or not. In this paper, the classification performance is investigated as the random forest algorithm is applied for binary classification. Better performance can be obtained and the seasonal difference is clearly shown compared to without using a sensor fusion technique.","PeriodicalId":164737,"journal":{"name":"2021 IEEE VTS 17th Asia Pacific Wireless Communications Symposium (APWCS)","volume":"10 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132207720","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: 1
Bridging the Gap Between Academia and Industry: MOST 6G Research Program in Taiwan 缩小学术界与产业界之间的差距:台湾MOST 6G研究计划
2021 IEEE VTS 17th Asia Pacific Wireless Communications Symposium (APWCS) Pub Date : 2021-08-01 DOI: 10.1109/APWCS50173.2021.9548775
Hung-Yu Wei, Yao-Win Peter Hong, W. Shay, Tzong-Lin Wu
{"title":"Bridging the Gap Between Academia and Industry: MOST 6G Research Program in Taiwan","authors":"Hung-Yu Wei, Yao-Win Peter Hong, W. Shay, Tzong-Lin Wu","doi":"10.1109/APWCS50173.2021.9548775","DOIUrl":"https://doi.org/10.1109/APWCS50173.2021.9548775","url":null,"abstract":"The Ministry of Science and Technology (MOST) of Taiwan recently kicks off a national research program on 6G wireless. Aiming at the future technical needs of Taiwan’s telecommunications industry, the research program will develop breakthrough technologies, introduce collaboration with domestic manufacturers, fill up critical technological gaps, and assist the future development of the telecommunications industry. The goal is to integrate academic research closely with industrial R&D. The research program will explore the 6G roadmap for Taiwan’s telecommunications industry. Additionally, we encourage research cooperation with international research teams and cultivate telecommunications talents. At the same time, project participants could collaborate with companies and research institutes to jointly participate in international standards and expand the impact of 6G advancement.","PeriodicalId":164737,"journal":{"name":"2021 IEEE VTS 17th Asia Pacific Wireless Communications Symposium (APWCS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134193437","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
BER of LDPC-Coded Single-Carrier LOS-MIMO Using FDE in 3GPP TDL Channel Models 在3GPP TDL信道模型中使用FDE的ldpc编码单载波LOS-MIMO的误码率
2021 IEEE VTS 17th Asia Pacific Wireless Communications Symposium (APWCS) Pub Date : 2021-08-01 DOI: 10.1109/APWCS50173.2021.9548760
Aiki Hara, Kana Aono, M. Sawahashi, N. Kamiya
{"title":"BER of LDPC-Coded Single-Carrier LOS-MIMO Using FDE in 3GPP TDL Channel Models","authors":"Aiki Hara, Kana Aono, M. Sawahashi, N. Kamiya","doi":"10.1109/APWCS50173.2021.9548760","DOIUrl":"https://doi.org/10.1109/APWCS50173.2021.9548760","url":null,"abstract":"The application of line-of-sight (LOS)- multiple-input multiple-output (MIMO) to the back-haul or fronthaul between a macro-cell and small cells is promising from the viewpoint of low-cost deployment in 4G and 5G cellular heterogeneous networks. This paper presents the bit error rate (BER) performance of low-density parity-check (LDPC)-coded single-carrier 2 × 2 LOS-MIMO using frequency domain equalization (FDE) in the 3rd generation partnership project (3GPP) tapped delay line (TDL) channel models. Computer simulation results show that the average BER of less than 10−8 is achieved with the LDPC coding rate of R = 1/2 or lower in TDL-D and E channel models with the number of non-line-of-sight (NLOS) delayed paths of LNLOS = 13 and 14, that suffer from independent Rayleigh fading. Moreover, we show that high quality such as the average BER of 10−8 is achieved for LDPC- coded 2 × 2 LOS-MIMO using FDE when LNLOS is equal to five or fewer even with the high coding rate of 8/9 in the TDL-E channel model.","PeriodicalId":164737,"journal":{"name":"2021 IEEE VTS 17th Asia Pacific Wireless Communications Symposium (APWCS)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114684980","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 Theoretical Study on Suboptimal Joint Transmit-Receive Diversity In Correlated Rayleigh Fading Channels 相关瑞利衰落信道次优联合收发分集的理论研究
2021 IEEE VTS 17th Asia Pacific Wireless Communications Symposium (APWCS) Pub Date : 2021-08-01 DOI: 10.1109/APWCS50173.2021.9548716
F. Adachi, R. Takahashi
{"title":"A Theoretical Study on Suboptimal Joint Transmit-Receive Diversity In Correlated Rayleigh Fading Channels","authors":"F. Adachi, R. Takahashi","doi":"10.1109/APWCS50173.2021.9548716","DOIUrl":"https://doi.org/10.1109/APWCS50173.2021.9548716","url":null,"abstract":"In optimal joint transmit-receive diversity (JTRD), transmitter and receiver jointly optimize their diversity weight vectors so as to maximize the transmission performance. In this paper, suboptimal JTRD is considered, in which the receiver determines its diversity weight vector first and then, transmitter optimizes its diversity weight vector to maximize the resultant composite channel gain for the given receiver diversity weight vector. Closed-form expressions are derived for the distribution of received signal-to-noise ratio (SNR) in correlated Rayleigh fading channels. It is shown by Monte-Carlo numerical evaluation using the derived closed-form SNR distribution that the fading correlation does not necessarily degrade the transmission performance and can improve it compared to the case of uncorrelated Rayleigh fading channels.","PeriodicalId":164737,"journal":{"name":"2021 IEEE VTS 17th Asia Pacific Wireless Communications Symposium (APWCS)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129606540","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: 1
Millimeter-Wave Base Station Cooperation Technologies for High-Mobility Environments 面向高移动环境的毫米波基站协作技术
2021 IEEE VTS 17th Asia Pacific Wireless Communications Symposium (APWCS) Pub Date : 2021-08-01 DOI: 10.1109/APWCS50173.2021.9548717
Tatsuki Okuyama, S. Suyama, Nobuhide Nonaka, T. Asai
{"title":"Millimeter-Wave Base Station Cooperation Technologies for High-Mobility Environments","authors":"Tatsuki Okuyama, S. Suyama, Nobuhide Nonaka, T. Asai","doi":"10.1109/APWCS50173.2021.9548717","DOIUrl":"https://doi.org/10.1109/APWCS50173.2021.9548717","url":null,"abstract":"5G communication introduces analog beamforming (BF) using massive MIMO (M-MIMO) in millimeter-wave (mmW) bands. 5G evolution, which will be actualized around 2025, replaces analog BF with hybrid or fully digital BF that improves mmW-band downlink and uplink transmission performances. In addition, cooperation technologies among of multiple base stations (BSs) are required to provide stable and reliable while cell switching in the mmW bands, even when mobile stations (MSs) travel at high speed. This paper verifies effectiveness of proposed BS cooperation technologies by both computer simulations and outdoor experimental trials. In this paper, three BSs using digital BF are cooperated to transmit signals while orthogonalizing two MSs that move at velocity of 90 km/h simultaneously. These evaluation shows that BS cooperation maintains the higher throughput in a wider area than non-BS cooperation.","PeriodicalId":164737,"journal":{"name":"2021 IEEE VTS 17th Asia Pacific Wireless Communications Symposium (APWCS)","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128326423","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
Downlink Channel Estimation Based on Multipath Separation in an FDD MIMO System 基于多径分离的FDD MIMO系统下行信道估计
2021 IEEE VTS 17th Asia Pacific Wireless Communications Symposium (APWCS) Pub Date : 2021-08-01 DOI: 10.1109/APWCS50173.2021.9548773
Shiori Tosaka, T. Nishimura, T. Ohgane, Y. Ogawa, J. Hagiwara, Takanori Sato
{"title":"Downlink Channel Estimation Based on Multipath Separation in an FDD MIMO System","authors":"Shiori Tosaka, T. Nishimura, T. Ohgane, Y. Ogawa, J. Hagiwara, Takanori Sato","doi":"10.1109/APWCS50173.2021.9548773","DOIUrl":"https://doi.org/10.1109/APWCS50173.2021.9548773","url":null,"abstract":"Although TDD has been mainly considered for massive MIMO systems, many traditional systems have been operating in FDD, and FDD may generally be more effective for delay-sensitive applications. In this paper, we present downlink channel acquisition with a few pilot symbols. At a base station (BS), we estimate delays and angles-of-arrival (AOAs) of multipath components using a compressed sensing technique. The BS transmits pilot symbols from a single antenna or two, and user equipment (UE) feeds back the downlink channels to the BS. Using the delays, AOAs, and the downlink channels fed back from the UE, we estimate all the remaining downlink channels. It is shown that the proposed method reveals excellent downlink channel estimation performance.","PeriodicalId":164737,"journal":{"name":"2021 IEEE VTS 17th Asia Pacific Wireless Communications Symposium (APWCS)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128100495","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: 1
Cooperative Communications Based on Harmonic Means of Channel Responses 基于信道响应谐波手段的协同通信
2021 IEEE VTS 17th Asia Pacific Wireless Communications Symposium (APWCS) Pub Date : 2021-08-01 DOI: 10.1109/APWCS50173.2021.9548722
S. Lin, M. Chang
{"title":"Cooperative Communications Based on Harmonic Means of Channel Responses","authors":"S. Lin, M. Chang","doi":"10.1109/APWCS50173.2021.9548722","DOIUrl":"https://doi.org/10.1109/APWCS50173.2021.9548722","url":null,"abstract":"In the cooperative communication, the destination node combines the received signals from source and relay nodes such that a better performance can be achieved due to diversity. However, the channel responses from the source to relay nodes also affect the combination effect at the destination. In this work, we apply the harmonic mean of the channel responses between source-relay and relay-destination to replace the original relay-destination channel response. The harmonic mean operation can reflect the overall effects of these two channels. With this we observe that the error rates in the destination can be reduced. We consider the schemes of maximum ratio combining (MRC) and the selection combining (SC) and the hybrid types. In these schemes, we all observe that with the harmonic mean of channel responses, better performance can be achieved.","PeriodicalId":164737,"journal":{"name":"2021 IEEE VTS 17th Asia Pacific Wireless Communications Symposium (APWCS)","volume":"2010 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125628842","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
Design of CycleGAN model for SAR image colorization SAR图像着色CycleGAN模型的设计
2021 IEEE VTS 17th Asia Pacific Wireless Communications Symposium (APWCS) Pub Date : 2021-08-01 DOI: 10.1109/APWCS50173.2021.9548749
Jung-Hoon Lee, Kyeongrok Kim, Jae-Hyun Kim
{"title":"Design of CycleGAN model for SAR image colorization","authors":"Jung-Hoon Lee, Kyeongrok Kim, Jae-Hyun Kim","doi":"10.1109/APWCS50173.2021.9548749","DOIUrl":"https://doi.org/10.1109/APWCS50173.2021.9548749","url":null,"abstract":"In deep learning based image processing, the number of dataset is important to train the designed model. However, it is hard to secure SAR images, because satellite-based SAR is limited and high-resolution images are very expensive. Generative adversarial network (GAN) supplements this problem by learning two models, generator and discriminator, in an adversarial process at the same time. In this paper, we take one dataset as input data, and compare its accuracy using GAN models. CycleGAN is used to generate images among GAN models. Optical images are used for dataset and Chinese cities are selected for SAR images. The lack of dataset, a drawback of SAR images, is supplemented using data augmentation. SSIM, MSE, and PSNR of fake and original images are calculated using dataset and show that CycleGAN has the most lower MSE with 639.4379 and highest PSNR with 20.0728. Pix2pix has the most highest SSIM with 0.7842.","PeriodicalId":164737,"journal":{"name":"2021 IEEE VTS 17th Asia Pacific Wireless Communications Symposium (APWCS)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125668366","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: 2
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