Pub Date : 2020-04-28DOI: 10.19729/J.CNKI.1673-5188.2018.04.007
Zhang Shuang, Zhang Ningbo, Kang Guixia
{"title":"Energy Efficiency for NPUSCH in NB-IoT with Guard Band","authors":"Zhang Shuang, Zhang Ningbo, Kang Guixia","doi":"10.19729/J.CNKI.1673-5188.2018.04.007","DOIUrl":"https://doi.org/10.19729/J.CNKI.1673-5188.2018.04.007","url":null,"abstract":"","PeriodicalId":61991,"journal":{"name":"ZTE Communications","volume":"16 1","pages":"46-51"},"PeriodicalIF":0.0,"publicationDate":"2020-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49102944","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}
Antenna mechanical pose measurement has always been a crucial issue for radio frequency (RF) engineers, owning to the need for mechanical pose adjustment to satisfy the chang⁃ ing surroundings. Traditionally, the pose is estimated in the contact way with the help of many kinds of measuring equip⁃ ment, but the measurement accuracy cannot be well assured in this way. We propose a non ⁃ contact measuring system based on Structure from Motion (SfM) in the field of photo⁃ grammetry. The accurate pose would be estimated by only tak⁃ ing several images of the antenna and after some easy interac⁃ tion on the smartphone. Extensive experiments show that the error ranges of antenna’s downtilt and heading are within 2 degrees and 5 degrees respectively, with the shooting distance in 25 m. The GPS error is also under 5 meters with this shooting distance. We develop the measuring applications both in PC and android smartphones and the results can be computed within 3 minutes on both platforms. The proposed system is quite safe, convenient and efficient for engineers to use in their daily work. To the best of our knowledge, this is the first pipeline that solves the antenna pose measuring prob⁃ lem by the photogrammetry method on the mobile platform.
{"title":"Antenna Mechanical Pose Measurement Based on Structure from Motion","authors":"Xu Kun, Guotian Fan, Zhou Yi, Haisheng Zhan, Zongyi Guo","doi":"10.19729/J.CNKI.1673-5188.2018.04.006","DOIUrl":"https://doi.org/10.19729/J.CNKI.1673-5188.2018.04.006","url":null,"abstract":"Antenna mechanical pose measurement has always been a crucial issue for radio frequency (RF) engineers, owning to the need for mechanical pose adjustment to satisfy the chang⁃ ing surroundings. Traditionally, the pose is estimated in the contact way with the help of many kinds of measuring equip⁃ ment, but the measurement accuracy cannot be well assured in this way. We propose a non ⁃ contact measuring system based on Structure from Motion (SfM) in the field of photo⁃ grammetry. The accurate pose would be estimated by only tak⁃ ing several images of the antenna and after some easy interac⁃ tion on the smartphone. Extensive experiments show that the error ranges of antenna’s downtilt and heading are within 2 degrees and 5 degrees respectively, with the shooting distance in 25 m. The GPS error is also under 5 meters with this shooting distance. We develop the measuring applications both in PC and android smartphones and the results can be computed within 3 minutes on both platforms. The proposed system is quite safe, convenient and efficient for engineers to use in their daily work. To the best of our knowledge, this is the first pipeline that solves the antenna pose measuring prob⁃ lem by the photogrammetry method on the mobile platform.","PeriodicalId":61991,"journal":{"name":"ZTE Communications","volume":"16 1","pages":"38-45"},"PeriodicalIF":0.0,"publicationDate":"2020-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49331974","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}
Pub Date : 2020-04-28DOI: 10.19729/J.CNKI.1673-5188.2018.04.008
Chen Shijun, Bai Qingsong, Chen Dawei, Sun Fuyu, H. Dong
We demonstrate an atmospheric transfer of microwave signal over a 120 m outdoor free⁃space link using a compact diode laser with a timing fluctuation suppression technique. Timing fluctuation and Allan Deviation are both measured to charac⁃ terize the instability of transferred frequency incurred during the transfer process. By transferring a 100 MHz microwave signal within 4500 s, the total root⁃mean⁃square (RMS) timing fluctuation was measured to be about 6 ps, with a fractional frequency instability on the order of 1 × 10−12 at 1 s, and order of 7 × 10−15 at 1000 s. This portable atmospheric fre⁃ quency transfer scheme with timing fluctuation suppression can be used to distribute an atomic clock ⁃ based frequency over a free⁃space link.
{"title":"Portable Atmospheric Transfer of Microwave Signal Using Diode Laser with Timing Fluctuation Suppression","authors":"Chen Shijun, Bai Qingsong, Chen Dawei, Sun Fuyu, H. Dong","doi":"10.19729/J.CNKI.1673-5188.2018.04.008","DOIUrl":"https://doi.org/10.19729/J.CNKI.1673-5188.2018.04.008","url":null,"abstract":"We demonstrate an atmospheric transfer of microwave signal over a 120 m outdoor free⁃space link using a compact diode laser with a timing fluctuation suppression technique. Timing fluctuation and Allan Deviation are both measured to charac⁃ terize the instability of transferred frequency incurred during the transfer process. By transferring a 100 MHz microwave signal within 4500 s, the total root⁃mean⁃square (RMS) timing fluctuation was measured to be about 6 ps, with a fractional frequency instability on the order of 1 × 10−12 at 1 s, and order of 7 × 10−15 at 1000 s. This portable atmospheric fre⁃ quency transfer scheme with timing fluctuation suppression can be used to distribute an atomic clock ⁃ based frequency over a free⁃space link.","PeriodicalId":61991,"journal":{"name":"ZTE Communications","volume":"16 1","pages":"52-56"},"PeriodicalIF":0.0,"publicationDate":"2020-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43786579","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}
Pub Date : 2020-04-16DOI: 10.3969/J.ISSN.1673-5188.2017.S2.003
Liang Minjia, Xie Lun, Wang Zhiliang, R. Fuji
{"title":"Emotion and Cognitive Reappraisal Based on GSR Wearable Sensor","authors":"Liang Minjia, Xie Lun, Wang Zhiliang, R. Fuji","doi":"10.3969/J.ISSN.1673-5188.2017.S2.003","DOIUrl":"https://doi.org/10.3969/J.ISSN.1673-5188.2017.S2.003","url":null,"abstract":"","PeriodicalId":61991,"journal":{"name":"ZTE Communications","volume":"15 1","pages":"18-22"},"PeriodicalIF":0.0,"publicationDate":"2020-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46479353","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}
Pub Date : 2020-04-16DOI: 10.3969/J.ISSN.1673-5188.2017.S2.007
Li Tai-hao, N. Tuya, Zhou Jianshe, R. Fuji, L. Shupeng
{"title":"An Improved K-Means Algorithm Based on Initial Clustering Center Optimization","authors":"Li Tai-hao, N. Tuya, Zhou Jianshe, R. Fuji, L. Shupeng","doi":"10.3969/J.ISSN.1673-5188.2017.S2.007","DOIUrl":"https://doi.org/10.3969/J.ISSN.1673-5188.2017.S2.007","url":null,"abstract":"","PeriodicalId":61991,"journal":{"name":"ZTE Communications","volume":"15 1","pages":"43-46"},"PeriodicalIF":0.0,"publicationDate":"2020-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43377223","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}
Pub Date : 2020-04-16DOI: 10.12142/ZTECOM.201904001
Jiang Wei, Luo Fa-long
{"title":"Editorial: Special Topic on Computational Radio Intelligence: One Key for 6G Wireless","authors":"Jiang Wei, Luo Fa-long","doi":"10.12142/ZTECOM.201904001","DOIUrl":"https://doi.org/10.12142/ZTECOM.201904001","url":null,"abstract":"","PeriodicalId":61991,"journal":{"name":"ZTE Communications","volume":"17 1","pages":"1-2"},"PeriodicalIF":0.0,"publicationDate":"2020-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46501928","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}
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