Pub Date : 2017-03-14DOI: 10.1109/WISNET.2017.7878759
N. Kurihara, K. Ujihara, F. Maehara
This paper proposes a simple coordinated multipoint (CoMP) transmission method for taxi radio systems in order to prevent inter-cell interference (ICI) without a significant renewal of facilities. The proposed method takes advantage of the interesting property that the ICI which is essential for CoMP can be represented by the communication distance easily obtained from vehicle position information in a 2-cells scenario. Moreover, the proposed approach can be adopted for more than 3 cells by combining the ICI between 2 cells. The proposed method exploits diversity reception in the case of time division multiplexing (TDM), which makes it possible to improve the channel capacity in overlapped area. The effectiveness of the proposed method is demonstrated in comparison with the case of no coordination (w/o CoMP) under the practical scenario based on the taxi radio system in Japan.
{"title":"A simple CoMP transmission method employing vehicle position information for taxi radio systems","authors":"N. Kurihara, K. Ujihara, F. Maehara","doi":"10.1109/WISNET.2017.7878759","DOIUrl":"https://doi.org/10.1109/WISNET.2017.7878759","url":null,"abstract":"This paper proposes a simple coordinated multipoint (CoMP) transmission method for taxi radio systems in order to prevent inter-cell interference (ICI) without a significant renewal of facilities. The proposed method takes advantage of the interesting property that the ICI which is essential for CoMP can be represented by the communication distance easily obtained from vehicle position information in a 2-cells scenario. Moreover, the proposed approach can be adopted for more than 3 cells by combining the ICI between 2 cells. The proposed method exploits diversity reception in the case of time division multiplexing (TDM), which makes it possible to improve the channel capacity in overlapped area. The effectiveness of the proposed method is demonstrated in comparison with the case of no coordination (w/o CoMP) under the practical scenario based on the taxi radio system in Japan.","PeriodicalId":266973,"journal":{"name":"2017 IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133213330","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 : 1900-01-01DOI: 10.1109/WISNET.2017.7878757
V. Palazzi, C. Kalialakis, F. Alimenti, P. Mezzanotte, L. Roselli, A. Collado, A. Georgiadis
In this paper the experimental results of a compact low-power rectenna in paper substrate, designed to operate in the Wi-Fi band, are presented. The complete prototype, based on an annular slot antenna and a single-diode rectifier, features a weight of 1.5 grams and shows an RF-to-dc conversion efficiency in the design band of about 40 % for a −10 dBm available input power, of about 28 % at −15 dBm, and in the range [10, 22] % at −20 dBm, corresponding to an output DC voltage in the order of 320, 240 and 60 mV respectively. Additionally, the rectenna features an efficiency higher then 7 % in the whole band 1.8–2.7 dBm for a power density estimated around 3 µW/cm2.
{"title":"Performance analysis of a ultra-compact low-power rectenna in paper substrate for RF energy harvesting","authors":"V. Palazzi, C. Kalialakis, F. Alimenti, P. Mezzanotte, L. Roselli, A. Collado, A. Georgiadis","doi":"10.1109/WISNET.2017.7878757","DOIUrl":"https://doi.org/10.1109/WISNET.2017.7878757","url":null,"abstract":"In this paper the experimental results of a compact low-power rectenna in paper substrate, designed to operate in the Wi-Fi band, are presented. The complete prototype, based on an annular slot antenna and a single-diode rectifier, features a weight of 1.5 grams and shows an RF-to-dc conversion efficiency in the design band of about 40 % for a −10 dBm available input power, of about 28 % at −15 dBm, and in the range [10, 22] % at −20 dBm, corresponding to an output DC voltage in the order of 320, 240 and 60 mV respectively. Additionally, the rectenna features an efficiency higher then 7 % in the whole band 1.8–2.7 dBm for a power density estimated around 3 µW/cm2.","PeriodicalId":266973,"journal":{"name":"2017 IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116757562","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 : 1900-01-01DOI: 10.1109/WISNET.2017.7878758
F. Pflaum, S. Erhardt, R. Weigel, A. Koelpin
In this paper a new approach to localization of mobile nodes in wireless sensor networks is presented which utilizes the measurement of the received signal strength indicator by multiple receivers concentrated in a small area and applies the technique of linear discriminant analysis to the received data. The concept of gathering all receivers at a single spot provides great flexibility, while good spatial resolution is still achieved. This is demonstrated by a test network operating in the sub-GHz-range around 868 MHz.
{"title":"RSSI-based localization with minimal infrastructure using multivariate statistic techniques","authors":"F. Pflaum, S. Erhardt, R. Weigel, A. Koelpin","doi":"10.1109/WISNET.2017.7878758","DOIUrl":"https://doi.org/10.1109/WISNET.2017.7878758","url":null,"abstract":"In this paper a new approach to localization of mobile nodes in wireless sensor networks is presented which utilizes the measurement of the received signal strength indicator by multiple receivers concentrated in a small area and applies the technique of linear discriminant analysis to the received data. The concept of gathering all receivers at a single spot provides great flexibility, while good spatial resolution is still achieved. This is demonstrated by a test network operating in the sub-GHz-range around 868 MHz.","PeriodicalId":266973,"journal":{"name":"2017 IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132070727","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 : 1900-01-01DOI: 10.1109/WISNET.2017.7878746
Christoph Will, S. Linz, S. Mann, F. Lurz, S. Lindner, R. Weigel, A. Koelpin
Six-Port microwave interferometers are a low-cost as well as low-power type of radar sensor with a high phase accuracy, which can be used for precise displacement measurements. Near field effects strongly influence the signal characteristics of a reflection of the electromagnetic wave near the antenna, especially if the target is low reflective. In this paper a calibration procedure based on phase error correction by segmental polynomial approximation is proposed that utilizes these effects. After validating the functionality of the calibration algorithm and its improvement by comparison to a comparable state-of-the-art procedure, two further near field measurements are presented. A cardboard as well as a plastic plate are used as low reflecting targets to show the applicability of the proposed calibration procedure for diverse measurement scenarios.
{"title":"Segmental polynomial approximation based phase error correction for precise near field displacement measurements using Six-Port microwave interferometers","authors":"Christoph Will, S. Linz, S. Mann, F. Lurz, S. Lindner, R. Weigel, A. Koelpin","doi":"10.1109/WISNET.2017.7878746","DOIUrl":"https://doi.org/10.1109/WISNET.2017.7878746","url":null,"abstract":"Six-Port microwave interferometers are a low-cost as well as low-power type of radar sensor with a high phase accuracy, which can be used for precise displacement measurements. Near field effects strongly influence the signal characteristics of a reflection of the electromagnetic wave near the antenna, especially if the target is low reflective. In this paper a calibration procedure based on phase error correction by segmental polynomial approximation is proposed that utilizes these effects. After validating the functionality of the calibration algorithm and its improvement by comparison to a comparable state-of-the-art procedure, two further near field measurements are presented. A cardboard as well as a plastic plate are used as low reflecting targets to show the applicability of the proposed calibration procedure for diverse measurement scenarios.","PeriodicalId":266973,"journal":{"name":"2017 IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132938043","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 : 1900-01-01DOI: 10.1109/WISNET.2017.7878748
C. Hannachi, E. Moldovan, S. Tatu
Performance analysis of a millimeter-wave direct conversion receiver (homodyne), based on the measurement results of recently fabricated V-band six-port circuit, is presented in this paper. In order to obtain realistic and accurate system simulation results, the model of the six-port demodulator is implemented using the powerful schematic platform of Keysight's Advanced Design System (ADS) and the measured S-parameters of the fabricated six-port. The performances of the six-port based direct conversion receiver model are assessed in terms of various PSK/QAM modulated signals, and Error Vector Magnitude (EVM) for different local-oscillator (LO) and RF power levels. The obtained results demonstrate that the six-port demodulator is a serious candidate for the homodyne receivers suited to the future 5G short-range wireless communication systems.
{"title":"An improved-performance V-band six-port receiver for future 5G short-range wireless communications","authors":"C. Hannachi, E. Moldovan, S. Tatu","doi":"10.1109/WISNET.2017.7878748","DOIUrl":"https://doi.org/10.1109/WISNET.2017.7878748","url":null,"abstract":"Performance analysis of a millimeter-wave direct conversion receiver (homodyne), based on the measurement results of recently fabricated V-band six-port circuit, is presented in this paper. In order to obtain realistic and accurate system simulation results, the model of the six-port demodulator is implemented using the powerful schematic platform of Keysight's Advanced Design System (ADS) and the measured S-parameters of the fabricated six-port. The performances of the six-port based direct conversion receiver model are assessed in terms of various PSK/QAM modulated signals, and Error Vector Magnitude (EVM) for different local-oscillator (LO) and RF power levels. The obtained results demonstrate that the six-port demodulator is a serious candidate for the homodyne receivers suited to the future 5G short-range wireless communication systems.","PeriodicalId":266973,"journal":{"name":"2017 IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126771625","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 : 1900-01-01DOI: 10.1109/WISNET.2017.7878752
Joshua F. Ensworth, A. T. Hoang, Thang Q. Phu, M. Reynolds
We present the first demonstration of a monostatic full-duplex backscatter system having a carrier source co-located with a commercial Bluetooth chipset. The system permits the co-location and simultaneous operation of a commercial Bluetooth chipset with a carrier source, enabling the use of specially designed BLE-Backscatter tags to send data to the commercial Bluetooth chipset with no software modifications. This demonstration shows the potential for reusing the wireless chipsets in future full-duplex devices as readers for backscatter tags and other backscatter-based devices. Using a directional coupler-based carrier cancellation implementation, we achieve carrier suppression of 50 dB. In an over-the-air experiment using a dipole antenna with 2.1 dBi gain, we observe a read range of 3 meters with an 88% packet success rate at a carrier power of +33.9 dBm.
{"title":"Full-duplex Bluetooth Low Energy (BLE) compatible Backscatter communication system for mobile devices","authors":"Joshua F. Ensworth, A. T. Hoang, Thang Q. Phu, M. Reynolds","doi":"10.1109/WISNET.2017.7878752","DOIUrl":"https://doi.org/10.1109/WISNET.2017.7878752","url":null,"abstract":"We present the first demonstration of a monostatic full-duplex backscatter system having a carrier source co-located with a commercial Bluetooth chipset. The system permits the co-location and simultaneous operation of a commercial Bluetooth chipset with a carrier source, enabling the use of specially designed BLE-Backscatter tags to send data to the commercial Bluetooth chipset with no software modifications. This demonstration shows the potential for reusing the wireless chipsets in future full-duplex devices as readers for backscatter tags and other backscatter-based devices. Using a directional coupler-based carrier cancellation implementation, we achieve carrier suppression of 50 dB. In an over-the-air experiment using a dipole antenna with 2.1 dBi gain, we observe a read range of 3 meters with an 88% packet success rate at a carrier power of +33.9 dBm.","PeriodicalId":266973,"journal":{"name":"2017 IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132405537","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 : 1900-01-01DOI: 10.1109/WISNET.2017.7878742
J. Muñoz-Ferreras, Zhengyu Peng, R. Gómez‐García, Changzhi Li
Short-range radars are becoming important RF systems in plenty of wireless-sensing applications, such as those in industrial, transportation, security, health, and commercial scenarios. Doppler sensors are very sensitive to vibrations, whereas frequency-modulated continuous-wave (FMCW) radars enable absolute-range discrimination. This article proposes a compact low-cost radar architecture that multiplexes in frequency both operation modes. Furthermore, a theoretical analysis which emphasizes the spectral features of the received baseband signal is included. Simulation results for a K-band hybrid radar example are also provided to validate the expounded mathematical framework.
{"title":"A frequency-multiplexed Doppler-plus-FMCW hybrid radar architecture: Theory and simulations","authors":"J. Muñoz-Ferreras, Zhengyu Peng, R. Gómez‐García, Changzhi Li","doi":"10.1109/WISNET.2017.7878742","DOIUrl":"https://doi.org/10.1109/WISNET.2017.7878742","url":null,"abstract":"Short-range radars are becoming important RF systems in plenty of wireless-sensing applications, such as those in industrial, transportation, security, health, and commercial scenarios. Doppler sensors are very sensitive to vibrations, whereas frequency-modulated continuous-wave (FMCW) radars enable absolute-range discrimination. This article proposes a compact low-cost radar architecture that multiplexes in frequency both operation modes. Furthermore, a theoretical analysis which emphasizes the spectral features of the received baseband signal is included. Simulation results for a K-band hybrid radar example are also provided to validate the expounded mathematical framework.","PeriodicalId":266973,"journal":{"name":"2017 IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116870409","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 : 1900-01-01DOI: 10.1109/WISNET.2017.7878743
S. Scherr, Rifat Afroz, S. Ayhan, Sven Thomas, T. Jaeschke, M. Pauli, N. Pohl, T. Zwick
Distance sensing tasks in micromachine tools need to be performed with micrometer accuracy. For such tasks, FMCW radars with a combination of frequency and phase evaluations are a good choice. However, the accuracy cannot be freely increased as there are constraints on the target size and placement imposed by the limited space inside micromachines. This paper investigates the influence of target geometry and position on the accuracy of its range estimation using a W-band FMCW radar. A relation between target geometry and accuracy is established through Cramér Rao Lower Bound (CRLB). Based on the measurements of different targets, an optimal shape and size is proposed which provides an average accuracy in the single digit micrometer range. In addition, antenna field regions are analyzed for suitable target placements.
{"title":"Target evaluation for high accuracy 80 GHz FMCW radar distance measurements","authors":"S. Scherr, Rifat Afroz, S. Ayhan, Sven Thomas, T. Jaeschke, M. Pauli, N. Pohl, T. Zwick","doi":"10.1109/WISNET.2017.7878743","DOIUrl":"https://doi.org/10.1109/WISNET.2017.7878743","url":null,"abstract":"Distance sensing tasks in micromachine tools need to be performed with micrometer accuracy. For such tasks, FMCW radars with a combination of frequency and phase evaluations are a good choice. However, the accuracy cannot be freely increased as there are constraints on the target size and placement imposed by the limited space inside micromachines. This paper investigates the influence of target geometry and position on the accuracy of its range estimation using a W-band FMCW radar. A relation between target geometry and accuracy is established through Cramér Rao Lower Bound (CRLB). Based on the measurements of different targets, an optimal shape and size is proposed which provides an average accuracy in the single digit micrometer range. In addition, antenna field regions are analyzed for suitable target placements.","PeriodicalId":266973,"journal":{"name":"2017 IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125600669","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 : 1900-01-01DOI: 10.1109/WISNET.2017.7878755
Keiji Jimi, I. Matsunami
Random stepped FM radar that transmits random frequency narrowband pulses can avoid interference between adjacent radar systems. The random stepped FM radar also offers spectrum hole since it consists of independent pulses with different frequency. Thus it is expected to coexist with the existing radar systems. In this paper, we propose to adopt Khatri-Rao product array processing to spectrum hole compensation.
{"title":"A novel spectrum hole compensation using Khatri-Rao product array processing on random stepped FM radar","authors":"Keiji Jimi, I. Matsunami","doi":"10.1109/WISNET.2017.7878755","DOIUrl":"https://doi.org/10.1109/WISNET.2017.7878755","url":null,"abstract":"Random stepped FM radar that transmits random frequency narrowband pulses can avoid interference between adjacent radar systems. The random stepped FM radar also offers spectrum hole since it consists of independent pulses with different frequency. Thus it is expected to coexist with the existing radar systems. In this paper, we propose to adopt Khatri-Rao product array processing to spectrum hole compensation.","PeriodicalId":266973,"journal":{"name":"2017 IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128506538","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 : 1900-01-01DOI: 10.1109/WISNET.2017.7878741
J. Muñoz-Ferreras, Zhengyu Peng, Yao Tang, R. Gómez‐García, Changzhi Li
Non-contact radar-based monitoring of large mechanical constructions is currently gaining much attention from the RF/microwave community. In particular, Doppler radars can be coherently exploited to extract spectrograms—i.e., time-Doppler maps—of industrial-type wind turbines. This work conducts short-range experiments corresponding to a 50-m-height Vestas wind turbine illuminated by two custom-designed quadrature radar prototypes operating at 5.8 and 24 GHz, respectively. It is observed that the obtained experimental radar signatures—that are shaped by flashes and quasi-sinusoidal halos—exhibit distinct characteristics depending on the acquisition geometry and the operation frequency of the radar sensor. These features might lead in the future to a radar-based non-contact monitoring solution of the structural health of industrial-type wind turbines.
{"title":"Doppler-radar-based short-range acquisitions of time-frequency signatures from an industrial-type wind turbine","authors":"J. Muñoz-Ferreras, Zhengyu Peng, Yao Tang, R. Gómez‐García, Changzhi Li","doi":"10.1109/WISNET.2017.7878741","DOIUrl":"https://doi.org/10.1109/WISNET.2017.7878741","url":null,"abstract":"Non-contact radar-based monitoring of large mechanical constructions is currently gaining much attention from the RF/microwave community. In particular, Doppler radars can be coherently exploited to extract spectrograms—i.e., time-Doppler maps—of industrial-type wind turbines. This work conducts short-range experiments corresponding to a 50-m-height Vestas wind turbine illuminated by two custom-designed quadrature radar prototypes operating at 5.8 and 24 GHz, respectively. It is observed that the obtained experimental radar signatures—that are shaped by flashes and quasi-sinusoidal halos—exhibit distinct characteristics depending on the acquisition geometry and the operation frequency of the radar sensor. These features might lead in the future to a radar-based non-contact monitoring solution of the structural health of industrial-type wind turbines.","PeriodicalId":266973,"journal":{"name":"2017 IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130631374","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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