Pub Date : 2010-01-10DOI: 10.1109/RWS.2010.5434138
M. Sharawi, O. Rawashdeh, D. Aloi
Unmanned Aerial Vehicles (UAV) are extensively being used in exploration, surveillance and military applications to collect data via special sensors and send the data back to a central station via wireless links. Printed antennas embedded in wing structures will eliminate the drag due to friction, and allow for extended load capability due to their extra light weight. In this work, we assess the performance of an embedded small size monopole antenna within the wing structure of a UAV and compare its performance in two environments with a standard wire type monopole inside the fuselage. Their performance is similar with an average difference of 6% in the open field test.
{"title":"Evaluation and field testing of an embedded antenna in a small UAV wing structure","authors":"M. Sharawi, O. Rawashdeh, D. Aloi","doi":"10.1109/RWS.2010.5434138","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434138","url":null,"abstract":"Unmanned Aerial Vehicles (UAV) are extensively being used in exploration, surveillance and military applications to collect data via special sensors and send the data back to a central station via wireless links. Printed antennas embedded in wing structures will eliminate the drag due to friction, and allow for extended load capability due to their extra light weight. In this work, we assess the performance of an embedded small size monopole antenna within the wing structure of a UAV and compare its performance in two environments with a standard wire type monopole inside the fuselage. Their performance is similar with an average difference of 6% in the open field test.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131697856","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 : 2010-01-10DOI: 10.1109/RWS.2010.5434139
J. Taylor, Z. Low, J. Casanova, Jenshan Lin
A wireless power system via magnetic induction that can deliver 32 W to a laptop is designed and fabricated. A 60% peak end-to-end regulated efficiency is achieved. A load detection scheme is also implemented, which detects when a device is placed on the transmitter and can shut down the system if faults are detected. The system eliminates the need to plug the laptop into AC power when running or charging.
{"title":"A wireless power station for laptop computers","authors":"J. Taylor, Z. Low, J. Casanova, Jenshan Lin","doi":"10.1109/RWS.2010.5434139","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434139","url":null,"abstract":"A wireless power system via magnetic induction that can deliver 32 W to a laptop is designed and fabricated. A 60% peak end-to-end regulated efficiency is achieved. A load detection scheme is also implemented, which detects when a device is placed on the transmitter and can shut down the system if faults are detected. The system eliminates the need to plug the laptop into AC power when running or charging.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116039710","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 : 2010-01-10DOI: 10.1109/RWS.2010.5434182
C. Feige, T. Ostertag, M. Loschonsky, L. Reindl
In this contribution a radar assisted method is presented for the search for persons buried e.g. in collapsed buildings. Classical detection technology covers borescopes and geophones in combination with K-9 units (search and rescue dogs) for search and rescue missions in ruins, detritus and cones of debris. An improved and time efficient approach for search of vital signs can be realized with UWB (ultra wide band) radar systems, where a very short wide band pulse is transmitted, or with continuous wave (CW) radar systems for measuring movements like respiration. But instead of searching these vital sings, the presented method aims for people carrying electronic RF-devices. The search for these electronic RF-devices can be assisted with pulse radar systems. Frequency filters of such devices can be exposed to a radar pulse near the filters' resonance frequency and an echo can be detected, which enables the localization of the device and hopefully of the owner, too.
{"title":"Radar assisted detection of passive electronic components","authors":"C. Feige, T. Ostertag, M. Loschonsky, L. Reindl","doi":"10.1109/RWS.2010.5434182","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434182","url":null,"abstract":"In this contribution a radar assisted method is presented for the search for persons buried e.g. in collapsed buildings. Classical detection technology covers borescopes and geophones in combination with K-9 units (search and rescue dogs) for search and rescue missions in ruins, detritus and cones of debris. An improved and time efficient approach for search of vital signs can be realized with UWB (ultra wide band) radar systems, where a very short wide band pulse is transmitted, or with continuous wave (CW) radar systems for measuring movements like respiration. But instead of searching these vital sings, the presented method aims for people carrying electronic RF-devices. The search for these electronic RF-devices can be assisted with pulse radar systems. Frequency filters of such devices can be exposed to a radar pulse near the filters' resonance frequency and an echo can be detected, which enables the localization of the device and hopefully of the owner, too.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115580838","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 : 2010-01-10DOI: 10.1109/RWS.2010.5434185
N. Constantin, M. El-Gamal
This paper presents an equations based approach for estimating the linearity requirements for the RF envelope detectors and the other circuit blocks typically found in the error signal path of an envelope feedback amplifier. The proposed equations are based on a three-tone excitation and a 5th degree power series representation of the nonlinearities in the RF power amplifier block, which allows estimating inter-modulation distortion within the feedback system using peak-to-average envelope voltage ratios that may be parameterized. The proposed approach for validating and optimizing the linearity performances of the envelope detectors in open loop conditions, as a function of feedback parameters and closed loop IMD goals, can be used to analyze envelope feedback systems during the design phase, and may be particularly helpful for circuit characterization independently of the simulation environment.
{"title":"A method for estimating the IMD performance requirements of circuit blocks in the error signal path of an envelope feedback amplifier","authors":"N. Constantin, M. El-Gamal","doi":"10.1109/RWS.2010.5434185","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434185","url":null,"abstract":"This paper presents an equations based approach for estimating the linearity requirements for the RF envelope detectors and the other circuit blocks typically found in the error signal path of an envelope feedback amplifier. The proposed equations are based on a three-tone excitation and a 5th degree power series representation of the nonlinearities in the RF power amplifier block, which allows estimating inter-modulation distortion within the feedback system using peak-to-average envelope voltage ratios that may be parameterized. The proposed approach for validating and optimizing the linearity performances of the envelope detectors in open loop conditions, as a function of feedback parameters and closed loop IMD goals, can be used to analyze envelope feedback systems during the design phase, and may be particularly helpful for circuit characterization independently of the simulation environment.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121514924","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 : 2010-01-10DOI: 10.1109/RWS.2010.5434145
Y. Toriyama, Kazuya Kojima, T. Taniguchi, Miao Zhang, J. Hirokawa
In preparation for achieving the millimeter-wave ultra-broadband wireless system aimed at seamless connection with the optical communication network, we have developed key devices such as baseband signal processing SoC (System-On-Chip) with the built-in ultrahigh-speed multi-level QAM (Quadrature amplitude modulation) modem (modulator and demodulator), SiGe I/Q quadrature modulator and demodulator MMIC (Microwave Monolithic Integrated Circuit), and GaAsHEMT frequency converter MMIC. We have also prototyped the micro-mini and ultra-broadband 38 GHz band point-to-point wireless system using TDD (Time Division Duplex) mode with dynamic bandwidth assignment that adopts the configurations of separate transmission and receiving antennas capitalizing on the characteristic of smaller antenna area in the millimeter-wave band to achieve the performance that the radio clock frequency is 200 MHz and the maximum effective throughput on 16QAM is 600 Mbps.
{"title":"Multi-level QAM single-carrier high-efficiency broadband wireless system for millimeter-wave applications","authors":"Y. Toriyama, Kazuya Kojima, T. Taniguchi, Miao Zhang, J. Hirokawa","doi":"10.1109/RWS.2010.5434145","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434145","url":null,"abstract":"In preparation for achieving the millimeter-wave ultra-broadband wireless system aimed at seamless connection with the optical communication network, we have developed key devices such as baseband signal processing SoC (System-On-Chip) with the built-in ultrahigh-speed multi-level QAM (Quadrature amplitude modulation) modem (modulator and demodulator), SiGe I/Q quadrature modulator and demodulator MMIC (Microwave Monolithic Integrated Circuit), and GaAsHEMT frequency converter MMIC. We have also prototyped the micro-mini and ultra-broadband 38 GHz band point-to-point wireless system using TDD (Time Division Duplex) mode with dynamic bandwidth assignment that adopts the configurations of separate transmission and receiving antennas capitalizing on the characteristic of smaller antenna area in the millimeter-wave band to achieve the performance that the radio clock frequency is 200 MHz and the maximum effective throughput on 16QAM is 600 Mbps.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"148 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124730750","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 : 2010-01-10DOI: 10.1109/RWS.2010.5434222
A. Katz, Brian Eggleston, D. McGee, J. MacDonald
A new UHF Solid State Power Amplifier (SSPA) has been developed for use in government mobile communications space programs. Predistortion linearization combined with high-voltage gallium nitride (GaN) FET technology allows the simultaneous achievement of both linearity and record high linear efficiency. This SSPA is capable of a peak power of more than 170 watts, but will be operated at a lower power (60 watts) to provide the reliability required for service in space and the linearity needed for WCDMA operation. A power added efficiency (PAE) of greater than 60 % was achieved at this operating point.
{"title":"UHF GaN SSPA for space applications","authors":"A. Katz, Brian Eggleston, D. McGee, J. MacDonald","doi":"10.1109/RWS.2010.5434222","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434222","url":null,"abstract":"A new UHF Solid State Power Amplifier (SSPA) has been developed for use in government mobile communications space programs. Predistortion linearization combined with high-voltage gallium nitride (GaN) FET technology allows the simultaneous achievement of both linearity and record high linear efficiency. This SSPA is capable of a peak power of more than 170 watts, but will be operated at a lower power (60 watts) to provide the reliability required for service in space and the linearity needed for WCDMA operation. A power added efficiency (PAE) of greater than 60 % was achieved at this operating point.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125395242","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 : 2010-01-10DOI: 10.1109/RWS.2010.5434199
K. Ohta, K. Ono, I. Matsunami, A. Kajiwara
Ultra-wideband impulse-radio (UWB-IR) has lately attracted considerable attention because of high range-resolution, penetration against blanket and clothes, low power spectral emission and so on. In medical care or geriatric health care facilities, therefore it is expected to detect the small movement of a resident such as breathing with a remote non-contact approach which is unique as compared with conventional sensors such as infra-red and narrow-band radio. This paper suggests a wireless motion sensor using UWB-IR, which detects various movements of a resident vacating a bedside, room or designated area. It can also monitor the resident's respiration rate in bed. In this paper the measurement was conducted for several scenarios and the usefulness is investigated. As a result, it is found to be useful for ant-wandering and respiratory monitoring.
{"title":"Wireless motion sensor using ultra-wideband impulse-radio","authors":"K. Ohta, K. Ono, I. Matsunami, A. Kajiwara","doi":"10.1109/RWS.2010.5434199","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434199","url":null,"abstract":"Ultra-wideband impulse-radio (UWB-IR) has lately attracted considerable attention because of high range-resolution, penetration against blanket and clothes, low power spectral emission and so on. In medical care or geriatric health care facilities, therefore it is expected to detect the small movement of a resident such as breathing with a remote non-contact approach which is unique as compared with conventional sensors such as infra-red and narrow-band radio. This paper suggests a wireless motion sensor using UWB-IR, which detects various movements of a resident vacating a bedside, room or designated area. It can also monitor the resident's respiration rate in bed. In this paper the measurement was conducted for several scenarios and the usefulness is investigated. As a result, it is found to be useful for ant-wandering and respiratory monitoring.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121733093","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 : 2010-01-10DOI: 10.1109/RWS.2010.5434235
Shinichi Watanabe, M. Saito, M. Okada
This paper proposes a simple positioning method for small devices based on direct sequence spread spectrum signal. The proposed scheme measures the sign of inner product between reference signal from a loop antenna and the delayed signal from the double loop antenna. Thus, it can identify the region where the receiver exists based on the inner product. Numerical results show that the area where the inner product becomes negative or positive is symmetric with respect to the position of the transmitter and the inner product can be useful to detect the region where the receiver belongs.
{"title":"Simple radio positioning system based on direct sequence spread spectrum","authors":"Shinichi Watanabe, M. Saito, M. Okada","doi":"10.1109/RWS.2010.5434235","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434235","url":null,"abstract":"This paper proposes a simple positioning method for small devices based on direct sequence spread spectrum signal. The proposed scheme measures the sign of inner product between reference signal from a loop antenna and the delayed signal from the double loop antenna. Thus, it can identify the region where the receiver exists based on the inner product. Numerical results show that the area where the inner product becomes negative or positive is symmetric with respect to the position of the transmitter and the inner product can be useful to detect the region where the receiver belongs.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130530503","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 : 2010-01-10DOI: 10.1109/RWS.2010.5434168
J. Hoversten, Z. Popovic
A general envelope tracking (ET) transmitter is described which utilizes both drive and drain modulation. We develop a simulation method useful for modeling the impact of component non-idealities on system performance, starting from hardware measurement data. An example analysis evaluates tradeoffs between ET system linearity, power amplifier efficiency, and envelope modulator requirements for a W-CDMA down-link transmitter.
{"title":"Envelope tracking transmitter system analysis method","authors":"J. Hoversten, Z. Popovic","doi":"10.1109/RWS.2010.5434168","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434168","url":null,"abstract":"A general envelope tracking (ET) transmitter is described which utilizes both drive and drain modulation. We develop a simulation method useful for modeling the impact of component non-idealities on system performance, starting from hardware measurement data. An example analysis evaluates tradeoffs between ET system linearity, power amplifier efficiency, and envelope modulator requirements for a W-CDMA down-link transmitter.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131132335","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 : 2010-01-10DOI: 10.1109/RWS.2010.5434157
J. Zeleny, P. Rosson, C. Dehos, A. Kaiser
In this paper, a digital algorithm is proposed for the compensation of base station power amplifier nonlinearity for 802.16j very high data rate systems. The compensation takes place into the relay station receiver, which reduce the overall network power consumption. Simulation results show good performance enhancement, while an experimental test bed achieves the proof of concept on WIMAX signal.
{"title":"Digital compensation of the power amplifier nonlinearities at relay station receivers in 802.16j very high data rate systems","authors":"J. Zeleny, P. Rosson, C. Dehos, A. Kaiser","doi":"10.1109/RWS.2010.5434157","DOIUrl":"https://doi.org/10.1109/RWS.2010.5434157","url":null,"abstract":"In this paper, a digital algorithm is proposed for the compensation of base station power amplifier nonlinearity for 802.16j very high data rate systems. The compensation takes place into the relay station receiver, which reduce the overall network power consumption. Simulation results show good performance enhancement, while an experimental test bed achieves the proof of concept on WIMAX signal.","PeriodicalId":334671,"journal":{"name":"2010 IEEE Radio and Wireless Symposium (RWS)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128820291","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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