Pub Date : 2012-11-12DOI: 10.1109/ICUWB.2012.6340497
G. N. Shirazi, L. Lampe
We present a compressive sensing (CS) approach for secret key agreement based on UWB channel reciprocity. More generally, we show that the CS problem can be used for solving the distributed source coding problem. We also show that the proposed CS-based secret key agreement protocol (CS-SKAP) provides perfect secrecy, a better key agreement probability, and sometimes a longer secret key length, compared to the traditional syndrome-based distributed source coding techniques.
{"title":"A compressive sensing approach for secret key agreement based on UWB channel reciprocity","authors":"G. N. Shirazi, L. Lampe","doi":"10.1109/ICUWB.2012.6340497","DOIUrl":"https://doi.org/10.1109/ICUWB.2012.6340497","url":null,"abstract":"We present a compressive sensing (CS) approach for secret key agreement based on UWB channel reciprocity. More generally, we show that the CS problem can be used for solving the distributed source coding problem. We also show that the proposed CS-based secret key agreement protocol (CS-SKAP) provides perfect secrecy, a better key agreement probability, and sometimes a longer secret key length, compared to the traditional syndrome-based distributed source coding techniques.","PeriodicalId":260071,"journal":{"name":"2012 IEEE International Conference on Ultra-Wideband","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125372742","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 : 2012-11-12DOI: 10.1109/ICUWB.2012.6340505
S. H. Ramazannia, S. Chamaani, S. A. Mirtaheri, F. K. M. Yazdi, M. Yazdani
Reducing the interference between ultra wideband (UWB) and existing wireless communication systems has become of importance recently. In this study, we propose an equal 1 to 4 power divider (PD) which enables the suppression of three different frequencies, 3.95, 5.2 and 5.8 GHz, in the UWB frequency band by means of U-shaped defected ground structure (DGS). In this respect, it is essential to provide steep band-rejection with high Q-factor. The authors have used a novel method to attain this goal using U-shaped DGS. Studies show that there is a relation between the line width and Q-factor of a given band-notched structure. Therefore, instead of using a 50-50-50 ohm configuration, a 50-100-50 ohm transformation is used which has a narrower line width in the middle of the PD providing a steeper suppression with a high Q-factor. The measured Q-factor compared to similar structures is higher having a value of 27.5 with more than 30 dB suppression.
{"title":"A UWB 1 to 4 wilkinson power divider with triple high-Q band-notched characteristic using U-shaped DGS","authors":"S. H. Ramazannia, S. Chamaani, S. A. Mirtaheri, F. K. M. Yazdi, M. Yazdani","doi":"10.1109/ICUWB.2012.6340505","DOIUrl":"https://doi.org/10.1109/ICUWB.2012.6340505","url":null,"abstract":"Reducing the interference between ultra wideband (UWB) and existing wireless communication systems has become of importance recently. In this study, we propose an equal 1 to 4 power divider (PD) which enables the suppression of three different frequencies, 3.95, 5.2 and 5.8 GHz, in the UWB frequency band by means of U-shaped defected ground structure (DGS). In this respect, it is essential to provide steep band-rejection with high Q-factor. The authors have used a novel method to attain this goal using U-shaped DGS. Studies show that there is a relation between the line width and Q-factor of a given band-notched structure. Therefore, instead of using a 50-50-50 ohm configuration, a 50-100-50 ohm transformation is used which has a narrower line width in the middle of the PD providing a steeper suppression with a high Q-factor. The measured Q-factor compared to similar structures is higher having a value of 27.5 with more than 30 dB suppression.","PeriodicalId":260071,"journal":{"name":"2012 IEEE International Conference on Ultra-Wideband","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129577425","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 : 2012-11-12DOI: 10.1109/ICUWB.2012.6340405
S. Demirel, F. Güneş
This work focuses on the performance sensitivities of a wide-band microstrip amplifier along its operation bandwidth using “Adjoint Network and Adjoint Variable” method, via “Wave” approaches, which include sensitivities of the transducer power gain, noise figure, magnitude and phase of the input reflection coefficient. Thus, this work can be considered as an extension of the work in [2] to the performance sensitivities with respect directly to the microstrip width and length. These analytical expressions of the performance sensitivities can be used for the gradient-based efficient optimization, in tolerance and yield analysis of the microstrip amplifiers. Performance sensitivities of the Π-type microstrip amplifier are considered as a worked example. Results of the Π-type amplifier designed for the maximum gain GTmax constrained by the minimum noise figure at each operation frequency Fmin(f) and input VSWR (Vireq= 1.85) within the frequency range 8-18 GHz are given as compared with the results of the perturbational and Chain Parameter methods. Finally sensitivities of all the microstrip lines of the amplifier are arranged according to the increasing values of the sensitivity measures to be considered in the realization stage.
{"title":"Performance sensitivities of a microstrip amplifier using Adjoint Network method","authors":"S. Demirel, F. Güneş","doi":"10.1109/ICUWB.2012.6340405","DOIUrl":"https://doi.org/10.1109/ICUWB.2012.6340405","url":null,"abstract":"This work focuses on the performance sensitivities of a wide-band microstrip amplifier along its operation bandwidth using “Adjoint Network and Adjoint Variable” method, via “Wave” approaches, which include sensitivities of the transducer power gain, noise figure, magnitude and phase of the input reflection coefficient. Thus, this work can be considered as an extension of the work in [2] to the performance sensitivities with respect directly to the microstrip width and length. These analytical expressions of the performance sensitivities can be used for the gradient-based efficient optimization, in tolerance and yield analysis of the microstrip amplifiers. Performance sensitivities of the Π-type microstrip amplifier are considered as a worked example. Results of the Π-type amplifier designed for the maximum gain GTmax constrained by the minimum noise figure at each operation frequency Fmin(f) and input VSWR (Vireq= 1.85) within the frequency range 8-18 GHz are given as compared with the results of the perturbational and Chain Parameter methods. Finally sensitivities of all the microstrip lines of the amplifier are arranged according to the increasing values of the sensitivity measures to be considered in the realization stage.","PeriodicalId":260071,"journal":{"name":"2012 IEEE International Conference on Ultra-Wideband","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126667627","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 : 2012-11-12DOI: 10.1109/ICUWB.2012.6340468
R. Prasad, A. Mihovska, E. Cianca, S. Mukherjee
This paper provides a comparative overview of two short-range wireless technologies with high potential for use in various data-intensive and security-sensitive applications, namely, ultra wideband (UWB) and visible light communications (VLC). Both are emerging technologies with some unique features that draw a great research and commercial interest, also because of their applicability to the research in other fields, such as wireless robotics and communications, remote sensing and location-based communications, the medical field, and so forth. The paper outlines the most recent research and standardization developments for both technologies and gives a proposal for their suitability based on a comparative view, of the strengths and weaknesses for use in applications, such as home networking, vehicular communications, and medical care, including the main technical challenges.
{"title":"Comparative overview of UWB and VLC for data-intensive and security-sensitive applications","authors":"R. Prasad, A. Mihovska, E. Cianca, S. Mukherjee","doi":"10.1109/ICUWB.2012.6340468","DOIUrl":"https://doi.org/10.1109/ICUWB.2012.6340468","url":null,"abstract":"This paper provides a comparative overview of two short-range wireless technologies with high potential for use in various data-intensive and security-sensitive applications, namely, ultra wideband (UWB) and visible light communications (VLC). Both are emerging technologies with some unique features that draw a great research and commercial interest, also because of their applicability to the research in other fields, such as wireless robotics and communications, remote sensing and location-based communications, the medical field, and so forth. The paper outlines the most recent research and standardization developments for both technologies and gives a proposal for their suitability based on a comparative view, of the strengths and weaknesses for use in applications, such as home networking, vehicular communications, and medical care, including the main technical challenges.","PeriodicalId":260071,"journal":{"name":"2012 IEEE International Conference on Ultra-Wideband","volume":"393 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131989480","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 : 2012-11-12DOI: 10.1109/ICUWB.2012.6340407
H. Schumacher, D. Lin, A. Trasser
The chipsets discussed in this paper follow the philosophy that the beauty of impulse radio ultra-wideband lies in its simplicity. They provide fully differential circuit solutions in a low-cost SiGe heterostructure bipolar transistor technology addressing short range radar sensors as well as communication links. At the core, an efficient pulse generator concept allows for spectral tunability as well as biphase modulated pulses. Receiver concepts implement correlation detection for radar and biphase modulation, and energy detection for on-off keying communications and localization. Finally, a successful approach to rapid turn-around transmit/receive modules for monostatic IR UWB radars is presented.
{"title":"Frontend ICs for impulse radio sensing and communications","authors":"H. Schumacher, D. Lin, A. Trasser","doi":"10.1109/ICUWB.2012.6340407","DOIUrl":"https://doi.org/10.1109/ICUWB.2012.6340407","url":null,"abstract":"The chipsets discussed in this paper follow the philosophy that the beauty of impulse radio ultra-wideband lies in its simplicity. They provide fully differential circuit solutions in a low-cost SiGe heterostructure bipolar transistor technology addressing short range radar sensors as well as communication links. At the core, an efficient pulse generator concept allows for spectral tunability as well as biphase modulated pulses. Receiver concepts implement correlation detection for radar and biphase modulation, and energy detection for on-off keying communications and localization. Finally, a successful approach to rapid turn-around transmit/receive modules for monostatic IR UWB radars is presented.","PeriodicalId":260071,"journal":{"name":"2012 IEEE International Conference on Ultra-Wideband","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131990898","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 : 2012-11-12DOI: 10.1109/ICUWB.2012.6340487
Luke Rumbaugh, W. Jemison, Yifei Li, T. Wey
An erbium-doped fiber ring laser with a 1 km-long resonator cavity is presented as an instantaneous wideband source for high-resolution lidar and radar. This signal source has a high bandwidth and a uniform spectrum, desirable qualities for high performance correlation-based ranging. A microwave bandwidth photodetector is used to convert the optical signal to an electrical signal with 4 GHz of bandwidth, whose spectral flatness is seen to be +/- 2 dB.
{"title":"Wide bandwidth source for high resolution ranging","authors":"Luke Rumbaugh, W. Jemison, Yifei Li, T. Wey","doi":"10.1109/ICUWB.2012.6340487","DOIUrl":"https://doi.org/10.1109/ICUWB.2012.6340487","url":null,"abstract":"An erbium-doped fiber ring laser with a 1 km-long resonator cavity is presented as an instantaneous wideband source for high-resolution lidar and radar. This signal source has a high bandwidth and a uniform spectrum, desirable qualities for high performance correlation-based ranging. A microwave bandwidth photodetector is used to convert the optical signal to an electrical signal with 4 GHz of bandwidth, whose spectral flatness is seen to be +/- 2 dB.","PeriodicalId":260071,"journal":{"name":"2012 IEEE International Conference on Ultra-Wideband","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131818958","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 : 2012-11-12DOI: 10.1109/ICUWB.2012.6340395
L. Zwirello, Michael Hesz, L. Sit, T. Zwick
In this paper a detailed analysis of an Ultra-Wideband correlation receiver is presented. The synchronization methods are discussed and analyzed in terms of practical realizability. All algorithms are implemented on FPGA and tested with a real UWB transceiver. The measurement results are then evaluated and compared to the ones found in the literature. Finally an application example for the correlation receiver is demonstrated by means of one-way ranging.
{"title":"Algorithms for synchronization of coherent UWB receivers and their application","authors":"L. Zwirello, Michael Hesz, L. Sit, T. Zwick","doi":"10.1109/ICUWB.2012.6340395","DOIUrl":"https://doi.org/10.1109/ICUWB.2012.6340395","url":null,"abstract":"In this paper a detailed analysis of an Ultra-Wideband correlation receiver is presented. The synchronization methods are discussed and analyzed in terms of practical realizability. All algorithms are implemented on FPGA and tested with a real UWB transceiver. The measurement results are then evaluated and compared to the ones found in the literature. Finally an application example for the correlation receiver is demonstrated by means of one-way ranging.","PeriodicalId":260071,"journal":{"name":"2012 IEEE International Conference on Ultra-Wideband","volume":"2017 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127562726","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 : 2012-11-12DOI: 10.1109/ICUWB.2012.6340498
Natalie Jones, S. Hum
An ultra-wideband (UWB) spatial filter concept is proposed for one-dimensional time-of-arrival (TOA) localization in a tunnel environment. The spatial filter exploits the fact that electromagnetic waves travel as modes in a tunnel and that these modes can be filtered using a sparse array of antennas. It is shown that the spatial filter delivers centimeter ranging accuracy at moderate to high signal-to-noise ratio (SNR) values even when the tunnel is heavily overmoded. Results generated using an analytical equation model and ray tracing model are used to evaluate the performance of the spatial filter.
{"title":"An ultra-wideband spatial filter for a tunnel environment","authors":"Natalie Jones, S. Hum","doi":"10.1109/ICUWB.2012.6340498","DOIUrl":"https://doi.org/10.1109/ICUWB.2012.6340498","url":null,"abstract":"An ultra-wideband (UWB) spatial filter concept is proposed for one-dimensional time-of-arrival (TOA) localization in a tunnel environment. The spatial filter exploits the fact that electromagnetic waves travel as modes in a tunnel and that these modes can be filtered using a sparse array of antennas. It is shown that the spatial filter delivers centimeter ranging accuracy at moderate to high signal-to-noise ratio (SNR) values even when the tunnel is heavily overmoded. Results generated using an analytical equation model and ray tracing model are used to evaluate the performance of the spatial filter.","PeriodicalId":260071,"journal":{"name":"2012 IEEE International Conference on Ultra-Wideband","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125202531","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 : 2012-11-12DOI: 10.1109/ICUWB.2012.6340429
D. Cassioli
Measurements of the 60 GHz UWB indoor channel done in a modern office building at the University of L'Aquila, Italy, are presented. The channel sounder is based on a PN-sequence correlation technique with a pulse width of 0.8 ns. Signals are recorded in different locations in line-of-sight and non-line-of-sight scenarios, and for each location the receiver is moved over a grid of 9×9 positions, in order to characterize both the large and the small scale behaviors. Samples of the channel impulse response are recorded at eight different carrier frequencies spanning the bands from 54 to 59 GHz and from 61 to 66 GHz. In this paper we propose an analysis of the experimental data in order to provide models for the large scale behavior of these signals, including a study of the frequency dependence.
{"title":"60 GHz UWB channel measurement and model","authors":"D. Cassioli","doi":"10.1109/ICUWB.2012.6340429","DOIUrl":"https://doi.org/10.1109/ICUWB.2012.6340429","url":null,"abstract":"Measurements of the 60 GHz UWB indoor channel done in a modern office building at the University of L'Aquila, Italy, are presented. The channel sounder is based on a PN-sequence correlation technique with a pulse width of 0.8 ns. Signals are recorded in different locations in line-of-sight and non-line-of-sight scenarios, and for each location the receiver is moved over a grid of 9×9 positions, in order to characterize both the large and the small scale behaviors. Samples of the channel impulse response are recorded at eight different carrier frequencies spanning the bands from 54 to 59 GHz and from 61 to 66 GHz. In this paper we propose an analysis of the experimental data in order to provide models for the large scale behavior of these signals, including a study of the frequency dependence.","PeriodicalId":260071,"journal":{"name":"2012 IEEE International Conference on Ultra-Wideband","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117226321","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 : 2012-11-12DOI: 10.1109/ICUWB.2012.6340433
M. Fujii, Yu Watanabe
In detect and avoid techniques of ultra-wide-band systems, there are some avoidance techniques which require information of both a primary signal and a noise level in order to control the transmitted power. Thus, we need to estimate the primary signal power and the noise variance with a high degree of accuracy. In this paper, we propose a new estimation method of primary signal to noise ratio. Our proposed method assumes several models of observed carriers, adopts the maximum likelihood criterion to estimate parameters in each model and selects the most suitable model based on the Akaike information criterion. By computer simulations, we evaluate the proposed estimator and show that the proposed method can estimate the parameters with a high degree of accuracy in several situations.
{"title":"A study on SNR estimation for cognitive radio","authors":"M. Fujii, Yu Watanabe","doi":"10.1109/ICUWB.2012.6340433","DOIUrl":"https://doi.org/10.1109/ICUWB.2012.6340433","url":null,"abstract":"In detect and avoid techniques of ultra-wide-band systems, there are some avoidance techniques which require information of both a primary signal and a noise level in order to control the transmitted power. Thus, we need to estimate the primary signal power and the noise variance with a high degree of accuracy. In this paper, we propose a new estimation method of primary signal to noise ratio. Our proposed method assumes several models of observed carriers, adopts the maximum likelihood criterion to estimate parameters in each model and selects the most suitable model based on the Akaike information criterion. By computer simulations, we evaluate the proposed estimator and show that the proposed method can estimate the parameters with a high degree of accuracy in several situations.","PeriodicalId":260071,"journal":{"name":"2012 IEEE International Conference on Ultra-Wideband","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125766220","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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