Pub Date : 2010-03-07DOI: 10.1109/SSST.2010.5442853
Veneela Ammula, S. M. Rao, S. Wentworth
Smart antennas present a promising solution to the present day capacity and coverage shortage in mobile wireless communications. These intelligent antennas when used at the base station can avoid a lot of interference by transmitting and receiving signals only in desired directions. Circular array antennas have gained popularity among various antenna configurations used for direction agile applications. This paper presents a planar circular array antenna for base stations in mobile wireless communication systems. The antenna could be electronically steered to give a complete 360 coverage around the base station. The model was created using FEKO Suite 5.4, a Method of Moments (MoM) based electromagnetic simulation software. Particle Swarm Optimization algorithm was applied to maximize the gain of the antenna in a single azimuth direction. Ideal dimensions for the antenna structure were obtained from the optimization process. The designed antenna was fabricated and tested in an anechoic chamber to verify its radiation characteristics. The experimental results were found to be in good agreement with the simulation results.
智能天线是解决当前移动无线通信容量和覆盖不足的一个很有前景的解决方案。这些智能天线在基站中使用时，可以通过只在期望的方向上发射和接收信号来避免很多干扰。圆形阵列天线在用于方向敏捷应用的各种天线配置中得到了广泛的应用。提出了一种用于移动无线通信系统中基站的平面圆形阵列天线。天线可以通过电子控制，在基站周围提供完整的360度覆盖。采用基于矩量法(MoM)的电磁仿真软件FEKO Suite 5.4建立模型。采用粒子群优化算法使天线在单方位方向上的增益最大化。通过优化得到了天线结构的理想尺寸。设计的天线在消声室中进行了制作和测试，以验证其辐射特性。实验结果与仿真结果吻合较好。
{"title":"Dual excited planar circular array antenna for direction agile applications","authors":"Veneela Ammula, S. M. Rao, S. Wentworth","doi":"10.1109/SSST.2010.5442853","DOIUrl":"https://doi.org/10.1109/SSST.2010.5442853","url":null,"abstract":"Smart antennas present a promising solution to the present day capacity and coverage shortage in mobile wireless communications. These intelligent antennas when used at the base station can avoid a lot of interference by transmitting and receiving signals only in desired directions. Circular array antennas have gained popularity among various antenna configurations used for direction agile applications. This paper presents a planar circular array antenna for base stations in mobile wireless communication systems. The antenna could be electronically steered to give a complete 360 coverage around the base station. The model was created using FEKO Suite 5.4, a Method of Moments (MoM) based electromagnetic simulation software. Particle Swarm Optimization algorithm was applied to maximize the gain of the antenna in a single azimuth direction. Ideal dimensions for the antenna structure were obtained from the optimization process. The designed antenna was fabricated and tested in an anechoic chamber to verify its radiation characteristics. The experimental results were found to be in good agreement with the simulation results.","PeriodicalId":6463,"journal":{"name":"2010 42nd Southeastern Symposium on System Theory (SSST)","volume":"66 1","pages":"138-142"},"PeriodicalIF":0.0,"publicationDate":"2010-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75567367","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 : 2010-03-07DOI: 10.1109/SSST.2010.5442835
Mary Ruttum, S. P. Parikh
This paper provides a different method for humanrobot interaction and further encourages communication between human users and their robotic counterparts. The focus of our work is to develop a human-robot communication system that is not easily detectable and increases stealth when necessary. The human-robot interaction system we propose involves hand signals. Hand gestures are a common modality of communication humans use with each other. Likewise, hand commands are used by the Marine Corps to convey information to each other without speaking. We analyze common Marine gestures so that similar commands can be used to direct a robot out in the field. In this paper, we have selected important hand or body gestures used by the Marine Corps. We then identify distinguishable features for the different gestures. This includes position of joint variables as well as velocity and acceleration terms. Once ideal models of the gestures are designed, experimental data is gathered. Presently, we are comparing two different machine learning methods that can be used to identify a specific gesture. The two methods we are comparing are Bayesian networks and neural networks. This paper provides the background and structure of our experiments. Then, both models are discussed and experimental results are included. Finally, we make a comparison of the effectiveness of the two methods of interest.
{"title":"Can robots recognize common Marine gestures?","authors":"Mary Ruttum, S. P. Parikh","doi":"10.1109/SSST.2010.5442835","DOIUrl":"https://doi.org/10.1109/SSST.2010.5442835","url":null,"abstract":"This paper provides a different method for humanrobot interaction and further encourages communication between human users and their robotic counterparts. The focus of our work is to develop a human-robot communication system that is not easily detectable and increases stealth when necessary. The human-robot interaction system we propose involves hand signals. Hand gestures are a common modality of communication humans use with each other. Likewise, hand commands are used by the Marine Corps to convey information to each other without speaking. We analyze common Marine gestures so that similar commands can be used to direct a robot out in the field. In this paper, we have selected important hand or body gestures used by the Marine Corps. We then identify distinguishable features for the different gestures. This includes position of joint variables as well as velocity and acceleration terms. Once ideal models of the gestures are designed, experimental data is gathered. Presently, we are comparing two different machine learning methods that can be used to identify a specific gesture. The two methods we are comparing are Bayesian networks and neural networks. This paper provides the background and structure of our experiments. Then, both models are discussed and experimental results are included. Finally, we make a comparison of the effectiveness of the two methods of interest.","PeriodicalId":6463,"journal":{"name":"2010 42nd Southeastern Symposium on System Theory (SSST)","volume":"39 1","pages":"227-231"},"PeriodicalIF":0.0,"publicationDate":"2010-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74733395","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 : 2010-03-07DOI: 10.1109/SSST.2010.5442808
R. Pieper, Daniel Blair
The sensitive dependence on initial conditions found in nonlinear chaotic systems is known as the “butterfly effect”. Such systems when numerically analyzed can exhibit a convergence instability when employing standard numerical methods. Presented here is a practical numerical method for eliminating the “under-resolution” problem observed when solving for solutions to nonlinear chaotic systems with fast but memory limited computers. The proposed idea of using a micro-integrator loop was applied with the Modified Euler Method of numerical integration. The improvement offered by combining the micro-integrator loop with the classical integration scheme created an avenue for achieving convergence using much less memory than would be required if the micro-integrator loop was not employed.
{"title":"A practical solution to the numerical butterfly effect in chaotic systems for fast but memory limited computers","authors":"R. Pieper, Daniel Blair","doi":"10.1109/SSST.2010.5442808","DOIUrl":"https://doi.org/10.1109/SSST.2010.5442808","url":null,"abstract":"The sensitive dependence on initial conditions found in nonlinear chaotic systems is known as the “butterfly effect”. Such systems when numerically analyzed can exhibit a convergence instability when employing standard numerical methods. Presented here is a practical numerical method for eliminating the “under-resolution” problem observed when solving for solutions to nonlinear chaotic systems with fast but memory limited computers. The proposed idea of using a micro-integrator loop was applied with the Modified Euler Method of numerical integration. The improvement offered by combining the micro-integrator loop with the classical integration scheme created an avenue for achieving convergence using much less memory than would be required if the micro-integrator loop was not employed.","PeriodicalId":6463,"journal":{"name":"2010 42nd Southeastern Symposium on System Theory (SSST)","volume":"47 2","pages":"335-339"},"PeriodicalIF":0.0,"publicationDate":"2010-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73216991","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 : 2010-03-07DOI: 10.1109/SSST.2010.5442809
Wendy Zhang, Kuo-pao Yang, R. Shrestha, F. Petry, Smantha Zabom
This research aids in developing of a Physics Markup Language (PML) for the representation of Physical models. By providing a standard way of documenting the physical and mathematical semantics of these physics based models, a Physics Markup Language (PML) will improve communication of model's semantics to support interoperability between physics-based models, such as multi-physics simulation and interoperability with other non-physics based models. Geometric Algebra (GA) is a powerful and practical framework for the representation and solution of geometrical problems. GA is the fundamental underlying mathematics for most physical models. OpenMath is a XML-based markup language for representing and communicating mathematics that tries to combine natural and formal language. This research utilized OpenMath by creating Content Dictionaries, to implement the mathematical semantics for the underlying mathematics, Geometric Algebra.
{"title":"Using OpenMath to present semantics of Geometric Algebra","authors":"Wendy Zhang, Kuo-pao Yang, R. Shrestha, F. Petry, Smantha Zabom","doi":"10.1109/SSST.2010.5442809","DOIUrl":"https://doi.org/10.1109/SSST.2010.5442809","url":null,"abstract":"This research aids in developing of a Physics Markup Language (PML) for the representation of Physical models. By providing a standard way of documenting the physical and mathematical semantics of these physics based models, a Physics Markup Language (PML) will improve communication of model's semantics to support interoperability between physics-based models, such as multi-physics simulation and interoperability with other non-physics based models. Geometric Algebra (GA) is a powerful and practical framework for the representation and solution of geometrical problems. GA is the fundamental underlying mathematics for most physical models. OpenMath is a XML-based markup language for representing and communicating mathematics that tries to combine natural and formal language. This research utilized OpenMath by creating Content Dictionaries, to implement the mathematical semantics for the underlying mathematics, Geometric Algebra.","PeriodicalId":6463,"journal":{"name":"2010 42nd Southeastern Symposium on System Theory (SSST)","volume":"94 1","pages":"362-366"},"PeriodicalIF":0.0,"publicationDate":"2010-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76409919","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 : 2010-03-07DOI: 10.1109/SSST.2010.5442840
A. Eid, H. El-kishky, M. Abdel-Salam, T. El-Mohandes
A model of the advanced aircraft electric power system is developed and studied under variable-speed constant-frequency (VSCF) operation. The frequency of the generator's output voltage is varied from 400-Hz to 800-Hz for different loading case-studies. Non-linear DC loads in addition to the different passive and dynamic AC loads are included in the simulation of the VSCF aircraft electric power system. Power conversions are obtained using 12-pulse converters. Moreover, two high-pass passive filters are designed and compared according to their loss and effectiveness in reducing the harmonic contents of the generator output waveforms. The power quality characteristics of the studied VSCF aircraft electric power system are presented and the effectiveness of the proposed filters is demonstrated through compliance with the newly published aircraft electrical standards MIL-STD-704F.
{"title":"Power quality investigations of VSCF aircraft electric power systems","authors":"A. Eid, H. El-kishky, M. Abdel-Salam, T. El-Mohandes","doi":"10.1109/SSST.2010.5442840","DOIUrl":"https://doi.org/10.1109/SSST.2010.5442840","url":null,"abstract":"A model of the advanced aircraft electric power system is developed and studied under variable-speed constant-frequency (VSCF) operation. The frequency of the generator's output voltage is varied from 400-Hz to 800-Hz for different loading case-studies. Non-linear DC loads in addition to the different passive and dynamic AC loads are included in the simulation of the VSCF aircraft electric power system. Power conversions are obtained using 12-pulse converters. Moreover, two high-pass passive filters are designed and compared according to their loss and effectiveness in reducing the harmonic contents of the generator output waveforms. The power quality characteristics of the studied VSCF aircraft electric power system are presented and the effectiveness of the proposed filters is demonstrated through compliance with the newly published aircraft electrical standards MIL-STD-704F.","PeriodicalId":6463,"journal":{"name":"2010 42nd Southeastern Symposium on System Theory (SSST)","volume":"63 1","pages":"171-176"},"PeriodicalIF":0.0,"publicationDate":"2010-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79118762","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 : 2010-03-07DOI: 10.1109/SSST.2010.5442797
Midn. C. Henderson, M. Robertson, M. Feemster
This paper documents the application of the use of headway on autonomous convoys using front and back spacing information. The control method is based only on distance measurements between vehicles in the platoon. The lead vehicle's longitudinal control is developed to follow a given velocity. The follower vehicles maintain the desired spacing using distance measurements to the preceding and following vehicles. Headway proportionally varies the desired spacing between the vehicles based on the vehicle's speed. This approach leads to more physically realizable controller efforts for the follower vehicles and helps maintain and improve string stability.
{"title":"Implementation of headway compensation on autonomous vehicle convoys with command shaping","authors":"Midn. C. Henderson, M. Robertson, M. Feemster","doi":"10.1109/SSST.2010.5442797","DOIUrl":"https://doi.org/10.1109/SSST.2010.5442797","url":null,"abstract":"This paper documents the application of the use of headway on autonomous convoys using front and back spacing information. The control method is based only on distance measurements between vehicles in the platoon. The lead vehicle's longitudinal control is developed to follow a given velocity. The follower vehicles maintain the desired spacing using distance measurements to the preceding and following vehicles. Headway proportionally varies the desired spacing between the vehicles based on the vehicle's speed. This approach leads to more physically realizable controller efforts for the follower vehicles and helps maintain and improve string stability.","PeriodicalId":6463,"journal":{"name":"2010 42nd Southeastern Symposium on System Theory (SSST)","volume":"42 1","pages":"25-29"},"PeriodicalIF":0.0,"publicationDate":"2010-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73173923","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 : 2010-03-07DOI: 10.1109/SSST.2010.5442843
R. Taylor, M. Shirvaikar
A coal-fired power plant typically has silos, bunkers or stock piles in which the fuel is placed for storage purposes. Real-time feedback sensors are utilized to sense the coal height so data can be sent to downstream systems for further processing. These systems are required to accurately sense the height of coal within the bunker or stock pile. The range information is then fed in a real-time fashion to a control system. Inaccurate measurements can result in severe environmental and safety consequences. There are many types of ranging sensors available in the marketplace. The coal-fired power plant application is especially daunting due to the particularly harsh operating conditions and reliability requirements. This research project analyzes the performance of three types of range sensors: ultrasonic, radar and laser systems. These systems are currently operational at a plant located in the North East Texas area. The ultrasonic and radar sensors were part of legacy systems and the new laser sensor was integrated as a part of this study. The feedbacks signals from each sensor were recorded over time and compared to measured data. The laser sensor proved to be slightly more accurate than the others, but it has some drawbacks that were listed.
{"title":"Performance analysis of range sensors for a real-time power plant coal level sensing system","authors":"R. Taylor, M. Shirvaikar","doi":"10.1109/SSST.2010.5442843","DOIUrl":"https://doi.org/10.1109/SSST.2010.5442843","url":null,"abstract":"A coal-fired power plant typically has silos, bunkers or stock piles in which the fuel is placed for storage purposes. Real-time feedback sensors are utilized to sense the coal height so data can be sent to downstream systems for further processing. These systems are required to accurately sense the height of coal within the bunker or stock pile. The range information is then fed in a real-time fashion to a control system. Inaccurate measurements can result in severe environmental and safety consequences. There are many types of ranging sensors available in the marketplace. The coal-fired power plant application is especially daunting due to the particularly harsh operating conditions and reliability requirements. This research project analyzes the performance of three types of range sensors: ultrasonic, radar and laser systems. These systems are currently operational at a plant located in the North East Texas area. The ultrasonic and radar sensors were part of legacy systems and the new laser sensor was integrated as a part of this study. The feedbacks signals from each sensor were recorded over time and compared to measured data. The laser sensor proved to be slightly more accurate than the others, but it has some drawbacks that were listed.","PeriodicalId":6463,"journal":{"name":"2010 42nd Southeastern Symposium on System Theory (SSST)","volume":"38 8 Pt 1 1","pages":"188-193"},"PeriodicalIF":0.0,"publicationDate":"2010-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82825007","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 : 2010-03-07DOI: 10.1109/SSST.2010.5442848
N. Andrews, Y. Kondareddy, P. Agrawal
In order to ensure fair access and efficiency of bandwidth usage in wireless integrated networks, resource allocation algorithms should be well designed. In this paper, we briefly discuss the complete sharing, complete partitioning and Hybrid resource sharing approaches and their shortcomings in WiMax-WiFi integrated networks. To overcome these shortcomings we propose the Prioritized Resource Sharing algorithm for WiMax-WiFi integrated networks. In this algorithm, the channels are prioritized for different traffic classes rather than strict reservation or open access. We analyze the proposed algorithm by modeling it using two dimensional continuous time Markov chains. The simulation results indicate that the Prioritized Sharing model achieves the best system utilization compared to other algorithms. It is also observed that due to heavy traffic of one class of users, other class of users are not starved unlike in complete sharing.
{"title":"Channel management in collocated WiFi-WiMAX networks","authors":"N. Andrews, Y. Kondareddy, P. Agrawal","doi":"10.1109/SSST.2010.5442848","DOIUrl":"https://doi.org/10.1109/SSST.2010.5442848","url":null,"abstract":"In order to ensure fair access and efficiency of bandwidth usage in wireless integrated networks, resource allocation algorithms should be well designed. In this paper, we briefly discuss the complete sharing, complete partitioning and Hybrid resource sharing approaches and their shortcomings in WiMax-WiFi integrated networks. To overcome these shortcomings we propose the Prioritized Resource Sharing algorithm for WiMax-WiFi integrated networks. In this algorithm, the channels are prioritized for different traffic classes rather than strict reservation or open access. We analyze the proposed algorithm by modeling it using two dimensional continuous time Markov chains. The simulation results indicate that the Prioritized Sharing model achieves the best system utilization compared to other algorithms. It is also observed that due to heavy traffic of one class of users, other class of users are not starved unlike in complete sharing.","PeriodicalId":6463,"journal":{"name":"2010 42nd Southeastern Symposium on System Theory (SSST)","volume":"80 1","pages":"133-137"},"PeriodicalIF":0.0,"publicationDate":"2010-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88753744","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 : 2010-03-07DOI: 10.1109/SSST.2010.5442819
J. Mountain
Fuzzy specific hardware systems, or the adaptation of standard embedded controllers, are the common approaches for real-time fuzzy logic implementation. High speed applications may require the more sophisticated hardware, but most embedded control applications do not have the high speed processing requirements that necessitate the cost prohibitive enhanced hardware. A review of embedded control fuzzy logic applications indicates a preference for 16-bit architectures; devoting significant processing resources for fuzzification, rule application, and defuzzification. While faithful to the foundations of fuzzy logic control, processor demand can limit a controller's ability to handle peripheral I/O interfaces. This paper describes a generic, hybrid approach suitable for unenhanced 8-bit microcontrollers and adaptable to most single input, single output systems. A motor speed application with real-time I/O interface provides proof of concept performance data and highlights limitations.
{"title":"Fuzzy logic motor speed control with real-time interface using an 8-bit embedded processor","authors":"J. Mountain","doi":"10.1109/SSST.2010.5442819","DOIUrl":"https://doi.org/10.1109/SSST.2010.5442819","url":null,"abstract":"Fuzzy specific hardware systems, or the adaptation of standard embedded controllers, are the common approaches for real-time fuzzy logic implementation. High speed applications may require the more sophisticated hardware, but most embedded control applications do not have the high speed processing requirements that necessitate the cost prohibitive enhanced hardware. A review of embedded control fuzzy logic applications indicates a preference for 16-bit architectures; devoting significant processing resources for fuzzification, rule application, and defuzzification. While faithful to the foundations of fuzzy logic control, processor demand can limit a controller's ability to handle peripheral I/O interfaces. This paper describes a generic, hybrid approach suitable for unenhanced 8-bit microcontrollers and adaptable to most single input, single output systems. A motor speed application with real-time I/O interface provides proof of concept performance data and highlights limitations.","PeriodicalId":6463,"journal":{"name":"2010 42nd Southeastern Symposium on System Theory (SSST)","volume":"39 1","pages":"307-312"},"PeriodicalIF":0.0,"publicationDate":"2010-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80655341","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 : 2010-03-07DOI: 10.1109/SSST.2010.5442895
Brandon Herrera, B. R. Jean
A low cost pulse transceiver has been developed for measuring the electrical properties of materials. The transceiver generates an ultra wide band (UWB) pulse as well as samples the received pulse. The pulse generator has been designed using a silicon-germanium (SiGe) analog comparator which is a possible alternative to step recovery diodes. The pulse is received by an extended time sampling circuit. The sampling circuit presented is an alternative design that does not require the use of a broadband balun.
{"title":"A low cost ultra-wideband pulse transceiver","authors":"Brandon Herrera, B. R. Jean","doi":"10.1109/SSST.2010.5442895","DOIUrl":"https://doi.org/10.1109/SSST.2010.5442895","url":null,"abstract":"A low cost pulse transceiver has been developed for measuring the electrical properties of materials. The transceiver generates an ultra wide band (UWB) pulse as well as samples the received pulse. The pulse generator has been designed using a silicon-germanium (SiGe) analog comparator which is a possible alternative to step recovery diodes. The pulse is received by an extended time sampling circuit. The sampling circuit presented is an alternative design that does not require the use of a broadband balun.","PeriodicalId":6463,"journal":{"name":"2010 42nd Southeastern Symposium on System Theory (SSST)","volume":"22 1","pages":"72-74"},"PeriodicalIF":0.0,"publicationDate":"2010-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91196009","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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