Pub Date : 2009-11-01DOI: 10.1109/COMCAS.2009.5386063
An He, S. Srikanteswara, K. Bae, T. Newman, Jeffrey H. Reed, W. Tranter, M. Sajadieh, M. Verhelst
Power consumption has been a significant issue for many mobile and wireless devices, especially those with high rate applications. This paper presents a methodology and framework to minimize system power consumption for multichannel communications using cognitive radio (CR) based on the application quality of service requirement, the channel condition, and the radio capabilities and characteristics. The CR framework enables an adaptation process that is aware of the radio (component) capabilities and characteristics. This paper mathematically formulates a system power consumption minimization problem under a rate constraint for multichannel communications and develops numerical solutions. Simulation results show that the knowledge of the radio capabilities and characteristics can help to reduce system power consumption significantly (e.g., up to 55% for a multichannel system with Class A power amplifiers).
{"title":"System power consumption minimization for multichannel communications using cognitive radio","authors":"An He, S. Srikanteswara, K. Bae, T. Newman, Jeffrey H. Reed, W. Tranter, M. Sajadieh, M. Verhelst","doi":"10.1109/COMCAS.2009.5386063","DOIUrl":"https://doi.org/10.1109/COMCAS.2009.5386063","url":null,"abstract":"Power consumption has been a significant issue for many mobile and wireless devices, especially those with high rate applications. This paper presents a methodology and framework to minimize system power consumption for multichannel communications using cognitive radio (CR) based on the application quality of service requirement, the channel condition, and the radio capabilities and characteristics. The CR framework enables an adaptation process that is aware of the radio (component) capabilities and characteristics. This paper mathematically formulates a system power consumption minimization problem under a rate constraint for multichannel communications and develops numerical solutions. Simulation results show that the knowledge of the radio capabilities and characteristics can help to reduce system power consumption significantly (e.g., up to 55% for a multichannel system with Class A power amplifiers).","PeriodicalId":372928,"journal":{"name":"2009 IEEE International Conference on Microwaves, Communications, Antennas and Electronics Systems","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116961400","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 : 2009-11-01DOI: 10.1109/COMCAS.2009.5386006
Jinwoo Jung, Kyoungkeun Kim, Jahyeon Lee, Hyeonjin Lee, Yeongseog Lim
A chip monopole antenna with a parasitic patch is proposed for GPS applications. To reduce the dimensions of the antenna, the chip monopole antenna is composed of stacked meander, helix structures, and a parasitic patch. The impedance and radiation characteristics of the antenna are investigated. The measured results show that the proposed antenna, having compact dimensions of 3.6 × 5 × 1.3 mm, has a bandwidth of 60 MHz (1.53–1.59 GHz) and a maximum radiation gain of 0.53 dBi.
{"title":"Compact chip monopole antenna with parasitic patch for GPS applications","authors":"Jinwoo Jung, Kyoungkeun Kim, Jahyeon Lee, Hyeonjin Lee, Yeongseog Lim","doi":"10.1109/COMCAS.2009.5386006","DOIUrl":"https://doi.org/10.1109/COMCAS.2009.5386006","url":null,"abstract":"A chip monopole antenna with a parasitic patch is proposed for GPS applications. To reduce the dimensions of the antenna, the chip monopole antenna is composed of stacked meander, helix structures, and a parasitic patch. The impedance and radiation characteristics of the antenna are investigated. The measured results show that the proposed antenna, having compact dimensions of 3.6 × 5 × 1.3 mm, has a bandwidth of 60 MHz (1.53–1.59 GHz) and a maximum radiation gain of 0.53 dBi.","PeriodicalId":372928,"journal":{"name":"2009 IEEE International Conference on Microwaves, Communications, Antennas and Electronics Systems","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121089361","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 : 2009-11-01DOI: 10.1109/COMCAS.2009.5385960
Q. Bonds, T. Weller, B. Roeder, P. Herzig
Presented is a Cavity Backed Slot Antenna (CBSA) designed for integration into a biomedical radiometric sensor. The sensor is intended for close proximity health monitoring applications. An internal probe feed adds a novel approach to biomedical antenna design by isolating antenna feed currents from the body and providing frequency tuning of ~50MHz/mm as a function of probe length. Measurements and simulations performed with the CBSA in close proximity to a skin tissue phantom confirm that the antenna is a good candidate for the intended applications.
{"title":"A tunable Cavity Backed Slot Antenna (CBSA) for close proximity biomedical sensing applications","authors":"Q. Bonds, T. Weller, B. Roeder, P. Herzig","doi":"10.1109/COMCAS.2009.5385960","DOIUrl":"https://doi.org/10.1109/COMCAS.2009.5385960","url":null,"abstract":"Presented is a Cavity Backed Slot Antenna (CBSA) designed for integration into a biomedical radiometric sensor. The sensor is intended for close proximity health monitoring applications. An internal probe feed adds a novel approach to biomedical antenna design by isolating antenna feed currents from the body and providing frequency tuning of ~50MHz/mm as a function of probe length. Measurements and simulations performed with the CBSA in close proximity to a skin tissue phantom confirm that the antenna is a good candidate for the intended applications.","PeriodicalId":372928,"journal":{"name":"2009 IEEE International Conference on Microwaves, Communications, Antennas and Electronics Systems","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127228852","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 : 2009-11-01DOI: 10.1109/COMCAS.2009.5385994
A. Reichman
Recent advances in wireless technology have led to the development of wireless body area networks (WBAN), where a set of communicating devices are located around the human body. IEEE 802.15.6 is the Task Group established to develop guideline for using wireless technologies for medical device communications in various healthcare services. The operating scenarios are determined based on the location of the communicating nodes, i.e. implant, body surface and external. The system requirements include extremely low power operation, low weight, and small size, fault tolerant system operation. It should be capable of energy scavenging or battery-less operation with a small form factor for the whole radio, antenna, power supply system. The sensor should have the flexibility necessary to adapt to the user's state and changes in the environment.
{"title":"Standardization of body area networks","authors":"A. Reichman","doi":"10.1109/COMCAS.2009.5385994","DOIUrl":"https://doi.org/10.1109/COMCAS.2009.5385994","url":null,"abstract":"Recent advances in wireless technology have led to the development of wireless body area networks (WBAN), where a set of communicating devices are located around the human body. IEEE 802.15.6 is the Task Group established to develop guideline for using wireless technologies for medical device communications in various healthcare services. The operating scenarios are determined based on the location of the communicating nodes, i.e. implant, body surface and external. The system requirements include extremely low power operation, low weight, and small size, fault tolerant system operation. It should be capable of energy scavenging or battery-less operation with a small form factor for the whole radio, antenna, power supply system. The sensor should have the flexibility necessary to adapt to the user's state and changes in the environment.","PeriodicalId":372928,"journal":{"name":"2009 IEEE International Conference on Microwaves, Communications, Antennas and Electronics Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123784162","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 : 2009-11-01DOI: 10.1109/COMCAS.2009.5385948
A. Freedman
The International Mobile Telecommunications -Advanced (IMT-Advanced) is a concept from the ITU for mobile communication systems with capabilities which go further than that of third generation systems — IMT- 2000. Currently IMT-Advanced is a name of a process rather than detailed technical specifications, to lead and coordinate the international standards towards the 4th generation mobile communication systems. The tutorial describes the vision and requirements set by the ITU for IMT- Advanced and explains the process and its schedule. Finally the technical specifications, although still in a draft stage, of main radio interface technology candidates will be described
{"title":"International Mobile Telecommunications - Advanced tutorial highlights","authors":"A. Freedman","doi":"10.1109/COMCAS.2009.5385948","DOIUrl":"https://doi.org/10.1109/COMCAS.2009.5385948","url":null,"abstract":"The International Mobile Telecommunications -Advanced (IMT-Advanced) is a concept from the ITU for mobile communication systems with capabilities which go further than that of third generation systems — IMT- 2000. Currently IMT-Advanced is a name of a process rather than detailed technical specifications, to lead and coordinate the international standards towards the 4th generation mobile communication systems. The tutorial describes the vision and requirements set by the ITU for IMT- Advanced and explains the process and its schedule. Finally the technical specifications, although still in a draft stage, of main radio interface technology candidates will be described","PeriodicalId":372928,"journal":{"name":"2009 IEEE International Conference on Microwaves, Communications, Antennas and Electronics Systems","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125388490","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 : 2009-11-01DOI: 10.1109/COMCAS.2009.5385985
D. Chernin, J. Petillo, T. Antonsen, B. Levush
Traveling wave tubes (TWTs) remain the amplifiers of choice in many ground and space-based applications requiring the production of broadband high frequency microwave and millimeter wave power with high efficiency. All modern TWTs are designed using sophisticated computer-based design tools that are based on the fundamental physical laws governing the emission, transport, interaction, and collection of electron beams. This paper provides an overview of a state-of-the-art suite of modeling and design tools for the end-to-end simulation of coupled-cavity and helix traveling wave tubes.
{"title":"Recent advances in modeling of traveling wave tubes","authors":"D. Chernin, J. Petillo, T. Antonsen, B. Levush","doi":"10.1109/COMCAS.2009.5385985","DOIUrl":"https://doi.org/10.1109/COMCAS.2009.5385985","url":null,"abstract":"Traveling wave tubes (TWTs) remain the amplifiers of choice in many ground and space-based applications requiring the production of broadband high frequency microwave and millimeter wave power with high efficiency. All modern TWTs are designed using sophisticated computer-based design tools that are based on the fundamental physical laws governing the emission, transport, interaction, and collection of electron beams. This paper provides an overview of a state-of-the-art suite of modeling and design tools for the end-to-end simulation of coupled-cavity and helix traveling wave tubes.","PeriodicalId":372928,"journal":{"name":"2009 IEEE International Conference on Microwaves, Communications, Antennas and Electronics Systems","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114922677","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 : 2009-11-01DOI: 10.1109/COMCAS.2009.5386081
I. Gurman, Y. Soreq, R. Shavit, M. Givon, G. Aviv, D. Groswasser, R. Folman
We propose a new approach for the design of a cavity for atom vapor based devices, where atomic manipulation via two frequencies is required. The cavity provides a homogenous field at two different frequency bands −6.8GHz and 2MHz; the first frequency is supported by a cylindrical resonator with conductive walls and dielectric bases, the second frequency is applied from an external source and penetrates into the cavity by taking advantage of the skin effect phenomenon of the resonator thin metal walls. In the specific design presented here, the cavity contains a glass cell with Rubidium vapor and enables the two-photon manipulation of the 52S1/2 ground state manifold.
{"title":"Dual frequency cavity resonator for atomic manipulation and spectroscopy","authors":"I. Gurman, Y. Soreq, R. Shavit, M. Givon, G. Aviv, D. Groswasser, R. Folman","doi":"10.1109/COMCAS.2009.5386081","DOIUrl":"https://doi.org/10.1109/COMCAS.2009.5386081","url":null,"abstract":"We propose a new approach for the design of a cavity for atom vapor based devices, where atomic manipulation via two frequencies is required. The cavity provides a homogenous field at two different frequency bands −6.8GHz and 2MHz; the first frequency is supported by a cylindrical resonator with conductive walls and dielectric bases, the second frequency is applied from an external source and penetrates into the cavity by taking advantage of the skin effect phenomenon of the resonator thin metal walls. In the specific design presented here, the cavity contains a glass cell with Rubidium vapor and enables the two-photon manipulation of the 52S1/2 ground state manifold.","PeriodicalId":372928,"journal":{"name":"2009 IEEE International Conference on Microwaves, Communications, Antennas and Electronics Systems","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126700266","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 : 2009-11-01DOI: 10.1109/COMCAS.2009.5385973
L. H. Jones, N. Love
In terrestrial military networks quality of service (QoS) is a stochastic variable subject to the tyranny of the local environment. Thousands of man-years of effort have been expended in attempts to design more robust and reliable networks and to efficiently manage scarce spectrum resources. Software defined radio (SDR) and directional antennas are two key enabling technologies for improving radio communications. But simply attaching directional antennas to a conventional radio network will not significantly improve performance. Indeed, without the network providing critical pointing information, directional antennas would likely make performance worse while significantly increasing cost.
{"title":"Implications of directional antennas for mobile radio networks","authors":"L. H. Jones, N. Love","doi":"10.1109/COMCAS.2009.5385973","DOIUrl":"https://doi.org/10.1109/COMCAS.2009.5385973","url":null,"abstract":"In terrestrial military networks quality of service (QoS) is a stochastic variable subject to the tyranny of the local environment. Thousands of man-years of effort have been expended in attempts to design more robust and reliable networks and to efficiently manage scarce spectrum resources. Software defined radio (SDR) and directional antennas are two key enabling technologies for improving radio communications. But simply attaching directional antennas to a conventional radio network will not significantly improve performance. Indeed, without the network providing critical pointing information, directional antennas would likely make performance worse while significantly increasing cost.","PeriodicalId":372928,"journal":{"name":"2009 IEEE International Conference on Microwaves, Communications, Antennas and Electronics Systems","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114313714","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 : 2009-11-01DOI: 10.1109/COMCAS.2009.5386053
J. Rautio
A new technique using a dual mode “RA resonator” to measure uniaxial anisotropy in planar substrates is applied to Rogers RO3010 material. When this technique was previously applied to FR-4, an unexpected result (a horizontal dielectric constant less than the vertical dielectric constant) was obtained. It is hypothesized that the unexpected result is due to the fact that FR-4 is inhomogeneous. For example the glass fiber weave embedded in the FR-4 epoxy is not uniformly distributed. To test this hypothesis, similar measurements are performed on Rogers RO3010 material, which is strongly anisotropic, perfectly homogeneous, and is known from independent measurements to have a horizontal dielectric constant greater than the vertical. Several modifications to the original RA resonator that increase the frequency range over which useful measurements can be acquired are described and demonstrated.
{"title":"Measurement of uniaxial anisotropy in Rogers RO3010 substrate material","authors":"J. Rautio","doi":"10.1109/COMCAS.2009.5386053","DOIUrl":"https://doi.org/10.1109/COMCAS.2009.5386053","url":null,"abstract":"A new technique using a dual mode “RA resonator” to measure uniaxial anisotropy in planar substrates is applied to Rogers RO3010 material. When this technique was previously applied to FR-4, an unexpected result (a horizontal dielectric constant less than the vertical dielectric constant) was obtained. It is hypothesized that the unexpected result is due to the fact that FR-4 is inhomogeneous. For example the glass fiber weave embedded in the FR-4 epoxy is not uniformly distributed. To test this hypothesis, similar measurements are performed on Rogers RO3010 material, which is strongly anisotropic, perfectly homogeneous, and is known from independent measurements to have a horizontal dielectric constant greater than the vertical. Several modifications to the original RA resonator that increase the frequency range over which useful measurements can be acquired are described and demonstrated.","PeriodicalId":372928,"journal":{"name":"2009 IEEE International Conference on Microwaves, Communications, Antennas and Electronics Systems","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126330550","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 : 2009-11-01DOI: 10.1109/COMCAS.2009.5386059
Maya Gershon
This presentation will address the perceived quality of video services and the key challenges that impact IPTV performance. We will explain how to measure the many factors that influence IPTV Quality of Experience (QoE) in Triple Play networks including: ▪ Quantification of the quality of streamed video and audio content; ▪ Automated testing of channel zapping time; ▪ Challenges of reliability. We discuss and assess techniques for evaluating the performance of IPTV and Triple Play devices such as DSLAMs, B-RASs, service / edge routers, firewalls and others.
本报告将讨论视频服务的感知质量和影响IPTV性能的主要挑战。我们将解释如何测量影响三重播放网络中IPTV体验质量(QoE)的许多因素，包括:▪流媒体视频和音频内容质量的量化;▪自动测试通道切换时间;▪可靠性的挑战。我们讨论和评估评估IPTV和三重播放设备(如dslam, b - ras，服务/边缘路由器，防火墙等)性能的技术。
{"title":"A perspective on quality of experience and quality of service parameters in IPTV","authors":"Maya Gershon","doi":"10.1109/COMCAS.2009.5386059","DOIUrl":"https://doi.org/10.1109/COMCAS.2009.5386059","url":null,"abstract":"This presentation will address the perceived quality of video services and the key challenges that impact IPTV performance. We will explain how to measure the many factors that influence IPTV Quality of Experience (QoE) in Triple Play networks including: ▪ Quantification of the quality of streamed video and audio content; ▪ Automated testing of channel zapping time; ▪ Challenges of reliability. We discuss and assess techniques for evaluating the performance of IPTV and Triple Play devices such as DSLAMs, B-RASs, service / edge routers, firewalls and others.","PeriodicalId":372928,"journal":{"name":"2009 IEEE International Conference on Microwaves, Communications, Antennas and Electronics Systems","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132990769","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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