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A Non-Linear Flash Analog to Digital Architecture for Sinusoidal Input Signals 一种用于正弦输入信号的非线性Flash模拟数字结构
2008 IEEE National Aerospace and Electronics Conference Pub Date : 2008-07-16 DOI: 10.1109/NAECON.2008.4806521
C. Berdanier, J. Scanlan
{"title":"A Non-Linear Flash Analog to Digital Architecture for Sinusoidal Input Signals","authors":"C. Berdanier, J. Scanlan","doi":"10.1109/NAECON.2008.4806521","DOIUrl":"https://doi.org/10.1109/NAECON.2008.4806521","url":null,"abstract":"We hypothesize that we can improve the footprint by using a static non-linear flash encoding scheme for Analog to Digital (A/D) converters for an important set of functions. This architecture can reduce the number of comparators and resisters in a flash converter by 25%..","PeriodicalId":254758,"journal":{"name":"2008 IEEE National Aerospace and Electronics Conference","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127845473","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}
引用次数: 1
A Schering Bridge Circuit for A Varactor Based Sensor Application 一种用于变容管传感器的先灵桥电路
2008 IEEE National Aerospace and Electronics Conference Pub Date : 2008-07-16 DOI: 10.1109/NAECON.2008.4806578
E. Jones, A. Fitzsimmons, B. Fortener, M. Patterson, G. Subramanyam
{"title":"A Schering Bridge Circuit for A Varactor Based Sensor Application","authors":"E. Jones, A. Fitzsimmons, B. Fortener, M. Patterson, G. Subramanyam","doi":"10.1109/NAECON.2008.4806578","DOIUrl":"https://doi.org/10.1109/NAECON.2008.4806578","url":null,"abstract":"The purpose of this research was to produce a concept for a wireless capacitive sensor application using a ferroelectric thin film based varactor. The varactor is based on the nonlinear tunability of Ba0.6Sr0.4TiO3 (BST). A Schering bridge circuit is utilized for this study, for optimizing the output response.","PeriodicalId":254758,"journal":{"name":"2008 IEEE National Aerospace and Electronics Conference","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130489425","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}
引用次数: 1
Wideband Phased Array Antennas 宽带相控阵天线
2008 IEEE National Aerospace and Electronics Conference Pub Date : 2008-07-16 DOI: 10.1109/NAECON.2008.4806537
A. Ferendeci, P. Zhang
{"title":"Wideband Phased Array Antennas","authors":"A. Ferendeci, P. Zhang","doi":"10.1109/NAECON.2008.4806537","DOIUrl":"https://doi.org/10.1109/NAECON.2008.4806537","url":null,"abstract":"Slotted spiral antennas with a ground plane are designed to cover the frequency range 0.5-18 GHz. Various antennas incorporating Archemidan slotted spirals with a ground plane and dielectric thickness less than 100 um were designed, processed and tested at different frequency ranges using conventional PCBs as well as vertically interconnected and monolithically (MMIC) processed versions. One of the major problems associated with incorporating these radiating elements that cover such a wide frequency range is the physical spacing of the antennas in phased array placements and the resulting beam steering by the application of the phase shifts to the corresponding antennas. Major side lobes appear because of the fixed physical separation of the antennas and these become more problematic when beam steering is applied through phase shifters. Properties of the Archimedean slotted spiral antennas with ground plane and with very thin dielectric layers will be presented and the problems and possible solutions associated with using these widebandwidth elements in a phase array will be presented.","PeriodicalId":254758,"journal":{"name":"2008 IEEE National Aerospace and Electronics Conference","volume":"2010 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130788710","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}
引用次数: 3
Integration of Vision based SLAM and Nonlinear Filter for Simple Mobile Robot Navigation 基于视觉SLAM和非线性滤波的简单移动机器人导航集成
2008 IEEE National Aerospace and Electronics Conference Pub Date : 2008-07-16 DOI: 10.1109/NAECON.2008.4806575
D. Won, Young Jae Lee, S. Sung, T. Kang
{"title":"Integration of Vision based SLAM and Nonlinear Filter for Simple Mobile Robot Navigation","authors":"D. Won, Young Jae Lee, S. Sung, T. Kang","doi":"10.1109/NAECON.2008.4806575","DOIUrl":"https://doi.org/10.1109/NAECON.2008.4806575","url":null,"abstract":"Simultaneous Localization and Mapping (SLAM) is a widely used technique which can build up a map at unknown environment and figure out its position without prior map information. By applying SLAM method, this paper presents simple integrated navigation system for planar mobile robot equipped with vision sensor and encoders. Because of the nonlinearity of the measurement model, it is used a particle filter which has powerful performance under nonlinear and multi-modal conditions. Finally, the DR (dead reckoning) performance is demonstrated by analyzing the variance of estimated position error when the number of particles and feature points are changed.","PeriodicalId":254758,"journal":{"name":"2008 IEEE National Aerospace and Electronics Conference","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114221363","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}
引用次数: 6
Performance Analysis of Large Cylindrical Arrays Comprised of Subarray Panels 子阵列面板组成的大型圆柱阵列的性能分析
2008 IEEE National Aerospace and Electronics Conference Pub Date : 2008-07-16 DOI: 10.1109/NAECON.2008.4806514
T. Morton, R. Marhefka
{"title":"Performance Analysis of Large Cylindrical Arrays Comprised of Subarray Panels","authors":"T. Morton, R. Marhefka","doi":"10.1109/NAECON.2008.4806514","DOIUrl":"https://doi.org/10.1109/NAECON.2008.4806514","url":null,"abstract":"Using classical array theory this paper presents directivity, sidelobe, and bandwidth performance analysis over narrow and wide bandwidths in the microwave frequency region for several large cylindrical array configurations comprised of panel subarrays. The degree of main beam spreading, grating lobe levels, and directivity loss is presented for several designs involving trade-offs between true time delay beam scanning and phase shifter beam scanning. It is also shown that the grating lobes may be reduced with an amplitude taper across the array.","PeriodicalId":254758,"journal":{"name":"2008 IEEE National Aerospace and Electronics Conference","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125365288","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}
引用次数: 0
Synthesizing FPGA Digital Modules for Software Defined Radio 软件无线电中FPGA数字模块的合成
2008 IEEE National Aerospace and Electronics Conference Pub Date : 2008-07-16 DOI: 10.1109/NAECON.2008.4806572
J. DeGroat, G. Reehal, S. Nagarjuna
{"title":"Synthesizing FPGA Digital Modules for Software Defined Radio","authors":"J. DeGroat, G. Reehal, S. Nagarjuna","doi":"10.1109/NAECON.2008.4806572","DOIUrl":"https://doi.org/10.1109/NAECON.2008.4806572","url":null,"abstract":"Software defined radio (SDR) has gained much interest in recent years due to the advancements in FPGA technology. FPGA provides the capability of programming analog components (Mixers, PLL, Filters etc...) which were traditionally implemented in hardware. In this paper digital functional blocks that need to be programmed in FPGA core are designed and simulated using Matlab for amplitude demodulation for double side band (DSB) with carrier, double side band with suppressed carrier (DSB-SC) and Single side band with suppressed carrier (SSB-SC). Sampling frequency of 4 MHz is selected to ensure that sampling rate is greater than twice of maximum commercially available AM carrier frequency (of 1720 kHz) and carrier frequency of 610 kHz is used for simulations. This simulation result concludes the proper operation of the design.","PeriodicalId":254758,"journal":{"name":"2008 IEEE National Aerospace and Electronics Conference","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117125057","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}
引用次数: 8
Mutual Information Metric Evaluation for PET/MRI Image Fusion PET/MRI图像融合的互信息度量评价
2008 IEEE National Aerospace and Electronics Conference Pub Date : 2008-07-16 DOI: 10.1109/NAECON.2008.4806563
S. Gupta, K. P. Ramesh, E. Blasch
{"title":"Mutual Information Metric Evaluation for PET/MRI Image Fusion","authors":"S. Gupta, K. P. Ramesh, E. Blasch","doi":"10.1109/NAECON.2008.4806563","DOIUrl":"https://doi.org/10.1109/NAECON.2008.4806563","url":null,"abstract":"Image fusion developments has paved way for new approaches like image overlay, image sharpening, and image cueing through pixel, feature, or region/shape combinations. The applicability of these new techniques differs on the image content, contextual information, and generalized metrics of image fusion gain. An image fusion gain can be assessed relative to information gain or entropy reduction. In this paper, we are interested in exploring the performance metric evaluation of the fused images. The metric evaluation method for the fused image is done by studying the mutual information content of the images of interest. The registered MR/PET images are used for demonstration. Mutual Information is proposed as an information measure for evaluating image fusion performance. The proposed measure represents how information obtained from the fused image can be used to assess the information of different image fusion algorithms. The results show that the measure is meaningful and explicit.","PeriodicalId":254758,"journal":{"name":"2008 IEEE National Aerospace and Electronics Conference","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133529784","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}
引用次数: 35
Attribute Based Access Control and Security for Collaboration Environments 基于属性的协作环境访问控制与安全
2008 IEEE National Aerospace and Electronics Conference Pub Date : 2008-07-16 DOI: 10.1109/NAECON.2008.4806511
Jian Zhu, W. Smari
{"title":"Attribute Based Access Control and Security for Collaboration Environments","authors":"Jian Zhu, W. Smari","doi":"10.1109/NAECON.2008.4806511","DOIUrl":"https://doi.org/10.1109/NAECON.2008.4806511","url":null,"abstract":"Proliferation of collaboration environments brings new issues to the area of security. In this paper, we briefly describe the characteristics of security associated with collaboration environments. We also discuss and analyze several schemes in different areas of security, including access control, secure group communication, and security management. Another contribution of this paper is a proposed access control model with more flexibility and ability to address trust and privacy preserving issues based on attributes.","PeriodicalId":254758,"journal":{"name":"2008 IEEE National Aerospace and Electronics Conference","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123511016","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}
引用次数: 19
Strategic Challenges for Application Development Productivity in Reconfigurable Computing 可重构计算中应用程序开发生产力的战略挑战
2008 IEEE National Aerospace and Electronics Conference Pub Date : 2008-07-16 DOI: 10.1109/NAECON.2008.4806548
S. Merchant, B. Holland, C. Reardon, A. George, H. Lam, G. Stitt, M.C. Smith, N. Alam, I. González, E. El-Araby, P. Saha, T. El-Ghazawi, H. Simmler
{"title":"Strategic Challenges for Application Development Productivity in Reconfigurable Computing","authors":"S. Merchant, B. Holland, C. Reardon, A. George, H. Lam, G. Stitt, M.C. Smith, N. Alam, I. González, E. El-Araby, P. Saha, T. El-Ghazawi, H. Simmler","doi":"10.1109/NAECON.2008.4806548","DOIUrl":"https://doi.org/10.1109/NAECON.2008.4806548","url":null,"abstract":"Performance and versatility requirements arising from escalating fabrication costs and design complexities are making reconfigurable computing technologies increasingly advantageous on the roadmap towards many-core technologies. This reformation in device architectures is necessitating a critical reformation in application design methods to bridge the widening semantic gap between design productivity and execution efficiency. This paper explores the strategic challenges in FPGA design methodologies and evaluates potential solutions and their impact on future DoD applications and users. A new research initiative, strategic infrastructure for reconfigurable computing applications (SIRCA), has also been proposed as a potential new DARPA program to address the FPGA productivity problem.","PeriodicalId":254758,"journal":{"name":"2008 IEEE National Aerospace and Electronics Conference","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125467694","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}
引用次数: 16
Entropy Selective Mutual Information-Based Image Registration 基于熵选择互信息的图像配准
2008 IEEE National Aerospace and Electronics Conference Pub Date : 2008-07-16 DOI: 10.1109/NAECON.2008.4806542
H. Karvir, J. A. Skipper, D. Repperger
{"title":"Entropy Selective Mutual Information-Based Image Registration","authors":"H. Karvir, J. A. Skipper, D. Repperger","doi":"10.1109/NAECON.2008.4806542","DOIUrl":"https://doi.org/10.1109/NAECON.2008.4806542","url":null,"abstract":"Multimodal imaging systems demand sophisticated registration routines. Due to computation time and non-convergence issues, the use of traditional mutual information (MI)-based registration is impractical. We propose our sampling optimization technique with selective high entropy MI computation as a rapid and robust image registration method for real-time applications.","PeriodicalId":254758,"journal":{"name":"2008 IEEE National Aerospace and Electronics Conference","volume":"43 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117325215","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}
引用次数: 3
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