发布求助
文献互助 智能选刊 最新文献

Proceedings of the IEEE 2009 National Aerospace & Electronics Conference (NAECON)最新文献

筛选
英文 中文
Sub-mm wave imaging techniques for non-destructive aerospace materials evaluation 无损航空航天材料评价的亚毫米波成像技术
Proceedings of the IEEE 2009 National Aerospace & Electronics Conference (NAECON) Pub Date : 2010-08-19 DOI: 10.1109/MAES.2010.5552608
I. Kemp, M. Peterson, C. Benton, D. Petkie
{"title":"Sub-mm wave imaging techniques for non-destructive aerospace materials evaluation","authors":"I. Kemp, M. Peterson, C. Benton, D. Petkie","doi":"10.1109/MAES.2010.5552608","DOIUrl":"https://doi.org/10.1109/MAES.2010.5552608","url":null,"abstract":"A millimeter and sub-millimeter continuous wave system has been used to image corrosion pitting, structural defects, and heat damage in common aircraft materials such as aluminum and polyamides. In order to avoid failure of components during operation, many aircraft parts are replaced earlier than necessary leading to higher costs that could be reduced if the degree of damage in the component material could be determined non-destructively. Millimeter and Sub-millimeter waves are ideally suited for this purpose because of their ability to penetrate through dielectric substances and obscurants such as paint, oil, and epoxy commonly found on the surfaces of aircraft.","PeriodicalId":305765,"journal":{"name":"Proceedings of the IEEE 2009 National Aerospace & Electronics Conference (NAECON)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131076852","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: 11
New sequence switching and layout technique for high-speed high-accuracy current-steering DACs 高速高精度电流转向dac的时序切换与布局新技术
Proceedings of the IEEE 2009 National Aerospace & Electronics Conference (NAECON) Pub Date : 2009-07-21 DOI: 10.1109/NAECON.2009.5426618
Tao Zeng, Degang Chen
{"title":"New sequence switching and layout technique for high-speed high-accuracy current-steering DACs","authors":"Tao Zeng, Degang Chen","doi":"10.1109/NAECON.2009.5426618","DOIUrl":"https://doi.org/10.1109/NAECON.2009.5426618","url":null,"abstract":"In this paper, new sequence switching and layout techniques are presented for the design of high-speed high-accuracy current-steering DACs. Our new sequence switching technique—after-fabrication programmable switching— rearranges the switching sequence of current sources after chip fabrication, which will guarantee to generate an optimal switching sequence to achieve high static accuracy. With this implementation, the area will be reduced dramatically, which will result the reduced parasitic effect and improved dynamic performance. Moreover, the gradient effect will become much less significant. To reduce the gradient errors even more, a new layout technique is introduced.","PeriodicalId":305765,"journal":{"name":"Proceedings of the IEEE 2009 National Aerospace & Electronics Conference (NAECON)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125098717","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
Spectrum assignment in infrastructure based cognitive radio networks 基于认知无线电网络的频谱分配
Proceedings of the IEEE 2009 National Aerospace & Electronics Conference (NAECON) Pub Date : 2009-07-21 DOI: 10.1109/NAECON.2009.5426650
Zhang Tao, Bin Wang, Zhiqiang Wu
{"title":"Spectrum assignment in infrastructure based cognitive radio networks","authors":"Zhang Tao, Bin Wang, Zhiqiang Wu","doi":"10.1109/NAECON.2009.5426650","DOIUrl":"https://doi.org/10.1109/NAECON.2009.5426650","url":null,"abstract":"Spectrum assignment is an important research problem in cognitive radio networks. Different from the conventional spectrum assignment algorithms which are mainly designed for ad hoc networks, in this paper, a new spectrum assignment algorithm for infrastructure based cognitive radio networks is proposed. This algorithm aims at maximizing the average bandwidth per flow, and avoiding the spectrum waste by idle secondary basestations. We have performed packet-level simulation studies to compare the performance of our proposed algorithm with two graph-coloring based algorithms. The simulation results show that our algorithm can dramatically improve network throughput, decrease the average packet delay, and average packet drop ratio.","PeriodicalId":305765,"journal":{"name":"Proceedings of the IEEE 2009 National Aerospace & Electronics Conference (NAECON)","volume":"175 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122310887","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: 14
Parabolic approximation to EMA motion profiles 抛物线近似的EMA运动轮廓
Proceedings of the IEEE 2009 National Aerospace & Electronics Conference (NAECON) Pub Date : 2009-07-21 DOI: 10.1109/NAECON.2009.5426646
D. Woodburn, T. Wu, Q. Leland, N. Rolinski, L. Chow, B. Jordan
{"title":"Parabolic approximation to EMA motion profiles","authors":"D. Woodburn, T. Wu, Q. Leland, N. Rolinski, L. Chow, B. Jordan","doi":"10.1109/NAECON.2009.5426646","DOIUrl":"https://doi.org/10.1109/NAECON.2009.5426646","url":null,"abstract":"Parabolic curves fit physical trajectories well because of the inherent smoothness of inertial movement; and, with only a few parameters, they can fit complex paths far more effectively than linear approximations. This paper presents a method using parabolas to approximate the motion profiles to be used in driving an electromechanical aircraft actuator. This method allows the actuator to run longer tests more efficiently. The details of the scheme are explained with emphasis on its matrix manipulation and the fidelity of the approximation to the original, complex profile.","PeriodicalId":305765,"journal":{"name":"Proceedings of the IEEE 2009 National Aerospace & Electronics Conference (NAECON)","volume":"290 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117309622","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
Microcontroller based Multi-star simulator using Controller Area Network (CAN) 基于CAN的单片机多星模拟器
Proceedings of the IEEE 2009 National Aerospace & Electronics Conference (NAECON) Pub Date : 2009-07-21 DOI: 10.1109/NAECON.2009.5426637
S. Umamaheswaran, Santosh Nagendra
{"title":"Microcontroller based Multi-star simulator using Controller Area Network (CAN)","authors":"S. Umamaheswaran, Santosh Nagendra","doi":"10.1109/NAECON.2009.5426637","DOIUrl":"https://doi.org/10.1109/NAECON.2009.5426637","url":null,"abstract":"This paper presents a Multi star simulator which is an embedded system used in the ground testing of Star sensors meant for the precision attitude control of satellites. This system shall not only simulate star intensities precisely, but also control them with changing temperature much easily. In this system microcontroller is interfaced with a personal computer (host controller monitoring all the activities of the system) through a Controller Area Network (CAN). A program running in the host controller allows user to issue requests to the microcontroller to execute the above said functions through appropriate commands using versatile CAN communication. The major advantage of this instrument is that it maintains the intensities of the LEDs constant with varying temperature with minimal effort which clearly defines its edge over the existing system.","PeriodicalId":305765,"journal":{"name":"Proceedings of the IEEE 2009 National Aerospace & Electronics Conference (NAECON)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125976972","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
Angle of arrival measurement using wideband linear phased array 宽带线性相控阵到达角测量
Proceedings of the IEEE 2009 National Aerospace & Electronics Conference (NAECON) Pub Date : 2009-07-21 DOI: 10.1109/NAECON.2009.5426635
L. L. Liou, D. Lin, J. Tsui, J. Buck, M. Longbrake, J. McCann, P. Buxa, T. Dalrymple
{"title":"Angle of arrival measurement using wideband linear phased array","authors":"L. L. Liou, D. Lin, J. Tsui, J. Buck, M. Longbrake, J. McCann, P. Buxa, T. Dalrymple","doi":"10.1109/NAECON.2009.5426635","DOIUrl":"https://doi.org/10.1109/NAECON.2009.5426635","url":null,"abstract":"A radio frequency (RF) signal detection algorithm is developed based on two- dimensional Fast Fourier Transform (FFT) on phased array time series data. The sensitivity is calculated based on two-frame signal detection criterion. A collection system consisting of a linear phased array and multiple wideband digital receivers is utilized. Simulation results are presented based on the system parameters of the channelization frequency plan including the frequency range, LO, mixer, and sampling frequency. Experimental angle of arrival data are processed, and the results are shown to be in good agreement with the simulation results.","PeriodicalId":305765,"journal":{"name":"Proceedings of the IEEE 2009 National Aerospace & Electronics Conference (NAECON)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132996295","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
Cognitive processing for image registration in formation flying 编队飞行中图像配准的认知处理
Proceedings of the IEEE 2009 National Aerospace & Electronics Conference (NAECON) Pub Date : 2009-07-21 DOI: 10.1109/NAECON.2009.5426647
R. Ewing, G. Lamont, B. Kadrovach, M. D. Eyster, M. Talbert
{"title":"Cognitive processing for image registration in formation flying","authors":"R. Ewing, G. Lamont, B. Kadrovach, M. D. Eyster, M. Talbert","doi":"10.1109/NAECON.2009.5426647","DOIUrl":"https://doi.org/10.1109/NAECON.2009.5426647","url":null,"abstract":"This paper explores the cognitive domains of information, knowledge and intelligence for signal processing. Since the initial cognitive efforts into the field of multi-agent cooperation, research has begun to polarize in several different types of cooperation. The nature of image registration implies information processing that is cognitive in classifying sensory image data. Key functionality presented in this image registration flight control concept development technology roadmap include: image applications of neighborhood and formation algorithms; adaptive wavelet techniques for optimizing imagery transmission and processing; and application of emerging wavelet transformations for adaptive multiscale and multiresolution image applications.","PeriodicalId":305765,"journal":{"name":"Proceedings of the IEEE 2009 National Aerospace & Electronics Conference (NAECON)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126687810","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
Distortion weighting based on biorthogonal wavelet gain in JPEG2000 JPEG2000中基于双正交小波增益的失真加权
Proceedings of the IEEE 2009 National Aerospace & Electronics Conference (NAECON) Pub Date : 2009-07-21 DOI: 10.1109/NAECON.2009.5426631
B. Fortener, E. Balster
{"title":"Distortion weighting based on biorthogonal wavelet gain in JPEG2000","authors":"B. Fortener, E. Balster","doi":"10.1109/NAECON.2009.5426631","DOIUrl":"https://doi.org/10.1109/NAECON.2009.5426631","url":null,"abstract":"JPEG2000 is the latest standard in image compression with the Joint Photographic Experts Group (JPEG) committee ratifying Part 1, second edition of the standard in September 2004. The JPEG2000 compression system improves upon the original JPEG compression standard through the use of a wavelet transform and an Embedded Block Coding with Optimal Truncation (EBCOT) technique that allows for a compression advantage over JPEG of about 30 percent on average. EBCOT depends on an arithmetic entropy coder called the MQ Coder that processes data and outputs the final image bit-stream that is stored in a JPEG2000 file. After the MQ Coder, the bit-stream can be truncated at points defined during the encoding process, and this truncation may be done optimally to minimize the amount of distortion introduced to the decoded image. This optimal truncation relies on a distortion calculation for every bit that makes up an image. In order to properly calculate this bit-distortion, weights are applied to a squared-error calculation, scaling the resulting distortion in a manner that accounts for the gain associated with the biorthogonal wavelet transform used in JPEG2000. This paper gives a background on the derivation of these weights and where they are applied in the optimal truncation process.","PeriodicalId":305765,"journal":{"name":"Proceedings of the IEEE 2009 National Aerospace & Electronics Conference (NAECON)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134314021","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
A reconfigurable spiking neural network digital ASIC simulation and implementation 一种可重构尖峰神经网络数字ASIC仿真与实现
Proceedings of the IEEE 2009 National Aerospace & Electronics Conference (NAECON) Pub Date : 2009-07-21 DOI: 10.1109/NAECON.2009.5426614
Kevin Van Sickle, H. Abdel-Aty-Zohdy
{"title":"A reconfigurable spiking neural network digital ASIC simulation and implementation","authors":"Kevin Van Sickle, H. Abdel-Aty-Zohdy","doi":"10.1109/NAECON.2009.5426614","DOIUrl":"https://doi.org/10.1109/NAECON.2009.5426614","url":null,"abstract":"A reconfigurable spiking neural network is implemented in a 0.5µm CMOS digital tiny-chip. The connection weights are uploaded to registers on the ASIC. These weights are learned off-line, using combined simulated annealing and genetic algorithm. Large computational power and many simulations create small powerful networks that are adapted to interact with the environment. These configurations are swapped in and out of the ASIC to cope with varying situations and increase robustness. The network has been successfully tested with a simulated robot in a maze and can be extended for target recognition.","PeriodicalId":305765,"journal":{"name":"Proceedings of the IEEE 2009 National Aerospace & Electronics Conference (NAECON)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131289757","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
Rapid radio: A framework for human-assisted signal classification and receiver implementation 快速无线电:人为辅助信号分类和接收机实现的框架
Proceedings of the IEEE 2009 National Aerospace & Electronics Conference (NAECON) Pub Date : 2009-07-21 DOI: 10.1109/NAECON.2009.5426608
J. Surís, A. Recio, P. Athanas
{"title":"Rapid radio: A framework for human-assisted signal classification and receiver implementation","authors":"J. Surís, A. Recio, P. Athanas","doi":"10.1109/NAECON.2009.5426608","DOIUrl":"https://doi.org/10.1109/NAECON.2009.5426608","url":null,"abstract":"An analysis-based framework for the rapid development of a radio receiver for signals with unknown parameters is pro-posed, exploiting the reconfiguration capabilities of FPGAs. The framework guides a non-expert user through the process of signal classification and FPGA-based receiver implementation. System efficiency is traded off with implementation time in order to allow fast radio creation. A set of high-level transformations are applied to the unknown signal based on different hypothesis about the modulation scheme. The results of the transformations are presented to the user, who can steer the process of analysis. The parameters of the radio are then mapped by means of an Implementation Engine to modules implemented in a general purpose FPGA-based receiver.","PeriodicalId":305765,"journal":{"name":"Proceedings of the IEEE 2009 National Aerospace & Electronics Conference (NAECON)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132963384","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: 2
下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信