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

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

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

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

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

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

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

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

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

Antenna placement for sensing buried objects by radio frequency lateral waves 用射频侧波感应埋地物体的天线布置

Proceedings of the IEEE 2009 National Aerospace & Electronics Conference (NAECON) Pub Date : 2009-07-21 DOI: 10.1109/NAECON.2009.5426633

P. Sotirelis, Tiffany Wang, Jesse Butler

引用次数: 0

A signals of opportunity based cooperative navigation network 基于机会信号的协同导航网络

Proceedings of the IEEE 2009 National Aerospace & Electronics Conference (NAECON) Pub Date : 2009-07-21 DOI: 10.1109/NAECON.2009.5426626

M. A. Enright, C. Kurby

{"title":"A signals of opportunity based cooperative navigation network","authors":"M. A. Enright, C. Kurby","doi":"10.1109/NAECON.2009.5426626","DOIUrl":"https://doi.org/10.1109/NAECON.2009.5426626","url":null,"abstract":"With the advent of advanced wireless standards has come the ability to address more sophisticated problems. One such issue is to provide robust navigation in challenging environments. Our approach to develop a signals of opportunity (SoOP) based cooperative navigation network that has the potential to provide improved performance and extend coverage under a variety of difficult conditions from jamming to multipath fading. Under the premise that GPS is not always available, we employ SoOP as the core of this radionavigation system. A critical advantage of signals of opportunity is that they are more abundant and of significantly higher received signal power than other GNSS signals. There are many signals that are available but not all meet the requirements of robust navigation. Of particular importance are digital television (DTV), AM radio, and 3G cellular signals. Our basic premise is to implement these signals to provide geolocation capability using time difference of arrival (TDOA) which requires cooperation among users. We extend these concepts further to the development of a cooperative network that can be used to provide coverage to users outside the range of the navigation signals. We also demonstrate that cooperation can be used to mitigate the effects of multipath fading and provide simulation results.","PeriodicalId":305765,"journal":{"name":"Proceedings of the IEEE 2009 National Aerospace & Electronics Conference (NAECON)","volume":"10 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":"116873051","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: 18