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A tight threshold for noise eigenvalues in superresolution 超分辨率噪声特征值的严格阈值
1986 Antennas and Propagation Society International Symposium Pub Date : 1986-06-08 DOI: 10.1109/APS.1986.1149593
K. Lee, J. Herper
{"title":"A tight threshold for noise eigenvalues in superresolution","authors":"K. Lee, J. Herper","doi":"10.1109/APS.1986.1149593","DOIUrl":"https://doi.org/10.1109/APS.1986.1149593","url":null,"abstract":"INTRODUCTION Identification of principal and noise eigenvalues in the eigenvalue/vector decomposition of a covariance matrix is an essential part of superresolution techniques such as MUSIC and PEGS (1). Target counting is decided directly by the number of principal eigenvalues chosen from the total set of eigenvalues. The resultant resolution pattern can be affected by the appearance of spurious peaks or the disappearance of real peaks if the eigenvalues are not properly identified. Curvefit methods customarily adopted to discriminate principal from noise eigenvalues fail when targets are so close that there is no significant slope change in the transition from noise eigenvalues to the least principal eigenvalue. Once the boundary between principal and noise eigenvalues is blurred, a superresolution technique based on the eigenvalue/vector decomposition of a covariance matrix loses its resolution capability.","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127476006","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 Ku/Ka band dichroic subreflector development Ku/Ka波段二向色副反射镜的研制
1986 Antennas and Propagation Society International Symposium Pub Date : 1986-06-08 DOI: 10.1109/APS.1986.1149611
P. Bielli, D. Bresciani, S. Contu, G. Crone
{"title":"A Ku/Ka band dichroic subreflector development","authors":"P. Bielli, D. Bresciani, S. Contu, G. Crone","doi":"10.1109/APS.1986.1149611","DOIUrl":"https://doi.org/10.1109/APS.1986.1149611","url":null,"abstract":"","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124370212","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 compact multi-flare horn design for spacecraft reflector antenna 一种用于航天器反射天线的紧凑型多耀斑喇叭设计
1986 Antennas and Propagation Society International Symposium Pub Date : 1986-06-08 DOI: 10.1109/APS.1986.1149694
C. Chen, Y. Choung, D. Palma
{"title":"A compact multi-flare horn design for spacecraft reflector antenna","authors":"C. Chen, Y. Choung, D. Palma","doi":"10.1109/APS.1986.1149694","DOIUrl":"https://doi.org/10.1109/APS.1986.1149694","url":null,"abstract":"","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122458206","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: 4
A comparison of the continuous gaussian antenna with the discrete binomial array 连续高斯天线与离散二项阵列的比较
1986 Antennas and Propagation Society International Symposium Pub Date : 1986-06-08 DOI: 10.1109/APS.1986.1149673
J. Coughlin, A. Krall, D. Jablonski
{"title":"A comparison of the continuous gaussian antenna with the discrete binomial array","authors":"J. Coughlin, A. Krall, D. Jablonski","doi":"10.1109/APS.1986.1149673","DOIUrl":"https://doi.org/10.1109/APS.1986.1149673","url":null,"abstract":"","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131541546","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
Dielectric spectroscopy using monopole antennas of general electrical length 使用一般电长度的单极天线的介电光谱
1986 Antennas and Propagation Society International Symposium Pub Date : 1986-06-08 DOI: 10.1109/APS.1986.1149749
W. Scott, Glenn S. Smith
{"title":"Dielectric spectroscopy using monopole antennas of general electrical length","authors":"W. Scott, Glenn S. Smith","doi":"10.1109/APS.1986.1149749","DOIUrl":"https://doi.org/10.1109/APS.1986.1149749","url":null,"abstract":"A procedure is developed for measuring the complex dielectric permittivity of a material over a broad range of frequencies using a monopole antenna. No restrictions are placed on the electrical size of the antenna. The antenna is calibrated one time by measuring the input admittance in a standard medium with known permittivity, such as air. Next, the admittance is measured with the antenna immersed in a material with unknown permittivity. These two sets of admittances are then used to determine the permittivity of the material. As an application of the procedure, the complex permittivity of the alcohol 1-butanol and saline solutions were measured using a cylindrical monopole antenna. The measured permittivities are in good agreement with those determined by previous investigators.","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"57-58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120981176","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
Comparison of algorithms to solve sparse matrix in EM scattering problem EM散射问题中稀疏矩阵求解算法的比较
1986 Antennas and Propagation Society International Symposium Pub Date : 1986-06-08 DOI: 10.1109/APS.1986.1149737
J. Kiang, J. Kong, D. Shnidman
{"title":"Comparison of algorithms to solve sparse matrix in EM scattering problem","authors":"J. Kiang, J. Kong, D. Shnidman","doi":"10.1109/APS.1986.1149737","DOIUrl":"https://doi.org/10.1109/APS.1986.1149737","url":null,"abstract":"In applying the method of moments to solve the EM scattering problems, it is necessary to solve a large matrix when the dimension of the scatterer is larger than several wavelengths. Tremendous amount of computer CPU time will be spent on solving the matrix equation. When only the far field properties such as scattering cross section is of interest, we can use the sparse matrix technique to reduce the amount of compucation. In this paper, some algorithms are compared to solve the sparse matrix. The Gaussian elimina$ion algorithm, Cholesky decomposition algorithm, several versions of conjugate gradient methods are used. The number of multiplications and divisions(fl0ps) are counted for comparing the efficiency of these algorithms. The effect of the nonzero element positions to the efficiency is also studied by defining the clustering index.","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129959869","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 mathematical model of the interaction of monochromatic light-frequency electromagnetic radiation with the eye permitting computer-aided. noninvasive assessment of visual acuity and an analysis of the effect of chemical and other stressors on the spread function 允许计算机辅助的单色光频率电磁辐射与眼睛相互作用的数学模型。无创视力评估及化学及其他应激源对扩散功能影响的分析
1986 Antennas and Propagation Society International Symposium Pub Date : 1986-06-08 DOI: 10.1109/APS.1986.1149685
D. Cohoon
{"title":"A mathematical model of the interaction of monochromatic light-frequency electromagnetic radiation with the eye permitting computer-aided. noninvasive assessment of visual acuity and an analysis of the effect of chemical and other stressors on the spread function","authors":"D. Cohoon","doi":"10.1109/APS.1986.1149685","DOIUrl":"https://doi.org/10.1109/APS.1986.1149685","url":null,"abstract":"","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130004313","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
Radiation pattern analysis of coaxial cavity feed horn 同轴腔馈电喇叭的辐射方向图分析
1986 Antennas and Propagation Society International Symposium Pub Date : 1986-06-08 DOI: 10.1109/APS.1986.1149637
Changsik Kim, A. Rhoden
{"title":"Radiation pattern analysis of coaxial cavity feed horn","authors":"Changsik Kim, A. Rhoden","doi":"10.1109/APS.1986.1149637","DOIUrl":"https://doi.org/10.1109/APS.1986.1149637","url":null,"abstract":"","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127064577","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: 7
Scattering from an array of thin wires parallel to a rectangular ground plane 平行于矩形地平面的细导线阵列的散射
1986 Antennas and Propagation Society International Symposium Pub Date : 1986-06-08 DOI: 10.1109/APS.1986.1149688
D. Jenn
{"title":"Scattering from an array of thin wires parallel to a rectangular ground plane","authors":"D. Jenn","doi":"10.1109/APS.1986.1149688","DOIUrl":"https://doi.org/10.1109/APS.1986.1149688","url":null,"abstract":"","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134033164","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 differential equation formulation for radiation problems based on the continuity gauge instead of the Lorentz gauge 基于连续性规范代替洛伦兹规范的辐射问题微分方程公式
1986 Antennas and Propagation Society International Symposium Pub Date : 1986-06-08 DOI: 10.1109/APS.1986.1149646
A. Konrad
{"title":"A differential equation formulation for radiation problems based on the continuity gauge instead of the Lorentz gauge","authors":"A. Konrad","doi":"10.1109/APS.1986.1149646","DOIUrl":"https://doi.org/10.1109/APS.1986.1149646","url":null,"abstract":"","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":" 15","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132159669","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
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