Pub Date : 2014-06-24DOI: 10.1109/NAECON.2014.7045816
A. Ferendeci
A new geometrical configuration of a widebandwidth thin slotted antenna with a ground plane is introduced that can be conformally placed on any arbitrary surface. Special geometries are chosen to reduce the corresponding surface area of the antenna for low frequency applications. The parameters associated with antenna, its response as a function of frequency and its possible application areas are presented.
{"title":"Small size planar widebandwidth antennas","authors":"A. Ferendeci","doi":"10.1109/NAECON.2014.7045816","DOIUrl":"https://doi.org/10.1109/NAECON.2014.7045816","url":null,"abstract":"A new geometrical configuration of a widebandwidth thin slotted antenna with a ground plane is introduced that can be conformally placed on any arbitrary surface. Special geometries are chosen to reduce the corresponding surface area of the antenna for low frequency applications. The parameters associated with antenna, its response as a function of frequency and its possible application areas are presented.","PeriodicalId":318539,"journal":{"name":"NAECON 2014 - IEEE National Aerospace and Electronics Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125727826","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 : 2014-06-24DOI: 10.1109/NAECON.2014.7045827
V. Sanphuang, N. Ghalichechian, N. Nahar, J. Volakis
We propose phase-change materials (PCMs) to demonstrate the reconfigurablility of THz filter. Here vanadium dioxide (VO2) is studied since it shows insulator-to-metal transition properties at temperature of 70 °C. A broadband ON/OFF filter using frequency selective surfaces (FSS) integrated with VO2 is designed to improve selectivity of THz sensing devices. Simulation and measurement results show an excellent agreement in frequency range of 0.1 - 1 THz. Transmission is centered around 0.55 THz below 70 °C and is cut off when the filter is heated above 70 °C. Therefore, ON/OFF switching in filters is achieved by employing VO2.
{"title":"Phase-change material for reconfigurability in THz band","authors":"V. Sanphuang, N. Ghalichechian, N. Nahar, J. Volakis","doi":"10.1109/NAECON.2014.7045827","DOIUrl":"https://doi.org/10.1109/NAECON.2014.7045827","url":null,"abstract":"We propose phase-change materials (PCMs) to demonstrate the reconfigurablility of THz filter. Here vanadium dioxide (VO2) is studied since it shows insulator-to-metal transition properties at temperature of 70 °C. A broadband ON/OFF filter using frequency selective surfaces (FSS) integrated with VO2 is designed to improve selectivity of THz sensing devices. Simulation and measurement results show an excellent agreement in frequency range of 0.1 - 1 THz. Transmission is centered around 0.55 THz below 70 °C and is cut off when the filter is heated above 70 °C. Therefore, ON/OFF switching in filters is achieved by employing VO2.","PeriodicalId":318539,"journal":{"name":"NAECON 2014 - IEEE National Aerospace and Electronics Conference","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122288517","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 : 2014-06-24DOI: 10.1109/NAECON.2014.7045836
C. Devlin, R. Ewing, E. Guliants
Most carbon nanomaterials are touted for their unusual conductive or semiconductive properties. In this paper, we compare the many-layered graphene oxide (GO) and GO-silver nanocomposite “papers” to elucidate their unusual resistive properties. We have observed significant nonlinearities in resistivity, its dependence on temperature, and current-induced effects on the resistivity of these materials.
{"title":"Resistivity comparison of graphene oxide and graphene oxide-silver nanocomposite paper","authors":"C. Devlin, R. Ewing, E. Guliants","doi":"10.1109/NAECON.2014.7045836","DOIUrl":"https://doi.org/10.1109/NAECON.2014.7045836","url":null,"abstract":"Most carbon nanomaterials are touted for their unusual conductive or semiconductive properties. In this paper, we compare the many-layered graphene oxide (GO) and GO-silver nanocomposite “papers” to elucidate their unusual resistive properties. We have observed significant nonlinearities in resistivity, its dependence on temperature, and current-induced effects on the resistivity of these materials.","PeriodicalId":318539,"journal":{"name":"NAECON 2014 - IEEE National Aerospace and Electronics Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131965241","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 : 2014-06-24DOI: 10.1109/NAECON.2014.7045784
L. Liou, D. Lin, Ethan Lin, C. Chen
The wideband coverage of the traditional FFT-based electronic warfare (EW) receiver is limited by the sampling frequency of the analog-to-digital converter (ADC). Compressed sensing (CS) based wideband EW digital receiver has been proposed and under development to process wideband sparse signals with reduced sampling rate. In this study, we calculate the sensitivity of a CS based EW receiver. Two modulation schemes of CS are used. One is pseudorandom chip (PRC) and the other is non-uniform sampling (NUS) modulation. The orthogonal matching pursuit (OMP) algorithm is used to process CS data. The insufficient nature of the sparcity of the signal adversely affects the signal detection probability for both PRC and NUS modulation schemes. Methods to remedy this problem in both modulation schemes are proposed. The improvement in the signal detection and thus the sensitivity performance of the CS based receiver are presented.
{"title":"Sensitivity simulation of compressed sensing based EW receiver using orthogonal matching pursuit algorithm","authors":"L. Liou, D. Lin, Ethan Lin, C. Chen","doi":"10.1109/NAECON.2014.7045784","DOIUrl":"https://doi.org/10.1109/NAECON.2014.7045784","url":null,"abstract":"The wideband coverage of the traditional FFT-based electronic warfare (EW) receiver is limited by the sampling frequency of the analog-to-digital converter (ADC). Compressed sensing (CS) based wideband EW digital receiver has been proposed and under development to process wideband sparse signals with reduced sampling rate. In this study, we calculate the sensitivity of a CS based EW receiver. Two modulation schemes of CS are used. One is pseudorandom chip (PRC) and the other is non-uniform sampling (NUS) modulation. The orthogonal matching pursuit (OMP) algorithm is used to process CS data. The insufficient nature of the sparcity of the signal adversely affects the signal detection probability for both PRC and NUS modulation schemes. Methods to remedy this problem in both modulation schemes are proposed. The improvement in the signal detection and thus the sensitivity performance of the CS based receiver are presented.","PeriodicalId":318539,"journal":{"name":"NAECON 2014 - IEEE National Aerospace and Electronics Conference","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131340306","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 : 2014-06-24DOI: 10.1109/NAECON.2014.7045842
K. Vittala, M. Niamat, S. Vemuru
The reduction in the transistor and interconnect dimensions have a severe impact on the reliable performance of the Field Programmable Gate Array (FPGA) circuits. The process variation effects in nanometer scale technologies result in transient errors or permanent failures that cause undesired behavior of the circuit. In this work, we analyze a method for fault identification to mitigate the impact of lifetime failures such as Electro-migration (EM) and Hot Carrier Effect (HCE) in interconnect of the FPGA. This method is based on the signal delays in routing resources that include switch blocks and interconnect wires.
{"title":"Early lifetime failure detection in FPGAs using delay faults","authors":"K. Vittala, M. Niamat, S. Vemuru","doi":"10.1109/NAECON.2014.7045842","DOIUrl":"https://doi.org/10.1109/NAECON.2014.7045842","url":null,"abstract":"The reduction in the transistor and interconnect dimensions have a severe impact on the reliable performance of the Field Programmable Gate Array (FPGA) circuits. The process variation effects in nanometer scale technologies result in transient errors or permanent failures that cause undesired behavior of the circuit. In this work, we analyze a method for fault identification to mitigate the impact of lifetime failures such as Electro-migration (EM) and Hot Carrier Effect (HCE) in interconnect of the FPGA. This method is based on the signal delays in routing resources that include switch blocks and interconnect wires.","PeriodicalId":318539,"journal":{"name":"NAECON 2014 - IEEE National Aerospace and Electronics Conference","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127981779","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 : 2014-06-24DOI: 10.1109/NAECON.2014.7045776
J. Vella, V. Vasilyev, J. Goldsmith, N. Limberopoulos, J. Derov
Ions of rare earth metals are widely known for their versatile ultraviolet, visible, near infrared and middle infrared fluorescence; they can be excited by wavelengths ranging from the ultraviolet to near infrared. The preparation and optimization of infrared fluorescent ceramics will be discussed, as well as their thin film incorporation into plasmonic systems for fluorescent imaging with enhanced efficiency.
{"title":"Surface plasmon enhanced rare earth fluorescence for increased imaging efficiency","authors":"J. Vella, V. Vasilyev, J. Goldsmith, N. Limberopoulos, J. Derov","doi":"10.1109/NAECON.2014.7045776","DOIUrl":"https://doi.org/10.1109/NAECON.2014.7045776","url":null,"abstract":"Ions of rare earth metals are widely known for their versatile ultraviolet, visible, near infrared and middle infrared fluorescence; they can be excited by wavelengths ranging from the ultraviolet to near infrared. The preparation and optimization of infrared fluorescent ceramics will be discussed, as well as their thin film incorporation into plasmonic systems for fluorescent imaging with enhanced efficiency.","PeriodicalId":318539,"journal":{"name":"NAECON 2014 - IEEE National Aerospace and Electronics Conference","volume":"44 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113994622","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 : 2014-06-24DOI: 10.1109/NAECON.2014.7045834
N. Boppana, S. Ren, Henry Chen
High speed, low power, area efficient adders continue to play a key role in hardware implementations of digital signal processing applications. Adders based on Complimentary Pass Transistor Logic (CPL) are power and area efficient, but are slower compared to Square Root Carry Select (SQRT-CS) based adders. This paper proposes a unique custom adder design in 250-nm CMOS technology, which is based on a combination of CPL and CS logic to obtain a fast and power/area efficient adder design. A 16 bit CPL/CS adder is presented which is faster compared to the standard SQRT-CS adder while significantly reducing the power and area.
{"title":"Low-power and high speed CPL-CSA adder","authors":"N. Boppana, S. Ren, Henry Chen","doi":"10.1109/NAECON.2014.7045834","DOIUrl":"https://doi.org/10.1109/NAECON.2014.7045834","url":null,"abstract":"High speed, low power, area efficient adders continue to play a key role in hardware implementations of digital signal processing applications. Adders based on Complimentary Pass Transistor Logic (CPL) are power and area efficient, but are slower compared to Square Root Carry Select (SQRT-CS) based adders. This paper proposes a unique custom adder design in 250-nm CMOS technology, which is based on a combination of CPL and CS logic to obtain a fast and power/area efficient adder design. A 16 bit CPL/CS adder is presented which is faster compared to the standard SQRT-CS adder while significantly reducing the power and area.","PeriodicalId":318539,"journal":{"name":"NAECON 2014 - IEEE National Aerospace and Electronics Conference","volume":"15 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124230188","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 : 2014-06-24DOI: 10.1109/NAECON.2014.7045773
Ahmed Al-Muraeb, H. Abdel-Aty-Zohdy
Photonic Crystal Fibers (PCF) have interesting features such as high non-linearity, four-wave mixing, and polarization-maintaining. These features offer new improvements and solutions for optoelectronic elements such as multi-channel filters, PCF lasers, PCF amplifiers, and tunable (multi-wavelength) fiber lasers. This work presents study and simulation using MATLAB® for a microstructured optical fiber based on defected square Photonic Crystal Lattice (PCL) with fixed value of longitudinal component of propagation constant, deploying Plane Wave Expansion (PWE) method. The PCL parameters considered are: structure period a = 1 μm; element radius = 0.2 μm; background material relative permittivity = 2.1316; element relative permittivity = 1; number of plane waves = 3; number of mesh nodes per unit cell = 30 (in each x & y directions); unit cell size of strictly periodic (defectless) structure = 30 × 30 nodes; unit cell size of the defected structure = 5 × unit cell size of strictly periodic structure; defect location is at center. The paper results include modes field distribution, and effects of: permittivity difference change, number of plane waves, and propagation constant. The results and the associated effects are highlighted and discussed.
{"title":"Study and simulation of microstructured photonic crystal optical fiber","authors":"Ahmed Al-Muraeb, H. Abdel-Aty-Zohdy","doi":"10.1109/NAECON.2014.7045773","DOIUrl":"https://doi.org/10.1109/NAECON.2014.7045773","url":null,"abstract":"Photonic Crystal Fibers (PCF) have interesting features such as high non-linearity, four-wave mixing, and polarization-maintaining. These features offer new improvements and solutions for optoelectronic elements such as multi-channel filters, PCF lasers, PCF amplifiers, and tunable (multi-wavelength) fiber lasers. This work presents study and simulation using MATLAB® for a microstructured optical fiber based on defected square Photonic Crystal Lattice (PCL) with fixed value of longitudinal component of propagation constant, deploying Plane Wave Expansion (PWE) method. The PCL parameters considered are: structure period a = 1 μm; element radius = 0.2 μm; background material relative permittivity = 2.1316; element relative permittivity = 1; number of plane waves = 3; number of mesh nodes per unit cell = 30 (in each x & y directions); unit cell size of strictly periodic (defectless) structure = 30 × 30 nodes; unit cell size of the defected structure = 5 × unit cell size of strictly periodic structure; defect location is at center. The paper results include modes field distribution, and effects of: permittivity difference change, number of plane waves, and propagation constant. The results and the associated effects are highlighted and discussed.","PeriodicalId":318539,"journal":{"name":"NAECON 2014 - IEEE National Aerospace and Electronics Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131125834","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 : 2014-06-24DOI: 10.1109/NAECON.2014.7045795
Zishuo Ding, Shuo Qian, Yulin Li, Zhaohui Li
Multimedia information processing is a new technology developing rapidly recent years, among which the Image Matching Technology has wide range of applications in various fields, such as face recognition and building recognition, image database retrieval, etc. This paper focus on the accuracy of image matching using SIFT (Scale Invariant Feature Transform) algorithm to extract feature points from images. And then the feature points are used to find out the matching points between two images by calculating the correlation degree based on the Analysis of Grey Correlation Degree. Compared with the original algorithm, in the case that the matching time is almost the same, the algorithm in this paper has higher matching accuracy and robustness, proved by experiments, can adapt to the requirements of image recognition in various conditions and can eliminate the influence of stretching, rotation and illumination change.
{"title":"An image matching method based on the analysis of grey correlation degree and feature points","authors":"Zishuo Ding, Shuo Qian, Yulin Li, Zhaohui Li","doi":"10.1109/NAECON.2014.7045795","DOIUrl":"https://doi.org/10.1109/NAECON.2014.7045795","url":null,"abstract":"Multimedia information processing is a new technology developing rapidly recent years, among which the Image Matching Technology has wide range of applications in various fields, such as face recognition and building recognition, image database retrieval, etc. This paper focus on the accuracy of image matching using SIFT (Scale Invariant Feature Transform) algorithm to extract feature points from images. And then the feature points are used to find out the matching points between two images by calculating the correlation degree based on the Analysis of Grey Correlation Degree. Compared with the original algorithm, in the case that the matching time is almost the same, the algorithm in this paper has higher matching accuracy and robustness, proved by experiments, can adapt to the requirements of image recognition in various conditions and can eliminate the influence of stretching, rotation and illumination change.","PeriodicalId":318539,"journal":{"name":"NAECON 2014 - IEEE National Aerospace and Electronics Conference","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130638214","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 : 2014-06-24DOI: 10.1109/NAECON.2014.7045808
Amin Jarrah, M. Jamali, Seyyed Soheil Sadat Hosseini
Particle filter has been proven to be a very effective method for identifying targets in non-linear and non-Gaussian environment. However, particle filter is computationally intensive. So, particle filter has been implemented on FPGA by exploiting parallel and pipelining approaches to reduce the computational burden. Our optimized FPGA implementation improves up to twelve times speed up. Also more speed ups are achieved with increasing number of particles.
{"title":"Optimized FPGA based implementation of particle filter for tracking applications","authors":"Amin Jarrah, M. Jamali, Seyyed Soheil Sadat Hosseini","doi":"10.1109/NAECON.2014.7045808","DOIUrl":"https://doi.org/10.1109/NAECON.2014.7045808","url":null,"abstract":"Particle filter has been proven to be a very effective method for identifying targets in non-linear and non-Gaussian environment. However, particle filter is computationally intensive. So, particle filter has been implemented on FPGA by exploiting parallel and pipelining approaches to reduce the computational burden. Our optimized FPGA implementation improves up to twelve times speed up. Also more speed ups are achieved with increasing number of particles.","PeriodicalId":318539,"journal":{"name":"NAECON 2014 - IEEE National Aerospace and Electronics Conference","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114747971","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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