2018 35th National Radio Science Conference (NRSC)最新文献

A 2D multilateration algorithm used for air traffic localization and tracking 一种用于空中交通定位和跟踪的二维乘法算法

2018 35th National Radio Science Conference (NRSC) Pub Date : 2018-03-20 DOI: 10.1109/NRSC.2018.8354364

Mohamed El-Ghoboushi, A. Ghuniem, A. Gaafar, H. Abou-Bakr

{"title":"A 2D multilateration algorithm used for air traffic localization and tracking","authors":"Mohamed El-Ghoboushi, A. Ghuniem, A. Gaafar, H. Abou-Bakr","doi":"10.1109/NRSC.2018.8354364","DOIUrl":"https://doi.org/10.1109/NRSC.2018.8354364","url":null,"abstract":"Space capacity and safety of Airspace Surveillance Systems are regularly increasing to meet the demands of air traffic control. Researchers are interested in many directions like optimal sensors deployment, localization and tracking algorithms. Thus, a 2-D Multilateration algorithm is proposed to accurately identify the aircraft position. It is based on the classical Two Ray propagation model. Important parameters that affect the final aircraft estimation position are presented like the path gain factor (interference factor) which is a function of the divergence factor, reflection coefficient and the path difference between the direct and ground reflected rays. The proposed algorithm uses the geographic coordinates (Latitude and Longitude) which are considered more practically used in navigation than Cartesian coordinates that are used in previous algorithms in literature. Hence, General expressions for both the latitude and longitude will be deduced. In order to simulate the algorithm, the Multilateration network at Cairo International Airport is considered to be a pilot area and the results are presented. The results of the proposed algorithm are applied to Kalman filter to achieve aircraft continuous tracking. Finally, the path gain factor effect on tracking capability is discussed.","PeriodicalId":202771,"journal":{"name":"2018 35th National Radio Science Conference (NRSC)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122076845","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

Quad spiral microstrip resonator with high quality factor 高品质因数四螺旋微带谐振器

2018 35th National Radio Science Conference (NRSC) Pub Date : 2018-03-20 DOI: 10.1109/NRSC.2018.8354348

Mahmoud S. Abouyoussef, A. El-Tager, H. El-Ghitani

引用次数: 4

TECEAP: Two-tier era-based clustering energy-efficient adaptive and proactive routing protocol for wireless sensor networks TECEAP:基于两层时代的无线传感器网络聚类、节能自适应和主动路由协议

2018 35th National Radio Science Conference (NRSC) Pub Date : 2018-03-20 DOI: 10.1109/NRSC.2018.8354363

Reem E. Mohamed, Walid R. Ghanem, M. A. Mohamed

{"title":"TECEAP: Two-tier era-based clustering energy-efficient adaptive and proactive routing protocol for wireless sensor networks","authors":"Reem E. Mohamed, Walid R. Ghanem, M. A. Mohamed","doi":"10.1109/NRSC.2018.8354363","DOIUrl":"https://doi.org/10.1109/NRSC.2018.8354363","url":null,"abstract":"The role of relay nodes in Wireless Sensor Network in proactive periodic monitoring applications is to route data from all the sensors in the Region of Interest (ROI) to the Base Station (BS). Accordingly, random relay nodes selection is used in energy-efficient routing protocols to avoid the energy-hole problem; however, cluster-based routing protocols usually depend on periodic topology formation, which adds significant energy overhead. The proposed cluster-based routing protocol has a two-tier structure that combines the benefit of cluster-head distribution and chain-based routing to minimize cluster-head (CH) loss due to data aggregation and ROI to BS data transmission. Additionally, it uses an adaptive length of time for network reconstruction to maintain network adaptability with minimal network overhead through network awareness approach to maintain network connectivity. The results of our work have been compared to competing for energy efficient routing protocols that have probabilistic nature like LEACH and NEECP and routing protocols that tackle the same problem of relay nodes loss in far ROI to BS transmission. These results proved the advancement of TECEAP by showing about 100% increase in network stability period, and the extremely low rate of network energy and node losses. The results also proved that in TECEAP, the ROI coverage is sufficiently preserved through the network lifetime.","PeriodicalId":202771,"journal":{"name":"2018 35th National Radio Science Conference (NRSC)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117313727","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 study of using graphene coated microstrip lines for crosstalk reduction at radio frequency 使用石墨烯涂层微带线在射频下减少串扰的研究

2018 35th National Radio Science Conference (NRSC) Pub Date : 2018-03-20 DOI: 10.1109/NRSC.2018.8354350

Mahmoud I. Refaie, W. El-Deeb, M. Abdalla

引用次数: 8

Reconfigurable plasma circularly polarized magneto-electric dipole antenna 可重构等离子体圆极化磁电偶极天线

2018 35th National Radio Science Conference (NRSC) Pub Date : 2018-03-20 DOI: 10.1109/NRSC.2018.8354354

H. Malhat, S. Zainud-Deen

{"title":"Reconfigurable plasma circularly polarized magneto-electric dipole antenna","authors":"H. Malhat, S. Zainud-Deen","doi":"10.1109/NRSC.2018.8354354","DOIUrl":"https://doi.org/10.1109/NRSC.2018.8354354","url":null,"abstract":"This paper proposes a plasma based circularly polarized (CP) magneto-electric (ME) dipole antenna with reconfigurable radiation characteristic. The antenna consists of two horizontal trapezoidal plasma patches, two vertical plasma patches, and shaped metallic cavity. The antenna is fed using Γ-shaped plasma dipole. The antenna introduces wide impedance matching bandwidth of 75 % (from 1.64 GHz to 3.7 GHz) and wide circular polarization bandwidth of 68% (from 1.9 GHz to 3.7 GHz). The operating frequency bandwidth of the ME-dipole is controlled by the plasma frequency according to its applications such as DCS/UMTS (1.71–2.18 GHz), 3G/LTE (1.84–2.69 GHz), and through-the-wall imaging radars (1.6–3.7 GHz). The radiation characteristics of the proposed ME-dipole antenna are investigated for different plasma frequencies. The antenna introduces a stable gain with peak value of 10.7 dB and high efficiency of 95%. A 2𢈗2 ME-dipole antenna array with sequential feed is employed to improve the antenna gain and circular polarized bandwidth of the plasma ME-dipole antenna. Two array arrangements have been investigated for high gain and wideband CP characteristics.","PeriodicalId":202771,"journal":{"name":"2018 35th National Radio Science Conference (NRSC)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129062961","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

Design of compact high efficient WPT system utilizing half ring resonators (HRRs) DGS for short range applications 利用半环谐振器(HRRs) DGS为短距离应用设计紧凑高效的WPT系统

2018 35th National Radio Science Conference (NRSC) Pub Date : 2018-03-20 DOI: 10.1109/NRSC.2018.8354360

H. Atallah

引用次数: 6

Textile antenna integrated with a cap for L1 GPS application 纺织天线集成了一个帽L1 GPS应用

2018 35th National Radio Science Conference (NRSC) Pub Date : 2018-03-20 DOI: 10.1109/NRSC.2018.8354357

W. Hassan, A. Attiya

引用次数: 7

A new image denoising technique using orthogonal complex wavelets 一种新的正交复小波图像去噪技术

2018 35th National Radio Science Conference (NRSC) Pub Date : 2018-03-20 DOI: 10.1109/NRSC.2018.8354367

M. Fahmy, O. Fahmy

{"title":"A new image denoising technique using orthogonal complex wavelets","authors":"M. Fahmy, O. Fahmy","doi":"10.1109/NRSC.2018.8354367","DOIUrl":"https://doi.org/10.1109/NRSC.2018.8354367","url":null,"abstract":"The complex wavelet Transforms CWTs are known for their excellent edge preserving together with nearly shift invariant features. They are implemented as two real DWTs connected in parallel. These two DWTs are designed such that their wavelet coefficients form a nearly Hilbert transform pairs at every decomposition level. This paper, presents a new orthogonal filter design for these CWT Hilbert transform pairs. The proposed design satisfies in a least squares sense, the Hilbert constraints over the filter's pass-band. In the meantime, the half band properties of the orthogonal filter, are guaranteed. Simulation results show that the designed filter is nearly shift invariant. Next, the designed filter was used in image de-noising. In this respect, the bivariate shrinkage algorithm is used to threshold the magnitudes of the CWT wavelet coefficients. Unlike earlier designs that suffer from excessive processing time, a simple model is proposed to model the dependence between the magnitudes of the wavelet coefficient and its parent at adjacent sub band. This allows the derivation of a closed form expression for the thresholded magnitudes. Subsequently, a fast estimation of the clean wavelet coefficient, at every pixel and every sub band is obtained. Several illustrative examples are given to verify the superior de-noising performance and their nearly shift invariance features.","PeriodicalId":202771,"journal":{"name":"2018 35th National Radio Science Conference (NRSC)","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126270027","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

Meshed conductor and meshed substrate GPS L1 band microstrip antenna for Cubesat applications 用于立方体卫星的网格导体和网格衬底GPS L1带微带天线

2018 35th National Radio Science Conference (NRSC) Pub Date : 2018-03-20 DOI: 10.1109/NRSC.2018.8354359

Mostafa Rabie, H. El-Henawy, Fatma El-Hefnawy, F. Ibrahim

引用次数: 6

Radar cross section reduction using perforated dielectric material and plasma AMC structure 利用多孔介质材料和等离子体AMC结构减小雷达横截面

2018 35th National Radio Science Conference (NRSC) Pub Date : 2018-03-20 DOI: 10.1109/NRSC.2018.8354358

N.A. Shabayk, H. Malhat, S. Zainud-Deen

引用次数: 6