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Proceedings of the Seventeenth National Radio Science Conference. 17th NRSC'2000 (IEEE Cat. No.00EX396)最新文献

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Reference-free adaptive interference cancellation using cross-coupled scheme 采用交叉耦合方案的无参考自适应干扰抵消
Proceedings of the Seventeenth National Radio Science Conference. 17th NRSC'2000 (IEEE Cat. No.00EX396) Pub Date : 2000-02-22 DOI: 10.1109/NRSC.2000.838921
A. Ammar, Elsayed M. Saad, Y. A. Mahgoub
{"title":"Reference-free adaptive interference cancellation using cross-coupled scheme","authors":"A. Ammar, Elsayed M. Saad, Y. A. Mahgoub","doi":"10.1109/NRSC.2000.838921","DOIUrl":"https://doi.org/10.1109/NRSC.2000.838921","url":null,"abstract":"This paper deals with the reference-free adaptive interference cancelling techniques. A new cross-coupled adaptive interference canceller (CC-AIC), with only a single input is introduced. This scheme is capable for cancelling narrow-band interference (NBI) from a broadband signal or wideband noise from a narrow-band signal with a significantly better cancellation performance than the conventional techniques. Cancellation was obtained even when the interference has a small power spectral density with respect to the desired signal and vice versa. Furthermore, this scheme can also be used efficiently as a speech enhancer.","PeriodicalId":211510,"journal":{"name":"Proceedings of the Seventeenth National Radio Science Conference. 17th NRSC'2000 (IEEE Cat. No.00EX396)","volume":"21 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120910124","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
Design of a fuzzy logic programmable membership function circuit 模糊逻辑可编程隶属函数电路的设计
Proceedings of the Seventeenth National Radio Science Conference. 17th NRSC'2000 (IEEE Cat. No.00EX396) Pub Date : 2000-02-22 DOI: 10.1109/NRSC.2000.838949
A. Taha, M. El-Khatib, A. Badawi
{"title":"Design of a fuzzy logic programmable membership function circuit","authors":"A. Taha, M. El-Khatib, A. Badawi","doi":"10.1109/NRSC.2000.838949","DOIUrl":"https://doi.org/10.1109/NRSC.2000.838949","url":null,"abstract":"The design of an analog programmable membership function circuit for fuzzy logic controllers implementation is introduced. The presented circuit has been simulated on PSpice. A VLSI implementation of the circuit has also been performed using the L-EDIT/sup TM/ program.","PeriodicalId":211510,"journal":{"name":"Proceedings of the Seventeenth National Radio Science Conference. 17th NRSC'2000 (IEEE Cat. No.00EX396)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115988083","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
A new low bit rate low delay algebraic CELP (ACELP) coder 一种新的低比特率低延迟代数CELP编码器
Proceedings of the Seventeenth National Radio Science Conference. 17th NRSC'2000 (IEEE Cat. No.00EX396) Pub Date : 2000-02-22 DOI: 10.1109/NRSC.2000.838933
R. El-Kouatly, S.H. El-Ramiy
{"title":"A new low bit rate low delay algebraic CELP (ACELP) coder","authors":"R. El-Kouatly, S.H. El-Ramiy","doi":"10.1109/NRSC.2000.838933","DOIUrl":"https://doi.org/10.1109/NRSC.2000.838933","url":null,"abstract":"The coders based upon ITU-T G.729 standard and its new version G.729A provide toll-quality speech for most operating conditions, and these coders are the prime candidates for the next generation of cellular systems. This paper presents new techniques for reducing the bit rate of these coders from 8 kbits/s to 7 kbits/s without introducing any bad effects into the coders' performance in clean or noisy environments, and without increasing the codec delay. The new coder is called algebraic CELP (ACELP) and has 7 kbits/s with 15 ms algorithmic delay.","PeriodicalId":211510,"journal":{"name":"Proceedings of the Seventeenth National Radio Science Conference. 17th NRSC'2000 (IEEE Cat. No.00EX396)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120963909","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
Advanced system for automating eddy-current nondestructive evaluation 先进的涡流无损检测自动化系统
Proceedings of the Seventeenth National Radio Science Conference. 17th NRSC'2000 (IEEE Cat. No.00EX396) Pub Date : 2000-02-22 DOI: 10.1109/NRSC.2000.838977
M. Fahmy, E. Hashish, I. Elshafiey, I. Jannound
{"title":"Advanced system for automating eddy-current nondestructive evaluation","authors":"M. Fahmy, E. Hashish, I. Elshafiey, I. Jannound","doi":"10.1109/NRSC.2000.838977","DOIUrl":"https://doi.org/10.1109/NRSC.2000.838977","url":null,"abstract":"Various nondestructive evaluation (NDE) techniques are widely used in the inspection of sub-surface flaws. This paper introduces the results of a research conducted to enhance the performance of eddy-current nondestructive evaluation (ECNDE) by developing an integrated computer based system. Advantages of this system include increasing test speed, while avoiding errors due to human factors. The system can be used to optimize various parameters affecting the performance of inspecting sub-surface cracks including probe configuration and operating frequency range. Inspectability is enhanced by advanced processing of raw eddy current signal. The two-dimensional wavelet transform is applied to eddy current c-scan images to extract feature vectors representing the material flaws. Artificial neural network techniques are then invoked to automate the detection and classification of sub-surface flaws.","PeriodicalId":211510,"journal":{"name":"Proceedings of the Seventeenth National Radio Science Conference. 17th NRSC'2000 (IEEE Cat. No.00EX396)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122649480","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: 9
A robot nuclear application 机器人核应用
Proceedings of the Seventeenth National Radio Science Conference. 17th NRSC'2000 (IEEE Cat. No.00EX396) Pub Date : 2000-02-22 DOI: 10.1109/NRSC.2000.838976
S. Morsy, F. Mohamed, M. Ghonaimy, A. A. Omar, M. W. Morsy
{"title":"A robot nuclear application","authors":"S. Morsy, F. Mohamed, M. Ghonaimy, A. A. Omar, M. W. Morsy","doi":"10.1109/NRSC.2000.838976","DOIUrl":"https://doi.org/10.1109/NRSC.2000.838976","url":null,"abstract":"This paper presents the replacement of the conventional manipulators in the hot cells of the ET-RR-1 nuclear research reactor by a robot, to prevent involved personnel from being exposed to nuclear radiation hazards. In this respect, the educational robot HERO 2000, after being coupled to a PC, and provided with a sensing mat which is known as the force sensing array (FSA), is programmed to be able to identify the position and orientation of an irradiation can that is falling on the ground of a hot cell, and consequently to be able to pick up and transport this can to a lathe for cutting. A computer program, translates the positions and orientations of the irradiation cans, on the basis of some proposed processing criteria, to the robot HERO 2000 joint angles by virtue of employing inverse kinematics. Experimental measurement reveals that the output data of the sensing mat, are associated with statistical uncertainties. Linear representation of the associated statistical uncertainties together with inverse kinematics differentials, permits prediction of the corresponding corrections for joint angles that are required to ensure successful picking up of irradiation cans.","PeriodicalId":211510,"journal":{"name":"Proceedings of the Seventeenth National Radio Science Conference. 17th NRSC'2000 (IEEE Cat. No.00EX396)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126071785","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 proposed graded band gap channel (GBGC) MOSFET 提出了一种梯度带隙通道(GBGC) MOSFET
Proceedings of the Seventeenth National Radio Science Conference. 17th NRSC'2000 (IEEE Cat. No.00EX396) Pub Date : 2000-02-22 DOI: 10.1109/NRSC.2000.838965
H.A. El Hameed, A. El Hennawy, M. El Said, H. El Metaafy, A. Nour
{"title":"A proposed graded band gap channel (GBGC) MOSFET","authors":"H.A. El Hameed, A. El Hennawy, M. El Said, H. El Metaafy, A. Nour","doi":"10.1109/NRSC.2000.838965","DOIUrl":"https://doi.org/10.1109/NRSC.2000.838965","url":null,"abstract":"In this paper we propose a MOSFET structure which limits the drawbacks of the traditional MOSFET. Moreover it is super-fast and can be operated in the GHz range. The suggested MOSFET is analyzed to prove its superior noise and high speed performance that makes it suitable to be used in GHz applications. The proposed MOSFET is realized by using the known MOSFET technology with a graded band gap channel (GBGC) in the longitudinal direction from the source to the drain with the greater band gap at the source side and the smaller one at the drain side. This graded band gap can be achieved by implanting atoms of a material which has a smaller band gap energy than silicon. The fractional ratio (/spl delta/) of the implanted atoms increases with the position x towards the drain.","PeriodicalId":211510,"journal":{"name":"Proceedings of the Seventeenth National Radio Science Conference. 17th NRSC'2000 (IEEE Cat. No.00EX396)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126113408","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
Application of FDTD method for kidney microwave hyperthermia using annular phased array 环形相控阵时域有限差分法在肾脏微波热疗中的应用
Proceedings of the Seventeenth National Radio Science Conference. 17th NRSC'2000 (IEEE Cat. No.00EX396) Pub Date : 2000-02-22 DOI: 10.1109/NRSC.2000.838980
N. Ismail, A. El-Nagar
{"title":"Application of FDTD method for kidney microwave hyperthermia using annular phased array","authors":"N. Ismail, A. El-Nagar","doi":"10.1109/NRSC.2000.838980","DOIUrl":"https://doi.org/10.1109/NRSC.2000.838980","url":null,"abstract":"The finite difference time domain (FDTD) method is used to determine the electromagnetic power distribution and calculate the specific absorption rates (SARs) inside human body. In this paper, this method is applied to evaluate SAR in an inhomogeneous tissue which has a cylindrical shape. An annular phased array (APA) consisting of eight dipoles is used to focus the SARs inside the model. A deionized water bolus is placed between the model and the radiating dipoles to improve field matching as well as to obtain superficial cooling. For this mode, focusing SAR by APA at one or both kidneys is investigated.","PeriodicalId":211510,"journal":{"name":"Proceedings of the Seventeenth National Radio Science Conference. 17th NRSC'2000 (IEEE Cat. No.00EX396)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132968763","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
Integrated antennas for wireless applications 无线应用的集成天线
Proceedings of the Seventeenth National Radio Science Conference. 17th NRSC'2000 (IEEE Cat. No.00EX396) Pub Date : 2000-02-22 DOI: 10.1109/NRSC.2000.838837
Y. Antar
{"title":"Integrated antennas for wireless applications","authors":"Y. Antar","doi":"10.1109/NRSC.2000.838837","DOIUrl":"https://doi.org/10.1109/NRSC.2000.838837","url":null,"abstract":"Over the last two decades, the development of new printed and other planar antenna technology has fundamentally changed microwave engineering and microwave and millimeter wave communications. New planar antennas can be printed on substrates with minimal cost and processing. Low profile, highly efficient dielectric resonator antennas (DRA) have shown great potential with large bandwidth capabilities, low loss and flexibility over a large frequency range. In many new applications, these compact and low profile antennas, which can also be integrated with active devices, offer a practical and inexpensive solution to previously used configurations of waveguide or reflector-based antenna systems. Increased present and future demands by commercial wireless applications at microwave and millimeter-wave frequencies require new innovations to exploit all the potential and flexibility that these classes of antennas could offer. This paper discusses these related issues by presenting several examples of some of the innovations in integrated planar active and passive antennas, and their related design and operations issues.","PeriodicalId":211510,"journal":{"name":"Proceedings of the Seventeenth National Radio Science Conference. 17th NRSC'2000 (IEEE Cat. No.00EX396)","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133147711","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
A genetic algorithm for joint optimization of capacity and flow assignment in packet switched networks 分组交换网络中容量和流量分配联合优化的遗传算法
Proceedings of the Seventeenth National Radio Science Conference. 17th NRSC'2000 (IEEE Cat. No.00EX396) Pub Date : 2000-02-22 DOI: 10.1109/NRSC.2000.838928
M.E. Mostafa, S. Eid
{"title":"A genetic algorithm for joint optimization of capacity and flow assignment in packet switched networks","authors":"M.E. Mostafa, S. Eid","doi":"10.1109/NRSC.2000.838928","DOIUrl":"https://doi.org/10.1109/NRSC.2000.838928","url":null,"abstract":"One of the design problems concerning packet switched computer communication networks is the joint optimization of capacity and flow assignment (CFA). In this problem the topology of the network and the traffic requirements between node pairs are given, and the objective is to find the flows on the different links and their capacities that minimize the total network cost and keep its average delay below a certain upper limit. This paper proposes an algorithm based on hybridization of genetic algorithms (GA) and the shortest path routing. The proposed algorithm has shown simplification in implementation and improvement in performance. Computational results indicated a 3.17% reduction in network cost when compared with a previous method.","PeriodicalId":211510,"journal":{"name":"Proceedings of the Seventeenth National Radio Science Conference. 17th NRSC'2000 (IEEE Cat. No.00EX396)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114147761","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
Mobility detection and tracking of surface emitters at a tactically acceptable airborne ESM altitudes 在战术上可接受的机载ESM高度对地面辐射源进行机动探测和跟踪
Proceedings of the Seventeenth National Radio Science Conference. 17th NRSC'2000 (IEEE Cat. No.00EX396) Pub Date : 2000-02-22 DOI: 10.1109/NRSC.2000.838957
M. El-Mahy
{"title":"Mobility detection and tracking of surface emitters at a tactically acceptable airborne ESM altitudes","authors":"M. El-Mahy","doi":"10.1109/NRSC.2000.838957","DOIUrl":"https://doi.org/10.1109/NRSC.2000.838957","url":null,"abstract":"The use of airborne electronic support measures (ESM) system to detect and track mobile emitters is vital in military operations because of its importance in emitter identification and threat evaluation in a highly dense electromagnetic environment. The aim of this paper is to study whether the three dimensional inputs of azimuth, elevation, and height to an ESM system can detect and track surface mobile emitters at tactically acceptable airborne ESM altitudes. The paper establishes an algorithm that is: (a) non-computationally extensive, (b) can give decision criteria on the transition state of targets from stationary to mobile, and (c) is tactically and operationally acceptable.","PeriodicalId":211510,"journal":{"name":"Proceedings of the Seventeenth National Radio Science Conference. 17th NRSC'2000 (IEEE Cat. No.00EX396)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127096453","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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