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REBC2, Rotor Enhanced Block Cipher 2 REBC2，转子增强分组密码2
2007 National Radio Science Conference Pub Date : 2007-03-13 DOI: 10.1109/NRSC.2007.371401
H. Elkamchouchi, A. Elshafee
{"title":"REBC2, Rotor Enhanced Block Cipher 2","authors":"H. Elkamchouchi, A. Elshafee","doi":"10.1109/NRSC.2007.371401","DOIUrl":"https://doi.org/10.1109/NRSC.2007.371401","url":null,"abstract":"RCBC2 is a new cryptosystem, developed on the concept of rotor enhanced block cipher which was proposed before by the authors. The rotor enhanced block cipher concept was considered from a new point of view, which is to use rotors to achieve two basic cryptographic operations; permutation, and substitution. Round key is generated using rotor too. That generated key is used to achieve ciphertext key dependency. To enhance non-linearity and to resist linear cryptanalysis, REBC2 has a variable block, and key lengths. Each round has its own block length which depends on round the key and round key length. Dependency is based upon the pervious round generated key. Another feature of REBC2 is that the used rotors are not ordinary rotating arrays containing large amount of static data, but they are implemented using round key dependent mathematical linear expressions, which was firstly proposed by authors in KAMFEE. This achieved memory-less, normalized ciphertext statistics, and small processing speed trend.","PeriodicalId":177282,"journal":{"name":"2007 National Radio Science Conference","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126855162","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
Optimum Time Shift Autocorrelation for Time Hopping UWB System using PPM Technique 用PPM技术实现跳时UWB系统的最优时移自相关
2007 National Radio Science Conference Pub Date : 2007-03-13 DOI: 10.1109/NRSC.2007.371382
J. George, S. Shaaban, Kh. El Shennawy, Senior Member
{"title":"Optimum Time Shift Autocorrelation for Time Hopping UWB System using PPM Technique","authors":"J. George, S. Shaaban, Kh. El Shennawy, Senior Member","doi":"10.1109/NRSC.2007.371382","DOIUrl":"https://doi.org/10.1109/NRSC.2007.371382","url":null,"abstract":"This paper presents the optimum time shift of pulse position modulation (PPM) to achieve minimum autocorrelation and consequently minimum bit error rate, in time hopping UWB communication system. The minimum autocorrelation is calculated for the famous pulses used in UWB, the Gaussian pulses, from zero order to fifth order. The obtained result is achieved by MATLAB simulation for practical TH-UWB system.","PeriodicalId":177282,"journal":{"name":"2007 National Radio Science Conference","volume":" 24","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113951989","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 New Approach for Key Controlled Agreement 一种密钥控制协议的新方法
2007 National Radio Science Conference Pub Date : 2007-03-13 DOI: 10.1109/NRSC.2007.371362
H. Elkamchouchi, M. Eldefrawy
{"title":"A New Approach for Key Controlled Agreement","authors":"H. Elkamchouchi, M. Eldefrawy","doi":"10.1109/NRSC.2007.371362","DOIUrl":"https://doi.org/10.1109/NRSC.2007.371362","url":null,"abstract":"Diffie-Hellman key agreement protocol is the first and most famous protocol, but it has many flaws and drawbacks. Therefore, this paper proposes a new two-pass authenticated key agreement protocol (AK) provides assurance, randomization, and controlling of the key reception, this protocol is based on Dijfie-Hellman problem and also follows - up T. Matumoto, Y. Takashima and H. Imai two-pass Key Agreement Protocols.","PeriodicalId":177282,"journal":{"name":"2007 National Radio Science Conference","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114276434","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 Differential Clutter Map Processing in Modern Surveillance Radars 现代监视雷达中一种新的差分杂波图处理方法
2007 National Radio Science Conference Pub Date : 2007-03-13 DOI: 10.1109/NRSC.2007.371397
A. Hafez
{"title":"A New Differential Clutter Map Processing in Modern Surveillance Radars","authors":"A. Hafez","doi":"10.1109/NRSC.2007.371397","DOIUrl":"https://doi.org/10.1109/NRSC.2007.371397","url":null,"abstract":"In this paper we propose a new differential clutter map processing to reduce the false alarms from stationary ground clutter, sea clutter and improve the detection probability of the slow moving target with low Doppler frequency shift. The proposed clutter map is a scan to scan processing which receives the echo signal from Doppler filter bank tuned at lowest Doppler frequency, processes it and delivers the processed signal to the CFAR processing. The simulation results show that the false alarm rate is reduced by more than -30 db. The Clutter map also increased the probability of detection of low speed target, slower than 100 Km/hr.","PeriodicalId":177282,"journal":{"name":"2007 National Radio Science Conference","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133031272","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
On the Analysis of the Interaction between Surface Acoustic Wave (SAW) and Adjacent Media 表面声波(SAW)与邻近介质相互作用分析
2007 National Radio Science Conference Pub Date : 2007-03-13 DOI: 10.1109/NRSC.2007.371411
T. Tana, M.A.A. Ei-Dosoky, A.M. El-Saved
{"title":"On the Analysis of the Interaction between Surface Acoustic Wave (SAW) and Adjacent Media","authors":"T. Tana, M.A.A. Ei-Dosoky, A.M. El-Saved","doi":"10.1109/NRSC.2007.371411","DOIUrl":"https://doi.org/10.1109/NRSC.2007.371411","url":null,"abstract":"In this paper, an analysis for a separated-medium SAW device model is presented. A computer programs is built (according to perturbation theory) to determine the changes in the relative velocity and the attenuation of the SAW for different media and substrates. The effect of applying a DC voltage to the adjacent medium on SAW is investigated. The usage of this model is presented. Medium characteristics such as the mobility carriers and the concentration carriers are determined. The simulation results obtained from this model are discussed.","PeriodicalId":177282,"journal":{"name":"2007 National Radio Science Conference","volume":"6 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132433751","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: 8
Microstrip Antenna with Shorting Pins As A sensor for Landmines Detection 带短针微带天线的地雷探测传感器
2007 National Radio Science Conference Pub Date : 2007-03-13 DOI: 10.1109/NRSC.2007.371358
S. Zainud-Deen, M. E. Badr, K. Awadalla, H. Sharshar
{"title":"Microstrip Antenna with Shorting Pins As A sensor for Landmines Detection","authors":"S. Zainud-Deen, M. E. Badr, K. Awadalla, H. Sharshar","doi":"10.1109/NRSC.2007.371358","DOIUrl":"https://doi.org/10.1109/NRSC.2007.371358","url":null,"abstract":"A proposed sensor for landmines detection consists of two parallel microstrip antennas placed on same ground plane with shorting pins between the patch and the ground plane has been investigated. The microstrip patch array with shorting pins has the advantage of a low coupling and size reduction compared with classic arrays. The finite-difference time-domain (FDTD) is used to simulate the senor for landmines detection.","PeriodicalId":177282,"journal":{"name":"2007 National Radio Science Conference","volume":"69 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123157182","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
Compact broadband microstrip patch antennas 小型宽带微带贴片天线
2007 National Radio Science Conference Pub Date : 2007-03-13 DOI: 10.1109/NRSC.2007.371339
S. Mahmoud
{"title":"Compact broadband microstrip patch antennas","authors":"S. Mahmoud","doi":"10.1109/NRSC.2007.371339","DOIUrl":"https://doi.org/10.1109/NRSC.2007.371339","url":null,"abstract":"We introduce microstrip patch antennas of simple shapes which can exhibit broadband operation and still enjoy relatively compact size. The circular and rectangular patches are considered when shorted to the ground plane via one or two shorting pins. The antenna is analyzed by finding the cavity modes of the structure in terms of their resonant frequencies and field distributions. Depending on the modes excited by the feeder, the patch antenna can operate as a compact antenna, as a broadband or multiband antenna. It is indicated that the suggested patch configuration can also operate as electronically tunable antenna. The theory presented here leads to universal curves for the resonant frequencies of the dominant cavity modes. The theory is supported by simulation results as well as experimental work.","PeriodicalId":177282,"journal":{"name":"2007 National Radio Science Conference","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115357478","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
Empirical Formulation and Design of a Broadband Enhanced E-Patch Antenna 宽带增强型e -贴片天线的经验公式与设计
2007 National Radio Science Conference Pub Date : 2007-03-13 DOI: 10.1109/NRSC.2007.371359
A. Bzeih, S. A. Chahine, K. Kabalan, A. El-Hajj, A. Chehab
{"title":"Empirical Formulation and Design of a Broadband Enhanced E-Patch Antenna","authors":"A. Bzeih, S. A. Chahine, K. Kabalan, A. El-Hajj, A. Chehab","doi":"10.1109/NRSC.2007.371359","DOIUrl":"https://doi.org/10.1109/NRSC.2007.371359","url":null,"abstract":"A broadband probe-fed microstrip antenna with E-shaped patch on a single-layer air substrate is investigated. Bandwidth enhancement of the antenna is achieved by inserting two parallel slots into its radiating patch. The effects of the following design parameters: the slot length (Ls), width (Ws, position (Ps), the substrate height (h), and the position of excitation point (Xf, Yf) are analyzed, followed by an optimization procedure to select the optimum values for broad-band operation. The design parameters are empirically formulated as a function of the center frequency. Empirical equations are validated by simulation. Finally, a 41% Enhanced E-shaped patch antenna for modern wireless communications (PCS, DCS, UMTS, WLAN 802.11 b/g. and Bluetooth) is designed, simulated, fabricated, and measured. A comparison between simulated and measured results is also presented.","PeriodicalId":177282,"journal":{"name":"2007 National Radio Science Conference","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115527681","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 Hybrid Finite Difference Frequency Domain and Particle Swarm Optimization Techniques for Forward and Inverse Electromagnetic Scattering Problems 电磁正、逆散射问题的有限差分频域和粒子群混合优化技术
2007 National Radio Science Conference Pub Date : 2007-03-13 DOI: 10.1109/NRSC.2007.371350
S. Zainud-Deen, M. Ibrahim, E. El-Deen
{"title":"A Hybrid Finite Difference Frequency Domain and Particle Swarm Optimization Techniques for Forward and Inverse Electromagnetic Scattering Problems","authors":"S. Zainud-Deen, M. Ibrahim, E. El-Deen","doi":"10.1109/NRSC.2007.371350","DOIUrl":"https://doi.org/10.1109/NRSC.2007.371350","url":null,"abstract":"Finite-difference frequency domain (FDFD) is formulated to calculate the scattered field from superquadric dielectric cylinder. A hybrid technique from FDFD and particle swarm optimization technique (PSO) is used to reconstruct both the shape and the relative permittivity of a homogenous dielectric cylinder. The dielectric constants of materials in the solid, liquid, or in the paste forms are considered.","PeriodicalId":177282,"journal":{"name":"2007 National Radio Science Conference","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114245495","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
Continuous-wave Ultrasonic Tomography In the Presence of Relative Motion of Some Particles within the Rotating Body 旋转物体中某些粒子存在相对运动时的连续波超声层析成像
2007 National Radio Science Conference Pub Date : 2007-03-13 DOI: 10.1109/NRSC.2007.371412
S. El-sherbiny, M. Eldosoky
{"title":"Continuous-wave Ultrasonic Tomography In the Presence of Relative Motion of Some Particles within the Rotating Body","authors":"S. El-sherbiny, M. Eldosoky","doi":"10.1109/NRSC.2007.371412","DOIUrl":"https://doi.org/10.1109/NRSC.2007.371412","url":null,"abstract":"Continuous-wave ultrasonic tomography is an imaging technique used to obtain information about the structure of deep-lying layers of a certain rotating body. In recent research, the analysis of this tomographic technique is introduced. In this paper, it was assumed that the rotating object is a rigid body, i.e. all particles of this object have the same amount of angular motion and accordingly, all these particles deliver Doppler signals whose frequency depend only on their distance from the axis of rotation. However, If the rotating body includes particles that can move relative to the rest of the body, then the net Doppler frequency shift resulting from the rotation of such particles will not be imaged in their true position, i.e. they will be either too far or too near to the axis of rotation. This effect can be considered as an error in the imaging process. In this paper, this problem will be discussed and suggestions will be introduced in order to avoid this error.","PeriodicalId":177282,"journal":{"name":"2007 National Radio Science Conference","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117167779","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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