Proceedings of the Eighteenth National Radio Science Conference. NRSC'2001 (IEEE Cat. No.01EX462)最新文献

Reduction of radar cross section from vee wire scatterer carrying traveling wave current 载行波电流的v形线散射体减小雷达横截面

Proceedings of the Eighteenth National Radio Science Conference. NRSC'2001 (IEEE Cat. No.01EX462) Pub Date : 2001-03-27 DOI: 10.1109/NRSC.2001.929202

A. Shaalan, A. I. Bahnacy

引用次数: 1

Radiation of electromagnetic waves by a circular phased aperture antenna for neck hyperthermia 环形相位孔径天线的电磁波辐射用于颈部热疗

Proceedings of the Eighteenth National Radio Science Conference. NRSC'2001 (IEEE Cat. No.01EX462) Pub Date : 2001-03-27 DOI: 10.1109/NRSC.2001.929424

N. Ismail, H.D. Ramadan

引用次数: 1

Performance analysis of GMSK with CSDD and CSDDD scheme in land mobile to mobile channel with random frequency shifts and CCI 基于CSDD和CSDDD方案的GMSK在随机频移和CCI的陆地移动到移动信道中的性能分析

Proceedings of the Eighteenth National Radio Science Conference. NRSC'2001 (IEEE Cat. No.01EX462) Pub Date : 2001-03-27 DOI: 10.1109/NRSC.2001.929239

E. Hagras, K.A.M. Soliman, F. Abou-Chadi

{"title":"Performance analysis of GMSK with CSDD and CSDDD scheme in land mobile to mobile channel with random frequency shifts and CCI","authors":"E. Hagras, K.A.M. Soliman, F. Abou-Chadi","doi":"10.1109/NRSC.2001.929239","DOIUrl":"https://doi.org/10.1109/NRSC.2001.929239","url":null,"abstract":"In land mobile to mobile (LMM) channel, random frequency shifts (RFSs) may be introduced into the carrier frequency as a result of the Doppler effect due to the motion of transmitter (Tx) and receiver (Rx). Hagras et al. (2000) showed that the performance of center sampling differential detection (CSDD) in an LMM channel yields poor performance in the presence of RFSs. The main object of this paper is to study the performance of center sampling double differential detection (CSDDD) scheme introduced in Abdelkader and Fred (1986) in an LMM channel and compare its performance with the CSDD scheme. The performance of the CSDD and CSDDD schemes are analyzed in a two path Rayleigh fading channel taking into account frequency selective fading (FSF), RFS, intersymbol interference (ISI), Doppler frequency shift, cochannel interference (CCI), and additive white Gaussian noise (AWGN). It is shown that the CSDDD scheme in the LMM channel has the potential to compact the effect of RFS and its performance is better than the CSDD scheme when RFSs are introduced into the carrier.","PeriodicalId":123517,"journal":{"name":"Proceedings of the Eighteenth National Radio Science Conference. NRSC'2001 (IEEE Cat. No.01EX462)","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129142656","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

CMOS circuit realization of a truncated Viterbi decoder using pipeline technique 利用流水线技术实现截断式维特比解码器的CMOS电路

Proceedings of the Eighteenth National Radio Science Conference. NRSC'2001 (IEEE Cat. No.01EX462) Pub Date : 2001-03-27 DOI: 10.1109/NRSC.2001.929412

H. H. Ali, H.M. El-Matbouly, E. Youssef

引用次数: 0

Electrode-source characteristic impedance match of CPW for LiNbO/sub 3/ optical modulators with and without ridge structure 带和不带脊结构的LiNbO/sub - 3光调制器CPW的极源特性阻抗匹配

Proceedings of the Eighteenth National Radio Science Conference. NRSC'2001 (IEEE Cat. No.01EX462) Pub Date : 2001-03-27 DOI: 10.1109/NRSC.2001.929418

A.A. Aboul-Enien, T. E. Taha, A.A. Abou El-Fal, K.A. Mostafa

引用次数: 2

Laser beam scattering from metallic sphere embedded in aerosol cloud 气溶胶云中金属球的激光散射

Proceedings of the Eighteenth National Radio Science Conference. NRSC'2001 (IEEE Cat. No.01EX462) Pub Date : 2001-03-27 DOI: 10.1109/NRSC.2001.929419

A. Elmahdy, A. M. Azzam, Y. Badr, M. Hassan, M. Aly

引用次数: 1

A secure image coding scheme using residue number system 一种基于剩余数系统的安全图像编码方案

Proceedings of the Eighteenth National Radio Science Conference. NRSC'2001 (IEEE Cat. No.01EX462) Pub Date : 2001-03-27 DOI: 10.1109/NRSC.2001.929397

A. Ammar, A. Al Kabbany, M. Youssef, A. Amam

引用次数: 26

Space fitting the uncorrelated interference patterns in constrained adaptive antenna arrays using neural networks 基于神经网络的约束自适应天线阵列非相关干扰图空间拟合

Proceedings of the Eighteenth National Radio Science Conference. NRSC'2001 (IEEE Cat. No.01EX462) Pub Date : 2001-03-27 DOI: 10.1109/NRSC.2001.929175

H. Elkamchouchi, W.F. Zamzam

{"title":"Space fitting the uncorrelated interference patterns in constrained adaptive antenna arrays using neural networks","authors":"H. Elkamchouchi, W.F. Zamzam","doi":"10.1109/NRSC.2001.929175","DOIUrl":"https://doi.org/10.1109/NRSC.2001.929175","url":null,"abstract":"An adaptive array antenna adjusts its element weightings so as to null out interference signals while maintaining a beam in the desired signal direction. This process of nulling out interferers has a constraint represented by the limited degrees of freedom. This puts limits on the number of requirements an array can achieve at a particular time. For instance, an N-element antenna array has N-1 degrees of freedom in its pattern. So if there are more interferers we need an array with a large number of elements. But here, we stop thinking about interferers as individual spot sources and we take into consideration their space distribution, their positions as long as their relative strengths, this is accomplished by constructing a general interference pattern and then studying this pattern to determine the optimal null positions. Next, the neural networks technique is used to adjust the array weights with their optimal values, which will give a general array pattern to meet the specified requirements. The previous process is fully described and illustrative examples are introduced.","PeriodicalId":123517,"journal":{"name":"Proceedings of the Eighteenth National Radio Science Conference. NRSC'2001 (IEEE Cat. No.01EX462)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115595626","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

FDTD analysis of a rectangular patch antenna on a general uniaxial anisotropic dielectric substrate 一般单轴各向异性介质基板上矩形贴片天线的时域有限差分分析

Proceedings of the Eighteenth National Radio Science Conference. NRSC'2001 (IEEE Cat. No.01EX462) Pub Date : 2001-03-27 DOI: 10.1109/NRSC.2001.929184

A.N. Mahmud, S. Obayya, A. Mitkees, H. Elmikati

引用次数: 2

A back multiplication algorithm (BMA) for decoding BCH codes 一种解码BCH码的反向乘法算法(BMA)

Proceedings of the Eighteenth National Radio Science Conference. NRSC'2001 (IEEE Cat. No.01EX462) Pub Date : 2001-03-27 DOI: 10.1109/NRSC.2001.929398

M. Abou El Dahab, E. Abd El Naiem, A.M. Abou El Wafa, M.M. Foda

引用次数: 0