Thirteenth National Radio Science Conference. NRSC '96最新文献

Multi-user chirp modulation signals (M-CM) for efficient multiple-access communication systems 用于高效多址通信系统的多用户啁啾调制信号(M-CM)

Thirteenth National Radio Science Conference. NRSC '96 Pub Date : 1996-03-19 DOI: 10.1109/NRSC.1996.551120

S. El-Khamy, S. Shaaban, E.A. Thabet

引用次数: 11

Smart elliptical arrays 智能椭圆阵列

Thirteenth National Radio Science Conference. NRSC '96 Pub Date : 1996-03-19 DOI: 10.1109/NRSC.1996.551101

S. El-Khamy, N. Abdel-Kader

引用次数: 2

The weighted index beam propagation method (WIBPM) 加权折射率光束传播方法(WIBPM)

Thirteenth National Radio Science Conference. NRSC '96 Pub Date : 1996-03-19 DOI: 10.1109/NRSC.1996.551148

D. Khalil, T. Amer, H. Ragaie

引用次数: 0

Cancellation of multiple-access interference in wireless CDMA systems using eigen receivers 利用特征接收器消除无线CDMA系统中的多址干扰

Thirteenth National Radio Science Conference. NRSC '96 Pub Date : 1996-03-19 DOI: 10.1109/NRSC.1996.551136

S. El-Khamy, E. Youssef, M. Madkour

引用次数: 0

Radioholographic antenna measurements with extraterrestrial sources 无线电全息天线测量与地外来源

Thirteenth National Radio Science Conference. NRSC '96 Pub Date : 1996-03-19 DOI: 10.1109/NRSC.1996.551099

A. V. Kalinin, V.P. Maltcev, G. A. Kislyakov, V.S. Beagou, E. Kalinina

引用次数: 0

A non-destructive assay system for the verification of uranium fuel rods 一种用于铀燃料棒检定的非破坏性分析系统

Thirteenth National Radio Science Conference. NRSC '96 Pub Date : 1996-03-19 DOI: 10.1109/NRSC.1996.551151

I. Badawy, W. El-Gammal, M. Abo-El-Khier

引用次数: 3

Small signal GaAs MESFET model parameters extracted from measured S-parameters 从测量的s参数中提取小信号GaAs MESFET模型参数

Thirteenth National Radio Science Conference. NRSC '96 Pub Date : 1996-03-19 DOI: 10.1109/NRSC.1996.551140

M. K. Ahmed, S. Ibrahem

引用次数: 9

Adaptive system identification based on adaptation with data discarding 基于数据丢弃自适应的自适应系统辨识

Thirteenth National Radio Science Conference. NRSC '96 Pub Date : 1996-03-19 DOI: 10.1109/NRSC.1996.551134

E. Eweda, H. El-Deen Ahmed, M. A. Bassiouney, A. El-Azim El-Mahdi

{"title":"Adaptive system identification based on adaptation with data discarding","authors":"E. Eweda, H. El-Deen Ahmed, M. A. Bassiouney, A. El-Azim El-Mahdi","doi":"10.1109/NRSC.1996.551134","DOIUrl":"https://doi.org/10.1109/NRSC.1996.551134","url":null,"abstract":"At high data rates, the adaptation processor of the adaptive filter may be unable to perform the multiplications required by the adaptation algorithm each baud interval. A direct, but expensive, solution of this problem is to use parallel processing. The present paper presents a simple alternative solution that is suitable for the case of adaptive system identification. The idea of the proposed method is to make one iteration for each several baud intervals. The idea is implemented as follows. With N being the number of adaptive filter coefficients, N successive input samples and the corresponding sample of the system output are injected to the adaptation processor to perform one iteration. Input and output samples that come before the termination of this iteration are discarded by the adaptation processor. After termination of the iteration, new N input samples and the corresponding output sample are injected to the adaptation processor and the procedure is repeated. The above idea is applied to both the LMS algorithm and the sign algorithm. The effect of data discarding on the transient performance of the identification procedure is studied by computer simulations for both white and correlated inputs of the system.","PeriodicalId":127585,"journal":{"name":"Thirteenth National Radio Science Conference. NRSC '96","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132152186","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

Cryptographic security evaluation of MD4 hash function md5哈希函数的加密安全性评估

Thirteenth National Radio Science Conference. NRSC '96 Pub Date : 1996-03-19 DOI: 10.1109/NRSC.1996.551126

E. Abdel-Azeem, R. Seireg, S. Shaheen

{"title":"Cryptographic security evaluation of MD4 hash function","authors":"E. Abdel-Azeem, R. Seireg, S. Shaheen","doi":"10.1109/NRSC.1996.551126","DOIUrl":"https://doi.org/10.1109/NRSC.1996.551126","url":null,"abstract":"Cryptography is the only powerful tool for achieving high levels of information security in a computer networks environment. The ISO have proposed five security service groups including, confidentiality, authentication, data integrity, non-repudiation, and access control. Cryptography can support implementation of all these security services, by using various cryptographic techniques, which include among other things conventional secret key algorithms, public-key algorithms, authentication procedures, and different digital signature schemes. Hash functions, in cryptography, are used for digital signature applications and authentication procedures. It is advisable, for cryptographic reasons, to sign only hashed messages. A secure hash function must be a one-way and collision-free function. Cryptographic security of hash functions could be evaluated, so far, either by conducting detailed cryptanalysis, or by using computational complexity theory. Each of these methods has its own shortcomings. A new scheme for evaluating the cryptographic security of hash functions is proposed. The proposed scheme is simple, fast, and based on a solid mathematical model offered by Markov process. The proposed scheme is used to evaluate the cryptographic security of the Message Digest MD-4 algorithm. The results are in accordance with what was conjectured and published.","PeriodicalId":127585,"journal":{"name":"Thirteenth National Radio Science Conference. NRSC '96","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133246660","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: 3

A new iterative method for improving equalizer performance in mobile fading channels 一种改进移动衰落信道均衡器性能的新迭代方法

Thirteenth National Radio Science Conference. NRSC '96 Pub Date : 1996-03-19 DOI: 10.1109/NRSC.1996.551145

A. Ragab, M. M. Mokhtar

引用次数: 1