El‐Sayed A. El‐Badawy

Alexandria University

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i-10 index

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Moustafa H. Aly

Arab Academy for Science, Technology, and Maritime Transport

Hossam M. H. Shalaby

Alexandria University

Ashraf G. Elmeligy

Alexandria University

Yasser S. Abdalla

Suez University

Sherif M. Sharroush

Port Said University

Ahmed A. S. Dessouki

Port Said University

Mohamed R. M. Rizk

Alexandria University

Ahmed F. Mashaal

Alexandria University

Reda Elsheshtawy

Alexandria University

F.Z. El-Halafawy

Menoufia University

Cooperative Institutions

Alexandria University

Arab Academy for Science, Technology, and Maritime Transport

Menoufia University

Cairo University

Ain Shams University

Armed Forces College of Medicine

Military Technical College

Alexandria Higher Institute of Engineering and Technology

Mansoura University

Al-Azhar University

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An Intersecting Cortical Model Based Framework for Human Face Recognition

DOAJ (DOAJ: Directory of Open Access Journals) (2008)

Ahmed Mahgoub Amira A. Ebeid Hossam-El-Deen M. Abdel-Baky El‐Sayed A. El‐Badawy

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Citations (7)

A more comprehensive analysis of a microstrip antenna in the spectral domain

El‐Sayed A. El‐Badawy Darwish Abd El Aziz Mahfuzur Rahman

Calculations are presented for the resonance frequency using the potential approach in the spectral domain with basis functions. A comparison between the calculated resonance frequencies which are determined using different models (transmission line model, cavity model, potential approach, and the immittance method) is carried out. The field pattern in the E-plane and H-plane for a rectangular microstrip antenna has been calculated using the potential approach and a comparison with that determined using immittance method is carried out.< >

Immittance

Spectral Analysis

10.1109/mwscas.1990.140668

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Citations (1)

A secured chaos encrypted mode-S aircraft identification friend or foe (IFF) system

El‐Sayed A. El‐Badawy Waled El-Masry Mohamed Mokhtar Alaa S. Hafez

This paper introduces a new technique for aircraft identification friend or foe (IFF). The technique is based on using a proposed Chaos Advanced Encryption Standard (AES) with mode-S IFF. AES has a key size of 128 bits and a substitution-linear transformation network with 10 rounds. The sensitivity of the chaos initial condition gives the algorithm the ability to use as a second key. The first key was assigned using a soft look-up table used periodically. The second key was assigned using the date of the current day by both interrogator and the transponder. This technique gives the system more security and confidentiality which is compatible with mode-S IFF interrogation and reply messages format. It requests a new data on the reply signal. This data increase the radar performance for detection and tracking the friend targets in active and passive jamming environments. The results obtained from this technique on the simulated interrogator and transponder signals shows that this scheme can be easily implemented and provide the air defence system a secured aircraft authentication.

Transponder (aeronautics)

Secondary surveillance radar

Identification

Mode (computer interface)

Table (database)

10.1109/icspcs.2010.5709756

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Citations (14)

A comparison between N-type and P-type InP LHL IMPATT diodes

El‐Sayed A. El‐Badawy Said H. Ibrahim Hosny A. El-Motaafy

This paper presents a comparison between the performance of N- and P-type InP IMPATT diodes. This is important to deeply understand the operation of these devices. For the P-type diodes, it is found that the operation is always according to the conventional IMPATT mode. The depletion-layer-width modulation is the main factor responsible for the lower efficiency. This effect causes the induced current to undergo a dip at the worst time in the cycle and delays the extraction of the carriers. It is indicated that the velocity-field characteristic of N-type InP material is the main factor responsible for the high-efficiency operation of N-type IMPATTs. During this high-efficiency operation, the avalanche-generated packet of electrons is bunched and accelerated. It may also be prematurely collected. This causes the induced current to have one or two additional peaks at the proper phase angles in the RF cycle.

IMPATT diode

Modulation (music)

10.1109/antem.2000.7851663

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Citations (0)

Immunity of the R3T Random Access Optical CDMA Protocol against Receiver Noise

National Radio Science Conference (2007)

Ziad A. El-Sahn Y. Abdelmalek Hossam M. H. Shalaby El‐Sayed A. El‐Badawy

The effect of both shot noise and thermal noise on the performance of the optical code-division multiple- access (OCDMA) round robin receiver/transmitter (R ³ T) protocol is examined. Several performance measures, namely, the steady state system throughput, the protocol efficiency, and the average packet delay are evaluated. Our results reveal that the R ³ T is immune against both thermal and shot noise. We found out that there are optimum values for the laser power to compensate for this degradation.

10.1109/nrsc.2007.371398

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Improvement of Radio Frequency Identification Security Using New Hybrid Advanced Encryption Standard Substitution Box by Chaotic Maps

Electronics (2020)

Amira S. El Batouty Hania H. Farag Amr Mokhtar El‐Sayed A. El‐Badawy Moustafa H. Aly

Radio Frequency Identification (RFID) technology is widely utilized by businesses, organizations and wireless communication systems. RFID technology is secured using different ways of data encryption, e.g., Advanced Encryption Standard (AES). The Substitution Box (S-Box) is the core of AES. In this paper, a new algorithm is proposed to generate a modified S-Box with new keys, specifically a key and plaintext-dependent S-Box using an improved RC4 encryption algorithm with Logistic Chaotic Maps (LCM). The strength of the proposed S-Box is tested throughout the paper, and compared against the state-of-the-art S-Box implementations, namely, the static S-Box, dynamic S-box, KSA and PRGA S-Box, and RC4 S-Boxes with Henon chaotic maps. The comparison between the state-of-the-art S-Boxes and the proposed S-Box demonstrates that the use of the Logistic Chaotic Map increases the security of the S-Box and makes the differential and linear cryptography more sturdy. In particular, using the strict avalanche test, we demonstrate that the proposed S-Box improves the security by achieving a cipher text bit-flip ratio of 0.4765, which is closer to 0.5 (where half the bits are flipped), while maintaining a minimum elapsed time of 19 milliseconds for encryption and decryption.

S-box

RC4

Plain text

Logistic map

10.3390/electronics9071168

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Citations (9)

On the Performance of Few-Mode EDFAs with Bidirectional Pumping

Asia Communications and Photonics Conference 2021 (2016)

Nihal M. Anwar Hesham A. Youssef Ziad A. El-Sahn Moustafa H. Aly El‐Sayed A. El‐Badawy

Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text N. M. Anwar, H. A. Youssef, Z. A. El-Sahn, M. H. Aly, and E. A. El-Badawy, "On the Performance of Few-Mode EDFAs with Bidirectional Pumping," in Asia Communications and Photonics Conference 2016, OSA Technical Digest (online) (Optica Publishing Group, 2016), paper AF2A.104. Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article

Mode (computer interface)

10.1364/acpc.2016.af2a.104

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Citations (1)

Impact of technology scaling on the performance of domino CMOS logic

International Conference on Electronic Design (2008)

Sherif M. Sharroush Yasser S. Abdalla Ahmed A. S. Dessouki El‐Sayed A. El‐Badawy

Domino CMOS logic circuit family finds a wide variety of applications in microprocessors, digital signal processors, and dynamic memory due to their high speed and low device count. However, there are inevitable problems that degrade the noise immunity of this family; they are the inevitable leakage current and the charge sharing. Added to the drawbacks is the relatively large power consumption, especially if compared to the static complementary CMOS logic family. To make the matter worse, these drawbacks are more tactile with the scaling of CMOS technology from one generation to the next. In this paper, the impact of CMOS technology scaling on the performance of domino CMOS logic will be investigated. Specifically, the need to decrease the dynamic power consumption forces the designer to use a lower power-supply voltage. This in turn necessitates the reduction of threshold voltage to maintain the performance with the associated increase in subthreshold leakage current. So, a properly sized PMOS keeper must be used to compensate for this leakage. It will be found that the speed, which is the major advantage of domino logic compared to other logic styles, will degrade with CMOS technology scaling due to the contention current of the keeper. A technique that extends the life time of domino logic in spite of CMOS technology scaling will be proposed. In fact, this technique aims to alleviate the effects of threshold-voltage reduction and the associated increase in subthreshold leakage on the noise immunity and the size of the PMOS keeper through the use of a current sensing circuit. This technique will be simulated for the 0.13 mum technology with power-supply voltage, V _DD =1.2 V. Simulation results show that the proposed technique enhances the noise margin by approximately 560 mV and enhances the speed by approximately 56% compared to the conventional technique in which the gate of the PMOS keeper is connected to the output terminal, however, at the cost of an area penalty.

Domino logic

Subthreshold conduction

Domino

Leakage (economics)

Noise margin

10.1109/iced.2008.4786755

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Citations (15)

Analysis of the effect of shot noise on the performance of static OC<sup>2</sup>DMA correlation receivers using Fiber Bragg Grating

Ahmed F. Mashaal Reda Elsheshtawy Ashraf G. Elmeligy El‐Sayed A. El‐Badawy

The effect of shot noise on the performance of 1D/2D wavelength hopping/time spreading CDMA static noisy system is analyzed. The probability of error is calculated for general systems employing asymmetric prime-hop codes (APHCs). A comparison is held between the performance of static: 1D, 2D, and 1D/2D (C ² DMA) correlation receivers under the effect of shot noise. The analysis reveals that the performance of the static noisy C ² DMA correlation receiver is better than both the static 1D CDMA correlation receiver and the static 2D CDMA correlation receiver.

10.1109/icist.2012.6221781

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Citations (2)

A space wavelet block codes MIMO SC-WDMA systems

Physical Communication (2019)

Ehab F. Badran Abdullah Y. Alamri Mohamed Mokhtar El‐Sayed A. El‐Badawy

Transceiver

Spectral Efficiency

10.1016/j.phycom.2019.100804

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Citations (4)