Informatics Publishing Limited

Khaled A. Ramadan ¹, EL-Sayed M. El-Rabaie ¹, Mohmed Abd EL-Nabi ², Emad S. Hassan ¹, Fathi E. Abd El-Samie ¹, Xu Zhu ³

Affiliations
1 Department of Electronics and Electrical Communications Engineering, Menoufia University, 32952, Menouf, EG
2 Department of Electronics and Electrical Communications Engineering, Menoufia University, 32952, Menouf, EG
3 Department of Electrical Engineering and Electronics, The University of Liverpool, L69 3GJ, GB

Abstract

This paper presents the personification of the Digital Video Broadcasting Terrestrial (DVB-T) system with signal transformation (CPM-OFDM). The suggested formation collect the feature of palliating the Peak-to-Average Power Ratio (PAPR) trouble in the Power Amplifier (PA) in extension take usefulness of the channel frequency diversity and power efficiency of CPM. Simulation outcome presenting that the execution of the CPM-DVB-T system with multi-path fading is bestead than its performance with single-path fading. and we suggest a chaotic interleaving scheme for Digital Video Broadcasting with Different OFDM Version. The proposed structure combines the advantages of both a reduction of PAPR problem in power amplifier and excellent spectral energy compaction property of DCT-OFDM. The proposed chaotic interleaver DCT-OFDM-DVB-T systems are implemented with FDE to avoid the intricacy of the equalization using the minimum mean square error (MMSE) equalizer as a type of frequency domain equalizers.

Keywords

DVB-T, DCT, CPM, Interleaving PAPR, MMSE Equalizer, ZF Equalizer.

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Rania A. Ghazy ¹, El-Sayed M. El-Rabaie ², Moawad I. Dessouky ², Nawal A. El-Feshawy ³, Fathi E. Abd El-Samie ³

Affiliations
1 Department of Electronics and Communications, Menoufia University, Menouf, EG
2 Department of Electronics and Communications, Menoufia University, Menouf-32952, EG
3 Department of Electronics and Communications, Menoufia University, Menouf-32952, EG

Abstract

Intrusions and attacks have become a very serious problem in network world. This paper presents a statistical characterization of packet counts that can be used for network intrusion detection. The main idea is based on detecting any suspicious behavior in computer networks depending on the comparison between the correlation results of control and data planes in the presence and absence of attacks using histogram analysis. Signal processing tools such as median filtering, moving average filtering, and local variance estimators are exploited to help in developing network anomaly detection approaches. Therefore, detecting dissimilarity can indicate an abnormal behavior.

Keywords

Anomaly Detection, Statistics, Network Intrusion Detection Systems (NIDS).

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Rania A. Ghazy ¹, El-Sayed M. El-Rabaie ², Moawad I. Dessouky ², Nawal A. El-Feshawy ², Fathi E. Abd El-Samie ²

Affiliations
1 Menoufia University, Menouf, EG
2 Department of Electronics and Communications, Menoufia University, Menouf-32952, EG

Abstract

This Paper proposes a network based intrusion detection approach using anomaly detection in the presence of Denial of Service attacks (DoS). Flood based attacks are a common class of DoS attacks. DoS detection mechanisms that aim at detecting floods mainly look for sudden changes in the traffic and mark them anomalous. In this approach, network traffic is decomposed into control and data planes to study the relationship between them. As the data traffic generation is based on control traffic, the behavior of the two planes is expected to be similar during normal behavior. Therefore, detecting dissimilarity between the traffic of the two planes can indicate an abnormal behavior. Toward that objective, an Auto Regressive (AR) model has been used. Simulation results show that both the accuracy of the detection and less false positives.

Keywords

Auto Regressive (AR), Denial-of-Service (DoS), Network Intrusion Detection Systems (NIDS).

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Mohamad I. Elhadad ¹, El-Sayed M. El-Rabaie ¹, Abd-Elnaby Mohammed ¹

Affiliations
1 Department of Electronics and Electrical Communications, Menoufia University, Menouf, 32952, EG

Abstract

A key feature of Long Term Evolution (LTE) system is the adoption of advanced Radio Resource Management (RRM) procedures in order to increase the system performance. Packet scheduling mechanisms play a fundamental role, because they are responsible for choosing how to distribute radio resources among different stations. In this paper a modified Proportional Fair (PF) scheduling algorithm is proposed for capacity enhancement for LTE system and compared with the PF downlink scheduler, which is characterized by high fairness but with low spectral efficiency. Simulation results show that the proposed algorithm enhances the overall system capacity and also provides fairness in the distribution of the resources. The proposed algorithm improves the average cell throughput by more than 10.3 %, with approximately the same fairness level (2.6 % reduction) as compared with the conventional PF scheduling algorithm. 

Keywords

LTE, Packet Scheduling, PF, Fairness, RRM.

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Khaled A. Ramadan ¹, Emad S. Hassan ², Xu Zhu ³, Abd-Elnaby Mohammed ⁴, EL-Sayed M. El-Rabaie ⁵, Fathi E.Abd El-Samie ⁶

Affiliations
1 ERTU (Egyptian Radio & TV Union), Cairo, EG
2 Dept.of Electronics and Electrical Communications, Menoufia University, EG
3 Huazhong University of Science and Technology, Wuhan, CN
4 Department of Electronics and Electrical Communication, Menoufia University, Menouf, EG
5 Electronic and Communication Engineering Dept., Menoufia University, EG
6 Department of Electronics and Electrical Communications, Menoufia University, Menouf, EG

Abstract

In this paper, we study the performance of the Digital Video Broadcasting-Terrestrial (DVB-T) system with Continuous Phase Modulation Orthogonal Frequency Division Multiplexing(CPM-OFDM). The proposed structure combines the advantage of mitigating the Peak-to-Average Power Ratio (PAPR) problem in the Power Amplifier (PA) in addition to exploiting the channel frequency diversity and power efficiency of CPM. The proposed CPM-OFDMDVB-T system is implemented with Frequency-Domain Equalization(FDE) to avoid the complexity of the equalization. Two types of frequency domain equalizers are considered and compared for performance evaluation of the system; the Zero-Forcing (ZF)equalizer and the Minimum Mean Square Error (MMSE) equalizer.Simulation results show that the performance of the CPM-OFDMDVB-T system with multi-path fading is better than its performance with single-path fading.

Keywords

DVB-T, OFDM, CPM, ZF Equalizer, MMSE Equalizer, PAPR.

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Mohammed Y. Abbass ¹, Safey A. Abdelwahab ¹, Salah M. Diab ², Bassiony M. Salam ², El-Sayed M. El-Rabaie ², Fathi E. Abd El-Samie ², Said S. Haggag ³

Affiliations
1 Engineering Department, Nuclear Research Center, Atomic Energy Authority, EG
2 Department of Electronics and Electrical Communications, Menoufia University, Menouf, EG
3 Nuclear Research Center, Atomic Energy Authority, EG

Abstract

This paper deals with the problem of blind separation of digital images from mixtures. A method to solve this problem is blind source separation (BSS) using independent component analysis (ICA). It proposes a wavelet based ICA method using Kurtosis for blind image source separation. In this method, the observations are transformed into an adequate representation using wavelet packets decomposition and Kurtosis criterion. The simulation results of performance measures show a considerable improvement when compared to FastICA. The Peak Signal-to-Noise Ratio (PSNR), Signal-to-Noise Ratio (SNR), Root Mean Square Error (RMSE) and and Segmental Signal-to-Noise Ratio (SNRseg) are used to evaluate the quality of the separated images.

Keywords

Blind Source Separation (BSS), ICA, Kurtosis.

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Ehab H. Elshazly ¹, Mahmoud A. Ashour ¹, El-Sayed M. El-Rabaie ², Alaaeldin M. Abbas ³, Fathi E. Abd El-Samie ³, H. B. Kazemian ⁴

Affiliations
1 Department of English, NCRRT, EG
2 Department of Electronics and Electrical Communications, Faculty of Electronic Engineering, Menoufia University, Menouf, 32952, EG
3 Department of Electronics and Electrical Communications, Faculty of Electronic Engineering, Menoufia University, Menouf, 32952, EG
4 London Metropolitan University, GB

Abstract

In this work, we present a secure and robust digital image watermarking algorithm using both the Discrete Wavelet Transform (DWT) and the Fractional Fourier Transform (FrFT). The main purpose of the paper is to obtain a robust watermarking algorithm that is secure and that allows multiple watermarks to be embedded in the same cover image. We first decompose the host image into its sub-bands with the 2-D DWT. After that, we implement the 2-D FrFT on the selected sub-bands. Two random Pseudo-Noise (PN) sequences are used to modulate the selected FrFT coefficients according to the watermark pixels and inverse transforms are performed to get the watermarked image. In watermark extraction, we do not need the original image. We just need the two PN sequences used in the embedding process and the watermark size. So, a correlation coefficient is used to determine whether the extracted pixel is one or zero. The proposed algorithm shows improved security, capacity and imperceptibility. Also, robustness is still within the acceptable range under different attacks.

Keywords

Watermarking, DWT, FrFT, Security, and Robustness.

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Bidaa Mortada ¹, El-Sayed M. El-Rabaie ², Mohamad F. El-Kordy ³, Osama Zahran ³, Fathi E. Abd El-Samie ²

Affiliations
1 Al-Menofia University, EG
2 Menoufia University, EG
3 Menoufia University, Menouf, EG

Abstract

Intrinsic Raman spectroscopy (IRS) is a technique to correct turbidity-induced Raman spectral distortions, resulting in the intrinsic Raman spectrum that would be observed in the absence of scattering and absorption. In this paper, we develop a closed form expression relating the observed and intrinsic Raman spectra through diffuse reflectance using a numerical technique. Also, we study the dependence of this expression on sample size and elastic scattering anisotropy. We compare the behavior   at various turbidities, at various collection spot radii, for different sample sizes and for various values of elastic scattering anisotropy () to get best fitting with minimum error and to have an accurate relation between observed and intrinsic Raman spectra.

Keywords

Diffuse Reflectance (R_d), Observed Raman Spectrum (Ram_OBS), Elastic Scattering Anisotropy(g) and Intrinsic Raman Spectrum(Ram_int).

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