تنزيل السيرة الذاتية

معلومات الاتصال

التواصل الاجتماعي

الباحث العلمي

أ. عبدالعاطي ابراهيم عمر عبدالله

  • المؤهل العلمي: ماجستير
  • الدرجة العلمية: محاضر
  • كلية الهندسة - جامعة الزيتونة

ملخص

عبدالعاطي عبدالله هو احد اعضاء هيئة التدريس بقسم الهندسة الكهربائية والالكترونية بكلية كلية الهندسة بالاضافة الى انه وكيل اللجنة العلمية بالكلية. يعمل السيد عبدالعاطي عبدالله بجامعة الزيتونة كـمحاضر مساعد منذ 2015-09-01 , وتم ترقيته كمحاضر منذ 2019-09-19 وله العديد من المنشورات العلمية في مجال تخصصه. من اهم اهتماماته البحثة: • Information Theory and coding . • Wireless Communications. • Digital Communications. • Optical Communications and optical devices. • Nano-Laser Structure and Surface Plasmons. • OFDM-MIMO and Massive MIMO techniques. • Wireless Channel Estimation . • Space modulation techniques • Large scale dynamic system level simulation (WCDMA, HSPA, LTE, LTE-Advance, 5G) • Cognitive Radio Networking. • Antennas and Wave propagation

المؤهلات

10 ,2014

ماجستير

الهندسة الكهربائية والالكترونية - شعبة الاتصالات
جامعة شفيلد- المملكة المتحدة

12 ,2007

بكالوريوس

الهندسة الكهربائية والالكترونية - شعبة الاتصالات
جامعة الزيتونه

الخبرة

2015 - 2017

محاضر لدورات انجليزي - الثقة

مدرب للدورة للمستويات من المبتدئ الى المتقدم ، تحضير لامتحان IELTS

2009 - 2012

مهندس اتصالات - المؤسسة الوطنية للنفط

مهندس صيانه في قسم الاتصالات wireline ; artificial left

2007 - 2012

مهندس تركيب - شركة البحر المتوسط

تركيب اجهزة حماية ، CCTV, منظومة حظور وانسراف والابواب الالكترونية

المنشورات

Performance of Spatial Modulation for Multiple-Antenna Wireless Systems Over Uncorrelated Rayleigh Flat Fading Channel

The trend towards achieving higher data rates in wireless communications is endless and requires sophisticated transmission mechanisms that are capable to deliver higher spectral efficiency. Multiple input Multiple output (MIMO) wireless communications were realized to have an inevitability in accelerating evolution of higher data rates. However, although MIMO technique achieves better diversity and antenna gain, it faces the problem of inter channel interference (ICI) due to the multiple number of radio frequency (RF) chains. Another major disadvantage of this mechanism is to use maximum likelihood (ML) detector for attaining better performance of bit error rate; however, it generates a significant decoding complexity which exponentially increases with increasing number of transmit antennas. For these reasons the attention has been shifted to introduce a new transmission mechanism that can overcome problems faced in conventional MEMO. Spatial modulation (SM) was the best candidate to resolve that issues and increase the spectral efficiency over multipath fading channel. In SM only a single antenna will be active for the period of data transmission, means only one RF chain is deployed. This entirely removes (ICI) and decreases decoding complexity. The contribution of this paper is to introduce the concepts of SM and evaluate its bit error rate (BER) performance over uncorrelated Rayleigh fading channel with the use of ML decoding algorithm.
Abdulati I. O. Abdullah, (12-2018)
Publisher's website


Performance of Spatial Modulation for Multiple-Antenna Wireless Systems Over Uncorrelated Rayleigh Flat Fading Channel

The trend towards achieving higher data rates in wireless communications is endless and requires sophisticated transmission mechanisms that are capable to deliver higher spectral efficiency. Multiple input Multiple output (MIMO) wireless communications were realized to have an inevitability in accelerating evolution of higher data rates. However, although MIMO technique achieves better diversity and antenna gain, it faces the problem of inter channel interference (ICI) due to the multiple number of radio frequency (RF) chains. Another major disadvantage of this mechanism is to use maximum likelihood (ML) detector for attaining better performance of bit error rate; however, it generates a significant decoding complexity which exponentially increases with increasing number of transmit antennas. For these reasons the attention has been shifted to introduce a new transmission mechanism that can overcome problems faced in conventional MEMO. Spatial modulation (SM) was the best candidate to resolve that issues and increase the spectral efficiency over multipath fading channel. In SM only a single antenna will be active for the period of data transmission, means only one RF chain is deployed. This entirely removes (ICI) and decreases decoding complexity. The contribution of this paper is to introduce the concepts of SM and evaluate its bit error rate (BER) performance over uncorrelated Rayleigh fading channel with the use of ML decoding algorithm.
Abdulati I. O. Abdullah, Ibrahim K. Shati , Ahmed H. Elshoshi, Abubaker M. Algatlawi, (12-2018)
Publisher's website


Modeling and Simulations of Surface Plasmon Waveguide Structures

This paper presents an investigation of the fabrication of the optical devices in terms of their characteristics based on the use of the electromagnetic waves. Planar waveguides are used to examine the field modes (bound modes) and the parameters required for this structure. The modifications are conducted on surface plasmons based waveguides. Simple symmetric dielectric slab structure is used and analyzed in terms of transverse electric mode (TE-Mode) and transverse magnetic mode (TM-Mode. The paper presents mathematical and numerical solutions for solving simple symmetric plasmons and provides simulations of surface plasmons for field confinement. Asymmetric TM-mode calculations for dielectric surface plasmons are also provided.
Moussa Hamdan, Abdulati Abdullah, (7-2016)
Publisher's website


Performance of MIMO Techniques over Rayleigh Fading Channel with Alamouti Space Time Block Coding

Spectrum efficiency, capacity and coverage of wireless networks are being the main concern for wireless communication researchers. The performance of wireless channel has been progressed using the technology of MIMO with Alamouti space time block coding (Alamouti-STBC). This technology results in a significant improvement, which could further develop the overall performance of wireless Local Area Network (LANs) and Wide Area Network (WANs) to achieve better data rate and reliability of communication system. The purpose of this paper is to study and evaluate bit error rate performance of Alamouti-STBC coding with MIMO techniques using Zero Forcing (ZF) and Maximum Likelihood Detection (MLD) at receiver over Rayleigh fading channel. Simulation is carried out using MATLAB.
Abdulati Abdullah, Moustafa Abdalla, Ibrahim Shati, (3-2018)
Publisher's website


Analysis and Performance Evaluation of Convolutional Codes over Binary Symmetric Channel Using MATLAB

The most common concern of any communication system is the data quality. There exist different components that can impact the quality of data during its conveying over the channel as noise, fading, etc. Forward error correcting codes (FEC) play a major role for overcoming this noise as it adds a control bits to the original data for error detection and correction. This paper aims at analyzing convolutional codes with different rates and evaluating its performance. Binary phase shift modulation (BPSK) scheme and binary symmetric channel (BSC) model are used. First a convolution encoder is presented and then additive white Gaussian noise (AWGN) is added. The paper uses maximum likelihood mechanism (Vetribi Algorithm) for decoding process. Simulations are carried out using MATLAB with Simulink tools. Bit error rate (BET) is used as testing parameter and results of system behavior for both coded and encoded are compared.
Abdulati Abdullah, Moussa Ali Hamdan, (4-2016)
Publisher's website