191 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Cairo UniversityEG17 papers
- The Ohio State UniversityUS16 papers
- Alexandria UniversityEG13 papers
- American University in CairoEG10 papers
- Qatar UniversityQA9 papers
- Egypt-Japan University of Science and TechnologyEG7 papers
- Ain Shams UniversityEG6 papers
- Goethe University FrankfurtDE5 papers
- Joint Institute for Nuclear ResearchRU5 papers
- Helwan UniversityEG4 papers
- Military Technical CollegeEG4 papers
- Princeton UniversityUS4 papers
10 papers · 1 filter
Adaptive Sensing and Transmission Durations for Cognitive Radios
Wessam Afifi, Ahmed Sultan, Mohammed Nafie
In a cognitive radio setting, secondary users opportunistically access the spectrum allocated to primary users. Finding the optimal sensing and transmission durations for the secon…
A Distributed Data Collection Algorithm for Wireless Sensor Networks with Persistent Storage Nodes
Salah A. Aly, Ahmed Ali-Eldin, H. Vincent Poor
A distributed data collection algorithm to accurately store and forward information obtained by wireless sensor networks is proposed. The proposed algorithm does not depend on the…
A Hidden Markov Model for Localization Using Low-End GSM Cell Phones
Mohamed Ibrahim, Moustafa Youssef
Research in location determination for GSM phones has gained interest recently as it enables a wide set of location based services. RSSI-based techniques have been the preferred me…
ARQ Security in Wi-Fi and RFID Networks
Mohamed Elsabagh, Yara Abdallah, Moustafa Youssef +1
In this paper, we present two practical ARQ-Based security schemes for Wi-Fi and RFID networks. Our proposed schemes enhance the confidentiality and authenticity functions of these…
A New Adaptive Channel Estimation for Frequency Selective Time Varying Fading OFDM Channels
Wessam M. Afifi, Hassan M. Elkamchouchi
In this paper a new algorithm for adaptive dynamic channel estimation for frequency selective time varying fading OFDM channels is proposed. The new algorithm adopts a new strategy…
FPGA Implementation of a Reconfigurable Viterbi Decoder for WiMAX Receiver
Sherif Welsen Shaker, Salwa Hussien Elramly, Khaled Ali Shehata
Field Programmable Gate Array technology (FPGA) is a highly configurable option for implementing many sophisticated signal processing tasks in Software Defined Radios (SDRs). Those…
Keys through ARQ: Theory and Practice
Yara Abdallah, Mohamed Abdel Latif, Moustafa Youssef +2
This paper develops a novel framework for sharing secret keys using the Automatic Repeat reQuest (ARQ) protocol. We first characterize the underlying information theoretic limits,…
HyberLoc: Providing Physical Layer Location Privacy in Hybrid Sensor Networks
Rania El-Badry, Ahmed Sultan, Moustafa Youssef
In many hybrid wireless sensor networks' applications, sensor nodes are deployed in hostile environments where trusted and un-trusted nodes co-exist. In anchor-based hybrid network…
CellSense: A Probabilistic RSSI-based GSM Positioning System
Mohamed Ibrahim, Moustafa Youssef
Context-aware applications have been gaining huge interest in the last few years. With cell phones becoming ubiquitous computing devices, cell phone localization has become an impo…
AROMA: Automatic Generation of Radio Maps for Localization Systems
Ahmed Eleryan, Mohamed Elsabagh, Moustafa Youssef
WLAN localization has become an active research field recently. Due to the wide WLAN deployment, WLAN localization provides ubiquitous coverage and adds to the value of the wireles…