Publications

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2016
Ayadi, M. E. M. H., M. H. Ismail, and H. Alhennawi, "A Unified Approach for Probability of Detection Evaluation over Generalized Fading Channels", IET Communications, vol. 10, issue 12, pp. 1532-1541, 2016.
2015
Amin, B. S., Y. R. Ramadan, A. S. Ibrahim, and M. H. Ismail, "Power Allocation for Device-to-Device Communication Underlaying Massive MIMO Multicasting Networks", Proc. of IEEE Wireless Communications and Networking Conference (WCNC) 2015, New Orleans, LA, March 2015.
Alaa, A. M., M. H. Ismail, and H. Tawfik, "Opportunistic Spectrum Sharing using Dumb Basis Patterns: The Line-of-Sight Interference Scenario", in Proc. 2015 International Conference on Computing, Networking and Communications (ICNC 2015), Anaheim, CA, February 2015.
Mohamed, R., M. H. Ismail, and H. - A. M. Mourad, "Average Symbol Error Rate and Ergodic Capacity of Switch-and-Examine Combining Diversity Receivers over the α−μ Fading Channel", Annals of Telecommunications, vol. 70, issue 1-2, pp. 37-48, 2015.
Ibrahim, M. K., M. H. Ismail, and W. M. El-Kharashi, "A Novel Scheduling Algorithm for mmWave Mesh Networks Using Packet Aggregation", In Proc. 2015 IEEE Int. Conference on Electronics, Circuits, & Systems, Cairo, Egypt, 2015.
Abdelaal, R. A., K. Elsayed, and M. H. Ismail, "Optimized Joint Power and Resource Allocation for Coordinated Multi-Point Transmission for Multi-User LTE Advanced Systems", Wireless Personal Communications, vol. 83, issue 4, pp. 2497-2518, 2015.
2014
Rizk, G., A. H. Zahran, and M. H. Ismail, "AVIS: an Adaptive VIdeo Simulation Framework for Scalable Video", in Proc. 8th International Conference on Next Generation Mobile Applications, Services, and Technologies (NGMAST 2014), Oxford, UK, September 2014.
Ibrahim, S., A. H. Zahran, and M. H. Ismail, "SVC-DASH-M: Scalable Video Coding Dynamic Adaptive Streaming Over HTTP Using Multiple Connections", in Proc. International Conference on Telecommunications (ICT), Lisbon, Portugal, May 2014.
Elgendy, O. A., M. H. Ismail, and K. Elsayed, "Max-Min Fair Resource Allocation for LTE-Advanced Relay-Enhanced Cells", in Proc. IEEE Wireless Communications and Networking Conference (WCNC), Istanbul, Turkey, April 2014.
Alaa, A. M., M. H. Ismail, and H. Tawfik, "Spectrum Sensing Via Reconfigurable Antennas: Is Cooperation of Secondary Users Indispensable?", in Proc. IEEE Wireless Communications and Networking Conference (WCNC) 2014, Istanbul, Turkey, April 2014.
Fahim, M., M. H. Ismail, and H. Tawfik, "An Innovative Cooperative Spectrum Sensing Algorithm with Non-ideal Feedback Channels and Delay Considerations", Wireless Personal Communications, vol. 78, issue 1, pp. 313-332, 2014.
Abdelaal, R. A., K. Elsayed, and M. H. Ismail, "Joint Scheduling and Resource Allocation with Fairness Based on the Signal-to-Leakage-plus-Noise Ratio in the Downlink of CoMP Systems", Wireless Personal Communications, vol. 75, issue 4, pp. 1891–1913, 2014.
ElAyadi, M. M. H., and M. H. Ismail, "Novel Closed-Form Exact Expressions and Asymptotic Analysis for the Symbol Error Rate of Single and Multiple-Branch MRC and EGC Receivers over alpha-mu Fading", IEEE Transactions on Vehicular Technology, vol. 63, issue 9, pp. 4277-4291, 2014. [Download]
Ayadi, E. M. M. H., and M. H. Ismail, "Novel Tight Closed-form Bounds for the Symbol Error Rate of EGC and MRC Diversity Receivers Employing Linear Modulations over alpha − mu Fading", Wireless Personal Communications, vol. 77, issue 1, pp. 571-587, 2014.
Alhennawi, H. R., M. H. Ismail, and H. - A. M. Mourad, "Performance evaluation of energy detection over extended generalized-K (EGK) composite fading channels", Electronics Letters, vol. 50, issue 22, pp. 1643-1645, 2014.
2013
ElAyadi, M. M. H., and M. H. Ismail, "Novel Simple Bounds on the Probability of Error for EGC and MRC Diversity Receivers over α−μ Fading", Proc. of the 20th International Conference on Telecommunications (ICT 2013), Casablanca, Morocco, May, 2013.
Fahim, M., M. H. Ismail, and H. Tawfik, "Multi-stage Energy Detection Spectrum Sensing Using Group Intelligence", Proc. of the 18th IEEE Symposium on Computers and Communications (ISCC 2013), Split, Croatia, July, 2013.
Mohamed, R., M. H. Ismail, F. A. Newagy, and H. - A. M. Mourad, "Probability of Error and Ergodic Capacity of Switch-and-Examine Combining Diversity over the α−μ Fading Channel", Proc. of the 18th IEEE Symposium on Computers and Communications (ISCC 2013), Split, Croatia, July, 2013.
Mohamed, R., M. H. Ismail, F. Newagy, and H. - A. M. Mourad, "Closed-form Capacity Expressions for the α−μ Fading Channel with SC Diversity under Different Adaptive Transmission Strategies", Frequenz, vol. 2013, issue 3-4, pp. 127–137, 2013. Abstract

Stemming from the fact that the α-μ fading distribution is one of the very general fading models used in the literature to describe the small scale fading phenomenon, in this paper, closed-form expressions for the Shannon capacity of the α-μ fading channel operating under four main adaptive transmission strategies are derived assuming integer values for μ. These expressions are derived for the case of no diversity as well as for selection combining diversity with independent and identically distributed branches. The obtained expressions reduce to those previously derived in the literature for the Weibull as well as the Rayleigh fading cases, which are both special cases of the α-μ channel. Numerical results are presented for the capacity under the four adaptive transmission strategies and the effect of the fading parameter as well as the number of diversity branches is studied.

Ismail, M. H., and R. Mohamed, "Outage Probability Analysis of Selection and Switch-and-Stay Combining Diversity Receivers Over the α−μ Fading Channel with Co-Channel Interference", Wireless Personal Communications, vol. 71, issue 3: Springer US, pp. 2181-2195, 2013. Website
Gaber, A. H., M. H. Ismail, and H. - A. M. Mourad, "Outage Probability Analysis of Cooperative Diversity Networks Over Weibull and Weibull-Lognormal Channels", Wireless Personal Communications, vol. 70, no. 2: Springer US, pp. 695-708, 2013. AbstractWebsite
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2012
Elgendy, O. A., M. H. Ismail, and K. Elsayed, "On the Relay Placement Problem in a Multi-cell LTE-Advanced System with Co-channel Interference", Proc. of the 8th IEEE Int.Conf on Wireless and Mobile Computing, Networking and Communications (WiMob 2012), Barcelona, Spain, October, 2012. Abstract

One of the main problems in LTE-A networks is the small rates achieved by cell-edge users. This is due to the adoption of a frequency reuse factor of 1, which aims at increasing the overall capacity. This occurs, however, at the expense of increasing the interference level for cell-edge users. Cooperative communication through the use of relays is an efficient technique to solve this problem. However, careful placement of the relays is a crucial factor in determining the expected capacity gain. In this paper, the relay placement problem in an LTE-A network is studied, taking into consideration the effect of co-channel interference. An optimization framework is proposed to maximize either the total cell capacity or the total cell-edge capacity. Simulation results show a capacity gain factor of 8.027 for cell-edge users due to relay deployment, under 100% cell load in center cell and adjacent cells.

Mohamed, R., M. H. Ismail, and H. - A. M. Mourad, "Performance of Dual Selection and Switch-and-Stay Combining Diversity Receivers over the alpha-mu Fading Channel with Co-channel interference", Proc. of the Int. Symposium on Signals, Systems and Electronics (ISSSE 2012), Potsdam, Germany, October, 2012.
Abdelaal, R., K. Elsayed, and M. H. Ismail, "Cooperative Scheduling, Precoding, and Optimized Power Allocation for LTE-Advanced CoMP Systems", Wireless Days, Dublin, Ireland, November, 2012.
Elkotby, H., K. Elsayed, and M. H. Ismail, "Shrinking the Reuse Distance: Spectrally-Efficient Radio Resource Management in D2D-Enabled Cellular Networks with Interference Alignment", Wireless Days, Dublin, Ireland, November, 2012. Abstract

Enabling underlay direct Device-to-Device (D2D) communication mode in future cellular networks has good potential for spectrally-efficient and low-latency support of local media services. Recently, it has become evident that shrinking the reuse distance over which wireless resources are reused is a key enabler for achieving high spectral efficiency. Moreover, Interference Alignment (IA) based transmission can enhance the capacity of a wireless network by providing more degrees of freedom. In this work, we exploit clustering of D2D users, frequency reuse over clusters and then using IA to enhance the sum rate. Specifically, we show that in a D2D environment, it is possible to achieve significant gains in attainable rates by constructing clusters of D2D pairs and reuse the available radio resources over the clusters. Moreover, within a cluster, it is possible to further enhance the spectral efficiency by constructing small-sized groups of D2D pairs over which IA is applied to offer additional degrees of freedom. We show that resource reuse over the clusters offer overall rate increase proportional to the number of formed clusters. In addition, interference alignment offers up to 33% increase in the overall rates in the high transmission power regimes compared to the normal Point-to-Point (P2P) communication.

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