Publications

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2013
Soliman, H. M., O. A. Nasr, and M. M. Khairy, "Analysis and optimization of backhaul sharing in CoMP", Personal Indoor and Mobile Radio Communications (PIMRC), 2013 IEEE 24th International Symposium on: IEEE, pp. 1013–1018, 2013. Abstract
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Ali, N., O. Nasr, and others, "WSN lifetime prolongation for deterministic distributions using a hierarchical routing protocol", AFRICON, 2013: IEEE, pp. 1–5, 2013. Abstract
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2012
Sakran, H., M. Shokair, O. Nasr, S. El-Rabaie, and A. A. El-Azm, "Proposed relay selection scheme for physical layer security in cognitive radio networks", Communications, IET, vol. 6, no. 16, pp. 2676-2687, November, 2012. Abstract

In this study, the physical layer security for cognitive radio network (CRN) will be investigated in which a secondary user transmitter (SU-Tx) sends confidential information to a SU receiver (SU-Rx) on the same frequency band of a primary user (PU) in the presence of an eavesdropper receiver. Moreover, relay selection scheme is proposed for the security constrained CRNs with single eavesdropper, multiple eavesdroppers and PUs. The proposed scheme selects a trusted decode and forward relay to assist the SU-Tx and maximise the achievable secrecy rate that is subjected to the interference power constraints at the PUs for the different number of eavesdroppers and PUs under available channel knowledge. The SU cooperates with relays only when a high secrecy rate is achieved. Secrecy rate and secrecy outage probability are the two performance metrics that are used to verify the effectiveness of the proposed scheme although asymptotic approximations of the secrecy outage probability are also derived. Simulation and analytical results demonstrate that the performance improvement of the proposed scheme reaches to the double relative to the conventional scheme for the secrecy capacity.

Awad, A., O. A. Nasr, and M. M. Khairy, "Mixed TDMA/Simultaneous-Transmission Scheduling for Delay Sensitive Applications", International Wireless Communications and Mobile Computing Conference (IWCMC), Cyprus, 27-31 August, 2012. Abstract

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Sakran, H., O. Nasr, and M. Shokair, "An efficient adaptive technique with low complexity for reducing papr in OFDM-based cognitive radio", ISRN Signal Processing, vol. 2012: Hindawi Publishing Corporation, 2012. Abstract
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Said, M. A., O. A. Nasr, and A. F. Shalash, "Embedded reconfigurable synchronization & acquisition ASIP for a multi-standard OFDM receiver.", EURASIP J. Emb. Sys., vol. 2012, pp. 2, 2012. Abstract
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Soliman, H. M., O. A. Nasr, and M. M. Khairy, "Fair allocation of backhaul resources in multi-cell MIMO coordinated beamforming", Wireless Communications and Networking Conference (WCNC), 2012 IEEE: IEEE, pp. 1930–1935, 2012. Abstract
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2011
Hassan, M. H., and O. A. Nasr, "Adaptive spectrum sensing of wireless microphones with noise uncertainty", Personal Indoor and Mobile Radio Communications (PIMRC), 2011 IEEE 22nd International Symposium on: IEEE, pp. 445–450, 2011. Abstract
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Hamdy, M., O. A. Nasr, and A. F. Shalash, "ASIP design of a reconfigurable channel estimator for OFDM systems", Microelectronics (ICM), 2011 International Conference on: IEEE, pp. 1–5, 2011. Abstract
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Awad, A., O. A. Nasr, and M. M. Khairy, "Energy-aware routing for delay-sensitive applications over wireless multihop mesh networks", Wireless Communications and Mobile Computing Conference (IWCMC), 2011 7th International: IEEE, pp. 1075–1080, 2011. Abstract
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Soliman, H. M., O. A. Nasr, and M. M. Khairy, "Fair allocation of backhaul resources in multi-cell mimo co-operative networks", arXiv preprint arXiv:1106.2345, 2011. Abstract
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Soliman, H. M., A. A. Naguib, O. A. Nasr, M. M. Khairy, and K. Elsayed, "Joint power and backhaul bits allocation for coordinated multi-point transmission", Wireless Communication Systems (ISWCS), 2011 8th International Symposium on: IEEE, pp. 76–80, 2011. Abstract
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Awad, A., O. A. Nasr, and M. M. Khairy, "Multi-user cross-layer optimization for delay-sensitive applications over wireless multihop mesh networks", Personal Indoor and Mobile Radio Communications (PIMRC), 2011 IEEE 22nd International Symposium on: IEEE, pp. 2289–2294, 2011. Abstract
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2010
Nasr, O. A., and B. Daneshrad, "Circuit-energy aware discrete bit loading", Communications (ICC), 2010 IEEE International Conference on: IEEE, pp. 1–5, 2010. Abstract
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Nasr, O. A., O. Y. Takeshita, W. Zhu, and B. Daneshrad, "Field trial results of a 4x4 MIMO-OFDM real time testbed", Communications (ICC), 2010 IEEE International Conference on: IEEE, pp. 1–5, 2010. Abstract
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Nasr, O. A., M. van der Schaar, and B. Daneshrad, "A unique beamforming-based equilibrium in multi-user random access SIMO networks", IEEE Communications Letters, vol. 14, no. 2, pp. 160–162, 2010. Abstract
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2009
Nasr, O. A., and B. Daneshrad, "Design and FPGA implementation an accurate real time 3$\times$ 4 MIMO channel emulator", Signals, Systems and Computers, 2009 Conference Record of the Forty-Third Asilomar Conference on: IEEE, pp. 764–768, 2009. Abstract
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Nasr, O. A., MIMO link adaptation for real systems, : UNIVERSITY OF CALIFORNIA, LOS ANGELES, 2009. Abstract
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2006
Zhu, W., B. Daneshrad, J. Bhatia, J. Chen, H. - S. Kim, K. Mohammed, O. Nasr, S. Sasi, A. Shah, and M. Tsai, "A real time MIMO OFDM testbed for cognitive radio & networking research", Proceedings of the 1st international workshop on Wireless network testbeds, experimental evaluation & characterization: ACM, pp. 115–116, 2006. Abstract
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