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Dr. Roshdy H.M. Hafez: List of publications

Papers Published in Refereed Journals and Book Chapter (J):

J28   A. Aizaz U. Chaudhry, Nazia Ahmad, and Roshdy H. M. Hafez, “Improving Throughput and Fairness by Improved Channel Assignment Using Topology Control Based on Power Control for Multi-Radio Multi-Channel Wireless Mesh Networks,” submitted to EURASIP Journal on Wireless Communications and Networking, Special Issue on Topology Control in Wireless Ad Hoc and Sensor Networks, May 2012

J27   R. M. Legnain, R. H. M. Hafez and A. M. Legnain, "Improved Spatial Modulation for High Spectral Efficiency", International Journal for Distributed and Parallel Systems (IJDPS), vol. 3 No. 2, March 2012

J26   A. U. Chaudhry and R. H. M. Hafez: "Channel Assignment Using Topology Control Based on Power Control In Wireless Mesh Network".  Chapter in a book entitled: " Wireless Mesh Networks", ISBN 979-953-307-833-4., 2012

J25   J.S. Dahman, R.H.M. Hafez and R. Bultitude, “Angle-of-Departure-Aided Opportunistic Space-Division Multiple Access for MIMO Applications”  IEEE Transactions on Wireless Communications, vol. 9 No 4, April, 2010

J24   H. J. Zhu, R. H.M. Hafez and J. Sydor, "Cross Layer Scheduling Algorithms for Different Rate Traffic in OFDM Broadband Wireless Systems" International Journal of Computer Networks & Communications (IJCNC), Volume 1, No. 3, October, 2009

J23   G. Dahman, R. Bultitude and R.H.M. Hafez, "The Use of Frequency-Orthogonal Pseudonoise (FOPN) Sounding Signals for Identifying Transmissions From Different Transmit Antennas", IEEE Antennas and Wireless Propagation Letters, Volume: 8, Issue: 1, 2009.

J22   H. Zhu, and R.H.M. Hafez, “Scheduling schemes for multimedia service in wireless OFDM systems” Wireless Communications, IEEE [see also IEEE Personal Communications] Volume 14,  Issue 5,  pp: 99 – 105,  October  2007.

J21   H. Zhu, and R.H.M. Hafez, "Performance of Scheduling Algorithms Under Mobility for Multimedia Services in OFDM Systems" IEICE Transactions in Communications, vol. E-B, no. 1, October 2006

J20   N.H. Dawod, I.D. Marsland, and R.H.M. Hafez, "Improved Transmit Null Steering for MIMO-OFDM Downlinks with Distributed Base Station Antenna Arrays" IEEE Journal on Selected Areas in Communications, vol. 24, no. 3, pp 419-426, March 2006.

J19   I. Haroun, I. Lambadaris and R.H.M. Hafez,"Building Wireless Sensor Networks" Microwave and RF Magazine, September 2005.

J18   I. Haroun, T. Kenny and R.H.M. Hafez, “Ultra Wideband as a Short-Range Ultra-High-Speed Wireless Technology”, RF Design Magazine, August 2004.

J17   I. Haroun, F. Gouin and R. Hafez,“Experimental Study of 802.11b WLAN™s over optical Fiber”, Microwave Magazine, May, 2003.

J16   T. Kunz, M. El Shentenawy, A. Gaddah and R. Hafez, "Image transcoding for wireless WWW access: The user perspective", Proceedings of Multimedia Computing and Networking 2002, editors M. Kienzle and P. Shenoy, SPIE, Vol. 4673, pages 28-33, January 2002.

J15   F. Hendessi, A.U.H.Sheikh and R.H.M. Hafez, "Co-Channel and Adjacent Channels Interference in Wireless Cellular Communications", Wireless Personal Communications, Volume 12, Issue 3, March 2000.

J14   P.R. Larijani and R.H.M. Hafez, "A Frame Work for Distributed Access Control n Multimedia Wireless CDMA Networks", special issue on Wireless Systems, The Arabian Journal for Science and Eng. 1999.

J13   G.R. Rajugopal and R.H.M. Hafez, "Adaptive rate controlled robust video communication over packet wireless networks", ACM, Mobile Networks and Applications 3, pp 33-47, 1998.

J12   P.R.Larijani, J.W.Chinneck, R. H.Hafez, "Non-linear power control in multimedia CDMA wireless networks", IEEE Communication Letters, Sept. 1998.

J11   N. Movahhedinia, G. Stamatelos and R.H.M. Hafez, "A Time-slot assignment strategy for ATM broadband indoor wireless networks", Wireless Personal Comm. 5 Journal, pp 89-111, 1997.

J10   C.G. Zhang, R.H.M. Hafez and D.D. Falconer, "Traffic Handling Capability of a Broadband Indoor Wireless Network Using CDMA Multiple Access", Journal on Selected Areas in Communications , Vol. 12, No. 4, May, 1994.

J9     Golestaneh, R.H.M. Hafez and S.A. Mahmoud, "The Effect of Adjacent Channel Interference on the Capacity of FDMA Cellular Systems",IEEE Trans. on Veh. Tech., Vol. 43, No. 4, pp. 946-954, November 1994.

J8     J.F. Lemieux, M. El-Tanany and R.H.M. Hafez, "Experimental Evaluation of Frequency, Space and Polarization Diversity of Indoor Radio Channels", IEEE Transactions on Vehicular Technology , Vol. 40, No. 3, August, 1991.

J7     R.A.Goubran, R.H.M.Hafez and A.U.H.Sheikh,"Implementation of a Real Time Channel Simulator on a DSP Chip", IEEE Trans. on Inst. and Measur., Vol. IM-40, No.4, August 1991.

J6     R.H.M.Hafez, S.Towaij and R.A.Goubran, "The Effect of User's Geographical Distribution on the Utilization of Radio Spectrum", IEEE Trans. on Electromagnetic Compatibility, Vol. 32, Issue 4, November 1990.

J5     R.H.M.Hafez, A.U.H.Sheikh and B.McPhail, "Experimental Evaluation of Packet Error Rates for the 850 MHz Mobile Channel",IEE Proceedings, August 1985.

J4     R.H.M.Hafez, A.E.El-Hakeem and S.A.Mahmoud, "Spread Spectrum Access in Two-Hop CATV Data Networks", IEEE Journal on Selected Areas in Comm., March 1985.

J3     A.E.El-Hakeem, R.H.M.Hafez and S.A.Mahmoud, "Spread Spectrum Access to Mixed Voice/Data Local Area Networks", IEEE Journal on Selected Areas in Comm., Vol. SAC-1, No.6, Dec. 1983.

J2     R.H.M.Hafez, W.J.Chudobiak and J.S.Whight, "The Attenuation Rate in Fresh Water at VHF Frequencies", IEEE Trans. on Instrumentation and measurement, Vol. IM-28, No.1, March 1979.

J1     W.J.Chudobiak, B.A.Syrett and R.H.M.Hafez, "Recent Advances in Broadband VHF and UHF Transmission Line Methods for Moisture Content and Dielectric Constant Measurements" IEEE Trans. On Instrumentation and Measurement, Vol. IM-28, No.4., December 1979.

Papers Published in Refereed Conferences (C):

C88  R. Sabouni and R. H. M. Hafez, "Performance of DSRC for V2V Communications in Multiple Environments", CCECE, 2012

C87  R. M Legnain, R. H. M. Hafez, I. Marsland and A. Legnain, "Two-Way Quantize and Forward Relaying with STBC", CCECE, 2012

C86  R. M Legnain, R. H. M. Hafez, I. Marsland and A. Legnain, "Multiuser XOR-and-Forward Relaying Using Almouti STBC", CCECE, 2012

C85  A. Alabeedi and R. H. M. Hafez, "Radio Resources Reuse and Partitioning for OFDMA Multi-hop Relay Cellular Networks", 5th International Conference on Signal Processing and Communication Systems, December,  2011

C84  R. M. Legnain, R. H. M. Hafez, "MIMO two-way relay communication based on Alamouti code", CCECE2011, 470-474, 2011

C83  N. Ahmad, A. U. Chaudhry, and Roshdy H. M. Hafez, “Enhanced Topology-Controlled Interference-Aware Channel Assignment for Multi-Radio Multi-Channel Wireless Mesh Networks,” in proc. of 2011 IFIP Wireless Days, October 2011

C82  A. U. Chaudhry, Roshdy H. M. Hafez, Osama Aboul-Magd, and Samy A. Mahmoud, “Fault-Tolerant and Scalable Channel Assignment for Multi-Radio Multi-Channel IEEE 802.11a-based Wireless Mesh Networks,” in proc. of IEEE Globecom 2010 Workshop on Mobile Computing and Emerging Communication Networks (MCECN' 2010), December 2010

C81  A. U. Chaudhry, Roshdy H. M. Hafez, Osama Aboul-Magd, and Samy A. Mahmoud, “Throughput Improvement in Multi-Radio Multi-Channel 802.11a-based Wireless Mesh Networks,” in proc. of IEEE Globecom. December 2010

C80  Barnawi A and Hafez R, “A Time & Energy Efficient Topology Discovery and Scheduling Protocol for Wireless Sensor Networks”, Symposium on Embedded and Pervasive Systems (EPS-09), Vancouver, Canada 2009

C79  Ghassan Dahman and Roshdy Hafez: “Angle-of-Departure-Aided Opportunistic Space-Division Multiple Access”, CNSR2009, Moncton New Brunswick, Canada [Best Paper Award], 2009.

C78  A. Barnawi, R. H. M. Hafez; "PROGRESSIVE: a topology discovery and scheduling protocol for wireless sensor networks". MSWiM 325-328, 2009.

C77  Abdulaziz Barnawi and R.H.M Hafez, “Performance of TDMA Scheduling Algorithms in the Presence of Data Correlation in Sensor Networks",  IEEE Canadian Conference on Electrical and Computer Engineering, 2008.

C76  Abdulaziz Barnawi, Roshdy H. M. Hafez: TDMA Scheduling for Data Gathering in Wireless Sensor Networks. ICWN 2008: 94-100, 2008.

C75  G. Dahman1, R.J.C. Bultitude, and R.H.M.Hafez, “A method for Identifying Simultaneously-Transmitted Signals from Different Transmit Antennas in Multi-Antenna Channel Sounding Experiments” North American Radio Science Meeting URSI (Chicago, USA) August 2008.

C74  G. Dahman, R. Bultitude, R. H.M. Hafez, and  Y. DeJong, “Estimation and Analysis of Single-Directional Multipath Information from 2.25 GHz PN Sounder Measurements using a Mobile 32 Element Receive Array and a Simulated Single-Antenna Microcellular Base Station in Downtown Ottawa,” North American Radio Science Meeting URSI (Ottawa, Canada), July 2007.

C73  Abdulaziz Barnawi and R.H.M Hafez, “An Adaptive MAC Protocol for Infrastructure Wireless Sensor Networks". SENSORCOMM 2007, International Conference on Sensor Technologies and Applications,  Spain, Oct. 2007.

C72  M. Rudner, A.O. Abdel Halim and R.H.M. Hafez: “Critical Energy Infrastructure Protection in the Arab Gulf using Multiple Technological Platforms”41th annual  41st Annual 2007 IEEE International Carnahan Conference on Security Technology, Ottawa, Ontario Canada, October 8-11th, 2007.

C71  R.C.J.Bultitude, M. Han, N.V. Adnani, and R.H.M. Hafez, "Comparison of Expected Performance on B3G Spread Spectrum Mobile Radio Links at 1.9 and 5.8 GHz Based on Propagation Measurements"  VTC2006Fall, Montreal, Canada, Dec 2006.

C70  H. Zhu, and R.H.M. Hafez, "Novel Scheduling Algorithm for Multimedia Service in OFDM Broadband Wireless Systems" ICC2006, Jun 2006.

C69  N.H.Dawod, I.D. Marsland, and R.H.M. hafez, "A Multiuser Zero-Forcing System with Reduced Near-Far Problem and MIMO Channel Correlations"  CCECE06, May 2006.

C68  N.H. Dawod, R.H.M. Hafez and I. Marsland, "Multicarrier SDMA System with Reduced Intra-user Cross-correlations" IEEE, MC-SS 2005, Oberpfaffenhofen, Germany, Sept  2005.

C67  N. Dawod, R.H.M. Hafez, and I. Marsland, "Uplink MIMO-OFDM in Widely Spaced Antenna Array"  Proc. of the 18th Annual Canadian Conf. on Electrical and Computer Engineering (CCECE05), Saskatoon, Canada, May 2005. 

C66  N.H. Dawod, R.H.M. Hafez and I. Marsland, “Performance of widely spaced antenna arrays in correlated-Ricean MIMO-OFDM channels" in the proc. of 6th World Wireless Congress, WWC'2005, San Francisco, USA, May, 2005.

C65  M. Mashhouri, R.H.M. Hafez, and I. Lambadaris, "Measured Performance of Point-to-Point 802.11a," Proc. of the Wireless and Optical Comm. Networks (WOCN 2005), Dubai, UAE, Mar 2005.

C64  I. Haroun, R.H.M. Hafez, G. Chan and W. Wong, “Millimetre-Wave Bands for Indoor Broadband Wireless Systems”, the 12th Wireless World Research Forum (WWRF12), Toronto, Canada, Nov 2004.

C63  N. Dawod, R.H.M. Hafez, I. Marsland: “Performance of MIMO-OFDM in widely spaced antenna arrays”, Wireless04, Calgary, July 2004.

C62  X. Li and R.H.M. Hafez, “Power-aware Localized Routing in Hybrid Ad-Hoc/Infrastructure Wireless Networks”, Ad-Hoc-Now 2004, Vancouver, July 2004.

C61  Haroun, I., Gouin, F., R.H.M. Hafez, “Experimental Study of WLAN 802.11b Over Optical Fiber”, European Microwave Conf., Munich, Germany, October. 2003.

C60  N.V. Adnani, R.H.M.Hafez and R.Bultitude, “The Effect of Channel Estimation Errors on Rake Receiver Performance in WCDMA Systems”, IEE 3G Conf. UK, July 2003.

C59  Haroun, I., Chan, G.,  R.H.M. Hafez, et al., “Feasibility Study of Radio Over Optical Transmission Systems for Increased Spectrum Efficiency”, The IEEE International Symposium on EMC, Istanbul, Turkey, May, 2003.

C58  I. Haroun, G. Chan, R.H.M. Hafez, L. Bouchard, and L. Boucher “Feasibility Study of Radio Over Optical Transmission Systems for Increased System Efficiency”, the IEEE Int. Symposium on Electromagnetic Compatibility, Istanbul, Turkey, May 2003.

C57  A. Gaddah, M. El-Shentenawy, T. Kunz, and R.H.M. Hafez, "Image transcoding proxy for mobile Internet access", in Proc. of the IEEE Semi-annual Vehicular Technology Conf., Vancouver, BC, Canada, Vol. 2, pp. 807-811, Sept. 2002

C56  N. V. Adnani, R. J. C. Bultitude, R. H. M.Hafez, “Rake receiver performance on fading Multipath channels in W-CDMA systems” IASTED Intl. Conf. Wireless and Optical Comm. pp. 228-232, 2002.

C55  M. El Shentenawy, A. Gaddah, Q. Guo, T. Kunz and R. Hafez, "Image transcoding for proxy Internet wireless access", Proc. of the 12th Int. Conf. on Wireless Comm., Calgary, Canada, pp. 542-552, July 2000.

C54  P.R.Larijani, R.H.Hafez and I.Lambadaris, "Two level access control strategy for multimedia CDMA network " ICC98, Altlanta, Georgia , June 1998.

C53  G.R. Rajugopal and R.H.M. Hafez, "Robust Video Communications over Wireless Packet network", IEEE-ICIP' 97, Santa Barbra, USA, October 1997.

C52  P.R. Larijani, R.H.M.Hafez and I. Lambadaris, "Adaptive Access Control for Multimedia Traffic in CDMA Cell with Imperfect Power Control". 8th IEEE Int. Symp. on Personal, Indoor and Mobile Communications, PIMRC'97", Helsinky. Finland, Sept. 1997.

C51  R.H.M. Hafez and G. Chan, "Measures of Spectrum Utilization", Special session on  spectrum management. 1997 IEEE AP-S Int. Symp. and URSI North American Radio Science Meeting. Montreal. Canada. July 1997.

C50  P.R. Larijani, R.H.M. Hafez and I. Lambadaris, "Joint Access Control and User Removal in Multimedia CDMA Cell", Phoenix AZ, Globecom 1997.

C49  G.R. Rajugopal, R.H.M. Hafez and S.A. Mahmoud, "Robust Zero-Tree Coding for Video Communications Over Mobile Networks", IEE-ICPMSC' 96, Hong Kong, Dec. 1996.

C48  G.R. Rajugopal, S.A. Mahmoud and R.H.M. Hafez, "Multi-resolution Motion Estimation at Low Bit Rate", IEEE-TENCON' 96, Perth, Australia, Nov. 1996.

C47  N. Movahhedinia, G. Stamatelos and R.H.M. Hafez, "Non-Uniform Polling and Reservation Alternatives for Bandwidth Management in Broadband Wireless Networks", IEEE GLOBECOM'96, London, England, Nov. 1996.

C46  P.R. Larijani, R.H.M.Hafez and N. Movahedinia, "Admission control for multimedia CDMA". Wireless'96.  Calgary. Canada, July 1996. 

C45  N. Movahhedinia, G. Stamatelos and R.H.M. Hafez, "Time Slots Assignment Strategies for Indoor Broadband Wireless Systems", GLOBECOM '95, pp 327-331, 1995.

C44  F. Hendessi, A.U.H. Sheikh and R.H.M. Hafez, "Capacity Improvement of Microcellular Systems Using Signal Cyclic Spectral Properties", The sixth Int. Conf. on Personal, Indoor and Mobile Radio Communications (PIMRC'95), Sep. 1995.

C43  N. Movahhedinia, G. Stamatelos and R.H.M. Hafez, "Polling-based Multiple Access for Indoor Broadband Wireless Systems", the sixth Int. Conf. on Personal, Indoor and Mobile Radio Comm. (PIMRC'95), Sep. 1995.

C42  M.S. El-Tanany, R.H.M. Hafez and G. Chan, "Inter-system Interference Modeling for Land Mobile Systems", Canadian Conf. on Elec. and Computer Eng. Sep. 1995.

C41  S. Arcand, K.M.S. Murthy and R.H.M. Hafez, "Load Sharing Algorithms for Hybrid Mobile Networks", International Mobile Satellite Conference (IMS'95). June 1995.

C40  D.Yu, D.D. Falconer and R.H.M. Hafez, "Interference Characteristics of TDMA In-building Wireless Systems", ICUPC'94, San Diego. USA. Sep. 1994.

C39  G. Boudreaux and R.H.M. Hafez, "Range Prediction for Indoor Wireless Systems", Wireless '94 , Calgary, AB, Canada, July, 1994.

C38  D. Yu, D.D. Falconer and R.H.M. Hafez, "Traffic Capacity Studies of TDMA In-building Wireless Systems", ICUPC'93 , Ottawa, ON, Canada, October p. 696. 1993.

C37  V.R.M. Thyagarajan, R.H.M. Hafez and D.D. Falconer, "Broadband Indoor Wireless Communications in the (20-60) GHz Band: Signal Strength Considerations", ICUPC'93 , Ottawa, ON, Canada, October, pp. 894-899, 1993.

C36  R.A. Goubran, R.H.M. Hafez and A.W. Lawrence, "Digital Signal Processing Applications in IMS", Int. Symp. on Ion Mobility Spectrometry , Quebec City, QC, Canada, August, 1993.

C35  R.H.M. Hafez, D.D. Falconer, G Stamatelos and S.A. Mahmoud, "Fundamental Issues in Indoor Millimeter Wave Systems", Wireless '93 , Calgary, Canada, July, 1993. 

C34  F. Hendessi, R.H.M. Hafez and A.U.H. Sheikh, "The Structure and Performance of FRESH-Decision Feedback Equalizers in the Presence of Adjacent Channel Interference", Proc. of the 1993 Vehicular Technology Conf. , May, 1993.

C33  K. Islam, R.H.M. Hafez and D.C. Coll, "Cyclic Spectral Analysis of Direct Sequence Spread Spectrum Signals", Proc. of the 1993 Vehicular Technology Conf. , May, 1993.

C32  F. Hendessi, R.H.M. Hafez and A.U.H. Sheikh, "The Structure and Performance of FRESH-Decision Feedback Equalizers in the Presence of Adjacent Channel Interference", Proc. of the 1993 Vehicular Technology Conf. , May, 1993.

C31  V.R.M. Thyagarajan and R.H.M. Hafez, "Traffic Study of TDMA/TDD in Millimetre Wave Indoor Wireless Communications", Proc. of the 3rd Intern. Symposium. on Personal Indoor Wireless Comm. , Boston, MA, U.S.A., October, 1992.

C30  N.W.K. Lo and R.H.M. Hafez, "Neural Networks Channel Equalization", Proc. of the IJCNN'92 , Baltimore, MD, U.S.A., June, 1992.

C29  J.P. DeCruyenaere and R.H.M. Hafez, "A Comparison Between Kalman Filters and Re-Current Neural Networks", Proc. of the IJCNN'92 , Baltimore, MD, U.S.A., June, 1992.

C28  S. Golenstaneh, R.H.M. Hafez and S.A. Mahmoud, "Adjacent Channel Interference Reduction Using Decision Feedback Equalizers", Proc. of the 16th Biennial Symp. on Comm. , Kingston, May, 1992.

C27  A.W. Lawrence, R.A. Goubran and R.H.M. Hafez, "Signal Improvement in Ion Mobility Spectrometry", SPIE - The Int. Society for Optical Engineering, Symp. on Application of Signal and Image Processing in Explosive Detection Systems ,Boston, MA, U.S.A., SPIE Vol. 1824, pp. 97-108,  May, 1992.

C26  R.H.M.Hafez and G.Nehme, "The Capacity of a Single Channel Slotted ALOHA in a multipath Cellular Radio System" Proc. of the Canadian Conference on Electrical and Computer Engineering. Quebec city, Quebec, p.33.4, 1991.

C25  R.H.M.Hafez and G.Chan, "Interference Reduction using Neural Networks", Proc. of CCEC, p. 33.4, 1991.

C24  L.L.Lipoth, R.H.M.Hafez and R.A.Goubran,"ERG Based Classification of Eye Diseases using Neural Networks", 13th Inter. Conf. of the IEEE Engineering in Medicine and Biology Society, 1991.

C23  R.Hebert, R.A.Goubran and R.H.M.Hafez, "Analysis of Background Acoustic Noise in Cars", Canadian Conf. on Electrical and Computer Engineering, Ottawa, pp. 21.4.1-21.4.5, September 1990.

C22  R.A.Goubran, R.Hebert and R.H.M.Hafez, "Acoustic Noise Suppression using Regressive Adaptive Filtering", Proc. of the 40th IEEE Vehicular technology Conf., Orlando, Florida, pp.48-53, May 1990.

C21  L.Boucher and R.H.M.Hafez, "Evaluation of VHF FM, SSB and ACSSB Radio Systems in the Interference Context of the Land Mobile Bands", Proc. of the 40th IEEE Vehicular Technology Conf., May 1990.

C20  E.N.Hum, A.U.H.Sheikh and R.H.M.Hafez, "Performance Evaluation of Burst Trapping Codes for Land Mobile Radio Channels", DMR IV, Oslo, Norway, 1990.

C19  R.H.M.Hafez and R.A.Goubran, "The Switched Tone Concept for Speech and Data Transmission over Land Mobile Channels", Proceedings of the 37th IEEE Vehicular Technology Conference, Tampa, Florida, pp. 532-540, June 1987.

C18  R.A.Goubran, H.M.Hafez and A.B.Kerr, "Adaptive Speech Companding for Speech Transmission over Mobile Channels", Proc. of the 37th IEEE Vehicular Technology Conf., Tampa, Florida, pp.13-18, June 1987.

C17  R.A.Goubran and R.H.M.Hafez, "Background Acoustic Noise Reduction in Mobile Telephony", Proc. of the 36th IEEE Vehicular Technology Conf., Dallas, Texas, pp.72-76, May 1986.

C16  R.A.Goubran, H.M.Hafez and A.U.H.Sheikh, "A Real-Time Programmable Mobile Channel Simulator", Proc. of the 36th IEEE Vehicular Technology Conf., Dallas, Texas, pp. 215-218, May 1986.

C15  A.U.H.Sheikh and R.H.M.Hafez, "Digital Transmission over Mobile Channels: Measurements and Evaluations", Proc. of the 36th IEEE Vehicular Technology Conf., Dallas, Texas, pp. 46-51, May 1986.

C14  N.Nguyen, A.U.H.Sheikh and R.H.M.Hafez, "Access Strategies for D-TASI Over Mobile Radio Channels", Proc. of the 36th IEEE Vehicular Technology Conf., Dallas, Texas, pp. 311-318 May 1986.

C13  R.H.M.Hafez, J.S.Riordon and S.Aidarous, "Packet Switching in Cellular Radio Systems", 1985 North American radio Science Meeting, Vancouver, June 1985.

C12  T.Knight and R.H.M.Hafez, "Experimental Study of the Covariance Function of the Fading Signal Envelope in the 800 MHz Band", 1985 North American Radio Science meeting, Vancouver, June 1985.

C11  A.U.H.Sheikh, J.S.Riordon, R.H.M.Hafez and M.Tobis, "Demand Time Assigned Speech Interpolation for Land Mobile Systems", Proc. of the Int. Conf. on Mobile Radio Systems and Techniques, York, U.K., pp.150-154, September 1984.

C10  J.K.Cavers, R.H.M.Hafez and S.A Mahmoud, "Design Considerations in the MSAT Mobile Telephone System Set-up Channel", Proceedings of the IEEE Vehicular Technology Conference, May 1984.

C9    R.H.M.Hafez, S.Towaij, P.Constantinou, W.Burchill and A.U.H.Sheikh, "Digital Data Transmission over Land Mobile Channels", Proc. of the IEEE Vehicular Technology Conf., pp.261-264, May 1983.

C8    M.El-Tanany, R.H.M.Hafez and J.S.Whight, "Optimization of a Quadrature Coherent Receiver for Partial Response, Continuous Phase Modulation with Modulation Index 1/2", Proc. of GLOBECOM'82, Miami, Florida, November 1982.

C7    A.K.El-Hakeem and R.H.M.Hafez, "Optimal Codes and Filters for Hard-Limited OQPSK/DS Multiple Access Systems", Proc. of MILCOM'82 Conf., Boston, Massachusetts, October 1982.

C6    M.El-Tanany, R.H.M.Hafez and J.S.Whight, "A Fast Carrier Recovery Loop for CPFSK Signals", National Aerospace and Electronics Conf., NAECON'81, Dayton, Ohio, May 1981.

C5    R.H.M.Hafez and J.DaSilva, "Land Mobile Radio Systems: Some Novel results", MECOM'81 Conf., Bahrain, February 1981.

C4    R.H.M.Hafez and J.S.DaSilva, "Comparative Study of Digital Modulation Techniques for Land Mobile Data Channels", Proceedings of the Canadian Communications and Power Conference, Montreal, October 1980.

C3    J.S.DaSilva, R.H.M.Hafez and S.A.Mahmoud, "Optimal Packet Size for Fading land Mobile Data Channels", proc. of ICC Conf., Seattle, June 1980.

C2    R.H.M.Hafez, J.deMercado and J.DaSilva, "Packet Error Rate for Fading land Mobile Data Channels", Proc. of The IntelCom Conf., Rio de Janeiro, May 1980.

C1    J.S.DaSilva and R.H.M.hafez, "Traffic Analysis of New architectures for Voice/Data Land Mobile Systems", Proc. of The InteCom Conf., Rio de Janeiro, May 1980.