Profile
College / Department
Teaching areas
Electric circuits, Electronics, Radiofrequency (RF) circuits and systems, Microwave techniques, RF and Microwave instrumentation and measurements, Satellite communications, Engineering design.
Research areas
Wireless transceivers design, 5G RF circuits and systems, Power amplifiers design, characterization and linearization, digital predistortion techniques, satellite transmitters, Impairements compensation for wireless and satellite systems.
Education
MSc, Ecole Polytechnique Montreal, Canada, 2004
BS, Ecole National d'Ingenieurs de Tunis (ENIT), Tunisia, 2001
PhD, University of Calgary, Canada, 2008
Professional experience
American University of Sharjah, UAE, 2015-Present
University of Calgary, AB, Canada, 2015-Present
King Fahd University of Petroleum and Minerals, KSA, 2010-2015
Memberships
Institute of Electrical and Electronics Engineers (IEEE)
Contact
ohammi@aus.edu
+971 6 515 2971
Dr. Oualid Hammi
Associate Professor
PhD, University of Calgary, Canada, 2008
Oualid Hammi taught electrical engineering for more than five years at King Fahd University of Petroleum and Minerals, Saudi Arabia. He also taught as an adjunct professor with the Electrical and Computer Engineering Department at the University of Calgary, Canada. His areas of research and teaching interests are in the broad area of radiofrequency and microwave electronics with an emphasis on energy efficient linear transmitters design for wireless applications. He serves as regular reviewer for several IEEE journals.
Publications
F. M. Ghannouchi, O. Hammi, and M. Helaoui, “Behavioral Modeling and Predistortion of Wideband Wireless Transmitters”, John Wiley & Sons, Chichester, UK, Jul. 2015, ISBN: 978-1-118-40627-4. (complementary software material available at www.wiley.com/go/Ghannouchi/Behavioral)
F. M. Ghannouchi O. Hammi, and M. Helaoui, “Digital Predistortion for Microwave Transmitters”, Invited Chapter for the Wiley Encyclopaedia of Electrical and Electronics Engineering, published online 16 Sep. 2014, DOI: 10.1002/047134608X.W8224.
S. Bensmida, O. Hammi, A. Kwan, M. S. Sharawi, K. A. Morris, and F. M. Ghannouchi, “Extending the characterization bandwidth of dynamic nonlinear transmitters with application to digital predistortion,” IEEE Trans. Microw. Theory Tech., vol. 64, no. 8, pp. 2640–2651, Aug. 2016.
A. Abdelhafiz, L. Behjat, F. M. Ghannouchi, M. Helaoui, and O. Hammi, “A high-performance complexity reduced behavioural model and digital predistorter for MIMO systems with crosstalk,” IEEE Trans. Commun., vol. 64, no. 5, pp. 1996–2004, May 2016.
O. Hammi, M. O. Khalifa, A. Abdelhafiz, A. Kwan, A. Zerguine, M. S. Sharawi, and F. M. Ghannouchi, “A dual-input two-box model for behavioral modeling and predistortion of envelope tracking power amplifiers,” IEEE Microw. Wireless Compon. Lett., vol. 26, no. 5, pp. 361–363, May 2016.
S. K. Dhar, M. S. Sharawi, O. Hammi, and F. M. Ghannouchi, “An active integrated ultra-wideband MIMO antenna,” IEEE Trans. Antennas Propag., vol. 64, no. 4, pp. 1573–1578, Apr. 2016.
A. I. Abdul-Rahman, O. Hammi, A. Kwan, A. Zerguine, and F. M. Ghannouchi, “A novel weighted memory polynomial for behavioral modeling and digital predistortion of nonlinear wireless transmitters,” IEEE Trans. Ind. Electron., vol. 63, no. 3, pp. 1745–1753, Mar. 2016.
O. Hammi, “Efficient linear amplification using digitally predistorted overdriven power amplifiers,” IEEE Trans. Broadcast., vol. 61, no. 3, pp. 398–406, Sep. 2015.
A. K. Kwan, M. Younes, F. M. Ghannouchi, S. Zhang, W. Chen, R. Darraji, M. Helaoui, and O. Hammi, “Concurrent multi-band envelope modulated power amplifier linearized using extended phase-aligned DPD,” IEEE Trans. Microw. Theory Tech., vol. 62, no. 12, pp. 3298–3308, Dec. 2014.
O. Hammi, A. Kwan, S. Bensmida, K. A. Morris, and F. M. Ghannouchi, “A digital predistortion system with extended correction bandwidth with application to LTE-A nonlinear power amplifiers,” IEEE Trans. Circuits Syst. I, Reg. Papers, vol. 61, no. 12, pp. 3487–3495, Dec. 2014.
A. H. Abdelhafiz, A. Kwan, O. Hammi, and F. M. Ghannouchi, “Digital predistortion of LTE-A power amplifiers using compressed sampling based unstructured pruning of Volterra series,” IEEE Trans. Microw. Theory Tech., vol. 62, no. 11, pp. 2583–2593, Nov. 2014.
A. Ali, O. Hammi, and T. Y. Al-Naffouri, “Compressed sensing based joint-compensation of power amplifier's distortions in OFDMA cognitive radio systems,” IEEE Journal on Emerging and Selected Topics in Circuits and Systems (IEEE JETCAS) Special Issue on "Advanced Circuits and Systems for CR/SDR Applications", vol. 3, no. 4, pp. 508–520, Dec. 2013.
A. H. Abdelhafiz, O. Hammi, A. Zerguine, A. T. Al-Awami, and F. M. Ghannouchi, “A PSO based memory polynomial predistorter with embedded dimension estimation,” IEEE Trans. Broadcast., vol. 59, no. 4, pp. 665–673, Dec. 2013.
O. Hammi, A. Kwan, and F. M. Ghannouchi, “Bandwidth and power scalable digital predistorter for RF power amplifiers,” IEEE Trans. Broadcast., vol. 59, no. 3, pp. 520–527, Sep. 2013.
M. Younes, O. Hammi, A. Kwan, and F. M. Ghannouchi, “An accurate complexity-reduced “PLUME” model for behavioral modeling and digital predistortion of RF power amplifiers,” IEEE Trans. Ind. Electron., vol. 58, no. 4, pp. 1397–1405, Apr. 2011.
O. Hammi, M. Younes, and F. M. Ghannouchi, “Metrics and methods for benchmarking of RF transmitter behavioral models with application to the development of a novel hybrid memory polynomial model,” IEEE Trans. Broadcast., vol. 56, no. 3, pp. 350–357, Sep. 2010.
F. M. Ghannouchi and O. Hammi, “Behavioral modeling and predistortion,” IEEE Microw. Mag., vol. 10, no. 7, pp. 52–64, Dec. 2009.
S. C. Jung, O. Hammi, and F. M. Ghannouchi, “Design optimization and DPD linearization of GaN based unsymmetrical Doherty power amplifiers for 3G multi-carrier applications,” IEEE Trans. Microw. Theory Tech., Vol. 57, no. 9, pp. 2105–2113, Sep. 2009.
O. Hammi and F. M. Ghannouchi, “Twin nonlinear two-box models for power amplifiers and transmitters exhibiting memory effects with application to digital predistortion,” IEEE Microw. Wireless Compon. Lett., Vol. 19, no. 8, pp. 530–532, Aug. 2009.
O. Hammi and F. M. Ghannouchi, “Power alignment of digital predistorters for power amplifiers linearity optimization,” IEEE Trans. Broadcast., vol. 55, no. 1, pp. 109–114, Mar. 2009.
O. Hammi, S. Carichner, B. Vassilakis, and F. M. Ghannouchi, “Power amplifiers’ model assessment and memory effects intensity quantification using memoryless post-compensation technique,” IEEE Trans. Microw. Theory Tech., vol. 56, no. 12, part: 2, pp. 3170–3179, Dec. 2008.
O. Hammi, S. Carichner, B. Vassilakis, and F. M. Ghannouchi, “Synergetic crest factor reduction and baseband digital predistortion for adaptive 3G Doherty power amplifier linearizer design,” IEEE Trans. Microw. Theory Tech., vol. 56, no. 11, part: 2, pp. 2602–2608, Nov. 2008.
O. Hammi, F. M. Ghannouchi, and B. Vassilakis, “A compact envelope-memory polynomial for RF transmitters modeling with application to baseband and RF-digital predistortion,” IEEE Microw. Wireless Compon. Lett., vol. 18, no. 5, pp. 359–361, May. 2008.
Conference Presentations
A. K. Kwan, M. Younes, O. Hammi, A. Abdelhafiz, F. M. Ghannouchi, and A. O. Fapojuwo, “A multi-stage concurrent dual-band DPD architecture for closely spaced carriers using a low bandwidth feedback loop,” IEEE International Microwave Symposium (IMS2016), San Francisco, CA, pp. 1–4, 22-27 May 2016.
O. Hammi, A.E. Abdelrahman, and A. Zerguine, “Multi-basis weighted memory polynomial for RF power amplifiers behavioral modeling,” IEEE International Wireless Symposium (IWS2016), Shanghai, China, pp. 1–4, 14-16Mar. 2016.
S. Najmeddine, and O. Hammi, “Novel single-input single-output two-box polar behavioral model for envelope tracking power amplifiers,” IEEE 58th International Midwest Symposium on Circuits and Systems (MWSCAS 2015), Fort Collins, CO, pp. 1–4, 2-5 Aug. 2015.
M. Hanzala, M. S. Sharawi, and O. Hammi, “Accurate estimation of memory polynomial model dimension for dynamic nonlinear RF power amplifiers,” 10th IEEE Conference on Industrial Electronics and Applications (ICIEA2015), Auckland, New Zealand, pp. 145–150, 15-17 Jun. 2015.
A. Abdelhafiz, O. Hammi, and F. M. Ghannouchi “A lattice-based memory polynomial behavioral model for nonlinear MIMO transmitters using fixed point arithmetic,” IEEE International Microwave Symposium (IMS2015), Phoenix, AZ, pp. 1–4, 17-22 May 2015.
M. O. H. Khalifa, A. Abdelhafiz, A. Kwan, F. M. Ghannouchi, and O. Hammi, “Behavioral modeling of envelope tracking power amplifier using Volterra series model and compressed sampling,” IEEE International Wireless Symposium (IWS2015), Shenzhen, China, pp. 1–4, 30 Mar.-1 Apr. 2015.
A. Abdelhafiz, M. Younes, A. Kwan, O. Hammi, F. M. Ghannouchi, and N. Boulejfen, “A comparative study of wideband and dual-band digital predistortion architectures,” IEEE International Wireless Symposium (IWS2015), Shenzhen, China, pp. 1–4, 30 Mar.-1 Apr. 2015.
Awards and Honors
Faculty Research Grant, American University of Sharjah, 2016
National Science, Technology & Innovation Plan (NSTIP), King AbdulAziz City for Science and Technology, 2012, 2013, 2014, 2015
Internal Research Grant, King Fahd University of Petroleum and Minerals, 2010, 2011, 2012, 2013, 2014, 2015
Other creative/research
A. E. Abdul-Rahman, O. Hammi, and A. Zerguine, “Weighted memory polynomial method and system for power amplifiers predistortion”: US 9,461,597 B2; October 4, 2016. Patent granted by the U.S. Patent and Trademark Office (USPTO).
O. Hammi, “Augmented twin-nonlinear two-box models for power amplifiers modeling and predistortion”: US 9,337,781 B2; May 10, 2016. Patent granted by the U.S. Patent and Trademark Office (USPTO).
O. Hammi, “Scalable digital predistortion system,” US 9,214,969 B2; December 15, 2015. Patent granted by the U.S. Patent and Trademark Office (USPTO).
O. Hammi, “Digital predistortion system and method with extended correction bandwidth,” US 9,172,334 B2; October 27, 2015. Patent granted by the U.S. Patent and Trademark Office (USPTO).
A. H. Abdelhafiz, O. Hammi, A. Zerguine, and A. T. Al-Awami, “Memory polynomial based digital predistorter,” US 9,160,280 B1; October 13, 2015. Patent granted by the U.S. Patent and Trademark Office (USPTO).
A. Ali, D.S. Owodunni, O. Hammi, and T. Al-Naffouri, “Joint compensation of power amplifier's distortions,” US 9,137,082 B1; September 15, 2015. Patent granted by the U.S. Patent and Trademark Office (USPTO).
O. Hammi, “Method for memory effects quantification and comparison in RF transmitters and amplifiers,” US 8,897,728 B2; November 25, 2014. Patent granted by the U.S. Patent and Trademark Office (USPTO).
