 

My Publications 
"Publish or perish!" 
(last update: Feb. 27th, 2016) 

Journal Papers
Conference Papers 

Books and Chapters 

F. M. Ghannouchi,
O. Hammi, and M. Helaoui, “Behavioral Modeling and
Predistortion of Wideband Wireless Transmitters”, John Wiley & Sons,
Chichester, UK, Jun. 2015, ISBN: 9781118406274.

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.


Software 

F. M. Ghannouchi O. Hammi, A. Kwan, M. Helaoui, and T.
Liu, “AMPS: Amplifiers Modeling and Predistortion Software”,
commercialization pursued through Innovate Calgary. A free trial
version is available at
http://flintbox.com/public/project/23005
.


Patents 

O. Hammi, and S. Najmeddine, “Twobox polar model for
transmitters' dynamic nonlinear distortions modeling and mitigation”: patent filed with the U.S. Patent and Trademark Office (USPTO)
through KFUPM Intellectual Assets Office on February 22, 2016.
Patent pending US15/050,424.

O. Hammi, and M. O. H. Khalifa, “System level oriented
loadpull based design of envelope tracking power amplifiers”: patent filed with the U.S. Patent and Trademark Office (USPTO)
through KFUPM Intellectual Assets Office on November 24, 2015.
Patent pending US14/951,470.

A. I. AbdulRahman,
O. Hammi, and A. Zerguine, “A novel weighted memory
polynomial for LTE base stations power amplifiers behavioural
modelling”: patent filed with the U.S. Patent and Trademark Office (USPTO)
through KFUPM Intellectual Assets Office on November 10, 2014.
Patent pending US14/537,843.

O. Hammi,
“Augmented twinnonlinear twobox models for power amplifiers
modeling and predistortion”: patent filed with the U.S. Patent and
Trademark Office (USPTO) through KFUPM Intellectual Assets Office on
December 9, 2013. Patent pending 14/101,256.

O. Hammi, “Scalable digital predistortion system,”
US9,214,969 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,” US9,172,334 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. AlAwami, “Memory
polynomial based digital predistorter,” US9,160,280 B1;
October 13, 2015. Patent granted by the U.S. Patent and Trademark
Office (USPTO).

A. Ali, D.S. Owodunni,
O. Hammi, and T. AlNaffouri, “Joint compensation of
power amplifier's distortions,” US9,137,082 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,” US8,897,728 B2;
November 25, 2014. Patent granted by the U.S. Patent and Trademark
Office (USPTO).


Journal Papers 

M. S. Sharawi, S. K. Dhar,
O. Hammi,
and F. M. Ghannouchi,
“AMiniaturized active integrated antennas: A codesign approach,”
IET
Microw. Antennas Propag.,
(accepted).

O. Hammi,
M. O. Khalifa, A. Abdelhafiz, A. Kwan, A. Zerguine, M. S. Sharawi,
and F. M. Ghannouchi, “A dualinput twobox model for behavioral
modeling and predistortion of envelope tracking power amplifiers,”
IEEE Microw. Wireless Compon. Lett.,
(accepted).

M. S. Sharawi, S. K. Dhar,
O. Hammi,
and F. M. Ghannouchi,
“An active integrated ultrawideband MIMO antenna,”
IEEE Trans.
Antennas Propag.,
(accepted).

A. I. AbduRahman, 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,
M. H. Khan, A. Abdelhafiz, F. M. Ghannouchi, and M. S. Sharawi,
“Complexity reduced behavioral modeling of dynamic nonlinear power
amplifiers using twobox structures,”
Wiley Microw. Opt. Technol. Lett.,
vol. 58, no. 3, pp. 726–731,
Mar. 2016.

O. Hammi, and
A. Miftah, “ComplexityawareNMSE “CAN” metric for dimension
estimation of memory polynomial based power amplifiers behavioral
models,” IET Commun., vol. 9, no. 18, pp. 2227–2233, Dec.
2015.

O. Hammi,
“Efficient linear amplification using digitally predistorted
overdriven power amplifiers,” IEEE Trans. Broadcast.,
vol. 61, no. 3, pp. 398–406, Sep. 2015.

A. Seregin, O.
Hammi, D. Wang, M. Helaoui, and F. M. Ghannouchi, “Modified
linear prediction algorithm for narrow band interference suppression
in Universal Mobile Telecommunication System,” Wireless
Communications and Mobile Computing, vol. 15, no. 1, pp.
147–154, Jan. 2015.

A. K. Kwan, M. Younes, F.
M. Ghannouchi, S. Zhang, W. Chen, R. Darraji, M. Helaoui, and
O. Hammi, “Concurrent multiband envelope modulated power
amplifier linearized using extended phasealigned 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 LTEA nonlinear power amplifiers,” IEEE Trans.
Circuits Syst. I, Reg. Papers, vol. 61, no. 12, pp. 3487–3495,
Dec. 2014.

A. H. Abdelhafiz, A.
Zerguine, O. Hammi, and F. M. Ghannouchi, “A
latticebased memory polynomial predistorter for wideband RF power
amplifiers,” IET Commun., vol. 8, no. 17, pp. 3122–3127, Nov.
2014.

A. H. Abdelhafiz, A.
Kwan, O. Hammi, and F. M. Ghannouchi, “Digital
predistortion of LTEA 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.

O. Hammi,
“Asymmetry index for memory effects quantification in wireless
transmitters and power amplifiers driven by broadband modulated
signals,” Springer The Arabian Journal for Science and
Engineering, vol. 39, no. 5, pp. 4013–4021, Apr. 2014.

D. S. Owodunni, A. Ali,
A. A. Quadeer, E. B. AlSafadi, O. Hammi, and T. Y.
AlNaffouri, “Compressed sensing techniques for receiver based
postcompensation of transmitter’s nonlinear distortions in OFDM
systems,” Elsevier Signal Processing Journal, vol. 97, pp.
282–293, Apr. 2014.

O. Hammi,
“Augmented twinnonlinear twobox behavioral models for
multicarrier LTE power amplifier,” Hindawi The Scientific World
Journal  Subject Area: Communications, vol. 2014, Article ID
762534, 7 pages, 2014. doi:10.1155/2014/762534.

A. Ali, O. Hammi,
and T. Y. AlNaffouri, “Compressed sensing based jointcompensation
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. AlAwami, 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.

A. Kwan, F. M. Ghannouchi,
O. Hammi, M. Helaoui, and M. R. Smith, “Lookup
tablebased digital predistorter implementation for field
programmable gate arrays using longterm evolution signals with
60MHz bandwidths,” IET Science Measurements & Technology,
vol. 6, no. 3, pp. 181–188, May 2012.

R. Darraji, F. M.
Ghannouchi, and O. Hammi, “Generic loadpull based
design methodology for performance optimization of energyefficient
Doherty amplifiers,” IET Science Measurements & Technology,
vol. 6, no. 3, pp. 132–138, May 2012.

F. M. Ghannouchi, F.
Taringou, A. Kwan, O. Hammi, and R. Malhame,
“Identification of truestatic predistorter using a sine wave and
accurate quantification of memory effects in broadband wireless
transmitters,” IET Communications, vol. 5, no. 9, pp.
1268–1274, Jul. 2011.

R. Darraji, F. M.
Ghannouchi, and O. Hammi, “A dualinput digitally
driven Doherty amplifier architecture for performance enhancement of
Doherty transmitters,” IEEE Trans. Microw. Theory Tech., vol.
59, no. 5, pp. 1284–1293, May. 2011.

M. Younes, O. Hammi,
A. Kwan, and F. M. Ghannouchi, “An accurate complexityreduced
“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.

S. SaiedBouajina,
O. Hammi, M. JaidaneSaidane, and F. M. Ghannouchi,
“Experimental approach for robust identification of RF power
amplifier behavioral models using polynomial structures,” IET
Microwaves, Antennas and Propagation, vol. 4, no. 11, pp.
1818–1828, Nov. 2010.

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. Taringou, O.
Hammi, B. Srinivasan, R. Malhame, and F. M. Ghannouchi,
“Behavior modelling of wideband RF transmitters using
HammersteinWiener models,” IET Circuits, Devices and Systems,
vol. 4, no. 4, pp. 282–290, Jul. 2010.

N. Boulejfen, A. Harguem,
O. Hammi, F. M. Ghannouchi, and A. Gharsallah,
“Analytical prediction of spectral regrowth and correlated and
uncorrelated distortion in multicarrier wireless transmitters
exhibiting memory effects,” IET Microwaves, Antennas and
Propagation, vol. 4, no. 6, pp. 685–696, Jun. 2010.

O. Hammi,
M. Younes, A. Kwan, M. Smith, and F. M. Ghannouchi,
“Performancedriven dimension estimation of memory polynomial
behavioral models for wireless transmitters and power amplifiers,”
Journal of Progress In Electromagnetics Research (PIER) C,
vol. 12, pp. 173–189, 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 multicarrier applications,” IEEE Trans. Microw. Theory
Tech., Vol. 57, no. 9, pp. 2105–2113, Sep. 2009.

O. Hammi
and F. M. Ghannouchi, “Twin nonlinear twobox 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.

M. Younes, O. Hammi,
and F. M. Ghannouchi, “Algorithm for model dimension estimation of
memory polynomialbased RF transmitters / power amplifiers
behavioral models,” International Journal of Microwave and
Optical Technology, vol. 4, no. 4, pp. 242–247, Jul. 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 postcompensation 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 envelopememory
polynomial for RF transmitters modeling with application to baseband
and RFdigital predistortion,” IEEE Microw. Wireless Compon. Lett.,
vol. 18, no. 5, pp. 359–361, May. 2008.

O. Hammi,
F. M. Ghannouchi and B. Vassilakis, “On the sensitivity of RF
transmitters’ memory polynomial model identification to delay
alignment resolution,” IEEE Microw. Wireless Compon. Lett.,
vol. 18, no. 4, pp. 263–265, Apr. 2008.

S. Boumaiza, M. Helaoui,
O. Hammi, T. Liu, and F. M. Ghannouchi, “Systematic
and adaptive characterization approach for behavior modeling of
dynamic nonlinear transmitters,” IEEE Trans. Instrum. Meas.,
vol. 56, no. 6, pp. 2203–2211, Dec. 2007.

O. Hammi,
F. M. Ghannouchi, S. Boumaiza, and B. Vassilakis, “A databased
nested LUT model for RF power amplifiers exhibiting memory effects,”
IEEE Microw. Wireless Compon. Lett., vol. 17, no. 10, pp.
712–714, Oct. 2007.

O. Hammi,
S. Boumaiza and F. M. Ghannouchi, “On the robustness of digital
predistortion function synthesis and average power tracking for
highly nonlinear power amplifiers,” IEEE Trans. Microw. Theory
Tech., vol. 55, no. 6, part: 2, pp. 1382–1389, Jun. 2007.

O. Hammi,
J. Sirois, S. Boumaiza, and F. M. Ghannouchi, “Design and
performance analysis of mismatched Doherty amplifiers using accurate
loadpull based model,” IEEE Trans. Microw. Theory Tech.,
vol. 54, no. 8, pp. 3246–3254, Aug. 2006.

O. Hammi,
S. Boumaiza, M. Jaidane and F. M. Ghannouchi, “Digital subband
filtering predistorter architecture for wireless transmitters,”
IEEE Trans. Microw. Theory Tech., vol. 53, no. 5, pp. 1643–1652,
May 2005.


Conference
Papers 

A. K. Kwan, M. Younes,
O. Hammi, A. Abdelhafiz, F. M. Ghannouchi, and A. O.
Fapojuwo, “A multistage concurrent dualband DPD architecture for
closely spaced carriers using a low bandwidth feedback loop,” IEEE
International Microwave Symposium (IMS2016), San Francisco, CA,
2227 May 2016. (accepted)

O.
Hammi, A. E. Abdelrahman, and A. Zerguine, “Multibasis
weighted memory polynomial for RF power amplifiers behavioral
modeling,”
IEEE
International Wireless Symposium (IWS2016), Shanghai, China, 14
 16 Mar. 2016. (accepted)

O.
Hammi, A. Abdelhafiz, T. Y. AlNaffouri, and F. M.
Ghannouchi, “On
the use of compressed sampling algorithms for impairments
compensation in dynamic nonlinear transmitters,” 15th IEEE
International Symposium on Signal Processing on Signal Processing
and Information Technology (ISSPIT 2015), Abu Dhabi,
United Arab Emirates, pp. 614–618,
710 December 2015.

S. Najmeddine, and O.
Hammi, “Novel
singleinput singleoutput twobox polar behavioral model for
envelope tracking power amplifiers,”
2015 IEEE APS Symposium on Antennas and Propagation (APS 2015),
Vancouver, BC, Canada,
pp. 88–89,
1925 Jul.
2015.

A. Alreshaid, O.
Hammi, M. S. Sharawi, and K. Sarabandi, “A millimeter wave
switched beam planar antenna array,” 2015 IEEE APS Symposium on
Antennas and Propagation (APS 2015), Vancouver, BC, Canada,
pp. 88–89,
1925 Jul. 2015.

M. Hussain, O.
Hammi, M. S. Sharawi, S. Podilchak, and Y. Antar, “A
dielectric resonator based millimeterwave MIMO antenna array for
handheld devices,” 2015 IEEE APS Symposium on Antennas and
Propagation (APS 2015), Vancouver, BC, Canada,
pp. 3–4,
1925 Jul. 2015.

A. Alreshaid, O.
Hammi, M. S. Sharawi, and K. Sarabandi, “'A compact
millimeter wave slot antenna array for 5G standards,” 2015
4th AsiaPacific Conference on Antennas and Propagation (APCAP 2015),
Bali Island, Indonesia, pp. 88–89,
30 Jun.  3 Jul. 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,
1517 Jun.
2015.

A. Abdelhafiz, O.
Hammi, and F. M. Ghannouchi “A latticebased memory
polynomial behavioral model for nonlinear MIMO transmitters using
fixed point arithmetic,” IEEE International Microwave Symposium
(IMS2015), Phoenix, AZ, pp. 1–4, 1722 May 2015.

S. K. Dhar, O.
Hammi, M. S. Sharawi, and F. M. Ghannouchi, “Power amplifier
based integrated and miniaturized active antenna,” 9th European
Conference on Antennas and Propagation (EuCAP 2015), Lisbon,
Portugal, pp. 1–4, 1217 Apr. 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 dualband digital predistortion
architectures,” IEEE International Wireless Symposium (IWS2015),
Shenzhen, China, pp. 1–4, 30 Mar.1 Apr. 2015.

A. Zerguine, O.
Hammi, A. H. Abdelhafiz, and F. M. Ghannouchi, "A
predistorter based on the leastmean squares Newton algorithm,"
2014 International Symposium on Nonlinear Theory and Its
Applications (NOLTA 14),
Luzern, Switzerland, pp. 660–663, 1418 Sep. 2014.

A. Zerguine, O.
Hammi, A. H. Abdelhafiz, M. Helaoui, and F. M. Ghannouchi,
"Behavioral modeling and predistortion of nonlinear power amplifiers
based on adaptive filtering techniques," 11th IEEE International
MultiConference on Systems, Signals, and Devices (SSD 14),
Barcelona, Spain, pp. 1–5, 1114 Feb. 2014.

O. Hammi,
S. Bensmida, and K. Morris, “Behavioral modeling of class J
amplifier driven by 100MHz LTEadvanced signal using dynamic
nonlinearity reduction,” IEEE Topical Meeting on Power Amplifiers
for Wireless and Radio Applications (PAWR 2014), New Port Beach, CA,
pp. 67–69, 1922 Jan. 2014.

A. M. Kedir A. Kwan,
O. Hammi, and F. M. Ghannouchi, “Generic bandwidth
scalable behavioral models for RF power amplifiers with memory
effects,” 2013 IEEE International RF and Microwave Conference (RFM
2013), Penang, Malaysia, pp. 291–294, 911 December 2013.

O. Hammi,
“Quantification of power amplifiers' static and dynamic distortions
using frequency domain metrics,” 2013 IEEE International RF and
Microwave Conference (RFM 2013), Penang, Malaysia, pp. 287–290, 911
December 2013.

O. Hammi,
“Low complexity behavioral model for RF power amplifiers'
nonlinearity and efficiency prediction,” 2013 IEEE International RF
and Microwave Conference (RFM 2013), Penang, Malaysia, pp. 283–286,
911 December 2013.

O. Hammi,
M. S. Sharawi, and F. M. Ghannouchi, “Generalized twinnonlinear
twobox digital predistorter for GaN based LTE Doherty power
amplifiers with strong memory effects,” IEEE International Wireless
Symposium (IWS2013), Beijing, China,
pp. 1–4,
1418 April
2013.

A. B. Numan, O.
Hammi, M. S. Sharawi, and D. N. Aloi, “A printed MIMO
antenna system with CLLs for isolation enhancement,” 7th European
Conference on Antennas and Propagation (EUCAP 2013), Gothenburg,
Sweden,
pp. 1940–1943,
812 April
2013.

S. Deif, O. Hammi,
M. S. Sharawi, and D. N. Aloi, “A Compact Size 12Port
Combiner/Splitter,” IEEE Wireless and Microwave Technology
Conference (WAMICON 2013), Orlando, FL, USA,
pp. 1–3,
79 April
2013.

A. Ibrahim, A. Zerguine
and O. Hammi, “Weighted memory polynomial model for RF
power amplifiers behavioral modeling,” 4th Saudi Students Scientific
Conference, Makkah, Saudi Arabia, April 2013.

A. Ali, O. Hammi,
and T. Y. AlNaffouri, “Compressed sensing based schemes to mitigate
nonlinear distortions in WiMAX physical layer,” 4th Saudi Students
Scientific Conference, Makkah, Saudi Arabia, April 2013.

O. Hammi,
S. C. Jung, and F. M. Ghannouchi, “Design for linearizability of GaN
based multicarrier Doherty power amplifier through bias
optimization,” 19th IEEE International Conference on Electronics,
Circuits, and Systems (ICECS2012), Seville, Spain, December 2012,
pp. 492495.

O. Hammi,
A. M. Kedir, and F. M. Ghannouchi, “Nonuniform memory polynomial
behavioral model for wireless transmitters and power amplifiers,”
2012 IEEE AsiaPacific Microwave Conference (APMC2012), Kaohsiung,
Taiwan, December 2012, pp. 836838.

A. H. AbdelHafiz,
O. Hammi, and A. Zerguine, “Efficient adaptive
identification of nonlinear power amplifiers using twinnonlinear
twobox model,” IEEE VTS AsiaPacific Wireless Communications
Symposium (APWCS 2012), Kyoto, Japan, Aug. 2012, (accepted).

A. AlMansour, R. AlSafaria,
O. Hammi, and M. S. Sharawi, “Programmable portable RF
wireless power meter,” 3rd Saudi Students Scientific Conference,
AlKhobar, Saudi Arabia, May 2012.

O. Hammi,
“Enhanced delay alignment method for behavioral modeling of power
amplifiers exhibiting memory effects,” 16th IEEE Mediterranean
Electrotechnical Conference (MELECON2012), Yasmine Hammamet,
Tunisia, Mar. 2012, pp. 404407.

O. Hammi,
“Orthogonal polynomial based Hammerstein behavioral model for power
amplifiers with strong memory effects,” 2010 IEEE AsiaPacific
Microwave Conference (APMC2010), Yokohama, Japan, Dec. 2010, pp.
441444.

O. Hammi,
A. Kwan, M. Helaoui, and F. M. Ghannouchi, “Green power
amplification systems for 3G+ wireless communication
infrastructure,”
2010 IEEE 72nd Vehicular Technology Conference (VTC2010Fall),
Ottawa, Canada, Sep. 2010, pp. 15.

F. M. Ghannouchi, F. Taringou, and O. Hammi, “A dual branch
HammersteinWiener architecture for behavior modeling of wideband RF
transmitters,”
2010 IEEE MTTS International Microwave Symposium (IMS’2010),
Anaheim, CA, USA, May 2010, pp. 16921695.

A. Kwan, O. Hammi, M. Helaoui, and F. M. Ghannouchi, “High
performance wideband digital predistortion platform for 3G+
applications with better than 55dBc over 40 MHz bandwidth,”
2010 IEEE MTTS International Microwave Symposium (IMS’2010),
Anaheim, CA, USA, May 2010, pp. 10821085.

O. Hammi
and F. M. Ghannouchi, “Comparative study of recent advances in power
amplification devices and circuits for wireless communication
infrastructure,”
16^{th} IEEE International Conference on Electronics,
Circuits, and Systems (ICECS’2009),
Yasmine Hammamet, Tunisia, December 2009, pp. 379382.

S. A. Bassam, M. M. Ebrahimi, A. Kwan, M. Helaoui, M. P. Aflaki,
O. Hammi, M. Fattouche, and F. M. Ghannouchi,
“A generic architecture for smart multistandard software defined
radio systems,”
SDR’09 Technical Conference and Product Exposition,
Washington, DC, USA, December 2009, on CDROM.

O. Hammi,
S. Carichner, B. Vassilakis, and F. M. Ghannouchi, “Effects of crest
factor reduction on the predistortion performance for multicarrier
3G RF power amplifiers,”
2009 IEEE MTTS International Microwave Symposium (IMS’2009),
Boston, MA, USA, June 2009, pp. 10851088.

O. Hammi
and F. M. Ghannouchi, “Efficiency optimization of WCDMA driven
twoway Doherty power amplifiers over wide power range,”
2009 IEEE Canadian Conference on Electrical and Computer Engineering
(CCECE’2009),
St. John’s, NF, Canada, May 2009, pp. 12171220.

K. Rawat, O. Hammi, and F. M. Ghannouchi, “Investigating
effect of quadrature imperfection of vector multiplier in
implementing RF/Digital predistortion,” 2009 IEEE Wireless and
Microwave Technology Conference (WAMICON 2009), Clearwater, FL,
USA, April 2009,
on CDROM.

O. Hammi,
M. Younes, B. Vassilakis, and F. M. Ghannouchi, “Digital
predistorters sensitivity to delay alignment resolution,”
2009 IEEE Radio and Wireless Symposium (RWS 2009),
San Diego, CA, USA, January 2009, pp. 606609.

O. Hammi,
S. Carichner, B. Vassilakis, and F. M. Ghannouchi, “On the
predistortability of high efficiency multicarrier power amplifiers
for wireless communication infrastructure,” IEEE Topical
Symposium on Power Amplifiers for Wireless Communications, San
Diego, CA, USA, January 2009.

J. Li, O. Hammi, and F. M. Ghannouchi,
“Implementation
of dualchannel receiver suitable for 3G power amplifiers
characterization in RF/digital predistortion systems,”
IEEE International Conference on Electronics, Circuits and Systems,
Malta, August 2008, pp. 169172.

O. Hammi,
S. Carichner, B. Vassilakis, and F. M. Ghannouchi, “Novel approach
for static nonlinear
behavior
identification in RF power amplifiers exhibiting memory effects,”
2008 IEEE MTTS International Microwave Symposium (IMS’2008),
Atlanta, GA, USA, June 2008, pp. 15211524.

T. Liu, Y. Ye, S. Boumaiza, M. Helaoui, O. Hammi, and F. M.
Ghannouchi, “Accurate identification of static nonlinear properties
of wideband RF power amplifiers”, 6th International Conference on
Microwave and Millimeter Wave Technology, Nanjing, China, April
2008, pp. 13511354.

O. Hammi,
F. M. Ghannouchi, and B. Vassilakis, “2D vector quantized
behavioral model for wireless transmitters’ nonlinearity and memory
effects modeling,”
2008 IEEE Radio and Wireless Symposium (RWS 2008),
Orlando, FL, USA, January 2008, pp. 763766.

S. Bensmida, O. Hammi, and F. M. Ghannouchi, “High efficiency
digitally linearized GaN based power amplifier for 3G applications,”
2008 IEEE Radio and Wireless Symposium (RWS 2008),
Orlando, FL, USA, January 2008, pp. 751754.

T. Ying, O. Hammi, S. Boumaiza, and F. M. Ghannouchi, “Design
and optimization of digital signal component separator of LINC
transmitters using FPGA processors,”
2007 IEEE International Conference on Signal Processing and
Communications (ICSPC 2007),
Dubai, UAE, November 2007, pp. 836839.

O. Hammi,
S. Boumaiza, B. Vassilakis, and F. M. Ghannouchi, “On the effects of
the average power of training sequences used to synthesize memory
digital predistorters in WCDMA transmitters,”
37th IEEE European Microwave Conference (EuMC2007),
Munich, Germany, October 2007, pp. 174177.

O. Hammi,
S. Boumaiza, B. Vassilakis, and F. M. Ghannouchi, “Digital
predistorter architecture with small signal gain control for highly
nonlinear RF power amplifiers,” 50^{th} IEEE
International Midwest Symposium on Circuits & Systems (MWSCAS2007),
Montreal, Qc, Canada, August 2007, pp. 12011204.

N. Messaoudi, O. Hammi, S. Boumaiza, and F. M. Ghannouchi, “A
comparative study of power amplifier’s sensitivity to mismatched
load: single branch vs. Doherty architectures”, IEEE Canadian
Conference on Electrical and Computer Engineering, Vancouver,
BC, Canada, April 2007, on CDROM.

O. Hammi,
S. Boumaiza, and F. M. Ghannouchi, “Multibranch polynomial model of
RF power amplifiers with embedded average power dependency”, IEEE
Canadian Conference on Electrical and Computer Engineering,
Vancouver, BC, Canada, April 2007, on CDROM.

O. Hammi,
S. Boumaiza, and F. M. Ghannouchi, “Study of the output load
mismatch effects on the load modulation of Doherty power
amplifiers”, IEEE Radio Wireless Symposium (RWS 2007), Long
Beach, CA, USA, January 2007, pp. 393  394a.

O. Hammi,
S. Boumaiza, and F. M. Ghannouchi, “On the robustness of the
predistortion function synthesis for highly nonlinear RF power
amplifiers linearization,”
IEEE European Microwave Conference (EuMC2006),
Manchester, UK, September 2006, pp. 145148.

O. Hammi,
S. Boumaiza, J. Kim, S. Hong, I. Kim, B. Kim, and F. M. Ghannouchi,
“RF power amplifiers for emerging wireless communications: single
branch vs. multibranch architectures”, IEEE Canadian Conference
on Electrical and Computer Engineering, Ottawa, ON, Canada, 710
May 2006, pp. 1469  1472.

O. Hammi
and F. Ghannouchi, “Temperature compensated digital predistorter for
3G power amplifiers”,
IEEE International Conference on Electronics, Circuits and
Systems (ICECS’2005), Carthage, Tunisia, December 2005.

O. Hammi,
S. Bousnina, and F. M. Ghannouchi, “A linearized Doherty amplifier
using complex baseband digital predistortion driven by CDMA
signals”, IEEE Radio and Wireless Conference (RAWCON’2004),
Atlanta, GA, USA, 1922 September 2004, Conference Proceedings, pp.
435438.

O. Hammi,
S. Boumaiza, M. Jaidane, and F. M. Ghannouchi, “Baseband
digital predistortion using subband filtering technique”,
IEEE MTTS International Microwave Symposium (IMS’2003),
Philadelphia, PA, USA, 813 June 2003, Symposium Digest, Vol. 3, pp.
16991702.

O. Hammi,
S. Boumaiza, M. JaidaneSaidane, and F. M. Ghannouchi, “Adaptive baseband digital predistorter suitable for wideband signals”,
14^{th} International
Conference on Microelectronics (ICM’2002), Beirut,
Lebanon, 1113 December 2002, Conference Proceedings, pp. 131134.

O. Hammi,
M. JaidaneSaidane, S. Boumaiza, and F. M. Ghannouchi, “Subband
digital predistorter for 3G applications”, 8th International
Symposium of Microwave & Optical Technology (ISMOT’2001),
Montreal, Qc, Canada 1923 June 2001, Symposium Digest, pp. 199202.



