Research Interest
Dr. Adhami has nearly 20 years of experience in the areas of digital signal processing, digital image processing, speech recognition, and pattern recognition. He has contributed to the many applications of wavelet transform including vibration analysis, mammographic lesion classification, localized computed tomography, and data compression.
Degrees
- Ph.D. in Electrical Engineering, The University of Alabama in Huntsville, Alabama, 1985.
- M.S.E. in Electrical Engineering, The University of Alabama in Huntsville, Alabama, 1982.
- B.S.E. in Electrical Engineering, The University of Alabama in Huntsville, Alabama, 1981.
Recent Publications
“Theoretical Upper Bound of the Spurious Free Dynamic Range in Direct Digital Frequency Synthesizers Realized by Polynomial Interpolation Methods,” Ashkan Ashrafi and Reza Adhami, IEEE Transaction on Circuits and Systems-I: Regular Papers, Vol. 54, No. 10, Oct. 2007.
“A 1GHz Direct Digital Frequency Synthesizer Based on the Quasi-Linear
Interpolation Method,” A. Ashrafi, A. Milenkovic and R. Adhami,
IEEE International Symposium on Circuits and Systems, May 2007.
“The Utilization of a Taylor Series-Based Transformation in Fingerprint
Verification,” Peter Meenen, Ashkan Ashrafi, and Reza Adhami, Pattern
Recognition Letters, Vol. 27, No.14, pp. 1606-1618, October 2006.
“An Optimized Direct Digital Frequency Synthesizer Based on Even
Fourth Order Polynomial Interpolation,” A. Ashrafi and R. Adhami,
Proc. of IEEE 38th Southeastern Symposium on System Theory, pp.
109-113, March 2006.
“Comments on ‘A 13-Bits Resolution ROM-Less Direct Digital Frequency
Synthesizer Based on a Trigonometric Quadruple Angle Formula’,”
Ashkan Ashrafi and Reza Adhami, IEEE Transactions on Very Large
Scale Integration (VLSI) Systems, Vol.13, No.9, pp 1096-1098, Sept.
2005.
“Eigenvalues of Hadamard powers of large symmetric Pascal matrices”,
Ashkan Ashrafi and Peter M. Gibson, Linear Algebra and its Applications,
Vol. 405, pp 60-66, August 2005.
“FEXT Cancellation in MIMO DSL Systems,” A. Ghobriel and R. Adhami,
submitted to IEEE Transaction on Communications, April 2005.
“A Novel Approach to Fingerprint Pore Extraction,” M. Ray, P. Meenen,
and R. Adhami, IEEE Southeastern Symposium on System Theory, Tuskegee,
Alabama, March 2005.
“Approaches to Image Binarization in Current Automated Fingerprint
Identification Systems,” P. Meenen, and R. Adhami, IEEE Southeastern
Symposium on System Theory, Tuskegee, Alabama, March 2005.
“Parallel Implementation of 1-D Fast Fourier Transform without
Inter-processor Communication,” R. Al Na’mneh, W. Pan, and R. Adhami,
IEEE Southeastern Symposium on System Theory, Tuskegee, Alabama,
March 2005.
“A Tutorial on Using Hidden Markov Models for Phoneme Recognition,”
A. G. Veeravalli, W. Pan, R. Adhami, and P. G. Cox, IEEE Southeastern
Symposium on System Theory, Tuskegee, Alabama, March 2005.
“Communication Efficient Adaptive Matrix Transpose Algorithms for
FFT on Symmetric Multiprocessors,” Al Na’mneh, W. Pan, and R. Adhami,
IEEE Southeastern Symposium on System Theory, Tuskegee, Alabama,
March 2005.
“Phoneme Recognition using Hidden Markov Models,” A. G. Veeravalli,
W. Pan, R. Adhami and P. G. Cox, in Proc. of Huntsville Simulation
Conference (HSC’04), Huntsville, Alabama, Nov. 2004.
“Arbitrary waveform DDFS utilizing Chebyshev polynomials interpolation,”
Ashrafi, A., R. Adhami, L. Joiner, and P. Kaveh, IEEE Transactions
on Circuits and Systems I: Regular Papers, vol. 51, no. 8, pp. 1468-1475,
August 2004.
“A Novel ROM- less DDFS Based and Chevyshev Polynomial Interpolation,”
Ashkan Ashrafi, Zexin Pan, and R. Adhami, IEEE Southeastern Symposium
on System Theory, March 2004.
“Optimized phase-to-sine amplitude converter in direct digital
frequency synthesizers based on Chebyshev polynomials interpolation,”
Ashrafi, A., R. Adhami, L. Joiner, and P. Kaveh. IEEE
Transactions on Circuits and Systems II: Express Briefs, 2004.
“Broadband Communication in the Access Network,” Ayman Ghobriel
and R. Adhami, Communications in Computing, 2004.
“Fingerprint Image Enhancement: An Overview,” A. Veeravalli, P.
Meenen, R. Adhami, N. Velkur, and M. Ray, Proceeding of the 20004
International Conference on Imaging Science, Systems, and Technology (CISST’ 04) June 2004.
“A Finite Difference Solution to the Forward Problem of Electrocardiography,”
Robert D. Adams, Nagendra Singh, and R. Adhami, MSV/AMCS, 2004.
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