Refereed Journal Papers
- D.J. Shpak and A. Antoniou, "A generalized Remez method for the design of FIR digital filters," IEEE Trans. Circuits and Systems, pp. 161-174, Feb. 1990.
- D.J. Shpak and A. Antoniou, "Design of 2-D digital filters with octagonal passband and stopband boundaries," IEEE Trans. Circuits and Systems, pp. 1534-1542, Dec. 1991.
- D.J. Shpak and A. Antoniou, "A flexible method for the pattern synthesis of equispaced linear arrays with equiphase excitation," IEEE Trans. Antennas and Propagation, pp. 1113-1120, Oct. 1992.
- D.J. Shpak, "The analytical design of biquadratic filter sections for parametric filters," Journal of the Audio Engineering Society, pp. 876-885, Nov. 1992.
- D. J. Shpak, "A method for the optimal pattern synthesis of linear arrays with prescribed nulls," IEEE Trans. Antennas and Propagation, pp. 286-294, March 1996.
- A. Sabaa, F. Elguibaly, and D. Shpak, "Performance analysis of an improved selective repeat protocol for high-speed networks," Canadian Journal of Electrical and Computer Engineering, pp. 29-36, Jan. 1997.
- A. Sabaa, F. ElGuibaly, and D. Shpak, "Design and modelling of a nonblocking input-buffer ATM switch," Canadian Journal of Electrical and Computer Engineering, pp. 87-93, July, 1997.
- S. Subramanian, D.J. Shpak, and A. Antoniou, "Performance of a multiple-antenna multiple-equalizer system for a CDMA indoor wireless system," Wireless Personal Communications, pp. 97-123, Nov. 2000.
- R. Nongpiur, D.J. Shpak, and A. Antoniou, "NEXT cancellation system with improved convergence rate and tracking performance," IEE Proceedings, Communications, pp. 378-384, June 2005.
- R.C. Nongpiur, D. J. Shpak, and A. Antoniou, "An analysis of a near-end crosstalk cancelation system that uses adaptive filters," IEEE Trans. Circuits and Systems, Pt. I, Vol. 55, No. 10, pp. 3306-3316, Nov. 2008.
- D. Guindon, D. J. Shpak, and A. Antoniou, "Design methodology for nearly linear-phase recursive digital filters by constrained optimization," IEEE Trans. Circuits and Systems, Pt. I, Vol. 57, No. 7, pp. 1719-1731, July 2010.
- R.C. Nongpiur and D. J. Shpak, "Maximizing the signal-to-alias ratio in non-uniform filter banks for acoustic echo cancellation," IEEE Trans. Circuits and Systems, Pt. I, pp. 2315-2325, Oct. 2012.
- R.C. Nongpiur, D. J. Shpak and A. Antoniou, "Improved design method for nearly linear-phase IIR filters using constrained optimization," IEEE Trans. Signal Processing, Vol. 61, No. 4., pp. 895-906, Feb. 2013.
- R.C. Nongpiur and D. J. Shpak, "Impulse-noise suppression in speech using the stationary wavelet transform," Journal of the Acoustical Society of America, Vol. 133, No. 2, pp. 866-879, Feb. 2013.
- R.C. Nongpiur and D. J. Shpak, "L-infinity norm design of linear-phase robust broadband beamformers using constrained optimization," IEEE Trans. Signal Processing, Vol. 51, No. 23, pp. 6034-6046, Sep. 2013.
- R.C. Nongpiur, D. J. Shpak, and A. Antoniou, "Design of IIR digital differentiators using constrained optimization," IEEE Trans. Signal Processing, Vol. 62, No. 7, pp. 1729-1739, July 2014.
- R.C. Nongpiur and D. J. Shpak, "Synthesis of linear and planar arrays with minimum element selection," IEEE Trans. Signal Processing, Vol. 62, No. 20, pp. 5398-5410, Oct. 2014.
- A. Omar, D. Shpak, and P. Agathoklis, "Improved Design Method for Nearly Linear-Phase IIR Filters Using Constrained Optimization," Journal of Circuits, Systems, and Computers, April 2021.
Refereed Conference Papers
- G. Csanyi-Fritz, D. Shpak and L.T. Bruton, "CMOS integrator module for real-time digital filter applications," 1984 Canadian Conf. on VLSI Technical Digest, Edmonton, pp. 5.160-5.163, 1984.
- L.T. Bruton and D.J. Shpak, "Image enhancement using spatially-variant two-dimensional recursive filters," IEEE International Symposium on Circuits and Systems, Montreal, pp. 1038-1041, 1984.
- D. J. Shpak and A. Antoniou, "Two robust Remez methods for the design of FIR digital filters meeting prescribed specifications," IEEE International Symposium on Circuits and Systems, Helsinki, pp. 47-51, 1988.
- D.J. Shpak and A. Antoniou, "Beamsteering using elements with complex gains," Canadian Conference on Electrical and Computer Engineering, Vancouver, pp. 227-230, 1988.
- D.J. Shpak and A. Antoniou, "Discrete linear array shading using Chebyshev optimization," Canadian Conf. on Electrical and Computer Engineering, Vancouver, pp. 371-374, 1988.
- D.J. Shpak and A. Antoniou, "Nearly circularly symmetric, computationally efficient 2-D digital lowpass filters realized by cascading four 1-D digital filters," Canadian Conference on Electrical and Computer Engineering, Vancouver, pp. 629-632, 1988.
- D.J. Shpak, "A weighted-least-squares matrix decomposition method with application to the design of two-dimensional digital filters," IEEE 33rd Midwest Symposium on Circuits and Systems, Calgary, pp. 1070-1073, Aug. 1990.
- D.J. Shpak, "The analytical design of biquadratic parametric filters," IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, Victoria, pp. 649-652, May, 1991.
- D.J. Shpak, "A transformation method for the design of two-dimensional circularly-symmetric FIR digital filters," IEEE International Symposium on Circuits and Systems, Singapore, pp. 2475-2478, June, 1991.
- S. Subramanian, D.J. Shpak, P.S.R. Diniz, and A. Antoniou, "The performance of adaptive filtering algorithms in a simulated HDSL environment," Proc. of Can. Conf. on Electrical and Computer Engineering, Toronto, pp. TA 2.19.1-4, Sept. 1992.
- S. Subramanian, D.J. Shpak, and A. Antoniou, "Adaptive filtering for HDSL equalizers," IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, Victoria, pp. 346-349, May 1993.
- D. Bhattacharya, S. Subramanian, D. Shpak, A. Antoniou, "VLSI design of echo cancelers for the HDSL system," Can. Conf. on Electrical and Computer Engineering, Vancouver, pp. 1180-1183, Sept. 1993.
- D.J. Shpak, "A fast method for the design of optimal linear array functions with prescribed nulls," IEEE Oceans '93, Victoria, pp. 231-236, Oct. 1993
- M. Fahmi, F. El-Guibaly, E. Abdel-Raheem, A. Tawfik and D. Shpak, "Area-time efficient fixed point multiplier-accumulators for inner-product computation," IEEE International Conference on Microelectronics, Dhahran, Saudi Arabia, pp. 185-188, Dec. 1993.
- M. N. Fahmi, F. El-Guibaly, S. Sunder, and D. Shpak, "Design of novel serial-parallel inner-product processors," IEEE International Symposium on Circuits and Systems, London, pp. 4.55-4.58, May, 1994.
- R.L. Kirlin, B.A. Hedstrom, S. Subramanian, and D.J. Shpak, "Robust array processing for DOA estimation with widely spaced sensors," IEEE Seventh SP Workshop on Statistical Signal and Array Processing, Quebec City, pp. 173-176, June, 1994.
- S. Subramanian, M.L.R. de Campos, D.J. Shpak, and A. Antoniou, "A robust quasi-Newton adaptive filtering algorithm for digital cellular radio," International Conference on Signal Processing Applications & Technology, Dallas, pp. 328-333, Oct., 1994.
- S. Subramanian, D. J. Shpak, and A. Antoniou, "Performance of a quasi-Newton adaptive filtering algorithm for a CDMA indoor wireless system," IEEE International Symposium on Circuits and Systems, Seattle, pp. I.89-I.92, May 1995.
- S. Subramanian, M. de Campos, D.J. Shpak, and A. Antoniou, "Investigation of the autocorrelation matrix in the presence of correlated co-channel interference in indoor wireless networks," IEEE Pacific Rim Conference on Communications, Computers and Signal Process., Victoria, pp. 165-168, May 1995.
- A. Sabaa, F. El-Guibaly, E. Manning, and D. Shpak, "A new protocol for flow control in ATM networks," IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, Victoria, pp. 96-99, May 1995.
- F. El-Guibaly, A. Almulhem, A. Sabaa, and D. Shpak, "A high speed CORDIC algorithm," IEEE Pacific Rim Conf. on Comm., Computers and Signal Process., Victoria, pp. 485-488, May 1995.
- H. El-Gebaly, A. Sabaa, J. Muzio, F. El-Guibaly, and D. Shpak, "Performance evaluation of a window-based approach for ATM cell scheduling," Canadian Conference on Electrical and Computer Engineering, Montreal, pp. 36-39, Sept. 1995.
- A. Sabaa, H. El-Gebaly, F. El-Guibaly, J. Muzio, and D. Shpak, "Implementation of a window-based scheduler in an ATM switch," Canadian Conference on Electrical and Computer Engineering, Montreal, pp. 32-35, Sept. 1995.
- D.J. Shpak, "An improved method for the design of linear arrays with prescribed nulls," Oceans '95 MTS/IEEE, San Diego, vol. 2, pp. 1303-1310, October 1995.
- F. El-Guibaly, A. Sabaa, and D. Shpak, "A new shift-register based ATM switch", Emerging Technologies and Applications in Communications, Portland, OR, p. 24-28, May 1996.
- S. Subramanian, D.J. Shpak, and A. Antoniou, "Performance of a multiple-antenna-multiple-equalizer system for a CDMA indoor wireless system," Bienniel Symposium on Communications, Kingston, Canada, pp. 211-215, June 1996.
- S. Subramanian, D.J. Shpak, and A. Antoniou, "An indoor wireless system strategy based on a multiple-antenna-multiple-equalizer system," IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, Victoria, pp. 206-209, August 1997.
- S. Subramanian, D.J. Shpak, and A. Antoniou, "Interference supression in a multiple-antenna-multiple-equalizer system for CDMA indoor wireless communications," IEEE Pacific Rim Conf. on Communications, Computers and Signal Processing, Victoria, pp. 202-205, August 1997.
- N. Ko, D.J. Shpak, and A. Antoniou, "Design of recursive delay equalizers using constrained optimization," IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, Victoria, pp. 173-177, August, 1997.
- J. Singh, A. Antoniou, and D.J. Shpak, "Hardware implementation of a wavelet based image compression coder," IEEE Symposium on Advances in Digital Filtering and Signal Processing, Victoria, pp. 169-173, June 1998.
- J. Singh, A. Antoniou, and D. J. Shpak, "A distributed memory and control architecture for 2-D wavelet transform", IEEE International Symposium on Circuits and Systems, Orlando, v. 3, pp. 387-390, June 1999.
- D. Sasmal, W.-S. Lu, D. Shpak, and A. Antoniou, "Interpolation techniques for a LIDAR profiler system," IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, Victoria, pp. 185-188, August, 1999.
- J. Singh, A. Antoniou, and D. J. Shpak, "A systolic array architecture for inverse discrete wavelet transform," IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, Victoria, pp. 193-196, August, 1999.
- D.J. Shpak, "Designing FIR digital filters having exact in-band values", 14th International Conference on Digital Signal Processing, Santorini, vol. 1, pp. 281-284, July 2002.
- D.J. Shpak, A. Omran, and P.-C. Tang, "Direct encapsulation of IP within SONET for metro and access services", 18th National Fiber Optics Engineers Conference, Dallas, pp. 1676-1685, Sept. 2002.
- R. Nongpiur, D.J. Shpak, and A. Antoniou, "Near-end crosstalk cancellation in xDSL systems", 36th Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, vol. 1, pp. 393-397, 2002.
- R.C. Nongpiur, D.J. Shpak, and A. Antoniou, "NEXT cancellation in xDSL systems using variable-length cancellers," IEEE International Symposium on Circuits and Systems, Bangkok, vol. 4, pp. 345-348, May 2003.
- R.C. Nongpiur, D.J. Shpak, and A. Antoniou, "Application of NLMS, PNLMS, and i-PNLMS algorithms for NEXT cancellation in xDSL systems," IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, Victoria, pp. 418-421, August 2003.
- D.J. Shpak, "Design of mixed-norm FIR filters using an unconstrained least-pth algorithm," IEEE Pacific Rim Conference on Communications, Computers and Signal Processing, Victoria, pp. 253-255, August 2003.
- D.J. Shpak, P.-C. Tang, and E.G. Manning, "Supporting everything-on-demand in cable services," 19th National Fiber Optics Engineers Conference, Orlando, pp. 1458-1464, Sept. 2003.
- R.C. Nongpiur, D.J. Shpak, and A. Antoniou, "NEXT cancellers using FDLMS filters with improved convergence rate," 37th Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, vol. 1. pp. 576 - 580, Nov. 2003.
- R.C. Nongpiur, D.J. Shpak, and A. Antoniou, "Tracking performance of an FDLMS near-end crosstalk canceller for xDSL systems," IEEE International Symposium on Circuits and Systems, Vancouver, vol. 3, pp. 261-264, May, 2004.
- T. Darcie, E. Manning, D. Shpak, and N. Tzonev, "Emerging SONET-Based Solutions for Cable Network Evolution," 2004 National Cable & Telecommunications Association Technical Papers, New Orleans, pp. 97-106, May, 2004.
- B. Riel, D. Shpak, and A. Antoniou, "Oversampled biorthogonal cosine-modulated filter bank realization using a critically-constrained lifting scheme," Northeast Workshop on Circuits and Systems, Montreal, pp. 285-288, June 2004.
- B. Riel, D. Shpak, and A. Antoniou, "Lifting-based design and implementation of oversampled paraunitary modulated filter banks," IEEE International Midwest Symposium on Circuits and Systems, Hiroshima, v. 2, pp. 97-100, July 2004.
- T. Ducharme, D.J Shpak, N. Tzonev, T.E. Darcie, E.G. Manning, and A. Shoja, "IP Frame Switching: A Third-Generation SONET Technology," Optical Fiber Communication Conference & Exposition and the National Fiber Optic Engineers Conference, Anaheim, March, 2005.
- R. C. Nongpiur, D. J. Shpak, and A. Antoniou, "Average power sum of the near-end crosstalk couplings after near-end crosstalk cancellation," IEEE International Symposium on Circuits and Systems, Kos, Greece, pp. 3470-3473, May 2006.
- D. Guindon, D. Shpak, and A. Antoniou, "Design of nearly linear-phase recursive digital filters by constrained optimization", IEEE Northeast Workshop on Circuits and Systems (NEWCAS), Toulouse, France, pp. 219-222, June 2009.
- R. C. Nongpiur and D. J. Shpak, "Bi-criterion optimization of non-uniform filter banks for acoustic echo cancellation," IEEE International Symposium on Circuits and Systems, Rio de Janeiro, Brazil, pp. 1073-1076, May 2011.
- R. C. Nongpiur and D. J. Shpak, "Maximizing the signal/alias ratio in non-uniform filter banks for acoustic echo cancellation," IEEE Northeast Workshop on Circuits and Systems (NEWCAS), Bordeaux, France, pp. 402-405, June 2011.
- R. C. Nongpiur, D. J. Shpak and P. Agathoklis, "Design of Optimal Wavelets for Detecting Impulse Noise in Speech," IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Florence, Italy, May 2014.
- D.J. Shpak, "Improving IIR Filter Design by Considering the Allocations and Locations of Poles and Zeros," IEEE International Symposium on Circuits and Systems, Seville, Oct. 2020.
Invited Conference Presentations
- D.J. Shpak, "A constrained complex Remez method for the design of digital filters and antenna arrays," International Conference on Personal Wireless Communication, Victoria, June 1995.