S. Samadi

Bio

S. Samadi is a graduate of Tokyo Institute of Technology and holds a Ph.D. degree in Physical Electronics. As an undergraduate student at Tokyo Tech, he had the opportunity to study under some of Japan's influential and pinoneering academics in physical electronics, circuits, systems and signal processing. He has a broad range of research interests in digital signal processing and applied mathematics. His academic career spans over two continents, three countries and five academic institutions. In Canada, he was an Associate Professor at Concordia University. He taught at the University of Electro-Communications and Shibaura Institute of Technology in Japan.

Research Interests

Digital Signal Processing

Modular array architectures
Exact multiplierless realization of digital filters
Analytic design of digital filters
Applications of multirate discrte-time systems
Detection of pure harmonic signals
Fast Hadamard transforms

Evolutionary Algorithms and Design

Evolutionary algorithms and their application to DSP and circuit design
Evolutionary design of fast transform algorithms

Applied Mathematics

Mathematical inequalities
Continued fractions

Publications

Journals

K. Kurishima, K. Furuya and S. Samadi, ``Theoretical study of electron wave diffraction caused by transverse potential grating-effect of incident angle,'' IEEE Journal of Quantum Electronics, vol. 25, no. 11, pp. 2350--2356, 1989.
K. Furuya, K. Kurishima and S. Samadi, ``Characteristics of Electron Diffraction Transistor,'' IEICE Transactions, vol. E72, no.4, pp. 307--309, 1989.
S. Samadi, A. Nishihara and N. Fujii, ``On group delay sensitivity properties of complex allpass filters,'' IEICE Trans. Fundamentals, vol. E74, no. 11, pp. 3541--3545, 1991.
S. Samadi, T. Cooklev, A. Nishihara and N. Fujii, ``Multiplierless structure for maximally flat linear phase FIR filters," Electronics Letters, vol. 29, no.2, pp. 184--185, 1993.
S. Samadi, A. Nishihara and N. Fujii, ``Interval properties of lattice allpass filters with applications," IEICE Trans. Fundamentals, vol. E76-A, no. 10, pp. 1775--1780, 1993.
T. Cooklev, S. Samadi, A. Nishihara and N. Fujii, ``Efficient implementation of all maximally flat FIR filters of a given order," Electronics Letters, 29, no. 7, pp. 598--599, 1993.
S. Samadi, A. Nishihara and N. Fujii, ``Parallel and modular structures for FIR digital filters," IEICE Trans. Fundamentals, vol. E77-A, no. 3, pp. 467--474, 1994.
S. Samadi, A. Nishihara and N. Fujii, ``Graceful degradation for multiprocessor realization of maximally flat FIR digital filters," IEICE Trans. Electronics, vol. E77-C, no. 7, pp. 1083--1091, 1994.
S. Samadi, A. Nishihara and N. Fujii, ``Multiplierless arrays for realization of lowpass and highpass linear phase FIR digital filters,'' IEICE Trans. Fundamentals, vol. E79-A, no. 8, pp. 1112--1119, 1996.
S. Samadi, A. Nishihara and N. Fujii, ``Modular array structures for design and multiplierless realization of two-dimensional linear phase FIR digital filters,'' IEICE Trans. Fundamentals, vol. E80-A, no. 4, pp. 722--736, 1997.
S. Samadi and H. Iwakura, ``Variable Taylor realisation and improved approximation of FIR fractional delay systems,'' Int. J. Circuit Theory Appl., vol. 26, no. 5, pp. 513--522, 1998.
S. Samadi, Y. Igarashi and H. Iwakura, ``Design and multiplierless realization of maximally flat FIR digital Hilbert transformers,'' IEEE Trans. Signal Processing, vol. 47, no. 7, pp. 1946--1953, 1999.
S. Samadi, H. Iwakura and A. Nishihara, ``Multiplierless and hierarchical structures for maximally flat half-band FIR filters,'' IEEE Trans. Circuits Syst. II, vol. 46, no. 9, pp. 1225--1230, 1999.
S. Samadi, A. Nishihara and H. Iwakura, ``Filter-generating systems,'' IEEE Trans. Circuits Syst. II, vol. 47, no. 3, pp. 214--221, 2000.
S. Samadi, A. Nishihara and H. Iwakura, ``Universal maximally flat lowpass FIR systems,'' IEEE Trans. Signal Processing, vol. 48, no. 7, pp. 1956--1964, 2000.
S. Samadi, ``Explicit formula for improved filter sharpening polynomial,'' IEEE Trans. Signal Processing, vol. 9, no. 10, pp. 2957--2959, 2000.
S. Samadi and A. Nishihara, ``More on filter-generating systems,'' Facta Universitatis, Series: Electronics and Energetics, vol. 13, no. 3, pp. 365--377, 2000.
S. Samadi, M. Omair Ahmad and M.N.S. Swamy, ``Fast generation of universal maximally flat FIR filters,'' IEEE Trans. Circuits Syst. I, vol. 50, no. 3, pp. 441--444, 2003.
S. Samadi, M. Omair Ahmad and M.N.S. Swamy, ``Characterization of nonuniform perfectreconstruction filter banks using unit-step signal,'' IEEE Trans. Signal Processing, vol. 52, no. 9, pp. 2490--2499, 2004.
S. Samadi, M. Omair Ahmad and M.N.S. Swamy, ``Characterization of B-spline digital filters,'' IEEE Trans. Circuits Syst. I, vol. 51, no. 4, pp. 808--816, 2004.
S. Samadi, M. Omair Ahmad and M.N.S. Swamy, ``Exact fractional-order differentiators for polynomial signals,’’ IEEE Signal Processing Lett., vol. 11, no. 6, pp. 529--532, 2004.
S. Samadi, M. Omair Ahmad and M.N.S. Swamy, ``Results on maximally flat fractionaldelay systems,’’ IEEE Trans. Circuits Syst. I, vol. 51, no. 11, pp. 2271--2286, 2004.
S. Samadi, M. Omair Ahmad and M.N.S. Swamy, ``Z-transform of quantized ramp signal,’’ IEEE Trans. Signal Processing, vol. 53, no. 1, pp. 380--383, 2005.
S. Samadi, M. Omair Ahmad and M.N.S. Swamy, ``Complete characterization of systems for simultaneous Lagrangian upsampling and fractional-sample delaying,’’ IEEE Trans. Circuits Syst. I, vol. 52, no. 3, pp. 656--667, 2005.
S. Samadi, M. Omair Ahmad and M.N.S. Swamy, ``Ramanujan sums and discrete Fourier transforms,’’ IEEE Signal Processing Lett., vol. 12, no. 4, pp. 293--296, 2005.
S. Samadi and A. Nishihara: ``Explicit formula for predictive FIR filters and differentiators using Hahn orthogonal polynomials'', IEICE Trans. Fundamentals., vol. E90-A, no. 8, pp. 1511--1518, 2007.
S. Samadi, M.O. Ahmad, A. Nishihara, and M.N.S. Swamy, ``Eigensignals of downsamplers in time and transform domains'', IEICE Trans. Fundamentals., E90-A, 9, pp. 1904--1912, 2007.
S. Samadi and A. Nishihara, ``The world of flatness'', IEEE Circuits and Systems Magazine, vol. 7, No.3, pp. 38--44, 2007.
S. Samadi, K. Mollaiyan and A. Nishihara, ``Discrete Wirtinger-Type Inequalities for Gauging the Power of Sinusoids Buried in Noise'', IEICE Treans. Fundamentals., vol. E92-A no. 9, pp. 722--732, 2009.
W. Wu, M. O. Ahmad and S. Samadi, ``Discriminant analysis based on modified generalised singular value decomposition and its numerical error analysis,'' IET Computer Vision, vol. 3, no. 3, pp. 159--173, 2009.
S. Samadi and A. Nishihara, "A Class of Continued Fraction Inequalities," Mathematical Inequalities and Applications, vol. 19.1, pp. 263--269, 2016.

International Conferences

S. Samadi, A. Nishihara and N. Fujii, ``Design of approximately linear phase lattice digital allpass filters via lattice parameters,'' In Proc. IEEE International Symposium on Circuits and Systems, pp. 2425-2428, San Diego, CA, 1992.
S. Samadi, A. Nishihara and N. Fujii, ``Designing lattice allpass filters with finite wordlength,'' In Proc. 1992 IEEE Asia-Pacific Conference on Circuits and Systems, pp. 481-484, Sydney, Australia, 1992.
T. Cooklev, S. Samadi, A. Nishihara and N. Fujii, ``Maximally flat approximation for twodimensional FIR digital filters with applications in sampling rate conversion,'' In Proc. European Conference on Circuit Theory and Design, Circuit Theory and Design, pp. 385-390, Davos, Switzerland,1993.
S. Samadi, A. Nishihara and N. Fujii, ``Modular realization of bandstop and bandpass FIR digital filters," In Proc. International Symposium on Circuits and Systems, pp. 73-76, vol. 2, London, U.K., 1994.
S. Samadi, A. Nishihara and N. Fujii, ``Multiplier-less 2-D FIR digital filters with circular and diamond-shaped passbands using primitive 1-D building blocks,'' In Proc. European Conference on Circuit Theory and Design, Proceedings: vol. 2, pp. 583-588, Budapest, Hungary, 1997.
S. Samadi, Y. Suzukake and H. Iwakura, ``On automatic derivation of fast Hadamard transform using genetic programming,'' In Proc. 1998 IEEE Asia-Pacific Conference on Circuits and Sytems, pp. 327-330, Thailand, 1998.
H. Shibata, S. Samadi and H. Iwakura, ``Evolutionary design of analog electronic circuits,'' In Proc. 4th International Symposium on Artificial Life and Robotics, pp. 544-547, Oita, Japan, 1999.
S. Samadi, A. Nishihara and H. Iwakura, ``Generalized half-band maximally flat FIR filters,'' In Proc. IEEE International Symposium on Circuits and Systems, pp. 279-282, vol. 3, Orlando, Florida, 1999.
S. Samadi, A. Nishihara and H. Iwakura, ``FIR multiplierless cellular networks,'' In Proc. European Conference on Circuit Theory and Design, Circuit Theory and Design, pp. 265-268, Stresa, Italy, 1999.
S. Samadi and A. Nishihara, ``Explicit formula for generalized half-band maximally flat diamond-shaped filters,'' In Proc. IEEE International Symposium on Circuits and Systems, pp. 355-358, vol.3, Geneva, Switzerland, 2000.
S. Samadi and A. Nishihara, ``Response of maximally flat lowpass filters to polynomial signals, '' In Proc. IEEE International Symposium on Circuits and Systems, pp. 93-96, vol. 2, Sydney, Australia, 2001.
S. Samadi, A. Nishihara, M.O. Ahmad and M.N.S. Swamy, ``Step-response-based characterization of nonuniform perfect-reconstruction filter banks,'' In Proc. IEEE International Symposium on Circuits and Systems, pp. 829-832, vol.1, Scottsdale, Arizona, 2002.
S. Samadi and A. Nishihara, ``Concise representation and cellular structure for universal maximally flat FIR filters,’’ In Proc. IEEE International Symposium on Circuits and Systems, pp. 201- 204, vol.4, Bangkok, Thailand, 2003.
S. Samadi, M.N.S. Swamy, and M.O. Ahmad, `` Time and Frequency Domain Analysis of a General Class of Fractional-Order Differencers,’’ In Proc. First IFAC Workshop on Fractional Differentiation and its Applications, Bordeaux, France, 2004.
S. Samadi, A. Nishihara, M.O. Ahmad and M.N.S. Swamy, ``Dedicated structure for tunable multiband FIR filters with linear phase and maximally flat magnitude,’’ in Proc. 2004 IEEE Asia-Pacific Conference on Circuits and Systems, vol.1, pp. 413-416, Tainan, Taiwan, 2004.
S. Samadi, M.O. Ahmad and M.N.S. Swamy, ``Multiplier-free structures for exact generation of natural powers of integers,’’ In Proc. IEEE International Symposium on Circuits and Systems, vol. 2, pp. 1146-1149, Kobe, Japan, 2005.

国内シンポジウム・研究会等

S. Samadi, A. Nishihara and N. Fujii, ``Parallel and modular structures for FIR digital filters," 6th Karuizawa Workshop on Circuits and Systems, pp. 471-476, Apr. 1993.
S. Samadi, A. Nishihara and N. Fujii, ``Stancu operator and FIR digital filters," 8th Digital Signal Processing Symposium, pp. 275-281, Oct. 1993.
五十嵐良仁・サエドサマディ・岩倉博：最大平坦ヒルベルト変換器の設計とその無乗算器構成, 第１２回ディジタル信号処理シンポジウム, 1997.
伊藤亘・サエドサマディ・岩倉博：遺伝的プログラミングによる無乗算器FIRディジタルフィルタの伝達関数及び構造の自動設計, 第１１回回路とシステム軽井沢ワークショップ, 1998.
S. Samadi, A. Nishihara and H. Iwakura, ``Explicit maximally flat solutions to $H(z_1,z_2) \pm H(-z_1,-z_2)=z_1^{-D_1}z_2^{-D_2}$,''第１４回ディジタル信号処理シンポジウム, 1999.
鈴掛裕、サエドサマディ、岩倉博：シグナルフローグラフのマルチレートシステムによる表現について,第１４回ディジタル信号処理シンポジウム, 1999.
村木一夫・サエドサマディ・岩倉博：セルアレイFIRディジタルフィルタの自動設計, 電子情報通信学会総合大会,A-4-3, 99/3.
柴田肇・サエドサマディ・岩倉博：PGAコーディングを用いた遺伝的アルゴリズムによるアナログ回路の自動設計, 電子情報通信学会総合大会, A-1-48, 99/3.
高田憲一・柴田肇・サエドサマディ・岩倉博：進化論的回路設計におけるジャンク回路の除去について, 電子情報通信学会総合大会, A-1-49, 99/3.