RADOMIR S. STANKOVIC, PhD, is Professor, Department of Computer Science, Faculty of Electronics, University of Nis, Serbia. CLAUDIO MORAGA, PhD, is Professor, Department of Computer Science, Dortmund University, Germany.JAAKKO T. ASTOLA, PhD, is Professor, Institute of Signal Processing, Tampere University of Technology, Finland.

"…a concise monograph about the algebraic structures theory used in the Fourier analysis of signals and systems…useful for applied mathematicians and for engineers…" (Computing Reviews.com, November 3, 2005)

• Preface. Acknowledgments.Acronyms.1 Signals and Their Mathematical Models.1.1 Systems.1.2 Signals.1.3 Mathematical Models of Signals.References.2 Fourier Analysis.2.1 Representations of Groups.2.1.1 Complete Reducibility.2.2 Fourier Transform on Finite Groups.2.3 Properties of the Fourier Transform.2.4 Matrix Interpretation of the Fourier Transform on Finite Non-Abelian Groups.2.5 Fast Fourier Transform on Finite Non-Abelian Groups.References.3 Matrix Interpretation of the FFT.3.1 Matrix Interpretation of FFT on Finite Non-Abelian Groups.3.2 Illustrative Examples.3.3 Complexity of the FFT.3.3.1 Complexity of Calculations of the FFT.3.3.2 Remarks on Programming Implememtation of FFT.3.4 FFT Through Decision Diagrams.3.4.1 Decision Diagrams.3.4.2 FFT on Finite Non-Abelian Groups Through DDs.3.4.3 MMTDs for the Fourier Spectrum.3.4.4 Complexity of DDs Calculation Methods.References.4 Optimization of Decision Diagrams.4.1 Reduction Possibilities in Decision Diagrams.4.2 Group-Theoretic Interpretation of DD.4.3 Fourier Decision Diagrams.4.3.1 Fourier Decision Trees.4.3.2 Fourier Decision Diagrams.4.4 Discussion of Different Decompositions.4.4.1 Algorithm for Optimization of DDs.4.5 Representation of Two-Variable Function Generator.4.6 Representation of Adders by Fourier DD.4.7 Representation of Multipliers by Fourier DD.4.8 Complexity of NADD.4.9 Fourier DDs with Preprocessing.4.9.1 Matrix-valued Functions.4.9.2 Fourier Transform for Matrix-Valued Functions.4.10 Fourier Decision Trees with Preprocessing.4.11 Fourier Decision Diagrams with Preprocessing.4.12 Construction of FNAPDD.4.13 Algorithm for Construction of FNAPDD.4.13.1 Algorithm for Representation.4.14 Optimization of FNAPDD.References.5 Functional Expressions on Quaternion Groups.5.1 Fourier Expressions on Finite Dyadic Groups.5.1.1 Finite Dyadic Groups.5.2 Fourier Expressions on Q2.5.3 Arithmetic Expressions.5.4 Arithmetic Expressions from Walsh Expansions.5.5 Arithmetic Expressions on Q2.5.5.1 Arithmetic Expressions and Arithmetic-Haar Expressions.5.5.2 Arithmetic-Haar Expressions and Kronecker Expressions.5.6 Different Polarity Polynomials Expressions.5.6.1 Fixed-Polarity Fourier Expressions in C(Q2).5.6.2 Fixed-Polarity Arithmetic-Haar Expressions.5.7 Calculation of the Arithmetic-Haar Coefficients.5.7.1 FFT-like Algorithm.5.7.2 Calculation of Arithmetic-Haar Coefficients Through Decision Diagrams.References.6 Gibbs Derivatives on Finite Groups.6.1 Definition and Properties of Gibbs Derivatives on Finite Non-Abelian Groups.6.2 Gibbs Anti-Derivative.6.3 Partial Gibbs Derivatives.6.4 Gibbs Differential Equations.6.5 Matrix Interpretation of Gibbs Derivatives.6.6 Fast Algorithms for Calculation of Gibbs Derivatives on Finite Groups.6.6.1 Complexity of Calculation of Gibbs Derivatives.6.7 Calculation of Gibbs Derivatives Through DDs.6.7.1 Calculation of Partial Gibbs Derivatives. References.7 Linear Systems on Finite Non-Abelian Groups.7.1 Linear Shift-Invariant Systems on Groups.7.2 Linear Shift-Invariant Systems on Finite Non-Abelian Groups.7.3 Gibbs Derivatives and Linear Systems.7.3.1 Discussion.References.8 Hilbert Transform on Finite Groups.8.1 Some Results of Fourier Analysis on Finite Non-Abelian Groups.8.2 Hilbert Transform on Finite Non-Abelian Groups.8.3 Hilbert Transform in Finite Fields.References.Index.

RADOMIR S. STANKOVIC, PhD, is Professor, Department of Computer Science, Faculty of Electronics, University of Nis, Serbia. CLAUDIO MORAGA, PhD, is Professor, Department of Computer Science, Dortmund University, Germany.JAAKKO T. ASTOLA, PhD, is Professor, Institute of Signal Processing, Tampere University of Technology, Finland.

"…a concise monograph about the algebraic structures theory used in the Fourier analysis of signals and systems…useful for applied mathematicians and for engineers…" (Computing Reviews.com, November 3, 2005)

• Preface. Acknowledgments.Acronyms.1 Signals and Their Mathematical Models.1.1 Systems.1.2 Signals.1.3 Mathematical Models of Signals.References.2 Fourier Analysis.2.1 Representations of Groups.2.1.1 Complete Reducibility.2.2 Fourier Transform on Finite Groups.2.3 Properties of the Fourier Transform.2.4 Matrix Interpretation of the Fourier Transform on Finite Non-Abelian Groups.2.5 Fast Fourier Transform on Finite Non-Abelian Groups.References.3 Matrix Interpretation of the FFT.3.1 Matrix Interpretation of FFT on Finite Non-Abelian Groups.3.2 Illustrative Examples.3.3 Complexity of the FFT.3.3.1 Complexity of Calculations of the FFT.3.3.2 Remarks on Programming Implememtation of FFT.3.4 FFT Through Decision Diagrams.3.4.1 Decision Diagrams.3.4.2 FFT on Finite Non-Abelian Groups Through DDs.3.4.3 MMTDs for the Fourier Spectrum.3.4.4 Complexity of DDs Calculation Methods.References.4 Optimization of Decision Diagrams.4.1 Reduction Possibilities in Decision Diagrams.4.2 Group-Theoretic Interpretation of DD.4.3 Fourier Decision Diagrams.4.3.1 Fourier Decision Trees.4.3.2 Fourier Decision Diagrams.4.4 Discussion of Different Decompositions.4.4.1 Algorithm for Optimization of DDs.4.5 Representation of Two-Variable Function Generator.4.6 Representation of Adders by Fourier DD.4.7 Representation of Multipliers by Fourier DD.4.8 Complexity of NADD.4.9 Fourier DDs with Preprocessing.4.9.1 Matrix-valued Functions.4.9.2 Fourier Transform for Matrix-Valued Functions.4.10 Fourier Decision Trees with Preprocessing.4.11 Fourier Decision Diagrams with Preprocessing.4.12 Construction of FNAPDD.4.13 Algorithm for Construction of FNAPDD.4.13.1 Algorithm for Representation.4.14 Optimization of FNAPDD.References.5 Functional Expressions on Quaternion Groups.5.1 Fourier Expressions on Finite Dyadic Groups.5.1.1 Finite Dyadic Groups.5.2 Fourier Expressions on Q2.5.3 Arithmetic Expressions.5.4 Arithmetic Expressions from Walsh Expansions.5.5 Arithmetic Expressions on Q2.5.5.1 Arithmetic Expressions and Arithmetic-Haar Expressions.5.5.2 Arithmetic-Haar Expressions and Kronecker Expressions.5.6 Different Polarity Polynomials Expressions.5.6.1 Fixed-Polarity Fourier Expressions in C(Q2).5.6.2 Fixed-Polarity Arithmetic-Haar Expressions.5.7 Calculation of the Arithmetic-Haar Coefficients.5.7.1 FFT-like Algorithm.5.7.2 Calculation of Arithmetic-Haar Coefficients Through Decision Diagrams.References.6 Gibbs Derivatives on Finite Groups.6.1 Definition and Properties of Gibbs Derivatives on Finite Non-Abelian Groups.6.2 Gibbs Anti-Derivative.6.3 Partial Gibbs Derivatives.6.4 Gibbs Differential Equations.6.5 Matrix Interpretation of Gibbs Derivatives.6.6 Fast Algorithms for Calculation of Gibbs Derivatives on Finite Groups.6.6.1 Complexity of Calculation of Gibbs Derivatives.6.7 Calculation of Gibbs Derivatives Through DDs.6.7.1 Calculation of Partial Gibbs Derivatives. References.7 Linear Systems on Finite Non-Abelian Groups.7.1 Linear Shift-Invariant Systems on Groups.7.2 Linear Shift-Invariant Systems on Finite Non-Abelian Groups.7.3 Gibbs Derivatives and Linear Systems.7.3.1 Discussion.References.8 Hilbert Transform on Finite Groups.8.1 Some Results of Fourier Analysis on Finite Non-Abelian Groups.8.2 Hilbert Transform on Finite Non-Abelian Groups.8.3 Hilbert Transform in Finite Fields.References.Index.

RADOMIR S. STANKOVIC, PhD, is Professor, Department of Computer Science, Faculty of Electronics, University of Nis, Serbia. CLAUDIO MORAGA, PhD, is Professor, Department of Computer Science, Dortmund University, Germany.JAAKKO T. ASTOLA, PhD, is Professor, Institute of Signal Processing, Tampere University of Technology, Finland.

"…a concise monograph about the algebraic structures theory used in the Fourier analysis of signals and systems…useful for applied mathematicians and for engineers…" (Computing Reviews.com, November 3, 2005)

• Preface. Acknowledgments.Acronyms.1 Signals and Their Mathematical Models.1.1 Systems.1.2 Signals.1.3 Mathematical Models of Signals.References.2 Fourier Analysis.2.1 Representations of Groups.2.1.1 Complete Reducibility.2.2 Fourier Transform on Finite Groups.2.3 Properties of the Fourier Transform.2.4 Matrix Interpretation of the Fourier Transform on Finite Non-Abelian Groups.2.5 Fast Fourier Transform on Finite Non-Abelian Groups.References.3 Matrix Interpretation of the FFT.3.1 Matrix Interpretation of FFT on Finite Non-Abelian Groups.3.2 Illustrative Examples.3.3 Complexity of the FFT.3.3.1 Complexity of Calculations of the FFT.3.3.2 Remarks on Programming Implememtation of FFT.3.4 FFT Through Decision Diagrams.3.4.1 Decision Diagrams.3.4.2 FFT on Finite Non-Abelian Groups Through DDs.3.4.3 MMTDs for the Fourier Spectrum.3.4.4 Complexity of DDs Calculation Methods.References.4 Optimization of Decision Diagrams.4.1 Reduction Possibilities in Decision Diagrams.4.2 Group-Theoretic Interpretation of DD.4.3 Fourier Decision Diagrams.4.3.1 Fourier Decision Trees.4.3.2 Fourier Decision Diagrams.4.4 Discussion of Different Decompositions.4.4.1 Algorithm for Optimization of DDs.4.5 Representation of Two-Variable Function Generator.4.6 Representation of Adders by Fourier DD.4.7 Representation of Multipliers by Fourier DD.4.8 Complexity of NADD.4.9 Fourier DDs with Preprocessing.4.9.1 Matrix-valued Functions.4.9.2 Fourier Transform for Matrix-Valued Functions.4.10 Fourier Decision Trees with Preprocessing.4.11 Fourier Decision Diagrams with Preprocessing.4.12 Construction of FNAPDD.4.13 Algorithm for Construction of FNAPDD.4.13.1 Algorithm for Representation.4.14 Optimization of FNAPDD.References.5 Functional Expressions on Quaternion Groups.5.1 Fourier Expressions on Finite Dyadic Groups.5.1.1 Finite Dyadic Groups.5.2 Fourier Expressions on Q2.5.3 Arithmetic Expressions.5.4 Arithmetic Expressions from Walsh Expansions.5.5 Arithmetic Expressions on Q2.5.5.1 Arithmetic Expressions and Arithmetic-Haar Expressions.5.5.2 Arithmetic-Haar Expressions and Kronecker Expressions.5.6 Different Polarity Polynomials Expressions.5.6.1 Fixed-Polarity Fourier Expressions in C(Q2).5.6.2 Fixed-Polarity Arithmetic-Haar Expressions.5.7 Calculation of the Arithmetic-Haar Coefficients.5.7.1 FFT-like Algorithm.5.7.2 Calculation of Arithmetic-Haar Coefficients Through Decision Diagrams.References.6 Gibbs Derivatives on Finite Groups.6.1 Definition and Properties of Gibbs Derivatives on Finite Non-Abelian Groups.6.2 Gibbs Anti-Derivative.6.3 Partial Gibbs Derivatives.6.4 Gibbs Differential Equations.6.5 Matrix Interpretation of Gibbs Derivatives.6.6 Fast Algorithms for Calculation of Gibbs Derivatives on Finite Groups.6.6.1 Complexity of Calculation of Gibbs Derivatives.6.7 Calculation of Gibbs Derivatives Through DDs.6.7.1 Calculation of Partial Gibbs Derivatives. References.7 Linear Systems on Finite Non-Abelian Groups.7.1 Linear Shift-Invariant Systems on Groups.7.2 Linear Shift-Invariant Systems on Finite Non-Abelian Groups.7.3 Gibbs Derivatives and Linear Systems.7.3.1 Discussion.References.8 Hilbert Transform on Finite Groups.8.1 Some Results of Fourier Analysis on Finite Non-Abelian Groups.8.2 Hilbert Transform on Finite Non-Abelian Groups.8.3 Hilbert Transform in Finite Fields.References.Index.