4.1 Introduction4.2 Definition of a Linear System4.3 LTI System Response Function h(t)4.4 Convolution4.5 Determining h(t) in an Unknown System4.6 Causality4.7 Combined Systems4.8 Convolution and Random Numbers4.9 Useful Hints and Help with MATLAB4.10 Chapter Summary4.11 Conclusions4.12 Worked Problems4.13 End of Chapter ExercisesBibliographyNotes