2.1 Discrete-time LTI Systems : The Convolution Sum （卷积和） 2.1.1 The Representation of Discrete-Time Signals in Terms of impulses

3.1 3.13 3.15 3.34 3.35

6.23 Shown in Figure 6.23 is for a lowpass filter. Determine and sketch the impulse response of the filter for each of the following phase characteristics:

4.3 4.4 4.10 4.11 4.14 4.15 4.24 4.25 4.32 4.35 4.36 4.37 4.43

1. Continuous-time system 2. Discrete-time system

6.1 The Magnitude-Phase Representation （ 幅度-相位） of the Fourier Transform

Let be a band-limited signal with then is uniquely determined by its samples if where

9.1 The Laplace Transform 1. The relationship 2. Region of Convergence（收敛域）

4.1 Representation of Aperiodic Signals :The Continuous-Time Fourier Transform

作业： 1.14 1.15 1.16 1.17 1.21 (d) (e) (f) 1.22 (d) (g) 1.23 1.24 (a) (b) 1.26 (a) (b) 1.27 1.31