Chapter 2 Discrete-time signals and systems 2.1 Discrete-time signals sequences 2.2 Discrete-time system 2.3 Frequency-domain representation of discrete-time signal and system1 2.3 Frequency-domain representation of discrete-time signal and system Chapter 2 Discrete-time signals and systems 2.1 Discrete-time signals:sequences 2.2 Discrete-time system