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Shael

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This app contains the all below topics in a very good and maintained ways.
1- Introduction of Signals and system
2- Classification of Signals
4- General Signal Characteristics 
5- Operation on signals
6- Fundamentals of Systems 
7- System properties
8- Linear Time Invariant System
9- Properties of LTI Systems, Casual systems 
10- Fourier Representations  
11- Frequency Response of LTI Systems
12- Fourier Transform representation for Periodic and discrete time Signals 
13- Sampling
14-  Reconstruction
15-  Discrete Time Processing of Continuous Time Signals
16-  Fourier Series representation for finite duration Nonperiodic signals
17-  Modulation Types and Benefits
18-  Full Amplitude Modulation
19-  Pulse Amplitude Modulation
20-  Multiplexing
21-  Phase and Group delays
22- Representation of Signals using Continuous time Complex Exponentials: Laplace Transform
23- Unilateral Laplace Transform, its inversion 
24- Laplace Transform Properties
25- Representation of Signals using Discrete time Complex Exponentials: The Z-Transform
26- Properties of Region of convergence
27- Inverse Z-Transform
28-  Z-Transform Properties
29-  Transform Analysis of LTI Systems

signals and systems I

Latest Version of signals and systems I