Digital Signal Processing

Digital Signal Processing

A signal must be described as a function of one or more independent variables. Digital signal processing take real-world signal like audio, video, pressure, voice that have been digitized and then mathematically manipulate them. Mathematical processing algorithm can be easily implemented using DSP. 

Introduction :
1. Discrete-time signals and systems :

What is the signal?
signal is basically an electrical or electromagnetic current that is used for carrying data from one device or network to another.

What is the system?
A system is defined as the entity that operates one or more signals to accomplish a function, to produce new signals. Read more 

2. Digital filter :

Digital filter types :
Digital filter can be classified in several different groups but there are two major types of digital filter are to be FIR and IIR. 

FIR filter basics :
FIR filter stands for Finite impulse response, It is a digital filter used in digital signal processing application. FIR filter can be easily designed to be in the linear phase.

IIR filter basics :
IIR filter is one of the two primary types of digital filter. It is a very important part of digital signal processing application Read more

3. Z transform :

What is the Z transform?
The Z transform has a real and imaginary part like Fourier transform. A plot of imaginary part versus the real part is called a Z plane or complex Z plane.

Properties of Z transform :
1. Linearity 2. Time shifting 3. Scaling 4. Time reversal 

Z transform ROC :
The ROC stands for a region of convergence of X(Z) is set for all the values of Z for which X(Z)  attains a finite value. Every time when we find Z transform we must indicate its ROC
Read more

4. Discrete Fourier transform


What is DFT?
DFT stands for Discrete Fourier transform, it is a finite duration frequency sequence which is obtained by sampling one period of Fourier transform. Sampling is done at 'N' equally spaced points, over the period extending from o to  2π.

Properties of DFT 
1. Linearity 2. Time shifting 3.  
3. Conjugation 4. Time Reversal Read more