Digital Signal Processing

Digital Signal Processing

Signal must be describe 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 implement using DSP. 

Introduction :
1. Discrete time signals and systems :

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

What is system ?
A system is defined as the entity that operate 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 their 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 linear phase.

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

3. Z transform :

What is Z transform  ?
The Z transform has a real and imaginary parts like Fourier transform. A plot of imaginary part versus real part is called as 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 region of convergence of X(Z) is set for all the values of Z for which X(Z)  attains a finite values. Everytime 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