Convolutional coding using transform domain approach

Language: Scilab

Processor: Not Relevant

Submitted by Senthilkumar R on Mar 28 2012

Licensed under a Creative Commons Attribution 3.0 Unported License

Convolutional coding using transform domain approach

This function is used to find convolutional encoder output using transform domain approach

function [x1D,x2D]= ConvolutionCode_TransDomain()         

//Convolutional code - Transform domain approach

//g1D =  generator polynomial 1

//g2D =  generator polynomial 2

//x1D = top output sequence polynomial

//x2D = bottom output sequence polynomial 

D = poly(0,'D');

g1D = input('Enter the generator polynomial 1=') //generator polynomial 1

g2D = input('Enter the generator polynomial 2=') //generator polynomial 2

mD = input('Enter the message sequence')//message sequence polynomial representation

x1D = g1D*mD; //top output polynomial

x2D = g2D*mD; //bottom output polynomial

x1 = coeff(x1D);

x2 = coeff(x2D);

disp(modulo(x1,2),'top output sequence')

disp(modulo(x2,2),'bottom output sequence')

endfunction

//Result

//Enter the generator polynomial 1 =  1+D+D^2

//Enter the generator polynomial 2 =  1+D^2;

//Enter the message sequence = 1+0+0+D^3+D^4;

//top output sequence   

// 

//    1.    1.    1.    1.    0.    0.    1.   

//bottom output sequence   

// 

//    1.    0.    1.    1.    1.    1.    1.  

//x2D  =

// 

//         2   3   4   5   6  

//    1 + D + D + D + D + D   

//x1D  =

// 

//             2   3    4    5   6  

//    1 + D + D + D + 2D + 2D + D

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posted by Senthilkumar R

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DSP Code Sharing > Convolutional coding using transform domain approach

Convolutional coding using transform domain approach

Convolutional coding using transform domain approach