CODEWITHSUNDEEP
matlab
Animo
Animo

Reputation: 63

Does the MatLab Galois Field function have an inverse?

If I have a normal matrix A that I convert to a GF(2) using the MatLab gf function to produce a GF(2) object A_g and then perform operations on A_g like FEC encoding and reshaping to produce B_g can I easily convert B_g to a normal matrix object B using some inverse function of gf
Something like this:

A = [0, 1, 1, 0]
A_g = gf(A)

B_g = bchenc(dataIn, 7, 4);

B = gfinv(B_g) % does gfinv exist?
% now do digital modulation on B

Upvotes: 1

Views: 158

Answers (2)

Animo
Animo

Reputation: 63

I came across another much simpler solution as follows:

B = B_g.x;

Upvotes: 0

Animo
Animo

Reputation: 63

I managed to convert B_g to B by iterating over each element in the Galois array as follows:

    [rows, cols] = size(B_g); % get dimensions of B_g
    B = zeros(rows, cols); % declare B with same dimensions
    for row = 1:rows
        rowGF = B_g(row,:);
        for col = 1: cols
           if (rowGF(col)/1) == 1 % if the element is 1 then set to 1
               B(row, col) = 1;
           elseif (rowGF(col)/1) == 0 % if the element is 0 then set to 0
               B(row, col) = 0;
           end
        end
    end

Not sure if there's an inbuilt way of doing this, but this is good enough.

Upvotes: 1

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