# Binary polynomial division (R2022b)

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Fabian Glutz el 14 de Dic. de 2022
Respondida: Sai el 28 de Dic. de 2022
I want to divide 2 binary polynomials with matlab.
As in the attached picture.
I have the following code, but unfortunately this does not work because it does not calculate binary.
g = poly2sym([1 0 1 1]);
x = poly2sym([1 0 0 0])
u1 = poly2sym([1 0 0 0])
[q,r] = deconv(sym2poly(x *u1) ,sym2poly(g))
How could I do this?
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### Respuestas (1)

Sai el 28 de Dic. de 2022
I understand that you are trying to perform Binary Polynomial Division (Modulo Division of Polynomials). To get the expected result, gfdeconv command should be used instead of deconv with some modifications in writing polynomials as shown
g = x^3 + x + 1 = 1 + x + x^3 = [1 1 0 1]
The following code snippet helps you for better understanding of using the command
g = [1 1 0 1] % g = 1 + x + x^3
gfpretty(g)
x1 = [0 0 0 1] % x1 = x^3
gfpretty(x1)
u1 = [0 0 0 1] % u1 = x^3
gfpretty(u1)
[q,r] = gfdeconv(conv(x1,u1) ,g) %q -> queotient, r -> remainder
gfpretty(q)
gfpretty(r)
Hope the query is resolved.
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