# Binary polynomial division (R2022b)

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Fabian Glutz 2022 年 12 月 14 日

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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### 回答 (1 件)

Sai 2022 年 12 月 28 日
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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