There is the field generator polynomial for CCSDS which is
F(x) = x8 + x7 + x2 + x + 1
and the codeword generating poly, which is
g(x) = Π(j=128 – E) to (127 + E) ( x – α^11j )
From your last reply, I guess you are talking about the second. Am I right?
I dont get how you can get any number greater that 255, because all operations are "mod 256". During which operation do you get such numbers? Encoding? Decoding?
- b
Note: α^11 is chosen to make the g(x) symmetric, α^1 will also have same ECC capacity, but circuits would be slightly bigger.