Using Scrambler

Hi,I want to use the scrambling polynomial: 1 + X^12 + X^17. This means
the currentlytransmitted bit is the EXOR of the current data bit, plus
the bits thatwere transmitted 12 and 17 bits earlier.But I’m not sure
what are the suitable values for Mask and Seed for the gnuradio Scramble
Block.Any help will be appreciated.
ThanksDaniel

Hi again, a question on the same subject.
Gnuradio has 2 blocks for scrambling “Scrambler” and “Additive
Scrambler” but only one block for descrambling.I suppose the
“Descrambler” grc block corresponds to the “Scrambler” block.How can I
descramble messages that are scrambled with the “Additive Scrambler”
block?Do I have to write my own block?

Thank youDaniel

 On Tuesday, December 23, 2014 11:48 AM, Daniel B. 

[email protected] wrote:

Hi,I want to use the scrambling polynomial: 1 + X^12 + X^17. This means
the currentlytransmitted bit is the EXOR of the current data bit, plus
the bits thatwere transmitted 12 and 17 bits earlier.But I’m not sure
what are the suitable values for Mask and Seed for the gnuradio Scramble
Block.Any help will be appreciated.
ThanksDaniel