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[Discuss-gnuradio] Scrambler Mask, Seed and Lenght

From: Thanasis Balafoutis
Subject: [Discuss-gnuradio] Scrambler Mask, Seed and Lenght
Date: Fri, 15 May 2015 09:24:55 +0300


the default values for the parameters of the scrambler block are the following:
Mask: 0x8A
Seed: 0x7F

Is this a 7-bit scrambler? If yes, why the mask corresponds to an 8-bit number? (0x8A = '10001010')
What is the polynomial that corresponds to this mask?
According to this link (which I found as reference): http://wiki.spench.net/wiki/GNU_Radio_Notes#GLFSR_Source

the mask 0x8A is related with the polynomial x^8+x^4+x^2+1

Is that correct? Do I miss something or is there an error on default values?

Thank you!

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