wis scrambler vs 64/66 scrambler
In the blue book the wis scrambler is x7+x6+1, only the
6th and 7th term are xor and feedback to the beginning
of the 7-bit shift register.
However, in the 64/66PCS section x58+x19+1 is used but
this time the scrambled output xor 58th xor 19th and
feed back to the beginning of the 58-bit shift registers.
The two equations are very similar but the drawing in the
bluebook suggested otherwise. Also, base on the drawing,
the wis scrambler/descrambler would be the same while the
64/66 scrambler and descrambler are different. I must have
misunderstood some fundamental. I hope someone could clarify
this for me.
Thanks in advance.
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