Built from simple shift-registers with a small. If $\alpha z$ is a multiset permutation where $z$ is an element of the multiset, then $\alpha$ is said to be a shorthand multiset permutation with $z$ as the missing (redundant) symbol. 2 2 Linear Feedback Shift Registers (LFSRs) These are n-bit counters exhibiting pseudo-random behavior. the new content (the feedback bit) of the stage would be obtained by xor-ing a subset of the content of the m stages. ![]() the content of stage i is shifted to stage, for 3. Complementing Cycling Register (CCR): $f(\alpha) = a_1 \oplus 1 = \overline$, and for binary strings with fixed-weight the content consists of $w$ 1s and $n-w$ 0s. (the content of stage 0) forms part of the output 2.Pure Cycling Register (PCR): $f(\alpha) = a_1$.
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