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A Transformation From the Fibonacci to the Galois NLFSRs

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1 Author(s)
Dubrova, E. ; R. Inst. of Technol. (KTH), Stockholm, Sweden

Conventional nonlinear feedback shift registers (NLFSRs) use the Fibonacci configuration in which the feedback is applied to the last bit only. In this paper, we show how to transform a Fibonacci NLFSR into an equivalent NLFSR in the Galois configuration, in which the feedback can be applied to every bit. Such a transformation can potentially reduce the depth of the circuits implementing feedback functions, thus decreasing the propagation time and increasing the throughput.

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Information Theory, IEEE Transactions on  (Volume:55 ,  Issue: 11 )