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On the linear complexity of nonlinearly filtered PN-sequences

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2 Author(s)
Kolokotronis, N. ; Dept. of Informatics & Telecommun., Nat. & Kapodistrian Univ. of Athens, Greece ; Kalouptsidis, N.

Binary sequences of period 2n-1 generated by a linear feedback shift register (LFSR) whose stages are filtered by a nonlinear function, f, are studied. New iterative formulas are derived for the calculation of the linear complexity of the output sequences. It is shown that these tools provide an efficient mechanism for controlling the linear complexity of the nonlinearly filtered maximal-length sequences.

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Information Theory, IEEE Transactions on  (Volume:49 ,  Issue: 11 )