New pairs of m-sequences with 4-level cross-correlation

  • Authors:
  • Tor Helleseth;Petri Rosendahl

  • Affiliations:
  • Department of Informatics, University of Bergen, Hoyteknologisenteret, N-5020 Bergen, Norway;Department of Informatics, University of Bergen, Hoyteknologisenteret, N-5020 Bergen, Norway

  • Venue:
  • Finite Fields and Their Applications
  • Year:
  • 2005

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Abstract

Let @w be a primitive element of GF(2^n), where n=0(mod4). Let d=(2^2^k+2^s^+^1-2^k^+^1-1)/(2^s-1), where n=2k, and s is such that 2s divides k. We prove that the binary m-sequences s(t)=tr(@w^t) and s(dt) have a four-level cross-correlation function and give the distribution of the values.