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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 26, issue 8
Ann. Geophys., 26, 2237–2243, 2008
https://doi.org/10.5194/angeo-26-2237-2008
© Author(s) 2008. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: 13th International EISCAT Workshop

Ann. Geophys., 26, 2237–2243, 2008
https://doi.org/10.5194/angeo-26-2237-2008
© Author(s) 2008. This work is distributed under
the Creative Commons Attribution 3.0 License.

  05 Aug 2008

05 Aug 2008

Polyphase alternating codes

M. Markkanen1, J. Vierinen2, and J. Markkanen3 M. Markkanen et al.
  • 1Eigenor Corporation, Lompolontie 1, 99600 Sodanykylä, Finland
  • 2Sodankylä Geophysical Obervatory, Tähteläntie 62, 99600 Sodankylä, Finland
  • 3EISCAT Scientific Association, Tähteläntie 54B, 99600 Sodankylä, Finland

Abstract. We present a new class of alternating codes. Instead of the customary binary phase codes, the new codes utilize either p or p–1 phases, where p is a prime number. The first class of codes has code length pm, where m is a positive integer, the second class has code length p–1. We give an actual construction algorithm, and explain the principles behind it. We handle a few specific examples in detail. The new codes offer an enlarged collection of code lengths for radar experiments.

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