Articles | Volume 26, issue 8
Ann. Geophys., 26, 2237–2243, 2008
https://doi.org/10.5194/angeo-26-2237-2008

Special issue: 13th International EISCAT Workshop

Ann. Geophys., 26, 2237–2243, 2008
https://doi.org/10.5194/angeo-26-2237-2008

  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.