Ideal structure of the silver code

  • Authors:
  • Avik Ray;K. Vinodh;G. Rekaya-Ben Othman;P. V. Kuma

  • Affiliations:
  • Dept. of ECE, Indian Institute of Science, Bangalore, India;Dept. of ECE, Indian Institute of Science, Bangalore, India;Ecole Nationale Superieure des Telecommunications, Paris, France;Dept. of ECE, Indian Institute of Science, Bangalore, India

  • Venue:
  • ISIT'09 Proceedings of the 2009 IEEE international conference on Symposium on Information Theory - Volume 4
  • Year:
  • 2009

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Abstract

The Silver code has captured a lot of attention in the recent past, because of its nice structure and fast decodability. In their recent paper, Hollanti et al. show that the Silver code forms a subset of the natural order of a particular cyclic division algebra (CDA). In this paper, the algebraic structure of this subset is characterized. It is shown that the Silver code is not an ideal in the natural order but a right ideal generated by two elements in a particular order of this CDA. The exact minimum determinant of the normalized Silver code is computed using the ideal structure of the code. The construction of Silver code is then extended to CDAs over other number fields.