Scale-recursive lattice-based multiple-access symbol constellations

  • Authors:
  • Paul D. Fiore

  • Affiliations:
  • Lincoln Laboratory, Massachusetts Institute of Technology, Lexington, MA

  • Venue:
  • IEEE Transactions on Information Theory
  • Year:
  • 2010

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Abstract

This paper describes scale-recursive symbol constellations for the synchronous multiple-access (MA) channel, which can be seen as a generalization of Voronoi coding. The constellations are related by a fixed scaling and rotation, and are designed so that in the noise-free case, the combined signal always falls onto an appropriate lattice. This allows high throughput and a linear complexity decoding algorithm. Novel constellations of up to 24 dimensions are given that show improved performance over conventional rectangular lattices.