Applications of TCM with σ-tree constellations over the AWGN channel
M.Y. Zaidan, Christopher F. Barnes, Stephen B. Wicker · 2002
/spl sigma/-trees are a class of geometric structures that include lattices as a constrained special case. These structures allow for signal sets that are more spherical in shape than lattices in spaces of arbitrary dimensionality. The use of /spl sigma/-trees in the construction of non-lattice TCM codes is established and investigated.