Construction $π_A$ and $π_D$ Lattices: Construction, Goodness, and Decoding Algorithms
(1506.08269)Abstract
A novel construction of lattices is proposed. This construction can be thought of as a special class of Construction A from codes over finite rings that can be represented as the Cartesian product of $L$ linear codes over $\mathbb{F}{p1},\ldots,\mathbb{F}{pL}$, respectively, and hence is referred to as Construction $\piA$. The existence of a sequence of such lattices that is good for channel coding (i.e., Poltyrev-limit achieving) under multistage decoding is shown. A new family of multilevel nested lattice codes based on Construction $\piA$ lattices is proposed and its achievable rate for the additive white Gaussian channel is analyzed. A generalization named Construction $\piD$ is also investigated which subsumes Construction A with codes over prime fields, Construction D, and Construction $\piA$ as special cases.
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