  Polar code lattices are formed from binary polar codes using Construction D.
In this paper, we propose a design technique for finite-dimension polar code
lattices. The dimension $n$ and target probability of decoding error are
parameters for this design. To select the rates of the Construction D component
codes, rather than using the capacity as in past work, we use the explicit
finite-length properties of the polar code. Under successive cancellation
decoding, density evolution allows choosing code rates that satisfy the equal
error probability rule. At an error-rate of $10^{-4}$, a dimension $n=128$
polar code lattice achieves a VNR of 2.5 dB, within 0.2 dB of the best-known
BCH code lattice, but with significantly lower decoding complexity.
