A lower bound of the form (2n/n+1)1/nγn-1/n n-1 is derived on the coding gain γn of the densest n-dimensional (n-D) lattice(s). The bound is obtained based on constructing an n-D lattice which consists of parallel layers. Each layer is selected as a translated version of a densest (n - 1)-D lattice. The relative positioning of the layers is adjusted to make the coding gain as large as possible. For large values of n, the bound is improved through tightening Ryškov's inequality on covering radius and minimum distance of a lattice.

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Keywords Coding gain, Covering radius, Densest lattices, Lattice sphere packing, Minimum distance
Persistent URL dx.doi.org/10.1023/A:1008288001941
Journal Designs, Codes and Cryptography
Banihashemi, A, & Khandani, A.K. (Amir K.). (1998). An Inequality on the Coding Gain of Densest Lattice Packings in Successive Dimensions. Designs, Codes and Cryptography, 14(3), 207–212. doi:10.1023/A:1008288001941