Two-Dimensional Weight-Constrained Codes for Crossbar Resistive Memory Arrays

Abstract

This letter proposes novel methods for designing two-dimensional (2-D) weight-constrained codes for reducing the parasitic currents in the crossbar resistive memory array. In particular, we present efficient encoding/decoding algorithms for capacity-approaching 2-D weight-constrained codes of size m×n , where each row has a weight pn with p<1/2 ; and each column has a weight qm with q≤1/2 . We show that the designed codes provide higher code rates compared to the prior art codes for p≤1/2 and q≤1/2 .