A coded modulation scheme with interblock memory

A bstract-In this paper, we propose a coded modulationi scheme with interblock memory. The proposed scheme has a multi-stage coding structure. However, at some coding stage, the coding designs for every two adjacent blocks are related. Compared to coded modulation schemes for which each block is independent of the others, the introduction of interblock coding provides us with additional flexibility in the design. In this way, for the proposed scheme, we can achieve large minimum Euclidean distance while the number of nearest neighbors is not too large. We also design a multi-stage decoding algorithm, which is optimum in each stage and has low decoding complexity. Three specific examples are provided to demonstrate the advantages of the proposed scheme.