Lele Wang, Young-Han Kim, Chiao-Yi Chen, Hosung Park, and Eren Şaşoğlu
IEEE Transactions on Information Theory, vol. 66, no. 6, pp. 3293–3316, June 2020.
Preliminary results appeared in Proceedings of IEEE International Symposium on Information Theory, pp. 2749–2753, Honolulu, Hawaii, July 2014.
A low-complexity coding scheme is developed to achieve the rate region of maximum likelihood decoding for interference channels. As in the classical rate-splitting multiple access scheme by Grant, Urbanke, and Whiting, the proposed coding scheme uses superposition of multiple codewords with successive cancellation decoding, which can be implemented using standard point-to-point encoders and decoders. Unlike rate-splitting multiple access, which is not rate-optimal for multiple receivers, the proposed coding scheme transmits codewords over multiple blocks in a staggered manner and recovers them successively over sliding decoding windows, achieving the single-stream optimal rate region as well as the more general Han–Kobayashi inner bound for the two-user interference channel. The feasibility of this scheme in practice is verified by implementing it using commercial channel codes over the two-user Gaussian interference channel.