The main design criteria for space-time block codes (STBCs) are the code rate, diversity order, coding gain, and low decoder complexity. In this letter, we propose a full-rate full-diversity STBC for 2 × 2 multiple-input multiple-output (MIMO) systems with a substantially lower maximum likelihood (ML) detection complexity than that of existing schemes. This makes the implementation of high-performance full-rate codes feasible for practical systems. Our numerical evaluation shows that the proposed code achieves significantly lower decoding complexity while maintaining a similar performance compared to that of existing rate-2 STBCs.
This is an author-produced, peer-reviewed version of this article. The final, definitive version of this document can be found online at IEEE Communications Letters, published by IEEE. Copyright restrictions may apply. doi: 10.1109/LCOMM.2016.2545651
Available at: http://works.bepress.com/hani_mehrpouyan/62/