In this paper, we consider the design of multi-resolution non-coherent multiple-input multiple-output (MIMO) systems that enable Unequal Error Protection (UEP). A method for designing multi-layer non-coherent Grassmannian constellations is introduced. Specifically, the proposed method yields multi-layer constellations that are amenable to a natural set partitioning strategy. The resulting subsets from such partitioning are used to encode the more protected symbols. On the other hand, the less protected symbols are mapped to points within these subsets. Furthermore, we present two methods to establish the link between the gain of the more protected layer and the design parameters of this construction. Finally, we exploit the underlying structure to develop a sequential decoding approach. Numerical results suggest that employing such decoding scheme leads to computational savings with respect to the optimal decoding while maintaining comparable performance.

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Conference 2017 IEEE International Conference on Communications, ICC 2017
Attiah, K.M. (Kareem M.), Seddik, K. (Karim), Gohary, R, & Yanikömeroǧlu, H. (2017). Non-coherent multi-layer constellations for unequal error protection. In IEEE International Conference on Communications. doi:10.1109/ICC.2017.7997060