This paper investigates the use of non-coherent communication techniques for open-loop transmission over temporally-correlated Rayleigh-fading MIMO channels. These techniques perform data detection without knowing the instantaneous channel coefficients. Three non-coherent Multiple Input Multiple Output (MIMO) schemes, namely, differential unitary space-time modulation, differential space-time block code, and Grassmannian signaling, are compared with several state-of-the-art training-based coherent schemes. This paper shows that the non-coherent schemes are meaningful alternatives to training-based communication, specially as the number of transmit antennas increases. In particular, for more than two transmit antennas, non-coherent communication provides a clear advantage in medium to high mobility scenarios.

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Keywords differential space-time block code, differential unitary space time modulation, Grassmannian signaling, MIMO, Non-coherent communications, temporal correlation
Persistent URL
Journal IEEE Access
Cabrejas, J. (Jorge), Roger, S. (Sandra), Calabuig, D. (Daniel), Fouad, Y.M.M. (Yaser M. M.), Gohary, R, Monserrat, J.F. (Jose F.), & Yanikömeroǧlu, H. (2016). Non-Coherent Open-Loop MIMO Communications over Temporally-Correlated Channels. IEEE Access, 4, 6161–6170. doi:10.1109/ACCESS.2016.2580680