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Publications in Scientific Journals:

G. Koliander, E. Riegler, G. Durisi, F. Hlawatsch:
"Degrees of Freedom of Generic Block-Fading MIMO Channels Without a Priori Channel State Information";
IEEE Transactions on Information Theory, 60 (2014), 12; 7760 - 7781.



English abstract:
We study the high-signal-to-noise-ratio capacity of generic multiple-input multiple-output (MIMO) Rayleigh block-fading channels in the noncoherent setting where neither transmitter nor receiver has a priori channel state information but both are aware of the channel statistics. In contrast to the well-established constant block-fading model, we allow the fading to vary within each block with a temporal correlation that is generic (in the sense used in the interference-alignment literature). We show that the number of degrees of freedom of a generic MIMO Rayleigh block-fading channel with T transmit antennas and block length N is given by T(1 - 1/N) provided that T <; N and the number of receive antennas is at least T(N - 1)/(N - T). A comparison with the constant block-fading channel (where the fading is constant within each block) shows that, for large block lengths, generic correlation increases the number of degrees of freedom by a factor of up to four.

Keywords:
Block-fading channels, capacity pre-log, channel capacity, channel state information, degrees of freedom, MIMO, noncoherent communication, OFDM


"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
http://dx.doi.org/10.1109/TIT.2014.2362931

Electronic version of the publication:
http://publik.tuwien.ac.at/files/PubDat_235093.pdf


Created from the Publication Database of the Vienna University of Technology.