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Degrees of Freedom of Generic Block-Fading MIMO Channels Without a Priori Channel State Information

G. Koliander ; E. Riegler ; Giuseppe Durisi (Institutionen för signaler och system, Kommunikationssystem) ; F. Hlawatsch
Ieee Transactions on Information Theory (0018-9448). Vol. 60 (2014), 12, p. 7760-7781.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Block-fading channels, capacity pre-log, channel capacity, channel state information, degrees of freedom; MIMO; noncoherent

Denna post skapades 2014-12-30. Senast ändrad 2016-02-10.
CPL Pubid: 209217


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Institutionen för signaler och system, Kommunikationssystem (1900-2017)



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