Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Degrees of Freedom of Generic Block-Fading MIMO Channels without A
  Priori Channel State Information   We studynthe high-SNR capacity of generic 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.

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The categories of this paper are: bayes-an
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The categories of this paper are: chem-ph
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The categories of this paper are: stat
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The categories of this paper are: cmp-lg
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The categories of this paper are: eess
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The categories of this paper are: dg-ga
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The categories of this paper are: quant-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: nlin
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The categories of this paper are: cond-mat
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The categories of this paper are: chao-dyn
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The categories of this paper are: acc-phys
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-th
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The categories of this paper are: hep-lat
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The categories of this paper are: q-fin