Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Low SNR Capacity of Fading Channels with Peak and Average Power
  Constraints   Flat-fading channels that are correlated in time are considered under peak
and average power constraints. For discrete-time channels, a new upper bound on
the capacity per unit time is derived. A low SNR analysis of a full-scattering
vector channel is used to derive a complimentary lower bound. Together, these
bounds allow us to identify the exact scaling of channel capacity for a fixed
peak to average ratio, as the average power converges to zero. The upper bound
is also asymptotically tight as the average power converges to zero for a fixed
peak power.
  For a continuous time infinite bandwidth channel, Viterbi identified the
capacity for M-FSK modulation. Recently, Zhang and Laneman showed that the
capacity can be achieved with non-bursty signaling (QPSK). An additional
contribution of this paper is to obtain similar results under peak and average
power constraints.

24
The categories of this paper are: dg-ga
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The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
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The categories of this paper are: hep-lat
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The categories of this paper are: nucl-ex
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The categories of this paper are: solv-int
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The categories of this paper are: cond-mat
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The categories of this paper are: nucl-th
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The categories of this paper are: quant-ph
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The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
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The categories of this paper are: acc-phys