Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multicell Zero-Forcing and User Scheduling on the Downlink of a Linear
  Cell Array   Coordinated base station (BS) transmission has attracted much interest for
its potential to increase the capacity of wireless networks. Yet at the same
time, the achievable sum-rate with single-cell processing (SCP) scales
optimally with the number of users under Rayleigh fading conditions. One may
therefore ask if the value of BS coordination is limited in the many-user
regime from a sum-rate perspective. With this in mind we consider multicell
zero-forcing beamforming (ZFBF) on the downlink of a linear cell-array. We
first identify the beamforming weights and the optimal scheduling policy under
a per-base power constraint. We then compare the number of users m and n
required per-cell to achieve the same mean SINR, after optimal scheduling, with
SCP and ZFBF respectively. Specifically, we show that the ratio m/n grows
logarithmically with n. Finally, we demonstrate that the gain in sum-rate
between ZFBF and SCP is significant for all practical values of number of
users.

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The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
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The categories of this paper are: dg-ga
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
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The categories of this paper are: solv-int
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The categories of this paper are: funct-an