Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Codebook-Based Limited Feedback System for Large-Scale MIMO   In this paper, we consider limited feedback systems for FDD large-scale
(massive) MIMO. A new codebook-based framework for multiuser (MU) MIMO downlink
systems is introduced and then compared with an ideal non-codebook based
system. We are particularly interested in the less-known finite-rate feedback
regime where the number $M$ of transmit antennas and the number of users are of
the same order of magnitude and $M$ is large but finite, which is a typical
scenario of large-scale MIMO. We provide new findings in this regime and
identify some benefits of the new framework in terms of scheduling gain and
downlink dedicated pilot overhead.

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The categories of this paper are: hep-ex
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The categories of this paper are: chao-dyn
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The categories of this paper are: nucl-th
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The categories of this paper are: cond-mat
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The categories of this paper are: gr-qc
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The categories of this paper are: q-fin
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The categories of this paper are: patt-sol
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The categories of this paper are: supr-con
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The categories of this paper are: physics
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The categories of this paper are: bayes-an
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The categories of this paper are: q-alg
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The categories of this paper are: alg-geom
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The categories of this paper are: astro-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: stat
23
The categories of this paper are: solv-int