Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Novel Massive MIMO Channel Sounding Data Applied to Deep Learning-based
  Indoor Positioning   With a significant increase in area throughput, Massive MIMO has become an
enabling technology for fifth generation (5G) wireless mobile communication
systems. Although prototypes were built, an openly available dataset for
channel impulse responses to verify assumptions, e.g. regarding channel
sparsity, is not yet available. In this paper, we introduce a novel channel
sounder architecture, capable of measuring multiantenna and multi-subcarrier
channel state information (CSI) at different frequency bands, antenna
geometries and propagation environments. The channel sounder has been verified
by evaluation of channel data from first measurements. Such datasets can be
used to study various deep-learning (DL) techniques in different applications,
e.g., for indoor user positioning in three dimensions, as is done in this
paper. Not only we do achieve an accuracy better than 75 cm for line of sight
(LoS), as is comparable to state-of-the-art conventional positioning
techniques, but also obtain similar precision for the more challenging case of
non-line of sight (NLoS). Further extensive indoor/outdoor measurement
campaigns will provide a more comprehensive open CSI dataset, tagged with
positions, for the scientific community to further test various algorithms.

23
The categories of this paper are: solv-int
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat