Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Achievable Rates and Training Overheads for a Measured LOS Massive MIMO
  Channel   This paper presents achievable uplink (UL) sumrate predictions for a measured
line-of-sight (LOS) massive multiple-input, multiple-output (MIMO) (MMIMO)
scenario and illustrates the trade-off between spatial multiplexing performance
and channel de-coherence rate for an increasing number of base station (BS)
antennas. In addition, an orthogonal frequency division multiplexing (OFDM)
case study is formed which considers the 90% coherence time to evaluate the
impact of MMIMO channel training overheads in high-speed LOS scenarios. It is
shown that whilst 25% of the achievable zero-forcing (ZF) sumrate is lost when
the resounding interval is increased by a factor of 4, the OFDM training
overheads for a 100-antenna MMIMO BS using an LTE-like physical layer could be
as low as 2% for a terminal speed of 90m/s.

18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph