Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: 5G Waveforms for Overlay D2D Communications: Effects of Time-Frequency
  Misalignment   This paper analyses a scenario where a Device-To-Device (D2D) pair coexists
with an Orthogonal Frequency Division Multiplexing (OFDM) based incumbent
network. D2D transmitter communicates in parts of spectrum left free by
cellular users, while respecting a given spectral mask. The D2D pair is
misaligned in time and frequency with the cellular users. Furthermore, the D2D
pair utilizes alternative waveforms to OFDM proposed for 5G. In this study, we
show that it is not worth synchronising the D2D pair in time with respect to
the cellular users. Indeed, the interference injected into the incumbent
network has small variations with respect to time misalignment. We provide
interference tables that encompass both time and frequency misalignment. We use
them to analyse the maximum rate achievable by the D2D pair when it uses
different waveforms. Then, we present numerical results showing what waveform
should be utilized by the D2D pair according to the time-frequency resources
that are not used by the incumbent network. Our results show that the delay
induced by linearly convolved waveforms make them hardly applicable to short
time windows, but that they dominate OFDM for long transmissions, mainly in the
case where cellular users are very sensitive to interference.

14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th