Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Advanced service data provisioning in ROF-based mobile
  backhauls/fronthauls   A new cost-efficient concept to realize a real-time monitoring of
quality-of-service metrics and other service data in 5G and beyond access
network using a separate return channel based on a vertical cavity surface
emitting laser in the optical injection locked mode that simultaneously
operates as an optical transmitter and as a resonant cavity enhanced
photodetector, is proposed and discussed. The feasibility and efficiency of the
proposed approach are confirmed by a proof-of-concept experiment when optically
transceiving high-speed digital signal with multi-position quadrature amplitude
modulation of a radio-frequency carrier.

30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
2
The categories of this paper are: math