Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The PAPR Problem in OFDM Transmission: New Directions for a Long-Lasting
  Problem   Peak power control for multicarrier communications has been a long-lasting
problem in signal processing and communications. However, industry and academia
are confronted with new challenges regarding energy efficient system design.
Particularly, the envisioned boost in network energy efficiency (e.g. at least
by a factor of 1000 in the Green Touch consortium) will tighten the
requirements on component level so that the efficiency gap with respect to
single-carrier transmission must considerably diminish. This paper reflects
these challenges together with a unified framework and new directions in this
field. The combination of large deviation theory, de-randomization and selected
elements of Banach space geometry will offer a novel approach and will provide
ideas and concepts for researchers with a background in industry as well as
those from academia.

4
The categories of this paper are: cond-mat
24
The categories of this paper are: dg-ga
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys