Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comparison of computing efficiency among FFT, CZT and Zoom FFT in
  THz-TDS   A study of alternative transforms to FFT in order to compare their potential
to enhance resolution and computation time in the framework of THz time domain
spectroscopy (THz-TDS) instruments is carried out. Both from simulated and
experimental data it is shown that, as expected, resolution cannot be enhanced
using CZT or Zoom FFT and, in terms of computing efficiency, FFT is in
practical cases, the most efficient one.

26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs