Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Zero-Crossing Waveform Interferometry: an Alternative to Correlation in
  Signal Processing   It is shown that multiple representations (such as replicas or Hilbert
transforms) of a random waveform can interfere constructively to form a compact
pattern, akin to a wave packet, when the representations are created in
synchrony with zero crossings of the waveform. A function of such 'engineered'
zero-crossing interferograms can exhibit time-delay resolution superior to that
associated with a conventional correlation function, especially for waveforms
with slowly-decaying power spectra. A phenomenon of local slew rate at zero
crossings is exploited to substantially reduce the Cram\'er-Rao bound on
time-delay estimators. A system, based on a concept of elapsed time, is
proposed to determine zero-crossing interferograms in real time.

14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
4
The categories of this paper are: cond-mat