Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Photonics-assisted wideband RF self-interference cancellation with
  digital domain amplitude and delay pre-matching   A photonics-based digital and analog self-interference cancellation approach
for in-band full-duplex communication systems and frequency-modulated
continuous-wave radar systems is reported. One dual-drive Mach-Zehnder
modulator is used to implement the analog self-interference cancellation by
pre-adjusting the delay and amplitude of the reference signal applied to the
dual-drive Mach-Zehnder modulator in the digital domain. The amplitude is
determined via the received signal power, while the delay is searched by the
cross-correlation and bisection methods. Furthermore, recursive least squared
or normalized least mean square algorithms are used to suppress the residual
self-interference in the digital domain. Quadrature phase-shift keying
modulated signals and linearly frequency-modulated signals are used to
experimentally verify the proposed method. The analog cancellation depth is
around 20 dB, and the total cancellation depth is more than 36 dB for the
2-Gbaud quadrature phase-shift keying modulated signals. For the linearly
frequency-modulated signals, the analog and total cancellation depths are
around 19 dB and 34 dB, respectively.

17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga