Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Iterative Detection and Phase-Noise Compensation for Coded Multichannel
  Optical Transmission   The problem of phase-noise compensation for correlated phase noise in coded
multichannel optical transmission is investigated. To that end, a simple
multichannel phase-noise model is considered and the maximum a posteriori
detector for this model is approximated using two frameworks, namely factor
graphs (FGs) combined with the sum-product algorithm (SPA), and a variational
Bayesian (VB) inference method. The resulting pilot-aided algorithms perform
iterative phase-noise compensation in cooperation with a decoder, using
extended Kalman smoothing to estimate the a posteriori phase-noise distribution
jointly for all channels. The system model and the proposed algorithms are
verified using experimental data obtained from space-division multiplexed
multicore-fiber transmission. Through Monte Carlo simulations, the algorithms
are further evaluated in terms of phase-noise tolerance for coded transmission.
It is observed that they significantly outperform the conventional approach to
phase-noise compensation in the optical literature. Moreover, the FG/SPA
framework performs similarly or better than the VB framework in terms of
phase-noise tolerance of the resulting algorithms, for a slightly higher
computational complexity.

29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess