Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Application of Error Backpropagation to the Background
  Calibration of Time Interleaved ADC for Digital Communication Receivers   This paper introduces a backpropagation-based technique for the calibration
of the mismatch errors of time-interleaved analog to digital converters
(TI-ADCs). This technique is applicable to digital receivers such as those used
in coherent optical communications. The error at the slicer of the receiver is
processed using a modified version of the well known backpropagation algorithm
from machine learning. The processed slicer error can be directly applied to
compensate the TI-ADC mismatch errors with an adaptive equalizer, or it can be
used to digitally estimate and correct said mismatch errors using analog
techniques such as delay cells and programmable gain amplifiers (PGA). The main
advantages of the technique proposed here compared to prior art are its
robustness, its speed of convergence, and the fact that it always works in
background mode, independently of the oversampling factor and the properties of
the input signal, as long as the receiver converges. Moreover, this technique
enables the joint compensation of impairments not addressed by traditional
TI-ADC calibration techniques, such as I/Q skew in quadrature modulation
receivers. Simulations are presented to demonstrate the effectiveness of the
technique, and low complexity implementation options are discussed.

34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
3
The categories of this paper are: physics