Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Sum-MSE performance gain of DFT-based channel estimator over
  frequency-domain LS one in full-duplex OFDM systems with colored interference   In this paper, we make an investigation on the sum-mean-square-error
(sum-MSE) performance gain achieved by DFT-based least-square (LS) channel
estimator over frequency-domain LS one in full-duplex OFDM system in the
presence of colored interference and noise. The closed-form expression of the
sum-MSE performance gain is given. Its simple upper and lower bounds are
derived by using inequalities of matrix eigen-values. By simulation and
analysis, the upper lower bound is shown to be close to the exact value of MSE
gain as the ratio of the number N of total subcarriers to the cyclic prefix
length L grows and the correlation factor of colored interference increases.
More importantly, we also find that the MSE gain varies from one to N/L as the
correlation among colored interferences decreases gradually. According to
theoretical analysis, we also find the MSE gain has very simple forms in two
extreme scenarios. In the first extreme case that the colored interferences
over all subchannels are fully correlated, i.e., their covariance matrix is a
matrix of all-ones, the sum-MSE gain reduces to 1. In other words, there is no
performance gain. In the second extreme case that the colored-interference
covariance matrix is an identity matrix, i.e, they are mutually independent,
the achievable sum-MSE performance gain is N/L. A large ratio N/L will achieve
a significant sum-MSE gain.

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The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
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The categories of this paper are: quant-ph
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The categories of this paper are: adap-org
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The categories of this paper are: solv-int
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The categories of this paper are: eess
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The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph