Sum-MSE Gain of DFT-Based Channel Estimator Over Frequency-Domain LS One in Full-Duplex OFDM Systems; IEEE Systems Journal; Vol. 13, iss. 2

Sum-MSE Gain of DFT-Based Channel Estimator Over Frequency-Domain LS One in Full-Duplex OFDM Systems; IEEE Systems Journal; Vol. 13, iss. 2

Bibliographic Details
Parent link:IEEE Systems Journal
Vol. 13, iss. 2.— 2019.— [P. 1231-1240]
Corporate Author: Национальный исследовательский Томский политехнический университет Инженерная школа информационных технологий и робототехники
Other Authors: Wang Jin, Yyu Khay, Shu Feng, Lyu Dzhu Bo, Chen Riding, Li Dzhun, Dzhayakodi Arachshiladzh D. N. K. Dushanta Nalin Kumara
Summary:Title screen
In this paper, we make an investigation on the summean-square-error (Sum-MSE) performance gain in full-duplex orthogonal frequency-division multiplexing (OFDM) systems in the presence of colored interference-plus-noise (IPN). This gain is defined as the ratio of Sum-MSE of frequency-domain least-square (LS) channel estimator to that of DFT-based LS one. The closed-form formula of the gain is derived. And, its simple upper and lower bounds are given using inequalities of matrix eigenvalues. The exact value of Sum-MSE gain depends heavily on the correlation factor of the IPN covariance matrix. More importantly, we also find that the Sum-MSE performance gain grows from 1 to N/L as the correlation factor gradually decreases from 1 to 0, where N and L denote the number of total subcarrier and the length of cyclic prefix, respectively. Also, via theoretical analysis, the exact Sum-MSE gain degenerates into 1 and N/L in two extreme scenarios: fully-correlated and white, respectively. The former 1 means there is no performance gain, while the latter N/L corresponds to the maximum Sum-MSE performance gain achievable. Numerical simulation further validates the above results. Additionally, the derived lower bound is shown to be closer to the exact value of Sum-MSE gain compared to the upper bound.
Режим доступа: по договору с организацией-держателем ресурса
Language:English
Published: 2019
Subjects:
труды учёных ТПУ
электронный ресурс
channel estimation
OFDM
performance gain
frequency-domain analysis
covariance matrices
linear matrix inequalities
frequency division multiplexing
Online Access:https://doi.org/10.1109/JSYST.2018.2850934
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=664215

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