Result Details
Channel estimation method for OFDM in low SNR based on two-dimensional spreading
Maršálek Roman, prof. Ing., Ph.D., UREL (FEEC)
Fedra Zbyněk, Ing., Ph.D.
Prokeš Aleš, prof. Ing., Ph.D., TKO-SIX (FEEC), UREL (FEEC)
Mecklenbräuker Christoph, Prof. Ing. Dipl.-Ing. Dr.-Ing., UREL (FEEC)
In this paper, we present a channel estimation method based on
two-dimensional signal spreading applicable to Orthogonal Frequency Multi-
ple Access (OFDM) multicarrier systems. Our method exploits a spreading
of a transmitted data signal as well as a pilot signal over the assigned fre-
quency range and time period. As a spreading sequence we exploited orthog-
onal Walsh-Hadamard sequences.
When compared with traditional pilot symbol based channel estimation,
our method is beneficial in low Signal to Noise Ratio (SNR).
For a comparison of our method with state-of-the-art channel estimation
method, we utilized an open source LTE downlink simulator developed at TU
Vienna. This enables a reproducibility of our results. Considering the LTE
system, our method outperforms the traditional approach in typical range of
SNR from -5 dB to 10 dB. For a comparison of a throughput performance, a
number of channel models has been employed.
Channel estimation, LTE, 2D signal spreading, OFDM
@article{BUT107020,
author="Jiří {Blumenstein} and Roman {Maršálek} and Zbyněk {Fedra} and Aleš {Prokeš} and Christoph {Mecklenbräuker}",
title="Channel estimation method for OFDM in low SNR based on two-dimensional spreading",
journal="WIRELESS PERSONAL COMMUNICATIONS",
year="2014",
volume="2014",
number="78",
pages="715--728",
doi="10.1007/s11277-014-1779-y",
issn="0929-6212"
}