Detail publikace

Channel estimation method for OFDM in low SNR based on two-dimensional spreading

Originální název

Channel estimation method for OFDM in low SNR based on two-dimensional spreading

Anglický název

Channel estimation method for OFDM in low SNR based on two-dimensional spreading

Jazyk

en

Originální abstrakt

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.

Anglický abstrakt

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.

BibTex


@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",
  annote="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.",
  chapter="107020",
  doi="10.1007/s11277-014-1779-y",
  howpublished="print",
  number="78",
  volume="2014",
  year="2014",
  month="may",
  pages="715--728",
  type="journal article"
}