Publications in Scientific Journals:
J. Blumenstein, R. Marsalek, Z. Fedra, A. Prokes, C. Mecklenbräuker:
"Channel estimation method for OFDM in low SNR based on two-dimensional spreading";
Wireless Personal Communications,
In this paper, we present a channel estimation method based on two-dimensional signal spreading applicable to Orthogonal Frequency Multiple Access (OFDM) multicarrier systems. Our method exploits a spreading of a transmitted data signal as well as a pilot signal over the assigned frequency range and time period. As a spreading sequence we exploited orthogonal 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
"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
Project Head Christoph Mecklenbräuker:
Christian Doppler Lab "Funktechnologien für nachhaltige Mobilität"
Created from the Publication Database of the Vienna University of Technology.