"4"^^ . "0929-6212" . . "Channel estimation method for OFDM in low SNR based on two-dimensional spreading"@en . "[E560C08EA32F]" . "2014" . "Blumenstein, Ji\u0159\u00ED" . . "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."@en . "5"^^ . "14"^^ . "Proke\u0161, Ale\u0161" . "WIRELESS PERSONAL COMMUNICATIONS" . "78" . . "Channel estimation method for OFDM in low SNR based on two-dimensional spreading"@en . "26220" . "RIV/00216305:26220/14:PU108679" . . "Mecklenbr\u00E4uker, Christoph" . . . . "Fedra, Zbyn\u011Bk" . . "Channel estimation method for OFDM in low SNR based on two-dimensional spreading" . . . "Mecklenbr\u00E4uker, Christoph" . . . . "Mar\u0161\u00E1lek, Roman" . . . . "NL - Nizozemsko" . . "6857" . "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." . . . "P(LD12006), S" . "Channel estimation, LTE, 2D signal spreading, OFDM"@en . "RIV/00216305:26220/14:PU108679!RIV15-MSM-26220___" . "Channel estimation method for OFDM in low SNR based on two-dimensional spreading" .