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http://dx.doi.org/10.5909/JBE.2022.27.2.244

Detection Scheme Based on Gauss - Seidel Method for OTFS Systems  

Cha, Eunyoung (Interdisciplinary Major of Maritime AI Convergence, Department of Electronics and Communications Engineering, Korea Maritime and Ocean University)
Kim, Hyeongseok (Interdisciplinary Major of Maritime AI Convergence, Department of Electronics and Communications Engineering, Korea Maritime and Ocean University)
Ahn, Haesung (Interdisciplinary Major of Maritime AI Convergence, Department of Electronics and Communications Engineering, Korea Maritime and Ocean University)
Kwon, Seol (Interdisciplinary Major of Maritime AI Convergence, Department of Electronics and Communications Engineering, Korea Maritime and Ocean University)
Kim, Jeongchang (Interdisciplinary Major of Maritime AI Convergence, Department of Electronics and Communications Engineering, Korea Maritime and Ocean University)
Publication Information
Journal of Broadcast Engineering / v.27, no.2, 2022 , pp. 244-247 More about this Journal
Abstract
In this paper, the performance of the decoding schemes using linear MMSE filters in the frequency and time domains and the reinforcement Gauss-Seidel algorithm for the orthogonal time frequency space (OTFS) system that can improve robustness under high-speed mobile environments are compared. The reinforcement Gauss-Seidel algorithm can improve the bit error rate performance by suppressing the noise enhancement. The simulation results show that the performance of the decoding scheme using the linear MMSE filter in the frequency domain is severely degraded due to the effect of Doppler shift as the mobile speed increases. In addition, the decoding scheme using the reinforcement Gauss-Seidel algorithm under the channel environment with 120 km/h and 500 km/h speeds outperforms the decoding schemes using linear MMSE filters in the frequency and time domains.
Keywords
6G; Doppler shift; OFDM; OTFS; time-varying channel;
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