International journal of advanced smart convergence

The Institute of Internet, Broadcasting and Communication (한국인터넷방송통신학회)
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Performance of Channel Estimation in Two-Dimensional Modulation System

  • Nguyen, Quoc Kien (Department of Electrical and Information Engineering, Seoul National University of Science and Technology) ;
  • Jeon, Taehyun (Department of Electrical and Information Engineering, Seoul National University of Science and Technology)
  • Received : 2020.07.11
  • Accepted : 2020.07.23
  • Published : 2020.09.30
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Abstract

Orthogonal time frequency space (OTFS) modulation is considered as one of the solutions to cope with high mobility channel environments. It converts the time-varying channel to the near-constant channel response in the delay-Doppler domain. This modulation scheme also benefits from the diversity in two-dimensional modulation. According to recent researches, this method outperforms the conventional OFDM modulation, especially in high-speed channel conditions. In this paper, to investigate the performance of OTFS in a practical system, channel estimation in the delay-Doppler domain is compared with the conventional method in the time-frequency domain at different mobile speeds. Simulation results confirm that the delay-Doppler domain channel estimation brings a better performance compared to the conventional one under the same overhead rate.

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References

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