Presentation Information

11:15 AM - 11:30 AM JST(2:15 AM - 2:30 AM UTC)Candidate for Academic Incentive Award

[B-5A-09]OFDM Channel Estimation Using Delay-Doppler Superimposed Pilot in High-Mobility Environments

◎Tetsuya Arakawa¹, Toshihiko Nishimura¹, Katsuya Suto¹, Yasutaka Ogawa¹ (1. Hokkaido University)

Keywords:

OFDM,OTFS,High-Doppler,Channel Estimation

OTFS modulation has been shown to outperform OFDM in high-mobility environments, that is, high-Doppler environments. However, OTFS still faces several challenges, including the high complexity of equalization, or symbol detection, in the delay-Doppler (DD) domain, as well as the large overhead required for channel estimation because guard symbols must be placed around pilot symbols. To address these issues, this paper investigates a method that combines DD-domain channel estimation used in OTFS modulation with OFDM data transmission. The results show that the proposed method outperforms OFDM in high-Doppler environments.

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