Volume 17, Number 3

Evaluating OTFS Modulation for 6G: Impact of High Mobility and Environmental Noise

  Authors

Abderrahim Mohammadi ¹, Aziz Dkiouak ², Mostafa Baghouri ³, Saad Chakkor ¹, Ahmed EL Oualkadi ¹ and Anass El Mamouni ¹, ¹ Abdelmalek Essaadi University Tetuan, Morocco, ² Chouaib Doukkali University, Morocco, ³ University of Hassan II, Morocco

  Abstract

Orthogonal Time-frequency-space (OTFS) modulation represents a pioneering advancement tailored to the requirements of prospective sixth-generation (6G) wireless networks. The innovative design effectively addresses the challenges associated with high-frequency dispersion in wireless transmission environments, offering many advantages over traditional modulation schemes such as orthogonal frequency-division multiplexing (OFDM). OTFS stands out due to its capacity to adapt to dynamic wireless channels with high Delay-Doppler (DD) dispersion, a capability that is not present in traditional frameworks. In contrast to conventional approaches, which assume near-channel stability over an OTFS frame, OTFS modulation is well-suited to environments where the input-output relationship may vary over time due to evolving media or environmental conditions. In a comparative analysis with OFDM, OTFS exhibits superior block error rate (BLER) performance compared to the signal-to-noise ratio (SNR) across varying modulation formats, including QPSK, 16QAM, and 64QAM. Numerical simulations demonstrate that OTFS outperforms OFDM in mitigating transmission errors in diverse scenarios by exploring different reception rates for each waveform.

  Keywords

6G, DD, OTFS, OFDM, BLER, SNR.