A Novel Cyclic Prefix Configuration for Enhanced Reliability and Spectral Efficiency in OTFS Systems

Zegrar S. E., ARSLAN H.

IEEE Wireless Communications Letters, cilt.12, sa.5, ss.888-892, 2023 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 12 Sayı: 5
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1109/lwc.2023.3247893
  • Dergi Adı: IEEE Wireless Communications Letters
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex, INSPEC
  • Sayfa Sayıları: ss.888-892
  • Anahtar Kelimeler: cyclic prefix, delay-Doppler domain, OTFS
  • İstanbul Medipol Üniversitesi Adresli: Evet

Özet

In practical transmission, orthogonal time-frequency-space (OTFS) is implemented using different prefix configurations including reduced-cyclic prefix (RCP) and full-CP (FCP). This letter presents a novel OTFS structure, which is a modification of the FCP structure in OTFS modulation. The proposed approach leverages the FCP structure in the delay-Doppler domain to decode the information in the CP block rather than discarding it at the receiver to enhance the system performance. This is validated via simulations in terms of the reduction in channel estimation overhead as well as the improved signal-to-noise ratio (SNR) of the received signal.