Coordinate Interleaved Faster-than-Nyquist Signaling

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ÇİÇEK A., ÇAVUŞ E., Bedeer E., Marsland I., Yanikomeroglu H.

IEEE Communications Letters, vol.27, no.1, pp.229-233, 2023 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 27 Issue: 1
  • Publication Date: 2023
  • Doi Number: 10.1109/lcomm.2022.3212074
  • Journal Name: IEEE Communications Letters
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, PASCAL, Aerospace Database, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Page Numbers: pp.229-233
  • Keywords: Symbols, Binary phase shift keying, Detectors, Receivers, Transmitters, Interference, Maximum likelihood estimation, Coordinate interleaving, constructive inter-symbol interference, low-complexity detection, faster-than-Nyquist
  • Ankara Yıldırım Beyazıt University Affiliated: No

Abstract

IEEEFaster-than-Nyquist (FTN) signaling is an attractive transmission technique which accelerates data symbols beyond the Nyquist rate to improve the spectral efficiency; however, at the expense of higher computational complexity to remove the introduced intersymbol interference (ISI). In this work, we introduce a novel FTN signaling transmission technique, named coordinate interleaved FTN (CI-FTN) signaling that exploits the ISI at the transmitter to generate constructive interference for every pair of the counter-clockwise rotated binary phase shift keying (BPSK) data symbols. In particular, the proposed CI-FTN signaling interleaves the in-phase (I) and the quadrature (Q) components of the counter-clockwise rotated BPSK symbols to guarantee that every pair of consecutive symbols has the same sign, and hence, has constructive ISI. At the receiver, we propose a low-complexity detector that makes use of the constructive ISI introduced at the transmitter. Simulation results show the merits of the CI-FTN signaling and the proposed low-complexity detector compared to conventional Nyquist and FTN signaling.