Time-Frequency Warped Waveforms for Well-Contained Massive Machine Type Communications

Ibrahim M., ARSLAN H., Çırpan H. A., Ekin S.

IEEE Journal on Selected Areas in Communications, vol.41, no.6, pp.1900-1917, 2023 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 41 Issue: 6
  • Publication Date: 2023
  • Doi Number: 10.1109/jsac.2023.3275622
  • Journal Name: IEEE Journal on Selected Areas in Communications
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Applied Science & Technology Source, Communication Abstracts, Compendex, Computer & Applied Sciences, INSPEC, Metadex, MLA - Modern Language Association Database, zbMATH, Civil Engineering Abstracts
  • Page Numbers: pp.1900-1917
  • Keywords: 6G and beyond, IoT, massive machine-type communication, mMTC, time-frequency warping, waveform
  • Istanbul Medipol University Affiliated: Yes


This paper proposes a novel time-frequency warped waveform for short symbols, massive machine-type communication (mMTC), and internet of things (IoT) applications. The waveform is composed of asymmetric raised cosine (RC) pulses to increase the signal containment in time and frequency domains. The waveform has low power tails in the time domain, hence better performance in the presence of delay spread and time offsets. The time-axis warping unitary transform is applied to control the waveform occupancy in time-frequency space and to compensate for the usage of high roll-off factor pulses at the symbol edges. The paper explains a step-by-step analysis for determining the roll-off factors profile and the warping functions. Gains are presented over the conventional Zero-tail Discrete Fourier Transform-spread-Orthogonal Frequency Division Multiplexing (ZT-DFT-s-OFDM), and Cyclic prefix (CP) DFT-s-OFDM schemes in the simulations section.