Xu, T;
Darwazeh, I;
(2025)
NOFS: A Non-Orthogonal Frequency Shaping Waveform to Break the Fast-OFDM Limit.
In:
2025 31st International Conference on Telecommunications (ICT).
IEEE: Budva, Montenegro.
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Abstract
We innovate a novel over-the-air signal waveform termed non-orthogonal frequency shaping (NOFS), aiming for artificial intelligence air interface for future 6 G communications. By reshaping sub-carriers using irregular Sinc (irSinc) patterns, the proposed NOFS waveform effectively reduces bandwidth and exhibits asymmetric shaping characteristics. The unique irSinc pattern empowers NOFS to utilize twodimensional modulation schemes beyond the Fast-OFDM limit, where previously only one-dimensional modulation formats were applicable. Moreover, NOFS demonstrates robustness in the beyond-Fast-OFDM regime, offering 150 % improvement in energy and spectral efficiency. Additionally, the explainable nature of the neural network used in the NOFS waveform design provides insights into the signal patterns, enhancing transparency and trust in the system. Finally, an over-theair signal transmission is operated in hardware validating the effectiveness of NOFS waveforms in real-world.
| Type: | Proceedings paper |
|---|---|
| Title: | NOFS: A Non-Orthogonal Frequency Shaping Waveform to Break the Fast-OFDM Limit |
| Event: | 2025 31st International Conference on Telecommunications (ICT) |
| Location: | MONTENEGRO, Budva |
| Dates: | 28 Apr 2025 - 29 Apr 2025 |
| ISBN-13: | 979-8-3315-1448-8 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/ICT65093.2025.11046296 |
| Publisher version: | https://doi.org/10.1109/ict65093.2025.11046296 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Technology, Telecommunications, Waveform, non-orthogonal, NOFS, 6G, spectral efficiency, irregular Sinc, irSinc, prototyping |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10217843 |
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