Identification and practical validation of spectrally efficient non-orthogonal frequency shaping waveform
Abstract Signal waveform is the basic physical layer element that fundamentally determines the most important key performance indicator in communication systems, namely spectral efficiency. Traditional waveforms rely on orthogonal Nyquist shaping but result in restricted spectral efficiency. Non-ort...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-08-01
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| Series: | Communications Engineering |
| Online Access: | https://doi.org/10.1038/s44172-023-00108-w |
| _version_ | 1797199410738757632 |
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| author | Tongyang Xu Izzat Darwazeh |
| author_facet | Tongyang Xu Izzat Darwazeh |
| author_sort | Tongyang Xu |
| collection | DOAJ |
| description | Abstract Signal waveform is the basic physical layer element that fundamentally determines the most important key performance indicator in communication systems, namely spectral efficiency. Traditional waveforms rely on orthogonal Nyquist shaping but result in restricted spectral efficiency. Non-orthogonal waveforms have been proposed to enhance spectral efficiency via compressing either time or frequency resources. However, beyond 25% efficiency improvements in this way, classical Mazo theory states that performance will start to degrade. Here we use a robust and low-complexity neural network modulator to create asymmetric sub-carrier shapes, for multi-carrier non-orthogonal frequency shaping (NOFS) signals. The result is a non-Nyquist waveform which achieves 150% spectral efficiency improvement and still operates well with simple receiver processing. We set up a hardware communication link with over-the-air image transmission that practically validates the spectral efficiency improvement. This spectral efficiency will save communication resources for future communications systems such as 6G services. |
| first_indexed | 2024-03-10T17:45:06Z |
| format | Article |
| id | doaj.art-9726bfe93f394931b306274922ba1a19 |
| institution | Directory Open Access Journal |
| issn | 2731-3395 |
| language | English |
| last_indexed | 2024-04-24T07:15:19Z |
| publishDate | 2023-08-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Communications Engineering |
| spelling | doaj.art-9726bfe93f394931b306274922ba1a192024-04-21T11:20:28ZengNature PortfolioCommunications Engineering2731-33952023-08-012111310.1038/s44172-023-00108-wIdentification and practical validation of spectrally efficient non-orthogonal frequency shaping waveformTongyang Xu0Izzat Darwazeh1School of Engineering, Newcastle UniversityDepartment of Electronic and Electrical Engineering, University College LondonAbstract Signal waveform is the basic physical layer element that fundamentally determines the most important key performance indicator in communication systems, namely spectral efficiency. Traditional waveforms rely on orthogonal Nyquist shaping but result in restricted spectral efficiency. Non-orthogonal waveforms have been proposed to enhance spectral efficiency via compressing either time or frequency resources. However, beyond 25% efficiency improvements in this way, classical Mazo theory states that performance will start to degrade. Here we use a robust and low-complexity neural network modulator to create asymmetric sub-carrier shapes, for multi-carrier non-orthogonal frequency shaping (NOFS) signals. The result is a non-Nyquist waveform which achieves 150% spectral efficiency improvement and still operates well with simple receiver processing. We set up a hardware communication link with over-the-air image transmission that practically validates the spectral efficiency improvement. This spectral efficiency will save communication resources for future communications systems such as 6G services.https://doi.org/10.1038/s44172-023-00108-w |
| spellingShingle | Tongyang Xu Izzat Darwazeh Identification and practical validation of spectrally efficient non-orthogonal frequency shaping waveform Communications Engineering |
| title | Identification and practical validation of spectrally efficient non-orthogonal frequency shaping waveform |
| title_full | Identification and practical validation of spectrally efficient non-orthogonal frequency shaping waveform |
| title_fullStr | Identification and practical validation of spectrally efficient non-orthogonal frequency shaping waveform |
| title_full_unstemmed | Identification and practical validation of spectrally efficient non-orthogonal frequency shaping waveform |
| title_short | Identification and practical validation of spectrally efficient non-orthogonal frequency shaping waveform |
| title_sort | identification and practical validation of spectrally efficient non orthogonal frequency shaping waveform |
| url | https://doi.org/10.1038/s44172-023-00108-w |
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