Energy-efficient Integrated Sensing and Communication System and DNLFM Waveform
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arXiv
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| Auteurs principaux: | , , , , , |
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| Format: | Preprint |
| Publié: |
2023
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| _version_ | 1866929607908786176 |
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| author | Ma, Yihua Yuan, Zhifeng Xia, Shuqiang Bai, Chen Wang, Zhongbin Wang, Yuxin |
| author_facet | Ma, Yihua Yuan, Zhifeng Xia, Shuqiang Bai, Chen Wang, Zhongbin Wang, Yuxin |
| contents | Integrated sensing and communication (ISAC) is a key enabler of 6G. Unlike communication radio links, the sensing signal requires to experience round trips from many scatters. Therefore, sensing is more power-sensitive and faces a severer multi-target interference. In this paper, the ISAC system employs dedicated sensing signals, which can be reused as the communication reference signal. This paper proposes to add time-frequency matched windows at both the transmitting and receiving sides, which avoids mismatch loss and increases energy efficiency. Discrete non-linear frequency modulation (DNLFM) is further proposed to achieve both time-domain constant modulus and frequency-domain arbitrary windowing weights. DNLFM uses very few Newton iterations and a simple geometrically-equivalent method to generate, which greatly reduces the complex numerical integral in the conventional method. Moreover, the spatial-domain matched window is proposed to achieve low sidelobes. The simulation results show that the proposed methods gain a higher energy efficiency than conventional methods. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2309_09415 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Energy-efficient Integrated Sensing and Communication System and DNLFM Waveform Ma, Yihua Yuan, Zhifeng Xia, Shuqiang Bai, Chen Wang, Zhongbin Wang, Yuxin Signal Processing Integrated sensing and communication (ISAC) is a key enabler of 6G. Unlike communication radio links, the sensing signal requires to experience round trips from many scatters. Therefore, sensing is more power-sensitive and faces a severer multi-target interference. In this paper, the ISAC system employs dedicated sensing signals, which can be reused as the communication reference signal. This paper proposes to add time-frequency matched windows at both the transmitting and receiving sides, which avoids mismatch loss and increases energy efficiency. Discrete non-linear frequency modulation (DNLFM) is further proposed to achieve both time-domain constant modulus and frequency-domain arbitrary windowing weights. DNLFM uses very few Newton iterations and a simple geometrically-equivalent method to generate, which greatly reduces the complex numerical integral in the conventional method. Moreover, the spatial-domain matched window is proposed to achieve low sidelobes. The simulation results show that the proposed methods gain a higher energy efficiency than conventional methods. |
| title | Energy-efficient Integrated Sensing and Communication System and DNLFM Waveform |
| topic | Signal Processing |
| url | https://arxiv.org/abs/2309.09415 |