A Novel ISAC Waveform Based on Orthogonal Delay-Doppler Division Multiplexing with FMCW
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866912868664868864 |
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| author | Huang, Kehan Shafie, Akram Qiu, Min Aboutanios, Elias Yuan, Jinhong |
| author_facet | Huang, Kehan Shafie, Akram Qiu, Min Aboutanios, Elias Yuan, Jinhong |
| contents | In this work, we propose the orthogonal delay-Doppler (DD) division multiplexing (ODDM) modulation with frequency modulated continuous wave (FMCW) (ODDM-FMCW) waveform to enable integrated sensing and communication (ISAC) with a low peak-to-average power ratio (PAPR). We first propose a square-root-Nyquist-filtered FMCW (SRN-FMCW) waveform to address limitations of conventional linear FMCW waveforms in ISAC systems. To better integrate with ODDM, we generate SRN-FMCW by embedding symbols in the DD domain, referred to as a DD-SRN-FMCW frame. A DD chirp compression receiver is designed to obtain the channel response efficiently. Next, we construct the proposed ODDM-FMCW waveform for ISAC by superimposing a DD-SRN-FMCW frame onto an ODDM data frame. A comprehensive performance analysis of the ODDM-FMCW waveform is presented, covering peak-to-average power ratio, spectrum, ambiguity function, and Cramer-Rao bound for delay and Doppler estimation. Numerical results show that the proposed ODDM-FMCW waveform delivers excellent ISAC performance in terms of root mean square error for sensing and bit error rate for communications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_02248 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | A Novel ISAC Waveform Based on Orthogonal Delay-Doppler Division Multiplexing with FMCW Huang, Kehan Shafie, Akram Qiu, Min Aboutanios, Elias Yuan, Jinhong Signal Processing Information Theory In this work, we propose the orthogonal delay-Doppler (DD) division multiplexing (ODDM) modulation with frequency modulated continuous wave (FMCW) (ODDM-FMCW) waveform to enable integrated sensing and communication (ISAC) with a low peak-to-average power ratio (PAPR). We first propose a square-root-Nyquist-filtered FMCW (SRN-FMCW) waveform to address limitations of conventional linear FMCW waveforms in ISAC systems. To better integrate with ODDM, we generate SRN-FMCW by embedding symbols in the DD domain, referred to as a DD-SRN-FMCW frame. A DD chirp compression receiver is designed to obtain the channel response efficiently. Next, we construct the proposed ODDM-FMCW waveform for ISAC by superimposing a DD-SRN-FMCW frame onto an ODDM data frame. A comprehensive performance analysis of the ODDM-FMCW waveform is presented, covering peak-to-average power ratio, spectrum, ambiguity function, and Cramer-Rao bound for delay and Doppler estimation. Numerical results show that the proposed ODDM-FMCW waveform delivers excellent ISAC performance in terms of root mean square error for sensing and bit error rate for communications. |
| title | A Novel ISAC Waveform Based on Orthogonal Delay-Doppler Division Multiplexing with FMCW |
| topic | Signal Processing Information Theory |
| url | https://arxiv.org/abs/2602.02248 |