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arXiv 2602.02248eess.SPcs.ITmath.IT
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一种基于正交时延-多普勒分割复用的新型ISAC波形

A Novel ISAC Waveform Based on Orthogonal Delay-Doppler Division Multiplexing with FMCW

University of New South Wales(新南威尔士大学);Shanghai Jiao Tong University(上海交通大学)

Kehan Huang, Akram Shafie, Min Qiu, Elias Aboutanios, Jinhong Yuan

AI总结:

本文提出了一种基于正交时延-多普勒分割复用的新型ISAC波形,通过改进的FMCW波形实现低PAPR的高效集成感知与通信。

摘要:

在本文中,我们提出了一种基于频率调制连续波(FMCW)的正交时延-多普勒分割复用(ODDM)调制(ODDM-FMCW)波形,以实现低峰均功率比(PAPR)的集成感知与通信(ISAC)。我们首先提出了一种平方根-奈奎斯特滤波FMCW(SRN-FMCW)波形,以解决传统线性FMCW波形在ISAC系统中的局限性。为了更好地与ODDM集成,我们通过在时延-多普勒(DD)域中嵌入符号生成SRN-FMCW,称为DD-SRN-FMCW帧。设计了一种DD拍频压缩接收机以高效获得信道响应。接下来,我们通过将DD-SRN-FMCW帧叠加到ODDM数据帧上,构建了所提出的ODDM-FMCW波形用于ISAC。对所提出的ODDM-FMCW波形进行了全面的性能分析,涵盖了峰均功率比、频谱、模糊函数以及延迟和多普勒估计的Cramer-Rao界。数值结果表明,所提出的ODDM-FMCW波形在感知的均方误差和通信的误码率方面表现出色。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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