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arXiv 2309.09415eess.SP
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高能效集成感知与通信系统及DNLFM波形

Energy-efficient Integrated Sensing and Communication System and DNLFM Waveform

Yihua Ma, Zhifeng Yuan, Shuqiang Xia, Chen Bai, Zhongbin Wang, Yuxin Wang

AI总结:

针对ISAC感知功率敏感及多目标干扰问题,提出发射接收双端时频匹配窗、DNLFM波形及空域匹配窗方法,提升能效并降低计算复杂度,仿真验证其优于传统方法。

摘要:

集成感知与通信(ISAC)是6G的关键使能技术。与通信无线链路不同,感知信号需经历来自众多散射体的往返传输,因此感知对功率更敏感,且面临更严重的多目标干扰。本文中,ISAC系统采用专用感知信号,该信号可复用为通信参考信号。本文提出在发射端和接收端均添加时频匹配窗,以避免失配损耗并提高能效。进一步提出离散非线性频率调制(DNLFM)波形,实现时域恒模与频域任意窗权值。DNLFM仅需极少牛顿迭代和简单几何等效方法生成,大幅减少传统方法中的复杂数值积分。此外,提出空域匹配窗以实现低旁瓣。仿真结果表明,所提方法比传统方法具有更高能效。

英文摘要:

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.

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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