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arXiv 2211.04540eess.SPcs.ITmath.IT
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采用空间路径索引调制通信的毫米波雷达波束成形

Millimeter-Wave Radar Beamforming with Spatial Path Index Modulation Communications

Ahmet M. Elbir, Kumar Vijay Mishra, Abdulkadir Çelik, Ahmed M. Eltawil

AI总结:

针对B5G毫米波混合波束成形复用增益损失问题,提出融合空间路径索引调制的ISAC方法,低复杂度设计雷达与通信专用波束成形器,在频谱效率和波束方向图上性能优于传统方案。

摘要:

为高效利用无线频谱并节省硬件成本,第五代及以后(B5G)无线网络设想采用集成感知与通信(ISAC)范式以共享频谱。在B5G系统中,通常采用混合波束成形器以避免昂贵的硬件,这类波束成形器使用更少的射频链路,但会以复用增益为代价。近期已有研究提出通过空间路径索引调制(SPIM)来克服毫米波(mmWave)混合波束成形器的这一缺陷,SPIM对基站与用户之间的空间路径进行调制,可提升频谱效率。本文提出一种用于混合波束成形的SPIM-ISAC方法,可同时生成指向雷达目标和通信用户的波束。我们提出了一种低复杂度的混合波束成形器设计方法,这类波束成形器包含仅雷达波束成形器和仅通信波束成形器。数值实验表明,我们的SPIM-ISAC方法在频谱效率和生成的波束方向图方面,相较于传统的mmWave-ISAC设计展现出显著的性能提升。

英文摘要:

To efficiently utilize the wireless spectrum and save hardware costs, the fifth generation and beyond (B5G) wireless networks envisage integrated sensing and communications (ISAC) paradigms to jointly access the spectrum. In B5G systems, the expensive hardware is usually avoided by employing hybrid beamformers that employ fewer radio-frequency chains but at the cost of the multiplexing gain. Recently, it has been proposed to overcome this shortcoming of millimeter wave (mmWave) hybrid beamformers through spatial path index modulation (SPIM), which modulates the spatial paths between the base station and users and improves spectral efficiency. In this paper, we propose an SPIM-ISAC approach for hybrid beamforming to simultaneously generate beams toward both radar targets and communications users. We introduce a low complexity approach for the design of hybrid beamformers, which include radar-only and communications-only beamformers. Numerical experiments demonstrate that our SPIM-ISAC approach exhibits a significant performance improvement over the conventional mmWave-ISAC design in terms of spectral efficiency and the generated beampattern.

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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