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arXiv 2512.04595eess.SP
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非线性电磁信号处理

Nonlinear EM-based Signal Processing

University of Bologna(博洛尼亚大学);National Laboratory of Wireless Communications (WiLab), CNIT(无线通信国家实验室(WiLab),CNIT)

Mattia Fabiani, Giulia Torcolacci, Davide Dardari

AI总结:

本文提出利用电磁域实现非线性信号处理,以减少系统复杂度和射频链数量,同时保持关键性能指标。

摘要:

高频频段的使用,结合包含极大量元件(XL-MIMO)的天线阵列,正在将当前技术推向硬件复杂度、延迟和能耗的极限。一种有前途的方法是将信号处理的一部分直接转移到电磁(EM)领域。本文研究了利用可重新配置的被动线性和非线性(NL)散射元件在信号源的反应近场中相互作用的新架构。目标是使多功能的线性和非线性电磁信号处理直接在空中发生。数值结果突显了在方向到达和位置估计等应用中,可以显著减少系统复杂度和射频链数量,同时仍能实现关键性能指标,而无需额外的模拟或数字处理。

英文摘要:

The use of high-frequency bands, combined with antenna arrays containing an extremely large number of elements (XL-MIMO), is pushing current technology to its limits in terms of hardware complexity, latency, and power consumption. A promising approach to achieving scalable and sustainable solutions is to shift part of the signal processing directly into the electromagnetic (EM) domain. In this paper, we investigate novel architectures that harness the interaction of reconfigurable passive linear and nonlinear (NL) scattering elements positioned in the reactive near field of signal sources. The objective is to enable multifunctional linear and NL EM signal processing to occur directly "over-the-air." Numerical results highlight the potential to significantly reduce both system complexity and the number of RF chains, while still achieving key performance metrics in applications such as direction-of-arrival and position estimation, without the need for additional analog or digital processing.

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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