发表机构
School of Information and Communications Engineering, Xi’an Jiaotong University; School of Computer Science & Technology, Xi’an University of Posts & Telecommunications（西安交通大学信息与通信工程学院; 西安邮电大学计算机科学与技术学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
针对压制式干扰，提出基于动态敏捷可重构智能表面天线阵列（DARISAA）的综合抗干扰方案，结合空间域预处理与数字波束成形，实现高功率干扰抑制与SINR显著提升。
AI 中文摘要
压制式干扰对无线通信中的数字接收机构成严重挑战，因为高功率干扰可能导致模数转换器（ADC）过载或自动增益控制（AGC）限制下的量化阻塞，从而削弱期望的微弱信号。空间域中的模拟波束成形可以在干扰信号到达ADC之前用于对抗压制式干扰。本文基于动态敏捷可重构智能表面天线阵列（DARISAA），提出了一种综合考虑到达方向（DoA）获取和压制式干扰消除的综合抗干扰方案。DARISAA是一种由许多超材料单元组成的新型可重构天线阵列，能够动态调整其相位响应，从而在天线端实现压制式干扰消除。利用DARISAA的动态敏捷性，基于子空间方法提出了针对干扰和期望信号的精确DoA估计方案。通过利用DARISAA的空间域预处理能力和多通道接收机的数字波束成形，开发了一种模拟（天线）-数字混合抗干扰方案，以有效抑制高功率干扰，并即使在使用低分辨率ADC的情况下也能显著提高信干噪比（SINR）。仿真结果表明，所提出的综合抗干扰方案实现了显著的SINR增强，突显了DARISAA支持的空间前端处理在干扰抑制方面的优势。
英文摘要
Suppressive jamming is a severe challenge to digital receivers in wireless communications, since high-power jamming may cause analog-to-digital converter (ADC) overload or automatic gain control (AGC)-limited quantization blocking of weak desired signals. Analog beamforming in the spatial domain can be employed to combat suppressive jamming signals before they reach the ADC. In this paper, we introduce a comprehensive anti-jamming scheme considering both direction-of-arrival (DoA) acquisition and suppressive jamming elimination based on a Dynamic Agile Reconfigurable Intelligent Surface Antenna Array (DARISAA). DARISAA is a novel type of reconfigurable antenna array composed of many metamaterial elements, which can dynamically adapt its phase responses, enabling suppressive jamming cancellation at the antenna-end. Accurate DoA estimation schemes for jamming and desired signals are proposed based on a subspace approach by utilizing the dynamic agility of the DARISAA. By leveraging the spatial-domain preprocessing capability of DARISAA and the digital beamforming of the multi-channel receiver, an analog (antenna)-digital hybrid anti-jamming scheme is developed to effectively suppress high-power jamming and significantly improve the signal-to-interference-plus-noise ratio (SINR) even with low-resolution ADCs. Simulation results demonstrate that the proposed comprehensive anti-jamming scheme achieves significant SINR enhancement, highlighting the advantages of DARISAA-enabled spatial front-end processing for jamming suppression.
