论文标题
用于集成通信和传感应用的梁空间主动传感方案
A Beam-Space Active Sensing Scheme for Integrated Communication and Sensing Applications
论文作者
论文摘要
在本文中，我们为采用逼真的混合数字纳学（HDA）体系结构制定了毫米波（MMWave）频段集成感测和通信（ISAC）系统的主动传感策略。为了保持所需的SNR级别，必须在数据传输之前建立初始梁采集（BA）。在考虑的设置中，一个基站（BS）TX通过数字调制波形传输数据，并共同确定的雷达接收器同时从反向散射信号中执行雷达估计。在此BA方案中，单个公共数据流在宽角度扇区上广播，以便雷达接收器可以检测尚未获得的用户的存在并执行粗略的参数估计（到达角度，飞行时间和多普勒）。由于HDA结构，我们考虑了雷达接收器的多块自适应RF-DOMAN“还原矩阵”（从天线到RF链）的设计，以实现在角度域中的勘探能力与光束形成模式的方向性之间的妥协。我们的数值结果表明，所提出的方法能够可靠地检测到多个目标，同时显着减少了初始获取时间。
In this paper, we develop an active sensing strategy for a millimeter wave (mmWave) band Integrated Sensing and Communication (ISAC) system adopting a realistic hybrid digital-analog (HDA) architecture. To maintain a desired SNR level, initial beam acquisition (BA) must be established prior to data transmission. In the considered setup, a Base Station (BS) Tx transmits data via a digitally modulated waveform and a co-located radar receiver simultaneously performs radar estimation from the backscattered signal. In this BA scheme, a single common data stream is broadcast over a wide angular sector such that the radar receiver can detect the presence of not yet acquired users and perform coarse parameter estimation (angle of arrival, time of flight, and Doppler). As a result of the HDA architecture, we consider the design of multi-block adaptive RF-domain 'reduction matrices' (from antennas to RF chains) at the radar receiver, to achieve a compromise between the exploration capability in the angular domain and the directivity of the beamforming patterns. Our numerical results demonstrate that the proposed approach is able to reliably detect multiple targets while significantly reducing the initial acquisition time.
