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arXiv 2402.15047cs.ITeess.SPmath.IT
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基于多域测量的网络化协同感知:架构、性能极限与算法

Networked Collaborative Sensing using Multi-domain Measurements: Architectures, Performance Limits and Algorithms

Yihua Ma, Shuqiang Xia, Chen bai, Yuxin Wang, Zhongbin Wang, Songqian Li

AI总结:

针对ISAC感知性能不及专用雷达的问题,提出基于距离、多普勒和二维角度等多域测量的网络化协同感知架构,设计多域解耦模型、保护带协议及相关估计算法,推导性能极限并验证算法接近该极限。

摘要:

作为6G的一项极具前景的技术,集成感知与通信(ISAC)正受到越来越多的关注。ISAC通过共享频谱、硬件和软件提供集成增益。然而,与专用雷达相比,其感知性能存在担忧。为解决这一问题,应利用广泛部署的网络的优势。本文提出基于多域测量(MM,包括距离、多普勒和二维角度)的网络化协同感知(NCS)。针对NCS-MM架构,本文提出一种新颖的多域解耦模型和一种新颖的基于保护带的协议。所提模型简化了多域推导和算法设计,所提协议节约资源并减轻NCS干扰。在性能极限方面,本文推导了NCS-MM中位置和速度估计的克拉美-罗下界(CRLB)。提出一种累积单维信道模型,证明其与多维模型等效。提出MM估计和融合的算法:提出任意维牛顿化正交匹配追踪(AD-NOMP)以准确估计无网格MM;分析MM的自由度(DoF),提出新颖的基于DoF的两阶段加权最小二乘(TSWLS)以在不损失DoF的情况下降低复杂度。数值结果表明,所提算法接近其性能极限。

英文摘要:

As a promising 6G technology, integrated sensing and communication (ISAC) gains growing interest. ISAC provides integration gain via sharing spectrum, hardware, and software. However, concerns exist regarding its sensing performance when compared to the dedicated radar. To address this issue, the advantages of widely deployed networks should be utilized. This paper proposes networked collaborative sensing (NCS) using multi-domain measurements (MM), including range, Doppler, and two-dimension angles. For the NCS-MM architecture, this paper proposes a novel multi-domain decoupling model and a novel guard band-based protocol. The proposed model simplifies multi-domain derivations and algorithm designs, and the proposed protocol conserves resources and mitigates NCS interference. In terms of performance limits, this paper derives the Cramér-Rao lower bound (CRLB) of position and velocity estimations in NCS-MM. An accumulated single-dimension channel model is proposed, which is proven to be equivalent to that of the multi-dimension model. The algorithms of both MM estimation and fusion are proposed. An arbitrary-dimension Newtonized orthogonal matched pursuit (AD-NOMP) is proposed to accurately estimate grid-less MM. The degree-of-freedom (DoF) of MM is analyzed, and a novel DoF-based two-stage weighted least squares (TSWLS) is proposed to reduce complexity without DoF loss. The numerical results show that the proposed algorithms approach their performance limits.

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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