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arXiv 2610.19987eess.SP
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存在相位噪声的OFDM系统中用于目标定位的混合单基地与双基地感知

Hybrid Monostatic and Bistatic Sensing for Target Localization in OFDM Systems under Phase Noise

Universitat Autònoma de Barcelona(巴塞罗那自治大学);Chalmers University of Technology(查尔姆斯理工大学)

Lucía Pallarés Rodríguez, Musa Furkan Keskin, Alireza Pourafzal, José A. López-Salcedo, Gonzalo Seco-Granados, Henk Wymeersch

AI总结:

本文针对OFDM系统中混合单双基地感知的相位噪声问题,表征联合残余差分PN统计特性,通过理论下界量化三类接收机下PN对目标定位的影响,为相关感知系统设计提供理论依据。

摘要:

在混合单基地-双基地正交频分复用(OFDM)感知中,每个感知节点会接收单基地与双基地目标回波的叠加信号,由于振荡器共享机制,两类回波的相位噪声(PN)特性存在根本差异:单基地感知可通过共用收发振荡器实现部分PN抵消,而双基地感知涉及独立振荡器,受PN影响更显著。本文在集中式双节点感知系统中,对这些叠加分量的联合残余差分PN统计特性进行了表征,并通过理论下界量化其对目标定位的影响,该下界考虑了三类不同接收机:(i)无PN的理想接收机;(ii)利用联合PN统计特性的PN感知接收机;(iii)忽略PN的PN无知接收机。

英文摘要:

In hybrid monostatic-bistatic orthogonal frequency-division multiplexing (OFDM) sensing, each sensing node receives a superposition of monostatic and bistatic target returns, whose phase-noise (PN) characteristics differ fundamentally due to oscillator sharing. While monostatic sensing benefits from partial PN cancellation through the common transmit-receive oscillator, bistatic sensing involves independent oscillators and is therefore more strongly affected by PN. In this paper, we characterize the joint residual differential PN statistics of these superimposed components in a centralized two-node sensing system and quantify their impact on target localization via theoretical lower bounds considering three different receivers: (i) PN-free ideal receiver, (ii) PN-aware receiver that exploits the joint PN statistics, and (iii) PN-ignorant receiver that neglects PN.

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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