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arXiv 2301.01042eess.SP
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硬件损伤下基于OFDM的5G/6G定位建模与分析

Modeling and Analysis of OFDM-based 5G/6G Localization under Hardware Impairments

Hui Chen, Musa Furkan Keskin, Sina Rezaei Aghdam, Hyowon Kim, Simon Lindberg, Andreas Wolfgang, Traian E. Abrudan, Thomas Eriksson, Henk Wymeersch

AI总结:

该研究针对高频段5G/6G毫米波MIMO系统,建模各类硬件损伤,通过误设克拉美罗界分析其对定位及通信性能的影响,为相关系统的损伤评估提供支撑。

摘要:

定位被视为满足第五/第六代(5G/6G)通信系统中通信与情境感知服务需求的关键支撑技术。用户定位可通过上行/下行导频信号,基于时延与角度估计实现。然而,硬件损伤(HWIs)(如相位噪声和互耦效应)会在发射端和接收端使信号发生失真,进而影响定位性能。尽管在硬件损伤程度较轻、定位要求不那么严格的低频段,这种影响可以忽略,但在高频频段,仍需开展建模与分析工作,以评估硬件损伤导致的定位精度下降情况。在本研究中,我们针对毫米波多输入多输出通信系统的各类损伤进行建模,并开展误设克拉美罗界分析,从角度/时延估计以及由此产生的三维位置/姿态估计误差两个维度,评估硬件损伤引发的性能损失。我们还从符号错误率(SER)角度,探究了单项及整体硬件损伤对通信的影响。我们的大量仿真结果表明,各类硬件损伤都会导致角度与时延估计性能出现不同程度的下降,且对时延估计影响显著的损伤因子会对符号错误率产生主导性的负面影响。

英文摘要:

Localization is envisioned as a key enabler to satisfy the requirements of communication and context-aware services in the fifth/sixth generation (5G/6G) communication systems. User localization can be achieved based on delay and angle estimation using uplink/downlink pilot signals. However, hardware impairments (HWIs) (such as phase noise and mutual coupling) distort the signals at both the transmitter and receiver sides and thus affect the localization performance. While this impact can be ignored at lower frequencies with less severe HWIs, and less stringent localization requirements, modeling and analysis efforts are needed for high-frequency bands to assess degradation in localization accuracy due to HWIs. In this work, we model various types of impairments for a mmWave multiple-input-multiple-output communication system and conduct a misspecified Cramér-Rao bound analysis to evaluate HWI-induced performance losses in terms of angle/delay estimation and the resulting 3D position/orientation estimation error. We also investigate the effect of individual and overall HWIs on communication in terms of symbol error rate (SER). Our extensive simulation results demonstrate that each type of HWI leads to a different level of degradation in angle and delay estimation performance, and the prominent impairment factors on delay estimation will have a dominant negative effect on SER.

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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