Efficient solutions for target localization in asynchronous MIMO networks

Wu, Xiaoping; Li, Yunlong; Shen, Yana; Zhu, Xiao‐Wei

doi:10.1016/j.jnca.2022.103441

Cited by 5 publications

(2 citation statements)

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“…By making use of VLC, the LED transmitter index can be identified. In addition to this, range-based information is required to determine the user position [28,29]. Typical range techniques include the time of arrival (TOA) [30,31], angle of arrival (AOA) [32], and received signal strength (RSS) [33].…”

Section: Related Workmentioning

confidence: 99%

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Efficient Closed-Form Solutions for Visible Light Positioning in Low-Cost IoT Devices

Zhu,

Mo,

2024

Electronics

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Visible light positioning (VLP) has drawn great attention in the field of indoor positioning as light communication has been popularized in low-cost Internet-of-Things (IOT) devices. In this paper, we investigate the VLP problem using the received signal strength (RSS) and by only considering the line-of-slight (LOS) propagation. The RSS-based VLP problem is highly nonlinear, and its solutions may be trapped in local optima without a good initial guess. To circumvent this difficulty, we propose closed-form solutions of the VLP problem considering a known or unknown user orientation. By applying the weighted least squares (WLS) method, the closed-form solutions are divided into two stages. In the stage-one WLS solution, the nonlinear VLP problem is transformed into a pseudo-linear form by introducing some auxiliary variables, which are considered to be independent of each other. The estimates of the stage-one WLS solution are further refined in the stage-two WLS solution by exploiting the constrained relationships among these defined variables. The simulation results show that the stage-two WLS solution provides good estimates for the user position and orientation. The proposed stage-two WLS solution outperforms the existing methods especially at a high signal-to-noise ratio (SNR).

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