Semidefinite Relaxation for Source Localization by TOA in Unsynchronized Networks

Article Computer Science, Information Systems

Robust NLOS Bias Mitigation for Hybrid RSS-TOA Based Source Localization Under Unknown Transmission Parameters

Mayur Katwe et al.

Summary: This study proposes a robust method for source localization using RSS and TOA measurements in NLOS environments. By formulating a RWLS problem from the original non-convex ML estimation problem and tightening it with a convex-hull constraint, the NLOS bias is mitigated. Simulation results demonstrate the superior performance of the proposed method in various network scenarios and its excellence over existing methods.

IEEE WIRELESS COMMUNICATIONS LETTERS (2021)

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Article Engineering, Electrical & Electronic

Moving source localization using TOA and FOA measurements with imperfect synchronization

Jiong Shi et al.

Summary: This paper tackles the issue of clock bias and drift caused by imperfect time synchronization in localization problems. By transforming the measurement models and applying semidefinite relaxation (SDR), a convex semidefinite program is obtained to efficiently solve the nonlinear and non-convex weighted least squares (WLS) problem. Theoretical mean square error analysis and simulation results demonstrate that the proposed method can achieve CRLB accuracy under small Gaussian noise condition.

SIGNAL PROCESSING (2021)

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Article Engineering, Electrical & Electronic

Semidefinite Relaxation for Source Localization With Quantized ToA Measurements and Transmission Uncertainty in Sensor Networks

Yongsheng Yan et al.

Summary: This paper proposes a channel-aware source localization method based on quantized asynchronous ToA measurements, addressing the source localization problem in resource-limited wireless sensor networks. By introducing new techniques, the method provides efficient localization estimates in different scenarios, as validated through simulations and experiments.

IEEE TRANSACTIONS ON COMMUNICATIONS (2021)

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Article Engineering, Electrical & Electronic