A DPTF algorithm for the time-delay estimation in the reflected environment

Yao, SM; Meng, Qiao; Chen, Congyan; Tariq, Irfan

doi:10.1016/j.dsp.2022.103534

Cited by 2 publications

(1 citation statement)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An improved solution called the Dual-Path Transfer Function (DPTF) model was introduced to measure time delay in reflection environments, and a rapid DPTF algorithm that uses gradient-based techniques to obtain accurate values was developed. However, further improvements are still necessary to enhance the model’s robustness, especially when operating under the low-SNR conditions [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

Improving the Robustness of Time Difference of Arrival Estimation Based on the Energy Center of Gravity Rearrangement

Zhang,

Wen,

et al. 2023

Sensors

View full text Add to dashboard Cite

An accurate estimation of the time difference of arrival (TDOA) is crucial in localization, communication, and navigation. However, a low signal-to-noise ratio (SNR) can decrease the reliability of the TDOA estimation result. Therefore, this study aims to improve the performance of the TDOA estimation of dual-channel sensors for single-sound sources in low-SNR environments. This study introduces the theory of time rearrangement synchrosqueezing transform (TRST) into the time difference of arrival estimation. While the background noise TF points show random time delays, the signal time-frequency (TF) points originating from uniform directions that exhibit identical lags are considered in this study. In addition, the time difference rearrangement synchrosqueezing transform (TDST) algorithm is developed to separate the signal from the background noise by exploiting its distinct time delay characteristics. The implementation process of the proposed algorithm includes four main steps. First, a rough estimation of the time delay is performed by calculating the partial derivative of the short-time cross-power spectrum. Second, a rearrangement operation is conducted to separate the TF points of the signal and noise. Third, the TF points on both sides of the time-delay energy ridge are extracted. Finally, a refined TDOA estimation is realized by applying the inverse Fourier transformation on the extracted TF points. Furthermore, a second-order-based time difference reassigned synchrosqueezing transform algorithm is proposed to improve the robustness of the TDOA estimation by enhancing the TF energy aggregation. The proposed algorithms are verified by simulations and experiments. The results show that the proposed algorithms are more robust and accurate than the existing algorithms.

show abstract

Section: Introductionmentioning

confidence: 99%