Research on Time Delay Estimation Method of Partial Discharges Signal with Improved Weighted Function
Open accessAbstract
Positioning systems based on the Time Difference of Arrival (TDOA) often struggle to accurately estimate time delays for partial discharge signals in complex electromagnetic environments. To address this, we introduce an improved joint-weighted generalized cross-correlation (GCC) time delay estimation algorithm. Traditional GCC time delay estimations, when reliant on conventional weighted functions, significantly underperform in situations characterized by low signal–noise ratios (SNRs). Our proposed improved joint weighted function combines the advantages of both phase transform (PHAT) and correlation transform (SCOT) weightings, resulting in a composite function. Compared to the conventional weighted GCC, the improved joint weighted GCC displays a more distinct peak in cross-correlation functions and ensures more robust delay estimations, especially under low SNR conditions. Experimental results indicate that the improved joint-weighted GCC algorithm achieves an error margin below 1 ns in challenging outdoor electromagnetic scenarios, demonstrating its aptitude for detecting and localizing partial discharge signals in practical engineering applications.
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Traditional weighting functions and the generalized cross-correlation algorithm have limited time delay estimation effect at a low SNR.
“Due to the limited time delay estimation effect of the traditional weighting function and generalized cross-correlation algorithm at a low SNR, many scholars have studied various improved weighting functions [7,8,9,10].”
From Research on the Improvement of the Signal Time Delay Estimation Method of Acoustic Positioning for Anti-Low Altitude UAVs (2025) · cites this paper as [8]
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References 4 · Cited by 10
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- Authors
- Liu, W., Li, M., Wang, T., Jin, M., & Fang, Q.
- Affiliations
- Shijiazhuang Tiedao University (CN)
- Corresponding author
- Liu, Weidong
- Venue
- Electronics
- Publisher
- MDPI AG
- Published
- 2023-10-10
- Volume
- 12
- Issue
- 20
- Pages
- 4196
- ISSN
- 2079-9292 (ISSN-L)
- OpenAlex
- W4387496039
- Cited by
- 10
- References
- 4
- Citations by year
- 2026: 3 · 2025: 6 · 2024: 1
- FWCI
- 0.74
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Electronics (publishedVersion, cc-by)
- Funders
- National Natural Science Foundation of China (61801309, 51807123)
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Indoor and Outdoor Localization Technologies
- Physical Sciences › Computer Science › Signal Processing › Speech and Audio Processing
- Physical Sciences › Computer Science › Signal Processing › Direction-of-Arrival Estimation Techniques
- Keywords
- time delay estimation, time difference of arrival, generalized cross-correlation, low signal-to-noise ratio, partial discharge localization, electromagnetic interference
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