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Soft Fault Estimation and Localisation in Y-Shaped Networks using OFDM-Based Signals

Ameer Ahmadie, Ndeye Gueye, Virginie Degardin, Vincent Cocquempot

TL;DR

The proposed method is based on analysing the transmission coefficients in the time domain under both fault-free and faulty situations, and an orthogonal frequency-division multiplexing (OFDM)-based scheme is used to estimate the TC.

Abstract

This paper introduces a method for detecting, estimating, and localising a soft fault in wired communication networks. The proposed method is based on analysing the transmission coefficients (TC) in the time domain under both fault-free and faulty situations. An orthogonal frequency-division multiplexing (OFDM)-based scheme is used to estimate the TC. A fault-severity ratio is derived to estimate the fault intensity, while a residual-based function is proposed to determine its location. Experimental validation is carried out on a Y-shaped test setup to demonstrate the efficiency of the proposed approach.

Soft Fault Estimation and Localisation in Y-Shaped Networks using OFDM-Based Signals

TL;DR

The proposed method is based on analysing the transmission coefficients in the time domain under both fault-free and faulty situations, and an orthogonal frequency-division multiplexing (OFDM)-based scheme is used to estimate the TC.

Abstract

This paper introduces a method for detecting, estimating, and localising a soft fault in wired communication networks. The proposed method is based on analysing the transmission coefficients (TC) in the time domain under both fault-free and faulty situations. An orthogonal frequency-division multiplexing (OFDM)-based scheme is used to estimate the TC. A fault-severity ratio is derived to estimate the fault intensity, while a residual-based function is proposed to determine its location. Experimental validation is carried out on a Y-shaped test setup to demonstrate the efficiency of the proposed approach.
Paper Structure (14 sections, 13 equations, 5 figures, 1 table)

This paper contains 14 sections, 13 equations, 5 figures, 1 table.

Table of Contents

  1. Introduction
  2. Estimation and localisation of soft faults
  3. Fault detection
  4. Fault estimation
  5. Fault localisation
  6. Test bench setup
  7. Estimation and localisation using the VNA-measured TC
  8. Fault estimation
  9. Fault localisation
  10. Sensitivity study of fault severity and position estimations
  11. OFDM Parameters
  12. TC estimation method
  13. Characterization of a fault
  14. Conclusion

Figures (5)

  • Figure 1: Y-shaped test bench scheme
  • Figure 2: Measured $|TC^{h}(f)|$ vs $|TC^{f}(f)|$
  • Figure 3: Measured $|TC^{h}(d)|$ vs $|TC^{f}(d)|$
  • Figure 4: Residual of the measured TC
  • Figure 5: Fault impedance $Z_{f}$ and position $\hat{x}$ based on the SNR

Theorems & Definitions (2)

  • definition 1
  • definition 2