A Fuzzy Interpolation Cross-Correlation Method for Time-Delay Estimation of Partial Discharge UHF Pulse Signals

Table 3

The calculated time delay and errors.

Interpolating point	Sampling rate (GHz)	Time delay (ns)			Error rate (%)
		Expected value	Method 1	Method 2	Method 1	Method 2
0	1	2.67	5	5	87.3	87.3
1	2	2.67	3.5	4	31.1	49.8
3	4	2.67	3.25	3.75	21.7	40.4
7	8	2.67	2.75	3.0	3.0	12.4
15	16	2.67	2.75	2.88	3.0	7.87

“Method 1” represents the proposed fuzzy interpolation cross-correlation method and “Method 2” represents denotes the cubic spline interpolation cross-correlation method.