Patent ID: 11909619
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 5:
6. An estimation method, comprising:
aggregating an input pulse train signal including a time-series pulse corresponding to a predetermined observation time into pulses fora unit time;
calculating a time shift amount of an autocorrelation function using the aggregated pulse train signal;
calculating an autocorrelation value and a threshold with respect to each of time shift amounts selected in ascending order from the calculated time shift amount and detecting the time shift amount as a period of the aggregated pulse train signal when the autocorrelation value exceeds the threshold;
converting the detected period to a period of the input pulse train signal using the unit time; and
excluding the pulse train signal having the converted period from the input pulse train signal.