Estimation device, estimation method and estimation program

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.

A non-transitory computer readable medium storing estimation program for causing a computer to execute:

• aggregating an input pulse train signal including a time-series pulse corresponding to a predetermined observation time into pulses for a 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.