Cycle estimation device for pulse train signal, cycle estimation method for pulse train signal, and cycle estimation program for pulse train signal

A pulse train signal cycle estimation method, comprising:

• extracting a candidate cycle that is a cycle determination target from an input time-series pulse train;
• converting an arrangement of the time-series pulse train into numerical values on the basis of the extracted candidate cycle and outputting a constant that adjusts a random noise threshold value of pulse repetition interval (PRI) conversion in response to an index indicating a degree of concentration of calculated numerical values;
• and
• executing PRI conversion using a value of the candidate cycle and the constant and performing cycle determination and cycle value detection.

A non-transitory computer readable medium including a pulse train signal cycle estimation program for causing a computer to execute:

• extracting a candidate cycle that is a cycle determination target from an input time-series pulse train;
• converting an arrangement of the time-series pulse train into numerical values on the basis of the extracted candidate cycle and outputting a constant that adjusts a random noise threshold value of pulse repetition interval (PRI) conversion in response to an index indicating a degree of concentration of calculated numerical values;
• and
• executing PRI conversion using a value of the candidate cycle and the constant and performing cycle determination and cycle value detection.