Feature quantity measuring device, radio wave environment measuring device, feature quantity measuring method, radio wave environment measuring method, and program

A feature measuring method, comprising:

• acquiring time series data from a received signal;
• calculating a feature, based on data in a predetermined time span of the time series data;
• calculating a degree of similarity between the feature based on the data in the time span and supervised data representing a preset feature when there is a long-period variation;
• outputting a comparison result indicating a magnitude relationship between the degree of similarity and a predetermined threshold value;
• and
• determining, based on the comparison result, whether a characteristic of the long-period variation is contained within the time span and, when the characteristic is not contained, outputting the feature for the time span.

A storage medium of a program for causing a computer of a feature quantity measuring device to function as:

• an acquiring circuit configured to acquire time series data from a received signal;
• a feature quantity calculating circuit configured to calculate a feature, based on data in a predetermined time span of the time series data;
• a degree of similarity calculating circuit configured to calculate a degree of similarity between the feature based on the data in the time span and supervised data representing a preset feature when there is a long-period variation;
• a long-period variation detecting circuit configured to output a comparison result indicating a magnitude relationship between the degree of similarity and a predetermined threshold value;
• and
• a control circuit configured to determine, based on the comparison result, whether a characteristic of the long-period variation is contained within the time span and, when the characteristic is not contained, output the feature for the time span.