Method and device for processing signal, radar apparatus, and program for processing signal

A radar apparatus, comprising:

• an echo signal input module for being inputted with echo signals caused by electromagnetic waves emitted from an antenna being reflected on one or more target objects;
• an echo signal level detecting module for detecting a level of each of the echo signals in association with a distance and an azimuth direction from the antenna;
• a level change detecting module for detecting a level change between the echo signals from locations which are close to each other where the distances from the antenna are substantially the same but the azimuth directions from the antenna are different;
• a pattern output module for comparing the level change with a reference pattern determined in advance to output a level change pattern;
• an interference determining module for determining interference based on at least two of the level change patterns;
• and
• an antenna for revolving while emitting electromagnetic waves for every azimuth direction and receiving echo signals.

A method of processing a signal, comprising:

• inputting echo signals caused by electromagnetic waves emitted from an antenna being reflected on one or more target objects;
• detecting a level of each of the echo signals in association with a distance and an azimuth direction from the antenna;
• detecting a level change between the echo signals from locations which are close to each other where the distances from the antenna are substantially the same but the azimuth directions from the antenna are different;
• comparing the level change with a reference pattern determined in advance to output a level change pattern;
• and
• determining interference based on at least two of the level change patterns.

A computer readable program for causing a computer to process a signal, comprising:

• causing a computer to be inputted with echo signals caused by electromagnetic waves emitted from an antenna being reflected on one or more target objects;
• causing a computer to detect a level of each of the echo signals in association with a distance and an azimuth direction from the antenna;
• causing a computer to detect a level change between the echo signals from locations which are close to each other where the distances from the antenna are substantially the same but the azimuth directions from the antenna are different;
• causing a computer to compare the level change with a reference pattern determined in advance to output a level change pattern;
• and
• causing a computer to determine interference based on at least two of the level change patterns.