Threshold setting method, the target object detection method, the threshold setting program, the target object detection program, and the target object detection device

摘要

This disclosure provides a method of setting a threshold according to a level of an unwanted component of an echo signal, such as a radar echo signal. The echo signals are generated by transmitting and receiving a radio wave with an antenna while the antenna revolves. The method of setting the threshold includes calculating a difference value between a level of the echo signal at an observing position and a level of the echo signal at a position adjacent to the observing position, selecting a process for setting a threshold from either one of a first threshold setting process and a second threshold setting process according to the difference value, and updating the threshold for the observing position by using the selected threshold setting processing.