A novel method is presented that permits one to locate a moving object
. According to this method, the change in location of a moving object
can be detected from its Fourier spectrum. This method has the advanta
ges of a high-precision locating mechanism and the capacity to permit
one to ignore the change in the orientation and the size of the moving
object. The principles are introduced, a computer simulation and expe
rimental demonstration are given, and the practicality of this method
is discussed.