Digital Processing of Radar Signals in the Automatic Helicopter Landing System on a Moving Platform

The paper deals with the problem of landing a helicopter on a moving platform in difficult weather conditions. The article presents a study of the possibility of automatic determination of coordinates, using antennas located on the blades of a helicopter propeller, relative to the landing site where the radio signal sources are located. This arrangement of the antennas when moving in space allows you to measure the distance to the source of the radio signal due to the Doppler shift of the signal frequency. The implementation of such a system can make it possible to solve the most complex aviation tasks to ensure navigation during takeoff/landing in difficult weather conditions, as well as during search and rescue operations. Such a technical solution allows you to get the direction of the radiation source of the radio signal, as well as the range to it with high accuracy.