Two-dimensional shady radio image forming using short-range radiolocation intrusion alarm systems

Intruder’s shady radio image formation by means of transmission function reconstruction is discussed in this article. Diffraction pattern used for transmission function reconstruction could be recorded using fixed vertical receivers array while intruder moving on the ground surface. Innovation lies in transmission function reconstruction algorithm. It is similar to reversed Frenel transformation, but it has milder restrictions on distance between intruder and transmitter or receiver. The image formed could be used for measure intruder’s geometry and intruder’s classifying. This reduces disoperation rate. As a result there is a coast of guard actions reducing, which is an important line of intrusion alarm systems development.