Patent ID: 7398086

Claim:
A method for detecting at least one mobile in a standby mode, comprising: searching with a moving search device located at a varying altitude above said at least one mobile; simulating, at said moving search device, a cellular network to activate said at least one mobile, wherein said simulating comprises repeatedly changing the Location Area Identification of a broadcast channel of the simulated network to force said at least one mobile to repeat location updating procedures by simulating a change of cell; using a flat plate or trihedral antenna equipped with N radioelectric sensors to detect at least one signal transmitted by said at least one mobile; taring a plurality of reception channels of said antenna with a frequency generator, wherein said antenna and said frequency generator are positioned as close as possible to one another, and said frequency generator is used for self-calibration of reception systems up to signal digitization; and determining at least one parameter representative of said at least one signal transmitted by said activated at least one mobile.