Patent ID: 7859463

Claim:
A method of detecting a target by bistatic radar detection using non-cooperative radio signals transmitted by a transmitter, the radio signals corresponding to a plurality of frequency channels, the method comprising: receiving, by a receiver positioned away from the transmitter, a received signal including reference signals derived from a portion of the radio signals originating from the transmitter along a direct route and reflected signals derived from another portion of the radio signals reflected by the target; filtering the received signal to obtain a corresponding reference signal and a corresponding reflected signal for each one of the frequency channels; analysing, for each one of the frequency channels, the corresponding reflected signal and the corresponding reference signal to identify a cell in a bistatic distance —Doppler velocity domain and to assign a signal value to the cell, the bistatic distance —Doppler velocity domain being divided into a plurality of cells, and each one of the plurality of cells corresponding to a region having a predetermined distance interval Δd and a predetermined velocity interval Δv d around a point defined by a bistatic distance and a Doppler velocity; for at least one cell of the plurality of cells, performing coherent integration of signal values for the frequency channels assigned to the at least one cells and assigning an integration result to the at least one cell; identifying a bistatic distance defined within the at least one cell for the target when the integration result assigned to the at least one cell exceeding a threshold level.