Deletion of the signal in direct way by clean analysis in a system of coherent passive detection

The purpose of a system of coherent passive detection is to get back the echo resulting from the reflection on the target to detect. The method by clean analysis based on the projection of signals in an orthogonal sub-space in the direct signal allows preventing the problem of interference which engenders the presence of the signal in direct way in this type of system of detection. In the case of the presence of an echo and a direct signal, the study of the distribution of the powers of every signal by the analysis of the variation of the clean values according to the mnuber of elements of the network of antennas or the number of sub-networks demonstrates that these signals remain quartered in their respective orthogonal sub-space without influencing in a important way the other sub-space.