6. Conclusion

The evolution of radiocommunications has led to a drastic increase in the performance of the interception, reception and detection functions that form the basic building blocks of any radiosurveillance system, whether for spectrum control in a civil regulatory context, or for battlefield control in a military context.

Signals that are increasingly varied, stealthy, frequency agile and broadband, occupying ever wider frequency planes and capable of adapting to increasingly complex radio environments, have been met by new digital interception and reception techniques that are widerband, faster and massively parallelized, and which have also benefited from advances in frequency synthesis components, filtering components, samplers and on-board computers.

The technical key to modern radiosurveillance systems today therefore lies in the capacity...