Recent progress in Passive Coherent Location (PCL) concepts and technique in France using DAB or FM broadcasters

For some years, there has been an increasing interest in the use of civilian VHF-UHF opportunity transmitters for radar applications. Among the most different civilian broadcasters, analogue FM and Digital transmitters (like Digital Audio Broadcasters and Digital Video Broadcasters) seem to offer interesting capabilities for radar survey according to their availability and/or to their ldquowiderdquo bandwidth. This article will detail the main results obtained in France using DAB or FM. These results will be illustrated using experimental data.