Experimental Analysis of the Environmental Noise in Passive Radar Based on FM Radio

Passive radar does not have its own signal source. Consequently, it is fully dependent on the presence of other signals that it can use for its operation. These signals are not optimal from the radar point of view. Therefore advanced signal processing algorithms are required to detect and track targets correctly. Detection of targets by radar is possible with the appropriate signal-to-noise level. In the case of passive radar, which usually operates in the VHF or UHF band, the noise level is often determined by environmental noise rather than the receiver’s noise figure. In this paper, the level of environmental noise is investigated in FM-based passive radar.