Blip-to-scan ratio

With radar sensors, the detection probability indicates with which percentage frequency is a useful signal for display. It is directly on the signal / noise ratio and the adjusted threshold dependent and should usefully be as large as possible. Normally, the radar range is specified for a detection probability of 80%. For analog radars following calculation algorithm is used:

If the received echo signal is demodulated and present as a video signal ( or data word), it is passed over the threshold circuits that are to be set so that they can pass information signals from a certain amplitude and make the noise largely ineffective. Since noise spikes are included in the noise, which are in the order of magnitude smaller payloads, a compromise must be received in the threshold. On one hand, useful signals arrive from a specified minimum amplitude for display, on the other hand, the false alarm rate can not exceed a certain percentage.

In earlier publications, the detection probability is still referred to by the English term "blip scan ratio".

• Radar