Development of Manual Radar Interference Prediction Model

摘要

This report describes the development and application of a theoretical model developed to manually predict the RF interference that a radar receiver may be subjected to and the effect this interference input might have on the Common Digitizer. The RF portion of the prediction is made in two steps. A rough cull is accomplished utilizing essentially power and distance to eliminate as many equipments as possible from consideration and then more detailed calculations are accomplished on only those emitters which are potential interference sources. The total amount of interference is examined to determine the effect on the probability of detection. Curves have been plotted showing that as the amount of interference increases the probability of detection decreases. The effect is much more pronounced for targets with small signal-to-noise ratios. The effects of interference whose PRF is nearly equal to or almost harmonically related to the operating rate of the Common Digitizer is examined. Inputs of this nature can cause the Common Digitizer to produce a false target due to the time relationship between the period of the interfering signal and the period of the Common Digitizer. (Author)