Jammer signal effectiveness against a conical-scan missile seeker

Analysis of the jam signal effect against the conical-scan seeker

“…The carrier filter is centered at 1.6 kHz in the simulation, and not at the carrier frequency in order to extend the linear region of the static gain curve of the seeker, allowing a wider range of radial positions to be demodulated accurately. 22,23 The signal is then passed through a frequency discriminator, which converts the FM signal to an amplitude modulation (AM) signal. The frequency discriminator is implemented using a high-pass filter (HPF) with a cut-off frequency of 1.8 kHz.…”

“…The simulation model output was compared to results from other simulation systems. 8,11,23 The time taken for the model to reduce specified errors to zero was considered. The fixed carrier jam signal is generally used in the literature for jam signal analysis and this jam signal was used in this study for validation.…”

“…8,11 The effect of varying the J/S ratio and the carrier frequency of a jam signal was compared with the literature with satisfactory results. 23 The seeker was set up to track target movement with an angular position loop; for a stationary target, there should be no change in seeker angular position. The simulation attempts to measure the countermeasure effectiveness by testing for an erroneous apparent seeker position, attributable only to the countermeasure presence, when viewing a stationary target.…”