Abstract:

Jamming is protecting the original target from being detected by the enemy radar. There are different types of jamming methods that can mislead the enemy radar, but they are not as effective and still have a chance to retrieve the original signal from the enemy radar. Thus, a deception jamming is proposed using interrupted sampling repeater jamming called ISRJ. ISRJ generates a train of false targets and also uses an active echo cancellation technique which totally cancels the original target echo signal and generates only a train of false targets. The techniques used before to cancel the targets are based on Linear Frequency Modulation (LFM) radar waveform. A Non-Linear Frequency Modulation (NLFM) waveform is used because it has an advantage of very low peak side lobe level. In this paper, we generated a train of false targets along with real radar target echos to deceive the enemy radar and to protect the target from being detected. In addition, the amplitude of the real target is made very small to confuse enemy radars. However, the fact cannot be ignored that the original target echo is present in the false targets, so there is a chance that the enemy radar can detect the original target. Therefore, using the active cancellation technique cancelled the target echo signal. The results are compared with both LFM and NLFM pulse compression techniques. The simulation results show how the target echo is cancelled and protected by the false targets.

Key words: deception jamming, false targets, ISRJ, interrupted sampling, linear frequency modulated, NLFM