Abstract
Dual-source jamming is an effective way to prevent monopulse radar systems from performing accurate angle measurements. In this investigation, based on noncoherent dual-source jamming, we propose a cooperative deception approach, which has the benefit of causing persistent and large angular measurement errors to protect a true target and therefore can greatly reduce the discrimination capability of a distributed track-to-track radar fusion system. A scenario involving a single target accompanied by a digital radio frequency memory (DRFM)-based repeater jammer countering two radar systems is illustrated. By controlling the amplitude ratio and time delay in a statistical manner, the active decoy signal and target echo signal can form a noncoherent angular glint effect and result in the deviation of the angle tracking loop of the two radar systems from the true target in opposite directions. The track-to-track association distance related to the retransmission parameters is explicitly derived, and its statistical characteristics are analyzed in detail. Simulations verify the feasibility of the approach. The advantage of the approach lies in its ability to destroy the so-called “common origin” signature of the physical target by injecting false angular information. The direct result is that the true target might not successfully complete the process of track-to-track association, thereby enabling us to realize the desirable effect of “disguise the true target and instead show false decoys”.
Highlights
In recent years, the technology of networked radar systems has received much attention and found wide use in many military and civilian applications [1]–[5]
As far as the whole jamming effect is concerned, keeping the true target of interest from not being detected by each tracking radar system, and subsequently preventing it from being affirmed by the fusion center, is much more important than showing false target tracks in each radar scan without some cooperation. For this reason (i.e., ‘‘disguise true target’’), this paper proposes a cooperative deception jamming approach to reduce the capability of distributive radar fusion and discrimination
To defeat distributed radar fusion, this paper proposes a cooperative method where jamming signals and the true target signal can form the noncoherent dual-source angle deception effect by controlling the delay and amplitude
Summary
The technology of networked radar systems ( called multi-site radar systems, multiradar systems, multistatic radar systems, etc.) has received much attention and found wide use in many military and civilian applications [1]–[5]. COOPERATIVE DUAL-SOURCE ANGLE JAMMING METHOD to reduce the fusion performance of the networked radar system, we analyze the track-to-track association distance of the true target between two radar systems. It indicates an interesting fact: to disguise the true target such that it is not affirmed by a fusion center, we need to control only the two amplitude ratios such that one ratio is larger than one and the other is smaller than one, i.e., ρ1 > 1, ρ2 < 1 or ρ1 < 1, ρ2 > 1 This means that in a general noncoherent situation, the measured angle of one radar system should be FIGURE 8.
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