Fast target deception jamming method against spaceborne synthetic aperture radar based on equivalent bistatic scattered fields

A Moving Target Deception Jamming Method Based on Fast Azimuth-Domain Block EM Calculation Against SAR-GMTI

“…Because the range from the SAR to the deceptive target is usually much larger than the size of the target, R t (t a ) can be approximately equal to the summation of the range from the origin to the radar, denoted by R o (t a ), and the projection of the vector from the origin to the point on the vector of directed from the radar to the origin [11]. It can be denoted by [19] R t (η) ≈ R(η)…”

“…Generally, if you consider a detailed object model, the former part not only consumes most of the computing resources, but also needs to be performed for each observation angle when calculating the monostatic scattered fields. By constrast, it is more efficient to obtain the bistatic scattered field data because ray tracing is performed only once for the incident direction and only the EM calculation are required for each viewing angle [11].…”

“…However, the jamming requires a very high jamming power and has the low concealment purpose. In the deception jamming way [6]- [11], it can simulate the characteristics of moving target echoes so that false moving targets can be generated in SAR image. In contrast, the deception jamming technique needs less jamming power, and produces false signals similar to real echoes while haves the same processing gains as real echoes.…”