Fast Generation of Deceptive Jamming Signal Against Space-Borne SAR

Abstract

Due to advantages such as its low power consumption and higher concealment, deceptive jamming against space-borne synthetic aperture radar (SAR) has received extensive attention during the past decades. To reduce the computational complexity in the deceptive jamming operation, this paper proposes a new approach to generate the jamming signal efficiently. Based on the Taylor series expansion and approximation, we derive the recursive formula, which can be used to calculate the current system function of jammer (JSF) from that in the previous pulse repetition interval (PRI). After the calculation of the initial JSF, the deceptive jamming signal can be quickly generated through the recursive algorithm. Then the validity and effective region of the algorithm is estimated through theoretical analysis of the slant distance error. Finally, the simulation results confirm the superior effect of the proposed algorithm. Compared with the segmented modulation algorithm, the most commonly used fast algorithm for deceptive jamming, this algorithm improves the focusing performance slightly while reducing the computational complexity by at least 6.25%.

Generation of a synthetic aperture radar deception jamming signal based on a deep echo inversion network

“…On the one hand, the inverse range Doppler algorithm (IRDA) [10], two‐step method [11], frequency‐domain three‐level method [12], and mosaic scene deception jamming method based on two‐dimensional separation [13] improve the generation speed of the SAR deception jamming signal by sacrificing the imaging quality of the jamming signal. On the other hand, the inverse Omega‐K algorithm (IωKA) [14], time‐delay and frequency‐shift with template segmentation (TDFS‐TS) algorithm [15], recursive algorithm (RA) [9], spatial frequency‐domain interpolation (SFI) algorithm [16] achieve better imaging quality of the SAR deception jamming signal but at the expense of the SAR deception jamming signal generation speed.…”

“…Various radar electronic countermeasures (ECM) have been developed in recent decades to prevent the detection of sensitive targets and protected areas by enemy SAR [1,3,4]. SAR deception jamming has become popular in recent years because of its low power requirements, flexible operability, and significant damage to SAR [4][5][6][7][8][9].…”