SAR Seeker Deception Jamming and Anti-jamming Measures

Liu, Yunfo; Bu, Yuanyuan; Liu, Hongjun; Wang, Ren

doi:10.1109/apsar46974.2019.9048540

Cited by 1 publication

(1 citation statement)

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“…In most instances, the jamming signal is similar and may even be identical to the radar signal. It is difficult to distinguish the interfering signal from the radar echo because they overlap in both the time and frequency domains [ 1 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

A Novel Method for Interferometric Phase Estimation in Dual-Channel Cancellation

Huang

Liu

Huang

et al. 2022

Sensors

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Multichannel SAR systems have grown rapidly over the past decade due to their powerful high-resolution and wide-swath (HRWS) capabilities. Because spatially separated channels also have the potential to suppress jamming, dual-channel cancellation is a general method that is effective regardless of the type of jamming signal. In this paper, the principle of dual-channel cancellation (DCC) is introduced, and several practical problems using DCC are also discussed. Moreover, this paper emphasizes interferometric phase estimation, which is the key to DCC. If the jamming-to-signal ratio (JSR) is high, the interferometric phase can be estimated accurately from the interferometry of two channel signals, but estimation becomes rather difficult when the JSR decreases. To solve the problem of interferometric phase estimation under a low JSR, a novel interferometric phase estimation method using cosine similarity is proposed in this paper. L-band airborne dual-channel SAR is performed to investigate the applicability of the method. The results not only prove that cosine similarity is an effective method for interferometric phase estimation, but also demonstrate the potential of DCC in the SAR anti-jamming processing.

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Section: Introductionmentioning

confidence: 99%