Deceptive jamming suppression for SAR based on time-varying initial phase

Feng, Qingqing; Xu, Huaping; Wu, Zhefeng; Sun, Bing

doi:10.1109/igarss.2016.7730303

Cited by 19 publications

(6 citation statements)

References 8 publications

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“…In this subsection, we will discuss the DJ suppression performance of the proposed method. Here, we choose the RPC [28] and the AQPC [29] methods as comparisons. To stay the integrality of the whole procedure of the proposed method, still we choose the parameters in Table I and the same detection scene in Fig.…”

Section: B Dj Suppression Performance Analysesmentioning

confidence: 99%

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Joint Radio Frequency Interference and Deceptive Jamming Suppression Method for Single-Channel SAR via Subpulse Coding

Nie

Liao

Zeng

et al. 2023

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

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The radio frequency interference (RFI) and deceptive jamming (DJ), as two major external threats to synthetic aperture radar (SAR) systems, can greatly reduce the readability and veracity of the obtained SAR images. Current interference suppression methods have no capability to suppress both of them. In this article, a subpulse coding (SPC)-based joint RFI and DJ suppression method for single-channel SAR systems is proposed. By making full use of the elaborate coding scheme and subpulse transmitting mode, SPC can effectively suppress RFIs in the Doppler domain. On the other hand, after the decoding process, by utilizing the subpulse digital beamforming (DBF) technology with the well-designed DBF weight vectors, DJs can also be suppressed greatly. Numerical experiments verify the effectiveness of the proposed method.

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Section: B Dj Suppression Performance Analysesmentioning

confidence: 99%

“…In terms of DJ suppression, methods can be roughly divided into two categories: fixed waveform methods [24], [25], [26], [27] and agile waveform methods [28], [29]. For the fixed waveform methods, they can suppress intrapulse DJs, and the system complexities of them are always very low.…”

Section: Introductionmentioning

confidence: 99%

Joint Radio Frequency Interference and Deceptive Jamming Suppression Method for Single-Channel SAR via Subpulse Coding

Nie

Liao

Zeng

et al. 2023

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

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show abstract

“…The subsequent azimuth processing is the same as that of conventional SAR. This random initial phase will cause the azimuth phase of the jamming signal to be not perfectly coherent, and the azimuth processing gain cannot be obtained sufficiently, so that the jamming signal can be suppressed to a certain extent [11].…”

Section: Agility Of Initial Phasementioning

confidence: 99%

“…Generally, SAR transmits wideband LFM signals, and its waveform parameters include carrier frequency, bandwidth, pulse width, chirp rate, chirp rate polarity, initial phase and pulse repetition interval (PRI). While the bandwidth should be kept constant to ensure the equal range resolution of each pulse during the synthetic aperture data collection period, other parameters, such as pulse width or chirp rate [6], chirp rate polarity [10], initial phase [11] and PRI [12], can be set to random agility in principle. The random agility increases the complexity and uncertainty of the transmitted signal, confuses the jamming interception, disturbs the timing of coherent jamming repeater and destroys the coherence of the jamming signal in range and azimuth dimensions; finally, the purpose of suppressing coherent interference is achieved.…”

Section: Introductionmentioning

confidence: 99%

“…The literature [13] points out that the pseudo-random agility technology for interpulse waveform parameters is faced with certain challenges of large computation and complex system design, which needs to be further studied and solved. Most of the existing works I the literature only study SAR anti-coherent interference technology [6,[9][10][11][12] itself with random agility of interpulse waveform parameters. However, the influence of random agility of interpulse waveform parameters on airborne SAR image formation is ignored, and no definite conclusion, i.e., whether airborne SAR with random agility of interpulse waveform parameters can acquire high-quality high-resolution SAR images just like conventional airborne SAR with constant waveform parameters, was given.…”

Section: Introductionmentioning

confidence: 99%

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Studies on High-Resolution Airborne Synthetic Aperture Radar Image Formation with Pseudo-Random Agility of Interpulse Waveform Parameters

Ye,

Zhu,

Niu

et al. 2023

Remote Sensing

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By means of alteration of the transmitted linear frequency modulation (LFM) signal waveform parameters, such as pulse width or chirp rate, initial phase, pulse repetition interval (PRI), and chirp rate polarity at every position of synthetic apertures, the pseudo-random agility technology of interpulse waveform parameters in airborne Synthetic Aperture Radar (SAR) actively increases the complexity and uncertainty of radar waveforms. This technology confuses jamming interception receivers, thus improving its anti-interference ability for active coherent jamming, which is one of the main research interests of airborne SAR technology. But the pseudo-random agility technology for interpulse waveform parameters faces certain challenges of large computation and complex system design, which need to be further studied and solved. To address these issues, a processing scheme of high-resolution SAR image formation which is appropriate for agile interpulse waveform parameters is proposed in this paper. This method can deal with multiple agile parameters, not only single ones as in most existing literature. Its computation load is nearly comparable to that of traditional SAR image formation with constant waveform parameters. The high-resolution SAR imaging results obtained by processing SAR raw data with agile interpulse waveform parameters demonstrate the effectiveness of the proposed method. In addition, real SAR images with resolutions of 0.5 m and 0.15 m, which are rarely found in the public literature, are shown under the circumstance of randomly changing the transmitted wideband LFM signal pulse parameters one by one.

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Suppression Approach to Main-Beam Deceptive Jamming in FDA-MIMO Radar Using Nonhomogeneous Sample Detection

Lan

Liao

et al. 2018

IEEE Access

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Deceptive jamming suppression for SAR based on time-varying initial phase

Cited by 19 publications

References 8 publications

Joint Radio Frequency Interference and Deceptive Jamming Suppression Method for Single-Channel SAR via Subpulse Coding

Joint Radio Frequency Interference and Deceptive Jamming Suppression Method for Single-Channel SAR via Subpulse Coding

Studies on High-Resolution Airborne Synthetic Aperture Radar Image Formation with Pseudo-Random Agility of Interpulse Waveform Parameters

Suppression Approach to Main-Beam Deceptive Jamming in FDA-MIMO Radar Using Nonhomogeneous Sample Detection

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