Spaceborne synthetic aperture radar and noise jamming

Dumper, K.; Cooper, P. S.; Wons, A.F.; Condley, C.J.; Tully, P.

doi:10.1049/cp:19971707

Cited by 48 publications

(27 citation statements)

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“…c fcR jm (6) By performing FFT of J 1D (f, t m ) along slow time, the 2D imaging result of jamming signal can be obtained as…”

Section: Signal Processing For the 2d-cnj Methodsmentioning

confidence: 99%

“…Because these techniques are always military secrets, there are actually few published materials. As an active suppression jamming method, traditional non-coherent noise jamming (non-CNJ) [6] cannot well counter to the wideband LFM radar for its poor relativity with the radar signal. By transmitting the product [7][8][9] or the convolution results [10,11] of noise and radar signal, the coherence is improved, which can greatly enhance the output jamming to signal ratio (JSR).…”

Section: Introductionmentioning

confidence: 99%

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Two-Dimensional Discretized Coherent Noise Jamming Method to Wideband LFM Radar

Gong¹,

Wei²,

Li³

et al. 2014

PIER Letters

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Abstract-For coherent jammers to wideband linear frequency modulation (LFM) radar, the ratio between jamming energy and signal energy is always constant. To enhance the jamming to signal ratio (JSR), a two-dimensional (2D) discretized coherent noise jamming (2D-DCNJ) method is first proposed in this paper, where the covering area of the noise jamming results in 2D imaging is limited to a certain shape and further discretized to centralize the jamming energy. Moreover, the idea of weighting is applied to 2D-DCNJ to control the distribution of jamming energy, which can present some particular deceptive characteristics. The relationship between jamming results and modulated noise is analyzed, based on which the procedure of generating the jamming signal is detailed, and the JSR performance is compared with the previous ones. Finally, the validity of the proposed method is demonstrated via numerical simulation.

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“…c fcR jm (6) By performing FFT of J 1D (f, t m ) along slow time, the 2D imaging result of jamming signal can be obtained as…”

Section: Signal Processing For the 2d-cnj Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Two-Dimensional Discretized Coherent Noise Jamming Method to Wideband LFM Radar

Gong¹,

Wei²,

Li³

et al. 2014

PIER Letters

View full text Add to dashboard Cite

show abstract

“…According to the relationship between SAR transmitted signal and its jamming, SAR ECM technologies can be divided into three types [7][8][9], i.e., non-coherent jamming, partially coherent jamming, and coherent jamming. Noncoherent jamming [10,11] is easiest to be designed, but needs largest transmit power and is most susceptible to the detection of SAR receiver. It can be cancelled through a number of Electronic CounterCounter Measures (ECCM) techniques, e.g., wideband sidelobecancellation [12], spatial filtering [13] and adaptive beamforming [14].…”

Section: Introductionmentioning

confidence: 99%

An Efficient Sar Jammer With Direct Radio Frequency Processing (Drfp)

Liu¹,

Dong²,

Wang³

et al. 2013

PIER

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Abstract-DRFM (Digital Radio Frequency Memory) is now widely utilized by modern radar jammers due to its high efficiency in jamming generation. However, its jammer structure is somewhat complex, since the up-conversion and down-conversion processes must be included. This paper proposes a new Synthetic Aperture Radar (SAR) jammer architecture utilizing Direct Radio Frequency Processing (DRFP), wherein both the up-conversion and down-conversion modules can be excluded. DRFP has a very compact hardware structure which employs Direct Digital Synthesizer (DDS), phase shifter, and delay lines for jamming modulation. Finally, the performances of DRFP are shown by both the inner-field test and a rail-way SAR experiment to be rather effective in jamming generation.

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“…The first type is the incoherent jamming, which shares the same bandwidth but is incoherent to the SAR transmit signal in the fast time [18,19]. The second type is known as the partially coherent jamming, which is coherent in the fast time but incoherent in the slow time [20,21].…”

Section: Introductionmentioning

confidence: 99%

The Interferometry Phase of Insar Coherent Jamming With Arbitrary Waveform Modulation

Liu¹,

Xing²,

Wang³

et al. 2012

PIER

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Abstract-This paper focuses on the interferometry phase of an active coherent jamming in InSAR (Interferometry Synthetic Aperture Radar) images. Based on the signal models of coherent jammer, the jamming's imaging results are derived by employing the Omega-K algorithm. By comparing the imaging results of InSAR's two channels, the jamming's interferometry phases for both working modes, the single-pass and repeat-pass modes, are proved to be constants. And the values of the interferometry phases are determined by the jammer's geometry position relative to InSAR baseline, but independent of the jamming's waveform modulation and its background terrain.

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Spaceborne synthetic aperture radar and noise jamming

Cited by 48 publications

References 0 publications

Two-Dimensional Discretized Coherent Noise Jamming Method to Wideband LFM Radar

Two-Dimensional Discretized Coherent Noise Jamming Method to Wideband LFM Radar

An Efficient Sar Jammer With Direct Radio Frequency Processing (Drfp)

The Interferometry Phase of Insar Coherent Jamming With Arbitrary Waveform Modulation

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