Revolutionary ideas in test

Schroer, R.

doi:10.1109/maes.2002.1010120

Cited by 2 publications

(2 citation statements)

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“…Comparing Equation (2) with Equation (3), we can see that the first phase term in the second line of Equation (3) is the same as Equation (2), which is the basic imaging term containing the useful information about locating and focusing the scene target. But the second phase term resulting from the random frequency offset ∆ f i is undesirable and needs to be eliminated to restore the correct 2-D phase history.…”

Section: Agility Of Carrier Frequencymentioning

confidence: 99%

“…Thus, it has the risk of interference, which reduces the reconnaissance efficiency of airborne SAR in electronic countermeasure environments [1]. Therefore, electronic countermeasures (ECMs) [1][2][3][4] have become the main challenge faced by airborne SAR sensors. To address this issue, electronic countercountermeasures (ECCMs) [5][6][7] have also become one of the main research interests in the field of airborne SAR.…”

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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Section: Agility Of Carrier Frequencymentioning

confidence: 99%