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By varying the rate of linear frequency modulation (LFM) signal, radar could effectively penalize a Digital Radio Frequency Memory (DRFM) detective jammer to some extent. Since the enemy utilizes inaccurate information of the radar signal to generate false targets. However, with the increment of false targets and the disturbance-signal-ratio (DSR) of radar echoed signal, the capacity of traditional...
The random pulse initial phase radar has potential applications in suppressing digital radio frequency memory (DRFM) repeat jamming, due to the significant differences between the repeat jamming and the true target echo in phases. However, owing to phase randomness and existence of false targets, the high sidelobe pedestal generated in correlation processing will decrease the performance of target...
For random pulse initial phase radar, the echo signal of false velocity target which is emitted by digital radio frequency memory (DRFM) repeat jammer always lags several pulse repetition interval (PRI) behind that of true target in terms of pulse initial phase. Consequently, the lag causes the difference in phase at the same PRI, and it provides the possibility of false target identification. Firstly,...
In this paper, a novel hash-based image content authentication scheme for tamper detection and localization is proposed. The original image is divided into sub-blocks whose size can be tuned with the accuracy of tamper localization, and the measurements which are obtained in the compressed sensing (CS) process contain all the information of the subblocks. Moreover, singular value decomposition (SVD)...
Based on the compressed sensing (CS), we present a novel framework of moving target detection in random PRI radar. Firstly, the statistical characteristics of correlation output are analyzed to reflect the sidelobe pedestal. Then the equivalent sensing matrix is verified to approximately accord with the restricted isometry property by comparing it to a typical random CS matrix in a statistical sense...
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