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In ISAR imaging of the target with rotating parts, the motion compensation algorithm is usually invalid because the disturbance of rotating parts. To solve this problem, this paper proposes a novel algorithm based on dividing the data into several pieces. The range profile is divided into several parts, then the interesting part is selected by the minimum entropy criterion, finally the influence of...
Ubiquitous radio: is a new radar system that provides continuous and uninterrupted multifunction capability within a coverage volume. Continuous coverage from close-in "pop-up" targets in clutter to long-range targets impacts selection of waveform parameters. The CPI (Coherent Processing Interval) must be long enough to achieve a certain signal-to-noise ratio (SNR) that insures the efficiency...
Circular-scanning Synthetic Aperture Radar (SAR) can quickly generate vast maps of earth's surface, providing precise positioning information by scene-matching approach. Although it has gained more attention to improve the imaging method, the quantitative comparison of the theory performance, between circular-scanning SAR and other classical imaging SAR mode, is obliviously performed in previous work...
Based on difference of target azimuth sensitivity between radar feature and infrared(IR) feature, this paper presents a new algorithm for fusion recognition. By estimating the target azimuth through the infrared feature matching, the search domain of radar feature base and calculation of feature training are reduced. Through introducing a new conflict ratio of fusion, recognize feedback is used to...
The centerline is an important feature in ISAR image features. In this paper, a new ship centerline extraction algorithm is presented. In the improved algorithm, the width character is used in the extraction of the ship centerline, and the line detection in normal centerline detection methods is replaced by line group detection. After finding the ship width and angle, the centerline position can be...
Due to the self rotation and revolution of the earth and the satellite moving comparatively, the delay rate changes intricately and that affects correlation result when we use VLBI to detect Satellite. To solve the problem, a new method of delay-delay rate 2-D correlation is proposed which based on time-frequency 2-D correlation. This method applies ambiguity function calculation of time-frequency...
In the modern battlefield, radar faces more and more serious threats from ECM (Electronic Counter Measure) and ARM (Anti Radiation Missile), etc. Only the LPI (Low Probability of Intercept) radar can survive. DAR (Digital Array Radar) has higher flexibility of digital processing and offers a number of attractive features than conventional phased array radar. In this paper, how time-energy management...
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