Microwave stare correlated imaging device capable of performing random frequency hopping based on different code speeds

Abstract

The invention discloses a microwave stare correlated imaging device capable of performing random frequency hopping based on different code speeds. A random radiation unit is used for generating and transmitting a microwave pulse signal according to control information transmitted by a main control unit, the microwave pulse signal forms a microwave radiation field having time-space two-dimensional random features in a target area, the scatter echo of an observation target in the target area is received by a receiving unit, and a correlated imaging device is used for correlating the scatter echo with a microwave radiation field to obtain an inversion image observation target; the microwave pulse signal transmitted by each radiation antenna is the same in the pulse period and the pulse repeating frequency, each microwave pulse signal comprises a plurality of random frequency hopping sub-pulses, a frequency point is selected randomly in a bandwidth range, microwave pulse signals transmitted by different radiation antennas are different in random frequency hopping sub-pulse frequency hopping code speed, and frequency hopping patterns are orthogonal. An ideal time-space two-dimensional random radiation field which is required by microwave stare correlated imaging is realized on the aspect of engineering under the conditions of low code speed transmission, low-speed acquisition and lower bandwidth.

Description

technical field [0001] The invention relates to the technical field of radar imaging, in particular to a microwave staring associated imaging device based on random frequency hopping at different code rates. Background technique [0002] Radar Imaging technology is a leap in the history of radar development. It expands the original detection (Detection) and ranging (Ranging) functions of radar. Panoramic radar imagery. Although synthetic aperture radar (SAR) has high azimuth resolution, its revisit period is long, and it has inevitable inherent disadvantages in scenarios that require long-term (quasi) continuous staring observation and imaging; traditional real aperture radar For staring imaging, its angular resolution is limited by the aperture of the actual antenna array, which limits its practical application. [0003] For microwave staring correlation imaging, an ideal space-time two-dimensional random radiation field is a prerequisite for realizing the above-mentioned...

AI Technical Summary

Problems solved by technology

Although synthetic aperture radar (SAR) has high azimuth resolution, its revisit period is long, and it has inevitable inherent disadvantages in scenarios that require long-term (quasi) continuous staring observation and imaging; traditional real aperture radar Staring imaging, whose angular resolution is limited by the actual antenna array aperture, limits its practical application

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