Photon-assisted pulse system microwave radar detection method and device

Abstract

The invention discloses a photon-assisted pulse system microwave radar detection method, and the method comprises the steps: carrying out the double-sideband modulation of carrier suppression of an optical carrier through a linear frequency modulation microwave pulse signal; performing minimum point modulation on the generated carrier-suppressed double-sideband modulation signal by using an envelope signal of the linear frequency modulation microwave pulse signal through an electro-optical modulator to generate a high extinction ratio optical pulse, dividing the high extinction ratio optical pulse into two paths, one path being used as an optical intrinsic reference signal, and the other path being used as an optical intrinsic reference signal; converting the other path into an electric pulse signal to be emitted as a radar detection signal; and carrying out optical domain mixing dechirping processing on the radar echo signal and the optical intrinsic reference signal subjected to timedelay matching to realize two-dimensional imaging of the target. The invention further discloses a photon-assisted pulse system microwave radar detection device. According to the invention, the detection requirements of long-distance and high-resolution imaging radar can be met.

Description

technical field [0001] The invention relates to the technical field of microwave radar, in particular to a photon-assisted pulse system microwave radar detection method and device. Background technique [0002] Microwave imaging radar, as a method that can meet the needs of all-weather and all-weather detection at this stage, is often used in areas such as autonomous driving, geological and terrain exploration, marine pollution detection, and disaster prevention and mitigation. At the same time, microwave imaging radar is also highly valued by various countries in the military, and can be used to achieve accurate and intelligent identification of targets. [0003] Range resolution is an important indicator of microwave imaging radar, which depends on the signal bandwidth of the radar system. However, the traditional method is limited by the "electronic bottleneck" and it is difficult to further expand the bandwidth. Due to its technical advantages such as large bandwidth, ...

AI Technical Summary

Problems solved by technology

However, most of the existing high-resolution microwave imaging radar research based on microwave photonics focuses on how to further improve the resolution, and there is no research on improving the detection range of microwave photon imaging radar systems, especially in long-distance situations.

[0004] With the improvement of the detection distance, microwave imaging radar, especially the imaging radar based on the de-skewing system, faces two problems: on the one hand, it is difficult to increase the signal power based on the FM continuous wave method, which cannot meet the needs of long-distance detection; The amount of oblique data is greatly increased, limiting the processing speed

The above problems limit the further improvement of imaging radar detection range

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