Chaotic laser-based ultra wide band throughwall radar detection device

Abstract

The invention discloses a chaotic laser-based ultra wide band throughwall radar detection device, wherein the chaotic laser is sent out by an ultra wide band chaotic laser source and is modulated by a time signal into a periodically-emitted chaotic laser impulse sequence after passing through an electrooptical modulator, the chaotic laser impulse sequence is separated into a detected signal and areference signal by an optical fiber coupler, the detected signal is injected into a photoelectric detector to be converted into an ultra wide band microwave signal, the ultra wide band microwave signal is amplified by a preamplifier and sent out by an ultra wide band microwave transmitting antenna; and at a receiving end, the return signal which is scattered by a target object passes through an obstacle and then received by two paths of receiving antennas, the received return signal is amplified by a low noise amplifier, synchronously acquired by a synchronous acquisition system, and then input into a digital correlator for being correlated with the reference signal which is converted into an electrical signal after passing through a quick light variable delay line and the photoelectric detector, so the characteristic information of the target object is obtained, two paths of characteristic information are input into a signal processing system to be processed for obtaining the azimuth angle and distance of the target object, so the locating and the two-dimensional imaging of the target object are realized.

Description

technical field [0001] The invention relates to a radar detection device, in particular to a chaotic laser-based ultra-wideband through-wall radar detection device composed of a transmitting end and a receiving end, which is used for post-disaster personnel rescue, military affairs, anti-terrorism, non-destructive detection of cultural relics and life detection. Background technique [0002] Since World War II, radar has played an increasingly important role in aviation, aerospace, transportation, weather forecasting, geodesy and military affairs. As an important means of obtaining spatial information, radar plays a pivotal role in modern battlefields and ruins in disaster areas. [0003] Today, major powers in the world are facing severe challenges in the fight against terrorism. If you can find the enemy hidden behind the wall, you will undoubtedly increase your chances of winning and reduce casualties; in the ruins of fire and earthquake, if you can know the survivors Th...

AI Technical Summary

Problems solved by technology

[0017] The purpose of the present invention is to provide a chaotic laser-based ultra-wideband through-wall radar detection device to solve the problem of low resolution of the existing ultra-wideband through-wall radar

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