High-resolution complete-polarization insect radar detection system and detection method thereof

Abstract

The invention provides a high-resolution complete-polarization insect radar detection system, being able to obtain insect orientation information and high resolution distance information. The high-resolution complete-polarization insect radar detection system realizes narrow pulse high resolution by using step frequency, and realizes narrow pulse complete polarization high isolation by means of orthogonal phase coding, and the coding depends on the system of step frequency. The high-resolution complete-polarization insect radar detection system uses a step frequency synthesis broadband to obtain high resolution range profiles of insects (the range resolution is better than 0.2m) to obtain accurate range information of migratory insects for positioning and statistics. The high-resolution complete-polarization insect radar detection system acquires the insect orientation information in real-time through complete polarization to analyze the air orientation mechanism of insects, can solvethe problem of insufficient measurement performance of existing insect radar body orientation and air density, and can provide technical support for migratory insect observation.

Description

technical field [0001] The invention relates to the field of radar technology, in particular to a high-resolution (distance resolution better than 0.2m) full-polarization insect radar detection system and a detection method thereof. Background technique [0002] The insect radar in the prior art can realize the detection of various migratory insects which are of great significance to agriculture, but there are many deficiencies. First of all, the resolution of existing insect radars is very low, and the distance resolution units are mostly on the order of tens of meters, which is equivalent to the density distribution of insects. When two insects fall into the same distance resolution unit, existing insect radars cannot Therefore, it is difficult to ensure the correct statistics of the number of insects, and it is even more difficult to accurately locate them. If the system design requirements of full polarization are not considered, the system of frequency modulation and s...

AI Technical Summary

Problems solved by technology

In order to reduce the pressure of data acquisition and storage and waveform generation, the bandwidth of a single pulse of insect radar should also be reduced accordingly, which not only results in a corresponding decrease in time-width-bandwidth product, but also insufficient polarization isolation; it also leads to a decrease in distance resolution

[0004] Although the working system of FM stepped frequency radar can improve the synthesized signal bandwidth, the synthesized broadband will not lead to a change in the time-width-bandwidth product of a single pulse, and the full polarization isolation performance brought by the positive and negative frequency modulation system depends entirely on a single pulse Time-width-bandwidth product, so the high-resolution insect radar based on FM step-frequency system has the problem of full polarization isolation

It can be seen that the single wide bandwidth pulse and positive and negative frequency modulation transmission waveform system adopted by traditional high-resolution full-polarization radar is not suitable for realizing the high-resolution full-polarization function of insect radar

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