Signal processing method, system and device based on phased array incoherent scattering radar

Abstract

The invention belongs to the field of signal and information processing, particularly relates to a signal processing method, system and device based on a phased array incoherent scattering radar, andaims to solve the problems of low real-time performance and accuracy of signal processing of the existing incoherent scattering radar. The method comprises the following steps: acquiring an echo signal scattered by an ionized layer to aquire an IQ digital signal as a first signal through down-conversion, AD sampling and digital orthogonal down-conversion; performing complex weighting and summationoperation on the first signal to obtain a second signal; removing clutters of the second signal through a preset clutter removing method, and obtaining autocorrelation data through a frequency domainFFT algorithm; circularly acquiring autocorrelation data, accumulating the autocorrelation data, removing background noise after accumulation, and performing calibration correction through a preset data calibration method and a spectrum ambiguity function; and fitting the calibrated and corrected data with theoretical autocorrelation data to obtain ionospheric parameters. According to the invention, the real-time performance and the accuracy of signal processing of the incoherent scattering radar are improved.

Description

technical field [0001] The invention belongs to the field of signal and information processing, and in particular relates to a signal processing method, system and device based on phased array incoherent scattering radar. Background technique [0002] The ionosphere is an area formed by the ionization of particles in the upper atmosphere due to the impact of high-energy particles in the sun, and the main height is about 60-1000km. There are a large number of ions and free electrons in the ionosphere, which can cause reflection and scattering of electromagnetic wave signals. Therefore, the research on ionosphere detection is of great significance to satellite navigation and radio communication. At present, the most advanced and effective tool for detecting the ionosphere is the high-power phased array incoherent scatter radar. The principle of incoherent detection is: the electromagnetic wave emitted from the ground will cause scattering in the ionosphere due to the thermal ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above-mentioned problems in the prior art, that is, in order to solve the problem of low real-time and low accuracy of the signal processing of the existing incoherent scatter radar, the first aspect of the present invention proposes a phased array based incoherent scatter radar A signal processing method that includes:

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