Phase linear analysis method and system for detecting DBF function of radar system

Abstract

The invention relates to a phase linear analysis method and system for detecting the DBF function of a radar system. The method comprises steps of: segmenting respective baseband digital signals of a radio frequency receiver into several data segments; converting the segmented data segments into corresponding complex signals and estimating the phase sequences of the complex signals in respective data segments; comparing the phase sequences with phase sequences in respective data segments of a reference channel to obtain the relative phase sequences in respective data segments of each channel, and calculating the average value of the relative phase sequences of respective data segments; estimating the linearity of a sequence formed by the relative phase average value of respective data segments in each channel to obtain the curve slopes of respective sequences, and comparing the curve slope of respective channels to obtain a DBF function detection result. The phase linear analysis method and system, by analyzing the relative phase linearity of each channel, eliminates the influence of the inherent phase of respective channels, improves the precision of the DBF function detection, and simplifies the circuit structure of the radar system.

Description

technical field [0001] The invention relates to the technical field of radar remote sensing, in particular to a phase linear analysis method and system for radar system DBF function detection. Background technique [0002] DBF (Digital Beam Forming) is a digital beam forming technology. Its basic principle is to convert the radio frequency echo signal received by each antenna array unit into an intermediate frequency signal through a radio frequency receiver, and then convert it into a digital signal through high-speed digital acquisition, and then Amplitude and phase weighting processing is performed in the digital signal processing unit to form the required receiving beam. DBF technology has the advantages of fast and flexible scanning, high resolution, and excellent anti-interference and clutter performance. The DBF technology is applied to the satellite radar, and the space diversity effect of the array antenna can be used to realize multi-beam coverage on the earth's s...

AI Technical Summary

Problems solved by technology

[0018] The purpose of the present invention is to provide a phase linear analysis method and system for radar system DBF function detection in order to solve the technical problems of low calibration accuracy and complex operation in the existing radar system DBF performance detection method; The system and method can accurately and quickly test the DBF function of the radar system, and do not need to calibrate the influence of the inherent phase of the receiving channel, and are suitable for the function detection of the DBF of the radar system under far-field conditions

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