Passive radar direction finding method and system based on double-receiver square crossing scanning

Abstract

The invention discloses a passive radar direction finding method and system of double-receiver square crossing scanning. The passive radar direction finding method includes the steps of receiving a first echo signal of a first receiver; obtaining a second echo signal of a second receiver, and building a first signal identification matrix according to a movement track function of the first receiver; according to the first echo signal and the first signal identification matrix, determining a first direction finding preprocessing vector; building a second signal identification matrix according toa movement track function of the second receiver; according to the second echo signal and the second signal identification matrix, determining a second direction finding preprocessing vector; according to the first direction finding preprocessing vector and the second direction finding preprocessing vector, determining the direction of a target to be detected. According to the passive radar direction finding method and system of double-receiver square crossing scanning, through double-receiver elliptical square crossing scanning, the occupied space of a system can be reduced, side lobes are effectively inhibited, the systematic resolution is optimized, and the direction finding performance of the system is improved.

Description

technical field [0001] The invention relates to the field of passive radar direction finding, in particular to a passive radar direction finding method and system based on dual receiver vertical cross scanning. Background technique [0002] The current radar direction finding methods for fixed targets are mainly divided into active radar direction finding and passive radar direction finding. Active direction finding radar includes real aperture radar or array antenna direction finding, and its azimuth resolution is , where is the signal wavelength, and is the radar aperture or array antenna length. In order to improve the accuracy of direction finding, active direction finding radar systems generally use large-aperture antennas or long array antennas, so the system is expensive and occupies a large area. In addition, due to active electromagnetic exposure, its survivability on the battlefield is worrying. In the method of passive radar direction finding, it is represented ...

AI Technical Summary

Problems solved by technology

However, the maximum side lobe of the direction finding result of this system is as high as -7.9dB, and the strong side lobe may overwhelm the weak main lobe when multi-target direction finding occurs, resulting in target loss

Images