Interference condition-based monopulse radar object and interference source angle measuring method

Abstract

An interference condition-based monopulse radar object and interference source angle measuring method is disclosed and relates to the technical field of radar electronic countermeasures. A radar receiving antenna is transformed into a double polarization reception antenna, corresponding sum-difference networks and receiving channels are added, and a dual polarization monopulse radar device is formed; according to horizontal polarization sum, azimuth difference and pitching difference three channel output data of the radar device as well as vertical polarization sum, azimuth difference and pitching difference three channel output data, polarization characteristics of compound jamming can be estimated, polarization ratios of an object and interference can be substituted into a mathematical formula which then can be solved, errors of coupling between the interference signals and an object angle can be eliminated, and a real object angle can be estimated while a real angle of an interference source can be estimated; the invention provides a simple and effective main lobe compound jamming resisting method which is easy to implement in the engineering field; the method disclosed in the invention can be applied to conventional object indication radar devices, tracking and guiding radar devices, terminal guiding radar devices and fire control radar devices and is of great practical significance.

Description

technical field [0001] The invention relates to the technical field of radar electronic countermeasures, in particular to a method for measuring the angle of a single-pulse radar target and an interference source under interference conditions. Background technique [0002] It is well known that monopulse radar angle measurement is a relatively mature technology and is widely used in high-precision tracking radar systems. However, when there are similar and different targets and noise suppression interference sources in the main beam of the radar, the target echo will be overwhelmed by the interference with a certain bandwidth in the time and frequency domains. After conventional signal processing, the monopulse radar cannot Effective detection of targets, or false detection and tracking of interference sources, the output of single-pulse angle measurement is the weighted average of physical space targets and interference, which cannot give correct angle indications, thereby ...

AI Technical Summary

Problems solved by technology

However, due to the existence of residual interference signals after filtering, there is always a certain deviation in the angle measurement value. In addition, filtering may reduce the signal-to-noise ratio and have a negative impact on subsequent detection.

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