On-line detection method of amplitude and phase errors of multi-channel array radar based on signal processing

Abstract

The invention discloses a multi-channel array radar amplitude-phase error online detection method based on signal processing. The method is mainly characterized by determining a multi-channel array radar, wherein a target exists in the detection range of the multi-channel array radar, the target being recorded as a reference target, and the multi-channel array radar emits P pulses to the reference target and receives echo signals reflected by the reference target, the echo signals being recorded as echo signal data reflected by the reference target; obtaining an echo signal data set s obtained after the reference target reflects the P pulses and a beam scanning chart of the P pulses; judging whether the pulses, from the first pulse to the Pth pulse, is normal in sequence, P' representing the number of normal pulses, and P" representing the number of abnormal pulses, 0<=P'<= P, 0<= P"<= P, P'+P"=P, P' and P" being a positive integer larger than or equal to 0; and carrying out amplitude-phase error analysis on the P" pulses and the P' pulses respectively according to the echo signal data set s obtained after the reference target reflects the P pulses, and furthermore, obtaining a multi-channel array radar amplitude-phase error online detection result based on signal processing.

Description

technical field [0001] The invention belongs to the technical field of radar signal processing, in particular to an on-line detection method for amplitude and phase errors of a multi-channel array radar based on signal processing, which is suitable for detecting and correcting the array channel amplitude mismatch and phase mismatch of the multi-channel array radar. Background technique [0002] Radar is a device that uses electromagnetic waves to find targets and determine the specific location of targets. It has important applications in military and daily life. The performance status of radar determines the reliability of its work. The self-checking system of radar can check the performance of radar Carry out automatic detection; when there is a problem with the status of the radar and the performance is degraded, the radar's self-inspection system will feed back to the radar user, and the radar user will repair the radar according to the self-inspection result to ensure th...

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Problems solved by technology

[0007] Although the analog signal method can detect the phase and amplitude errors in the analog radar echo signal, it cannot monitor the working status of the radar in real time, cannot diagnose the fault of the radar in time, and will also affect the work of the radar system.

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