System and method for testing phase error estimation of synthetic aperture sonar system

Abstract

The invention discloses a system and a method for testing the phase error estimation of a synthetic aperture sonar system. The system is characterized by comprising a sonar echo signal calculation module, an analogue output module and a test evaluation module, wherein the sonar echo signal calculation module is used for calculating a sonar echo digital signal according to set working parameters, sonar basic matrix motion information, analogue scene information and phase error information e(y); the analogue output module is used for converting the sonar echo digital signal output by the sonar echo signal calculation module into a sonar echo analogue signal, and inputs the sonar echo analogue signal to the synthetic aperture sonar system for estimating to obtain a phase error e1(y); and thetest evaluation module is used for finishing testing the phase error estimation performance of the synthetic aperture sonar system by comparing the phase error e1(y) estimated by the synthetic aperture sonar system with the phase error information e(y) of an initially generated sonar echo signal.

Description

technical field [0001] The invention relates to the field of sonar system testing, in particular to a testing system and method for estimating the phase error of a synthetic aperture sonar system. Background technique [0002] Synthetic aperture sonar (Synthetic Aperture Sonar: SAS) uses the movement of the small-sized matrix in the azimuth direction to form a virtual large aperture, and obtains high-resolution sonar images by coherently processing the sonar echo signals at different positions. Phase error has a great influence on synthetic aperture sonar imaging. The main factors causing phase error include motion error and multi-channel consistency. Phase error estimation and compensation are one of the important components of synthetic aperture sonar signal processing. The synthetic aperture sonar system includes multiple modules such as data acquisition, data transmission and signal processing. Therefore, it is relatively difficult to jointly debug the synthetic apertur...

AI Technical Summary

Problems solved by technology

Even through the pool test, due to the limitation of the scale of the pool, it is difficult to accurately debug the phase error estimation module of the synthetic aperture sonar

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