Method for Simplifying Echo Spectrum of Bistatic Synthetic Aperture Radar with Arbitrary Configuration

Abstract

The invention discloses a method applied to simplification of a random-configuration bistatic synthetic aperture radar echo frequency spectrum. The method comprises the following steps: initializing parameters, discretizing a GBSAR frequency spectrum phase, carrying out approximation of frequency spectrum phase space function, weighing and summating sum of frequency function of the frequency spectrum to obtain a simplification expression. The method applied to simplification of the random-configuration bistatic synthetic aperture radar echo frequency spectrum has the advantages that the linear fitting of the space composite function and frequency composite function in the GBSAR frequency spectrum phase is carried out by a discrete linear least squares method, the GBSAR frequency spectrum is simplified from the polynomial sum to the binomial sum, efficient focusing and imaging are implemented according to the simplification equation by an efficient frequency domain image processing technology, and the GBSAR frequency spectrum is simplified with high efficiency and high accuracy.

Description

technical field [0001] The invention belongs to the technical field of radar, in particular to a method for simplifying the echo spectrum of a bistatic synthetic aperture radar with any configuration. Background technique [0002] Arbitrary configuration bistatic synthetic aperture radar (General bistatic synthetic aperture radar, referred to as GBSAR) is that the transmitter and receiver are placed on various types of platforms such as satellites, aircrafts, and stationary stations, and the platforms are arranged in any geometric configuration. 2D imaging system. Due to the diversity of system platforms and the arbitrariness of geometric configuration, the GBSAR system can conduct multi-angle flexible reconnaissance of the target area of ​​interest, thereby obtaining rich target scattering information. Therefore, the GBSAR system can be applied to all-weather and all-weather aircraft autonomous navigation, target reconnaissance and identification and other fields, and play...

AI Technical Summary

Problems solved by technology

However, due to the locality of the Taylor approximation, these methods can only be used in some special configurations of bistatic SAR systems with small target scene ranges or small spatial variability

Therefore, the existing bistatic synthetic aperture radar spectrum simplification method is not suitable for the actual application requirements of high-performance imaging of large-scene GBSAR with multiple platforms and arbitrary configurations

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