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In this paper, a novel coherent integration method known as Radon-advanced discrete chirp Fourier transform (RADCFT) is proposed to detect low-observable maneuvering targets. It can eliminate the range migration (RM) effect by searching along motion trajectory, as well as remove Doppler frequency migration (DFM) effect via advanced discrete chirp Fourier transform (ADCFT). When the searching motion...
In geosynchronous (GEO) synthetic aperture radar (SAR), the high orbit height and the long integration time would lead to the significant round-trip delay time and the curved flight path, thus the traditional range model with ‘stop-go’ assumption will be ineffective. In this Paper, based on the analysis of instantaneous Doppler frequency of GEO SAR, an equivalent midpoint mathematical model is proposed...
In this paper, a target detector with frequency diverse array (FDA) multiple-input and multiple-output (MIMO) radar in a homogenous environment is proposed. Unlike the conventional MIMO radar, the system uses FDA transmitting array. The essence of the proposed technique is to formulate a range-angle dependent detector with FDA MIMO radar. The detector assumes the signals belonging to conic regions,...
A new wavenumber domain mapping method for the highly squinted beam steering synthetic aperture radar (BS-SAR) is analysed. After the mapping operation, the two dimensional (2-D) spectrums have a broadside form which can be regarded as an equivalent broadside SAR. Furthermore, a novel 2-D two-step approach is introduced to avoid spectral aliasing and skewing caused by the beam steering and the high...
This paper analyzes the signal properties of the spotlight synthetic aperture radar (SAR) diving with the acceleration. According to the special signal properties of spotlight mode, an approximation of the range equation is made to avoid using the method of series reversion (MSR). Based on the new range equation, a modified omega-K algorithm with the improved two-step approach is proposed. The proposed...
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