A time-domain raw signal Simulator for interferometric SAR

Mori, A.; Vita, F. De

doi:10.1109/tgrs.2004.832242

Cited by 80 publications

(34 citation statements)

References 12 publications

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“…In this section, we recall the rationale of the SAR raw signal simulation, as implemented in [2]. Let us consider a radar system located on a platform illuminating the earth's surface.…”

Section: Algorithm Descriptionmentioning

confidence: 99%

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An FPGA-based real-time UAV SAR raw signal simulator

Zhang

Hildre

et al. 2014

IEICE Electron. Express

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Faced with the high computational complexity of UAV SAR raw signal simulators, a multi-FPGA system is developed. The system is based on a time-domain raw signal algorithm which can compute in real time and can be used for closed-loop simulation. In order to improve the efficiency of the SAR slant range computing, a modified non-restoring squire root algorithm for FPGA is designed. An improved method is presented to perform coherent accumulation of raw signal to decrease memory cost. The pipelined FFT and IFFT are used to compute the convolution in order to reduce delay. The SAR raw signal generation system is implemented and verified with real-time performance. It can simulate an imaging scene size of 640 + 640 point scatters with a PRF higher than 40 kHz.

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“…In this section, we recall the rationale of the SAR raw signal simulation, as implemented in [2]. Let us consider a radar system located on a platform illuminating the earth's surface.…”

Section: Algorithm Descriptionmentioning

confidence: 99%

“…Several works on SAR raw signal simulation have been published in recent years [2]. Most of them concern using the algorithm to generate the raw signal.…”

Section: Introductionmentioning

confidence: 99%

An FPGA-based real-time UAV SAR raw signal simulator

Zhang

Hildre

et al. 2014

IEICE Electron. Express

View full text Add to dashboard Cite

show abstract

“…In various applications and imaging modes of single-channel SAR, some algorithms for its raw data generation of stationary clutter were proposed in (Jin 2010;Chang et al 2011;Buddendick and Eibert 2011;Zhang et al 2011;Mori and Vita 2004;Wang et al 2008;Qiu et al 2010;Franceschetti et al 2004). In this paper, the strip-mode multichannel SAR raw data simulation of stationary clutter and moving targets is discussed.…”

Section: Introductionmentioning

confidence: 99%

A fast multichannel SAR raw data simulator of clutter and moving targets

Mohammadi

Mahmoudi

2016

Multidim Syst Sign Process

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Accessibility of a fast and accurate multichannel synthetic aperture radar raw data generator of stationary clutter and moving targets has high importance, especially in the application of ground moving target indication. In this paper, a fast four-stage algorithm for generating the raw data of each channel stationary clutter and moving targets, has been proposed respectively in the frequency and the hybrid time-frequency domain. Using this simulator, in different conditions in terms of target motion speed, acceleration and direction, for each of the channels, after generating the raw data, its final image has been extracted by the range-Doppler algorithm. Then, using clutter suppression techniques such as DPCA, ATI and hybrid DPCA-ATI, the multichannel SAR final image has been obtained in ideal and nonideal conditions. Finally, the obtained images of the first channel have been studied using the extracted formulas for predicting the effects of target motion parameters on the SAR images as well as analyzing the multichannel SAR final image. The results show that the proposed algorithm for generating the raw data of each channel stationary clutter and moving targets has better performance in terms of speed and accuracy than the other existing simulators and the proposed multichannel SAR simulation method has high quality.

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“…SAR raw signal simulation offers a powerful tool to assess, and subsequently to mitigate, the effect of these motion errors. Time-domain simulation [16][17][18][19] is able to exactly account for the effects of motion errors, but for extended scenes, it is computationally inefficient. Frequencydomain simulation, based on the fast Fourier transform (FFT), for the ideal case was presented in [20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Efficient Sar Raw Data Simulation Including Trajectory Deviations and Antenna Pointing Errors

Guo¹,

Liu²,

Zhong³

et al. 2017

PIER B

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Abstract-Synthetic aperture radar (SAR) raw signal simulation is profoundly useful for validating SAR system design parameters, testing the effectiveness of different processing algorithms, studying the effects of motion errors, etc. Simulating signal data in frequency domain is more efficient than in time domain. However, the former is difficult account for the effects of both sensor trajectory deviations and antenna pointing error for the stripmap SAR mode. In this paper, we attempt to extend the possibility of the Fourier domain approach to account for trajectory deviations as well as antenna beam pointing errors, which is more concerned for airborne SAR systems. After demonstrating a full two-dimensional Fourier domain simulation, an efficient simulation approach is proposed under certain reasonable assumptions. The proposed approach has higher computational efficiency than simulation in time-domain and also allows for imaging an extended scene. The validity of the proposed approaches is analyzed and discussed. Finally, numerical examples are presented to verify the effectiveness and efficiency of the approach.

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A time-domain raw signal Simulator for interferometric SAR

Cited by 80 publications

References 12 publications

An FPGA-based real-time UAV SAR raw signal simulator

An FPGA-based real-time UAV SAR raw signal simulator

A fast multichannel SAR raw data simulator of clutter and moving targets

Efficient Sar Raw Data Simulation Including Trajectory Deviations and Antenna Pointing Errors

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