Simplified High-Resolution Template Simulator in SAR Seeker HWIL Simulation

Document Type : Original Article

Authors

1 telecommunications group, electrical eng. dep., Babol Noshirvani university of technology, Babol, Iran

2 telecommunications group, electrical eng. dep., Babol Noshirvani University of Technology, Babol, Iran

Abstract

With the development of high resolution synthetic aperture radar (SAR) technology, new challenges are emerging in the test stage of the SAR seekers using hardware in the loop (HWIL) simulation. In fact, in order to establish a confident HWIL simulation, the simulator should also generate the echo signal with the same resolution the SAR performs image processing. Echo signal generation by high resolution target template faces the issue of dealing with the incremental computation resources and contradicts with the real time requirement of HWIL simulation. In this paper, the potential of a very high resolution SAR test experiment by means of a lowered resolution simulator in HWIL simulation will be discussed. As the first step, we put forward a simple method of template resolution reduction to overcome the high time-consuming and computational resource requirement of high resolution SAR HWIL simulation and then theoretically explore the influence of template resolution reduction on the final SAR imaging. In this way, the resolution of the SAR seeker is kept fixed, and the scene simulator is forced to generate the echo signal at a lower resolution. In comparison to conventional echo signal generation, the proposed method can clearly better manage the hardware requirement of HWIL simulation and obtain acceptable imaging results. The results of the proposed method are compared with the reference one in terms of structural similarity index (SSIM) and the peak signal-to-noise ratio (PSNR) as performance evaluation criteria. Simulation results on an actual SAR template verify the good performance of the approach.

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TABRIZ JOURNAL OF ELECTRICAL ENGINEERING

Articles in Press, Corrected Proof
Available Online from 07 September 2024

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