Design and implementation of real-time SAR echo simulator for natural scene

A Real-time SAR Echo Simulator Based on FPGA and Parallel Computing

“…Because of the wide coverage offered by the antenna beam, the large image resolution required, and the long PRT, the demands on computing power are strict and real-time capabilities are limited [5,6]. Wen Liang from the Beijing Institute of Technology proposed a multi-chip DSP parallel computing SAR real-time simulator but the delay of the simulator is too long [7]. Yi Yongjun et al and Sachin B. et al proposed a FPGA-based SAR simulator, but it must perform two separate FPGA calculations, which limits its computing capacity and cannot be used to perform real-time simulations [8,9].…”

The influence of a SAR sensor trajectory deviation on the pip azimuth position in echo signals simulation based on prearranged samples

“…E CHO SIGNAL SIMULATORS are widely applicable for the development of synthetic aperture radars (SAR) [1][2][3]. Signals formed by simulators are fed to the input of radar or its elements, so the equipment operation is checked in laboratory environment.…”

“…Signals formed by simulators are fed to the input of radar or its elements, so the equipment operation is checked in laboratory environment. This considerably reduces the extent of full-scale testing and therefore time and material costs [1]. Such tests are called semi-natural.…”

“…is the function which describes the modulating signals by the antenna radiation pattern; i r is the scatterer i slant range; c -the radio propagation velocity; λ is the radar signal wavelength. Calculating samples of the signal (1) in real time requires very high performance of computer aids [1,2]. Consequently present methods of echo signal simulation may be divided into two principal groups.…”

“…Consequently present methods of echo signal simulation may be divided into two principal groups. In the first case, signal samples are directly calculated in real time [1], in the second one, they are prepared previously [3,4]. The first group drawback is noted above.…”