为了降低测试雷达系统的成本,设计出一种实时雷达回波模拟器对测试雷达系统的各项参数有很大的帮助。文中采用等效散射体回波模拟算法设计了一种基于FPGA的SAR回波模拟器。通过优化回波模拟算法,实时实现了SAR的回波模拟。实验结果表明,该设计模拟器可以在10. 7 s内模拟出一帧1 024×1 024 的自然场景的回波数据。最后对回波数据成像质量评估,证明了该回波模拟器的正确性。

In order to reduce the cost of simulation and verifying of radar system, designing a real-time echo simulator is of great help. On the basis of optimizing the echo simulation algorithm, a real-time SAR echo simulator is presented in this paper. The software and hardware of the simulator are discussed in detail. Experiment results and system tests show that the simulator can simulate a natural scene with 1 024×1 024 scatters in less than 10. 7 seconds, which is much faster than computers with dual-core Pentium processor E5800 and 2G memory.

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