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为了全面评估合成孔径雷达(syn thes is apertureradar,SAR)实时成像处理器的性能,该文将现有的SAR成像处理器的结构分为串行结构、并行结构和混合结构,提出加速比,吞吐量,有效利用率等有效的系统结构指标及其计算方法,并结合成像质量指标,用于系统性能的全面评估。对采用Ch irp Sca ling算法的某星载SAR并行结构和串行结构实时成像处理器的指标分析表明:在相同的成像质量指标下,并行结构的系统性能指标明显优于串行结构。基于该文提出的成像质量指标和系统结构指标相结合的评估体系,可以全面评估和优化SAR成像处理器的设计。
In order to fully evaluate the performance of SAR imaging real-time imaging processor, this paper divides the structure of the existing SAR imaging processor into serial structure, parallel structure and hybrid structure, Volume, effective utilization of effective system structure indicators and calculation methods, combined with imaging quality indicators for a comprehensive assessment of system performance. Analysis of the real-time imaging processor of a spaceborne SAR parallel structure and a serial structure using Chirp Sca ling algorithm shows that the system performance of the parallel structure is obviously better than that of the serial structure under the same imaging quality index. Based on the proposed evaluation system of image quality index and system structure index, the design of SAR imaging processor can be fully evaluated and optimized.