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在空间太阳望远镜的在轨高速数据处理中,运算时间是影响系统性能的重要环节之一。利用FPGA丰富的逻辑单元实现快速傅里叶变换(FFT),解决了在轨实时大数据量图像处理与航天级DSP运算速度不足之间的矛盾;利用溢出监测移位结构解决了定点运算的动态范围问题。经过实验验证,各项指标均达到了设计要求。
In space orbit telescope high-speed data processing, computing time is an important part of the system performance. The fast Fourier transform (FFT) is realized by the abundant logic unit of FPGA, which solves the contradiction between the real-time large data amount in-orbit processing and the shortage of space-grade DSP operation speed. The overflow monitoring shift structure solves the problem of fixed-point operation Scope issues. After experimental verification, the indicators have reached the design requirements.